Merge branch 'al2-aarch64' into 'master'

Add aarch64 build for Amazon Linux 2

See merge request nvidia/container-toolkit/container-toolkit!55

.common-ci.yml

@@ -0,0 +1,97 @@
+# Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+default:
+  image: docker:stable
+  services:
+    - name: docker:stable-dind
+      command: ["--experimental"]
+
+variables:
+  IMAGE: "${CI_REGISTRY_IMAGE}"
+  IMAGE_TAG: "${CI_COMMIT_REF_SLUG}"
+  BUILDIMAGE: "${CI_REGISTRY_IMAGE}/build:${CI_COMMIT_SHORT_SHA}"
+
+stages:
+  - image
+  - lint
+  - go-checks
+  - go-build
+  - unit-tests
+  - build
+  - build-long
+  - scan
+  - release
+
+build-dev-image:
+  stage: image
+  script:
+    - apk --no-cache add make bash
+    - make .build-image
+    - docker login -u "${CI_REGISTRY_USER}" -p "${CI_REGISTRY_PASSWORD}" "${CI_REGISTRY}"
+    - make .push-build-image
+
+.requires-build-image:
+  image: "${BUILDIMAGE}"
+
+.go-check:
+  extends:
+    - .requires-build-image
+  stage: go-checks
+
+fmt:
+  extends:
+    - .go-check
+  script:
+    - make assert-fmt
+
+vet:
+  extends:
+    - .go-check
+  script:
+    - make vet
+
+lint:
+  extends:
+    - .go-check
+  script:
+    - make lint
+  allow_failure: true
+
+ineffassign:
+  extends:
+    - .go-check
+  script:
+    - make ineffassign
+  allow_failure: true
+
+misspell:
+  extends:
+    - .go-check
+  script:
+    - make misspell
+
+go-build:
+  extends:
+    - .requires-build-image
+  stage: go-build
+  script:
+    - make build
+
+unit-tests:
+  extends:
+    - .requires-build-image
+  stage: unit-tests
+  script:
+    - make coverage
+

.gitignore

@@ -1,3 +1,7 @@
 dist
 *.swp
 *.swo
+/coverage.out
+/test/output/
+/nvidia-container-runtime
+/nvidia-container-toolkit

.gitlab-ci.yml

@@ -12,91 +12,28 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# Build packages for all supported OS / ARCH combinations
-
-stages:
-  - tests
-  - build-one
-  - build-all
-
-.tests-setup: &tests-setup
-  image: golang:1.14.4
-
-  rules:
-    - when: always
-
-  variables:
-    GITHUB_ROOT: "github.com/NVIDIA"
-    PROJECT_GOPATH: "${GITHUB_ROOT}/nvidia-container-toolkit"
-
-  before_script:
-    - mkdir -p ${GOPATH}/src/${GITHUB_ROOT}
-    - ln -s ${CI_PROJECT_DIR} ${GOPATH}/src/${PROJECT_GOPATH}
-
-.build-setup: &build-setup
-  image: docker:19.03.8
-
-  services:
-    - name: docker:19.03.8-dind
-      command: ["--experimental"]
+include:
+  - .common-ci.yml
 
+.build-setup:
   before_script:
   - apk update
   - apk upgrade
   - apk add coreutils build-base sed git bash make
   - docker run --rm --privileged multiarch/qemu-user-static --reset -p yes -c yes
 
-# Run a series of sanity-check tests over the code
-lint:
-  <<: *tests-setup
-  stage: tests
-  script:
-    - GO111MODULE=off go get -u golang.org/x/lint/golint
-    - make lint
-
-vet:
-  <<: *tests-setup
-  stage: tests
-  script:
-    - make vet
-
-unit_test:
-  <<: *tests-setup
-  stage: tests
-  script:
-    - make test
-
-fmt:
-  <<: *tests-setup
-  stage: tests
-  script:
-    - make assert-fmt
-
-ineffassign:
-  <<: *tests-setup
-  stage: tests
-  script:
-    - GO111MODULE=off go get -u github.com/gordonklaus/ineffassign
-    - make ineffassign
-
-misspell:
-  <<: *tests-setup
-  stage: tests
-  script:
-    - GO111MODULE=off go get -u github.com/client9/misspell/cmd/misspell
-    - make misspell
-
 # build-one jobs build packages for a single OS / ARCH combination.
 #
 # They are run during the first stage of the pipeline as a smoke test to ensure
 # that we can successfully build packages on all of our architectures for a
 # single OS. They are triggered on any change to an MR. No artifacts are
 # produced as part of build-one jobs.
-.build-one-setup: &build-one-setup
-  <<: *build-setup
-  stage: build-one
-  only:
-    - merge_requests
+.build-one-setup:
+  extends:
+    - .build-setup
+  stage: build
+  rules:
+    - if: $CI_MERGE_REQUEST_ID
 
 # build-all jobs build packages for every OS / ARCH combination we support.
 #
@@ -108,9 +45,10 @@ misspell:
 # OS / ARCH combinations, so this is optimized to only run once per MR
 # (assuming it all passes). A full set of artifacts including the packages
 # built for each OS / ARCH are produced as a result of these jobs.
-.build-all-setup: &build-all-setup
-  <<: *build-setup
-  stage: build-all
+.build-all-setup:
+  extends:
+    - .build-setup
+  stage: build-long
   timeout: 2h 30m
   rules:
     - if: $CI_COMMIT_TAG
@@ -131,43 +69,53 @@ misspell:
 # The full set of build-one jobs organizes to build
 # ubuntu18.04 in parallel on each of our supported ARCHs.
 build-one-amd64:
-  <<: *build-one-setup
+  extends:
+    - .build-one-setup
   script:
     - make ubuntu18.04-amd64
+  rules:
+    - when: always
 
 build-one-ppc64le:
-  <<: *build-one-setup
+  extends:
+    - .build-one-setup
   script:
     - make ubuntu18.04-ppc64le
 
 build-one-arm64:
-  <<: *build-one-setup
+  extends:
+    - .build-one-setup
   script:
     - make ubuntu18.04-arm64
 
 # The full set of build-all jobs organized to
 # have builds for each ARCH run in parallel.
 build-all-amd64:
-  <<: *build-all-setup
+  extends:
+    - .build-all-setup
   script:
     - make docker-amd64
 
 build-all-x86_64:
-  <<: *build-all-setup
+  extends:
+    - .build-all-setup
   script:
     - make docker-x86_64
 
 build-all-ppc64le:
-  <<: *build-all-setup
+  extends:
+    - .build-all-setup
   script:
     - make docker-ppc64le
 
 build-all-arm64:
-  <<: *build-all-setup
+  extends:
+    - .build-all-setup
   script:
     - make docker-arm64
 
 build-all-aarch64:
-  <<: *build-all-setup
+  extends:
+    - .build-all-setup
   script:
     - make docker-aarch64

.gitmodules

@@ -0,0 +1,9 @@
+[submodule "third_party/libnvidia-container"]
+	path = third_party/libnvidia-container
+	url = https://gitlab.com/nvidia/container-toolkit/libnvidia-container.git
+[submodule "third_party/nvidia-container-runtime"]
+	path = third_party/nvidia-container-runtime
+	url = https://gitlab.com/nvidia/container-toolkit/container-runtime.git
+[submodule "third_party/nvidia-docker"]
+	path = third_party/nvidia-docker
+	url = https://gitlab.com/nvidia/container-toolkit/nvidia-docker.git

DEVELOPMENT.md

@@ -0,0 +1,45 @@
+# NVIDIA Container Toolkit Release Tooling
+
+This repository allows for the components of the NVIDIA container stack to be
+built and released as the NVIDIA Container Toolkit from a single repository. The components:
+* `libnvidia-container`
+* `nvidia-container-runtime`
+* `nvidia-docker`
+are included as submodules in the `third_party` folder.
+
+The `nvidia-container-toolkit` resides in this repo directly.
+
+## Building
+
+In oder to build the packages, the following command is executed
+```sh
+./scripts/build-all-components.sh TARGET
+```
+where `TARGET` is a make target that is valid for each of the sub-components.
+
+These include:
+* `ubuntu18.04-amd64`
+* `centos8-x86_64`
+
+The packages are generated in the `dist` folder.
+
+## Testing local changes
+
+In oder to use the same build logic to be used to generate packages with local changes,
+the location of the individual components can be overridded using the: `LIBNVIDIA_CONTAINER_ROOT`,
+`NVIDIA_CONTAINER_TOOLKIT_ROOT`, `NVIDIA_CONTAINER_RUNTIME_ROOT`, and `NVIDIA_DOCKER_ROOT`
+environment variables.
+
+## Testing packages locally
+
+The [test/release](./test/release/) folder contains documentation on how the installation of local or staged packages can be tested.
+
+
+## Releasing
+
+A utility script [`scripts/release.sh`](./scripts/release.sh) is provided to build
+packages required for release. If run without arguments, all supported distribution-architecture combinations are built. A specific distribution-architecture pair can also be provided
+```sh
+./scripts/release.sh ubuntu18.04-amd64
+```
+where the `amd64` builds for `ubuntu18.04` are provided as an example.

Jenkinsfile

@@ -17,12 +17,15 @@
 podTemplate (cloud:'sw-gpu-cloudnative',
     containers: [
     containerTemplate(name: 'docker', image: 'docker:dind', ttyEnabled: true, privileged: true),
-    containerTemplate(name: 'golang', image: 'golang:1.14.2', ttyEnabled: true)
+    containerTemplate(name: 'golang', image: 'golang:1.16.3', ttyEnabled: true)
   ]) {
     node(POD_LABEL) {
+        def scmInfo
+
         stage('checkout') {
-            checkout scm
+            scmInfo = checkout(scm)
         }
+
         stage('dependencies') {
             container('golang') {
                 sh 'GO111MODULE=off go get -u github.com/client9/misspell/cmd/misspell'
@@ -30,7 +33,7 @@ podTemplate (cloud:'sw-gpu-cloudnative',
                 sh 'GO111MODULE=off go get -u golang.org/x/lint/golint'
             }
             container('docker') {
-                sh 'apk add --no-cache make bash'
+                sh 'apk add --no-cache make bash git'
             }
         }
         stage('check') {
@@ -43,15 +46,54 @@ podTemplate (cloud:'sw-gpu-cloudnative',
                 getGolangStages(["test"])
             )
         }
-        stage('build-one') {
-            parallel (
-                getSingleBuildForArchitectures(["amd64", "ppc64le", "arm64"])
-            )
+
+        def versionInfo
+        stage('version') {
+            container('docker') {
+                versionInfo = getVersionInfo(scmInfo)
+                println "versionInfo=${versionInfo}"
+            }
         }
-        stage('build-all') {
-            parallel (
-                getAllBuildForArchitectures(["amd64", "ppc64le", "arm64", "x86_64", "aarch64"])
-            )
+
+        def dist = 'ubuntu20.04'
+        def arch = 'amd64'
+        def stageLabel = "${dist}-${arch}"
+
+        stage('build-one') {
+            container('docker') {
+                stage (stageLabel) {
+                    sh "make ${dist}-${arch}"
+                }
+            }
+        }
+
+        stage('release') {
+            container('docker') {
+                stage (stageLabel) {
+
+                    def component = 'main'
+                    def repository = 'sw-gpu-cloudnative-debian-local/pool/main/'
+
+                    def uploadSpec = """{
+                                        "files":
+                                        [  {
+                                                "pattern": "./dist/${dist}/${arch}/*.deb",
+                                                "target": "${repository}",
+                                                "props": "deb.distribution=${dist};deb.component=${component};deb.architecture=${arch}"
+                                            }
+                                        ]
+                                    }"""
+
+                    sh "echo starting release with versionInfo=${versionInfo}"
+                    if (versionInfo.isTag) {
+                        // upload to artifactory repository
+                        def server = Artifactory.server 'sw-gpu-artifactory'
+                        server.upload spec: uploadSpec
+                    } else {
+                        sh "echo skipping release for non-tagged build"
+                    }
+                }
+            }
         }
     }
 }
@@ -66,35 +108,6 @@ def getGolangStages(def targets) {
     return stages
 }
 
-def getSingleBuildForArchitectures(def architectures) {
-    return getBuildStagesForArchitectures(architectures, "make", "ubuntu18.04")
-}
-
-def getAllBuildForArchitectures(def architectures) {
-    // TODO: For the time being we only echo the command for the "all" stages
-    return getBuildStagesForArchitectures(architectures, "echo make", "docker")
-}
-
-def getBuildStagesForArchitectures(def architectures, def makeCommand, def makeTargetPrefix) {
-    stages = [:]
-
-    for (a in architectures) {
-        stages[a] = getBuildClosure(a, makeCommand, "${makeTargetPrefix}-${a}")
-    }
-
-    return stages
-}
-
-def getBuildClosure(def architecture, def makeCommand, def makeTarget) {
-    return {
-        container('docker') {
-            stage(architecture) {
-                sh "${makeCommand} ${makeTarget}"
-            }
-        }
-    }
-}
-
 def getLintClosure(def target) {
     return {
         container('golang') {
@@ -104,3 +117,26 @@ def getLintClosure(def target) {
         }
     }
 }
+
+// getVersionInfo returns a hash of version info
+def getVersionInfo(def scmInfo) {
+    def versionInfo = [
+        isTag: isTag(scmInfo.GIT_BRANCH)
+    ]
+
+    scmInfo.each { k, v -> versionInfo[k] = v }
+    return versionInfo
+}
+
+def isTag(def branch) {
+    if (!branch.startsWith('v')) {
+        return false
+    }
+
+    def version = shOutput('git describe --all --exact-match --always')
+    return version == "tags/${branch}"
+}
+
+def shOuptut(def script) {
+    return sh(script: script, returnStdout: true).trim()
+}

Makefile

@@ -17,23 +17,61 @@ MKDIR    ?= mkdir
 DIST_DIR ?= $(CURDIR)/dist
 
 LIB_NAME := nvidia-container-toolkit
-LIB_VERSION := 1.5.0
-LIB_TAG ?=
+LIB_VERSION := 1.6.0
+LIB_TAG ?= rc.1
 
-GOLANG_VERSION := 1.14.2
-GOLANG_PKG_PATH := github.com/NVIDIA/nvidia-container-toolkit/pkg
+GOLANG_VERSION := 1.16.3
+MODULE := github.com/NVIDIA/nvidia-container-toolkit
 
 # By default run all native docker-based targets
 docker-native:
 include $(CURDIR)/docker/docker.mk
 
-binary:
-	go build -ldflags "-s -w" -o "$(LIB_NAME)" $(GOLANG_PKG_PATH)
+ifeq ($(IMAGE_NAME),)
+REGISTRY ?= nvidia
+IMAGE_NAME = $(REGISTRY)/container-toolkit
+endif
 
-# Define the check targets for the Golang codebase
-MODULE := .
-.PHONY: check fmt assert-fmt ineffassign lint misspell vet
-check: assert-fmt lint misspell vet
+BUILDIMAGE_TAG ?= golang$(GOLANG_VERSION)
+BUILDIMAGE ?= $(IMAGE_NAME)-build:$(BUILDIMAGE_TAG)
+
+EXAMPLES := $(patsubst ./examples/%/,%,$(sort $(dir $(wildcard ./examples/*/))))
+EXAMPLE_TARGETS := $(patsubst %,example-%, $(EXAMPLES))
+
+CMDS := $(patsubst ./cmd/%/,%,$(sort $(dir $(wildcard ./cmd/*/))))
+CMD_TARGETS := $(patsubst %,cmd-%, $(CMDS))
+
+$(info CMD_TARGETS=$(CMD_TARGETS))
+
+CHECK_TARGETS := assert-fmt vet lint ineffassign misspell
+MAKE_TARGETS := binaries build check fmt lint-internal test examples cmds coverage generate $(CHECK_TARGETS)
+
+TARGETS := $(MAKE_TARGETS) $(EXAMPLE_TARGETS) $(CMD_TARGETS)
+
+DOCKER_TARGETS := $(patsubst %,docker-%, $(TARGETS))
+.PHONY: $(TARGETS) $(DOCKER_TARGETS)
+
+GOOS ?= linux
+
+binaries: cmds
+ifneq ($(PREFIX),)
+cmd-%: COMMAND_BUILD_OPTIONS = -o $(PREFIX)/$(*)
+endif
+cmds: $(CMD_TARGETS)
+$(CMD_TARGETS): cmd-%:
+	GOOS=$(GOOS) go build -ldflags "-s -w" $(COMMAND_BUILD_OPTIONS) $(MODULE)/cmd/$(*)
+
+build:
+	GOOS=$(GOOS) go build ./...
+
+examples: $(EXAMPLE_TARGETS)
+$(EXAMPLE_TARGETS): example-%:
+	GOOS=$(GOOS) go build ./examples/$(*)
+
+all: check test build binary
+check: $(CHECK_TARGETS)
+
+# Apply go fmt to the codebase
 fmt:
 	go list -f '{{.Dir}}' $(MODULE)/... \
 		| xargs gofmt -s -l -w
@@ -54,8 +92,12 @@ ineffassign:
 	ineffassign $(MODULE)/...
 
 lint:
-	# We use `go list -f '{{.Dir}}' $(GOLANG_PKG_PATH)/...` to skip the `vendor` folder.
-	go list -f '{{.Dir}}' $(MODULE)/... | xargs golint -set_exit_status
+# We use `go list -f '{{.Dir}}' $(MODULE)/...` to skip the `vendor` folder.
+	go list -f '{{.Dir}}' $(MODULE)/... | grep -v /internal/ | xargs golint -set_exit_status
+
+lint-internal:
+# We use `go list -f '{{.Dir}}' $(MODULE)/...` to skip the `vendor` folder.
+	go list -f '{{.Dir}}' $(MODULE)/internal/... | xargs golint -set_exit_status
 
 misspell:
 	misspell $(MODULE)/...
@@ -63,5 +105,43 @@ misspell:
 vet:
 	go vet $(MODULE)/...
 
-test:
-	go test $(MODULE)/...
+COVERAGE_FILE := coverage.out
+test: build cmds
+	go test -v -coverprofile=$(COVERAGE_FILE) $(MODULE)/...
+
+coverage: test
+	cat $(COVERAGE_FILE) | grep -v "_mock.go" > $(COVERAGE_FILE).no-mocks
+	go tool cover -func=$(COVERAGE_FILE).no-mocks
+
+generate:
+	go generate $(MODULE)/...
+
+# Generate an image for containerized builds
+# Note: This image is local only
+.PHONY: .build-image .pull-build-image .push-build-image
+.build-image: docker/Dockerfile.devel
+	if [ x"$(SKIP_IMAGE_BUILD)" = x"" ]; then \
+		$(DOCKER) build \
+			--progress=plain \
+			--build-arg GOLANG_VERSION="$(GOLANG_VERSION)" \
+			--tag $(BUILDIMAGE) \
+			-f $(^) \
+			docker; \
+	fi
+
+.pull-build-image:
+	$(DOCKER) pull $(BUILDIMAGE)
+
+.push-build-image:
+	$(DOCKER) push $(BUILDIMAGE)
+
+$(DOCKER_TARGETS): docker-%: .build-image
+	@echo "Running 'make $(*)' in docker container $(BUILDIMAGE)"
+	$(DOCKER) run \
+		--rm \
+		-e GOCACHE=/tmp/.cache \
+		-v $(PWD):$(PWD) \
+		-w $(PWD) \
+		--user $$(id -u):$$(id -g) \
+		$(BUILDIMAGE) \
+			make $(*)

README.md

@@ -0,0 +1,31 @@
+# NVIDIA Container Toolkit
+
+[![GitHub license](https://img.shields.io/github/license/NVIDIA/nvidia-container-toolkit?style=flat-square)](https://raw.githubusercontent.com/NVIDIA/nvidia-container-toolkit/master/LICENSE)
+[![Documentation](https://img.shields.io/badge/documentation-wiki-blue.svg?style=flat-square)](https://docs.nvidia.com/datacenter/cloud-native/container-toolkit/overview.html)
+[![Package repository](https://img.shields.io/badge/packages-repository-b956e8.svg?style=flat-square)](https://nvidia.github.io/libnvidia-container)
+
+![nvidia-container-stack](https://cloud.githubusercontent.com/assets/3028125/12213714/5b208976-b632-11e5-8406-38d379ec46aa.png)
+
+## Introduction
+
+The NVIDIA Container Toolkit allows users to build and run GPU accelerated containers. The toolkit includes a container runtime [library](https://github.com/NVIDIA/libnvidia-container) and utilities to automatically configure containers to leverage NVIDIA GPUs.
+
+Product documentation including an architecture overview, platform support, and installation and usage guides can be found in the [documentation repository](https://docs.nvidia.com/datacenter/cloud-native/container-toolkit/overview.html).
+
+## Getting Started
+
+**Make sure you have installed the [NVIDIA driver](https://docs.nvidia.com/datacenter/cloud-native/container-toolkit/install-guide.html#nvidia-drivers) for your Linux Distribution**
+**Note that you do not need to install the CUDA Toolkit on the host system, but the NVIDIA driver needs to be installed**
+
+For instructions on getting started with the NVIDIA Container Toolkit, refer to the [installation guide](https://docs.nvidia.com/datacenter/cloud-native/container-toolkit/install-guide.html#installation-guide).
+
+## Usage
+
+The [user guide](https://docs.nvidia.com/datacenter/cloud-native/container-toolkit/user-guide.html) provides information on the configuration and command line options available when running GPU containers with Docker.
+
+## Issues and Contributing
+
+[Checkout the Contributing document!](CONTRIBUTING.md)
+
+* Please let us know by [filing a new issue](https://github.com/NVIDIA/nvidia-container-toolkit/issues/new)
+* You can contribute by creating a [merge request](https://gitlab.com/nvidia/container-toolkit/container-toolkit/-/merge_requests/new) to our public GitLab repository

cmd/nvidia-container-runtime/logger.go

@@ -0,0 +1,79 @@
+/*
+# Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+*/
+
+package main
+
+import (
+	"fmt"
+	"io"
+	"os"
+
+	"github.com/sirupsen/logrus"
+	"github.com/tsaikd/KDGoLib/logrusutil"
+)
+
+// Logger adds a way to manage output to a log file to a logrus.Logger
+type Logger struct {
+	*logrus.Logger
+	previousOutput io.Writer
+	logFile        *os.File
+}
+
+// NewLogger constructs a Logger with a preddefined formatter
+func NewLogger() *Logger {
+	logrusLogger := logrus.New()
+
+	formatter := &logrusutil.ConsoleLogFormatter{
+		TimestampFormat: "2006/01/02 15:04:07",
+		Flag:            logrusutil.Ltime,
+	}
+
+	logger := &Logger{
+		Logger: logrusLogger,
+	}
+	logger.SetFormatter(formatter)
+
+	return logger
+}
+
+// LogToFile opens the specified file for appending and sets the logger to
+// output to the opened file. A reference to the file pointer is stored to
+// allow this to be closed.
+func (l *Logger) LogToFile(filename string) error {
+	logFile, err := os.OpenFile(filename, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
+	if err != nil {
+		return fmt.Errorf("error opening debug log file: %v", err)
+	}
+
+	l.logFile = logFile
+	l.previousOutput = l.Out
+	l.SetOutput(logFile)
+
+	return nil
+}
+
+// CloseFile closes the log file (if any) and resets the logger output to what it
+// was before LogToFile was called.
+func (l *Logger) CloseFile() error {
+	if l.logFile == nil {
+		return nil
+	}
+	logFile := l.logFile
+	l.SetOutput(l.previousOutput)
+	l.logFile = nil
+
+	return logFile.Close()
+}

cmd/nvidia-container-runtime/main.go

@@ -0,0 +1,89 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"path"
+
+	"github.com/pelletier/go-toml"
+)
+
+const (
+	configOverride = "XDG_CONFIG_HOME"
+	configFilePath = "nvidia-container-runtime/config.toml"
+
+	hookDefaultFilePath = "/usr/bin/nvidia-container-runtime-hook"
+)
+
+var (
+	configDir = "/etc/"
+)
+
+var logger = NewLogger()
+
+func main() {
+	err := run(os.Args)
+	if err != nil {
+		logger.Errorf("Error running %v: %v", os.Args, err)
+		os.Exit(1)
+	}
+}
+
+// run is an entry point that allows for idiomatic handling of errors
+// when calling from the main function.
+func run(argv []string) (err error) {
+	cfg, err := getConfig()
+	if err != nil {
+		return fmt.Errorf("error loading config: %v", err)
+	}
+
+	err = logger.LogToFile(cfg.debugFilePath)
+	if err != nil {
+		return fmt.Errorf("error opening debug log file: %v", err)
+	}
+	defer func() {
+		// We capture and log a returning error before closing the log file.
+		if err != nil {
+			logger.Errorf("Error running %v: %v", argv, err)
+		}
+		logger.CloseFile()
+	}()
+
+	r, err := newRuntime(argv)
+	if err != nil {
+		return fmt.Errorf("error creating runtime: %v", err)
+	}
+
+	logger.Printf("Running %s\n", argv[0])
+	return r.Exec(argv)
+}
+
+type config struct {
+	debugFilePath string
+}
+
+// getConfig sets up the config struct. Values are read from a toml file
+// or set via the environment.
+func getConfig() (*config, error) {
+	cfg := &config{}
+
+	if XDGConfigDir := os.Getenv(configOverride); len(XDGConfigDir) != 0 {
+		configDir = XDGConfigDir
+	}
+
+	configFilePath := path.Join(configDir, configFilePath)
+
+	tomlContent, err := os.ReadFile(configFilePath)
+	if err != nil {
+		return nil, err
+	}
+
+	toml, err := toml.Load(string(tomlContent))
+	if err != nil {
+		return nil, err
+	}
+
+	cfg.debugFilePath = toml.GetDefault("nvidia-container-runtime.debug", "/dev/null").(string)
+
+	return cfg, nil
+}

cmd/nvidia-container-runtime/main_test.go

@@ -0,0 +1,293 @@
+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"runtime"
+	"strings"
+	"testing"
+
+	"github.com/opencontainers/runtime-spec/specs-go"
+	"github.com/stretchr/testify/require"
+)
+
+const (
+	nvidiaRuntime            = "nvidia-container-runtime"
+	nvidiaHook               = "nvidia-container-runtime-hook"
+	bundlePathSuffix         = "test/output/bundle/"
+	specFile                 = "config.json"
+	unmodifiedSpecFileSuffix = "test/input/test_spec.json"
+)
+
+type testConfig struct {
+	root    string
+	binPath string
+}
+
+var cfg *testConfig
+
+func TestMain(m *testing.M) {
+	// TEST SETUP
+	// Determine the module root and the test binary path
+	var err error
+	moduleRoot, err := getModuleRoot()
+	if err != nil {
+		logger.Fatalf("error in test setup: could not get module root: %v", err)
+	}
+	testBinPath := filepath.Join(moduleRoot, "test", "bin")
+	testInputPath := filepath.Join(moduleRoot, "test", "input")
+
+	// Set the environment variables for the test
+	os.Setenv("PATH", prependToPath(testBinPath, moduleRoot))
+	os.Setenv("XDG_CONFIG_HOME", testInputPath)
+
+	// Confirm that the environment is configured correctly
+	runcPath, err := exec.LookPath(runcExecutableName)
+	if err != nil || filepath.Join(testBinPath, runcExecutableName) != runcPath {
+		logger.Fatalf("error in test setup: mock runc path set incorrectly in TestMain(): %v", err)
+	}
+	hookPath, err := exec.LookPath(nvidiaHook)
+	if err != nil || filepath.Join(testBinPath, nvidiaHook) != hookPath {
+		logger.Fatalf("error in test setup: mock hook path set incorrectly in TestMain(): %v", err)
+	}
+
+	// Store the root and binary paths in the test Config
+	cfg = &testConfig{
+		root:    moduleRoot,
+		binPath: testBinPath,
+	}
+
+	// RUN TESTS
+	exitCode := m.Run()
+
+	// TEST CLEANUP
+	os.Remove(specFile)
+
+	os.Exit(exitCode)
+}
+
+func getModuleRoot() (string, error) {
+	_, filename, _, _ := runtime.Caller(0)
+
+	return hasGoMod(filename)
+}
+
+func hasGoMod(dir string) (string, error) {
+	if dir == "" || dir == "/" {
+		return "", fmt.Errorf("module root not found")
+	}
+
+	_, err := os.Stat(filepath.Join(dir, "go.mod"))
+	if err != nil {
+		return hasGoMod(filepath.Dir(dir))
+	}
+	return dir, nil
+}
+
+func prependToPath(additionalPaths ...string) string {
+	paths := strings.Split(os.Getenv("PATH"), ":")
+	paths = append(additionalPaths, paths...)
+
+	return strings.Join(paths, ":")
+}
+
+// case 1) nvidia-container-runtime run --bundle
+// case 2) nvidia-container-runtime create --bundle
+//		- Confirm the runtime handles bad input correctly
+func TestBadInput(t *testing.T) {
+	err := cfg.generateNewRuntimeSpec()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	cmdRun := exec.Command(nvidiaRuntime, "run", "--bundle")
+	t.Logf("executing: %s\n", strings.Join(cmdRun.Args, " "))
+	output, err := cmdRun.CombinedOutput()
+	require.Errorf(t, err, "runtime should return an error", "output=%v", string(output))
+
+	cmdCreate := exec.Command(nvidiaRuntime, "create", "--bundle")
+	t.Logf("executing: %s\n", strings.Join(cmdCreate.Args, " "))
+	err = cmdCreate.Run()
+	require.Error(t, err, "runtime should return an error")
+}
+
+// case 1) nvidia-container-runtime run --bundle <bundle-name> <ctr-name>
+//		- Confirm the runtime runs with no errors
+// case 2) nvidia-container-runtime create --bundle <bundle-name> <ctr-name>
+//		- Confirm the runtime inserts the NVIDIA prestart hook correctly
+func TestGoodInput(t *testing.T) {
+	err := cfg.generateNewRuntimeSpec()
+	if err != nil {
+		t.Fatalf("error generating runtime spec: %v", err)
+	}
+
+	cmdRun := exec.Command(nvidiaRuntime, "run", "--bundle", cfg.bundlePath(), "testcontainer")
+	t.Logf("executing: %s\n", strings.Join(cmdRun.Args, " "))
+	output, err := cmdRun.CombinedOutput()
+	require.NoErrorf(t, err, "runtime should not return an error", "output=%v", string(output))
+
+	// Check config.json and confirm there are no hooks
+	spec, err := cfg.getRuntimeSpec()
+	require.NoError(t, err, "should be no errors when reading and parsing spec from config.json")
+	require.Empty(t, spec.Hooks, "there should be no hooks in config.json")
+
+	cmdCreate := exec.Command(nvidiaRuntime, "create", "--bundle", cfg.bundlePath(), "testcontainer")
+	t.Logf("executing: %s\n", strings.Join(cmdCreate.Args, " "))
+	err = cmdCreate.Run()
+	require.NoError(t, err, "runtime should not return an error")
+
+	// Check config.json for NVIDIA prestart hook
+	spec, err = cfg.getRuntimeSpec()
+	require.NoError(t, err, "should be no errors when reading and parsing spec from config.json")
+	require.NotEmpty(t, spec.Hooks, "there should be hooks in config.json")
+	require.Equal(t, 1, nvidiaHookCount(spec.Hooks), "exactly one nvidia prestart hook should be inserted correctly into config.json")
+}
+
+// NVIDIA prestart hook already present in config file
+func TestDuplicateHook(t *testing.T) {
+	err := cfg.generateNewRuntimeSpec()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	var spec specs.Spec
+	spec, err = cfg.getRuntimeSpec()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	t.Logf("inserting nvidia prestart hook to config.json")
+	if err = addNVIDIAHook(&spec); err != nil {
+		t.Fatal(err)
+	}
+
+	jsonOutput, err := json.MarshalIndent(spec, "", "\t")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	jsonFile, err := os.OpenFile(cfg.specFilePath(), os.O_RDWR, 0644)
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = jsonFile.WriteAt(jsonOutput, 0)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Test how runtime handles already existing prestart hook in config.json
+	cmdCreate := exec.Command(nvidiaRuntime, "create", "--bundle", cfg.bundlePath(), "testcontainer")
+	t.Logf("executing: %s\n", strings.Join(cmdCreate.Args, " "))
+	output, err := cmdCreate.CombinedOutput()
+	require.NoErrorf(t, err, "runtime should not return an error", "output=%v", string(output))
+
+	// Check config.json for NVIDIA prestart hook
+	spec, err = cfg.getRuntimeSpec()
+	require.NoError(t, err, "should be no errors when reading and parsing spec from config.json")
+	require.NotEmpty(t, spec.Hooks, "there should be hooks in config.json")
+	require.Equal(t, 1, nvidiaHookCount(spec.Hooks), "exactly one nvidia prestart hook should be inserted correctly into config.json")
+}
+
+// addNVIDIAHook is a basic wrapper for nvidiaContainerRunime.addNVIDIAHook that is used for
+// testing.
+func addNVIDIAHook(spec *specs.Spec) error {
+	r := nvidiaContainerRuntime{logger: logger.Logger}
+	return r.addNVIDIAHook(spec)
+}
+
+func (c testConfig) getRuntimeSpec() (specs.Spec, error) {
+	filePath := c.specFilePath()
+
+	var spec specs.Spec
+	jsonFile, err := os.OpenFile(filePath, os.O_RDWR, 0644)
+	if err != nil {
+		return spec, err
+	}
+	defer jsonFile.Close()
+
+	jsonContent, err := ioutil.ReadAll(jsonFile)
+	if err != nil {
+		return spec, err
+	} else if json.Valid(jsonContent) {
+		err = json.Unmarshal(jsonContent, &spec)
+		if err != nil {
+			return spec, err
+		}
+	} else {
+		err = json.NewDecoder(bytes.NewReader(jsonContent)).Decode(&spec)
+		if err != nil {
+			return spec, err
+		}
+	}
+
+	return spec, err
+}
+
+func (c testConfig) bundlePath() string {
+	return filepath.Join(c.root, bundlePathSuffix)
+}
+
+func (c testConfig) specFilePath() string {
+	return filepath.Join(c.bundlePath(), specFile)
+}
+
+func (c testConfig) unmodifiedSpecFile() string {
+	return filepath.Join(c.root, unmodifiedSpecFileSuffix)
+}
+
+func (c testConfig) generateNewRuntimeSpec() error {
+	var err error
+
+	err = os.MkdirAll(c.bundlePath(), 0755)
+	if err != nil {
+		return err
+	}
+
+	cmd := exec.Command("cp", c.unmodifiedSpecFile(), c.specFilePath())
+	err = cmd.Run()
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+// Return number of valid NVIDIA prestart hooks in runtime spec
+func nvidiaHookCount(hooks *specs.Hooks) int {
+	if hooks == nil {
+		return 0
+	}
+
+	count := 0
+	for _, hook := range hooks.Prestart {
+		if strings.Contains(hook.Path, nvidiaHook) {
+			count++
+		}
+	}
+	return count
+}
+
+func TestGetConfigWithCustomConfig(t *testing.T) {
+	wd, err := os.Getwd()
+	require.NoError(t, err)
+
+	// By default debug is disabled
+	contents := []byte("[nvidia-container-runtime]\ndebug = \"/nvidia-container-toolkit.log\"")
+	testDir := filepath.Join(wd, "test")
+	filename := filepath.Join(testDir, configFilePath)
+
+	os.Setenv(configOverride, testDir)
+
+	require.NoError(t, os.MkdirAll(filepath.Dir(filename), 0766))
+	require.NoError(t, ioutil.WriteFile(filename, contents, 0766))
+
+	defer func() { require.NoError(t, os.RemoveAll(testDir)) }()
+
+	cfg, err := getConfig()
+	require.NoError(t, err)
+	require.Equal(t, cfg.debugFilePath, "/nvidia-container-toolkit.log")
+}

cmd/nvidia-container-runtime/nvcr.go

@@ -0,0 +1,145 @@
+/*
+# Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+*/
+
+package main
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+
+	"github.com/NVIDIA/nvidia-container-toolkit/internal/oci"
+	"github.com/opencontainers/runtime-spec/specs-go"
+	log "github.com/sirupsen/logrus"
+)
+
+// nvidiaContainerRuntime encapsulates the NVIDIA Container Runtime. It wraps the specified runtime, conditionally
+// modifying the specified OCI specification before invoking the runtime.
+type nvidiaContainerRuntime struct {
+	logger  *log.Logger
+	runtime oci.Runtime
+	ociSpec oci.Spec
+}
+
+var _ oci.Runtime = (*nvidiaContainerRuntime)(nil)
+
+// newNvidiaContainerRuntime is a constructor for a standard runtime shim.
+func newNvidiaContainerRuntimeWithLogger(logger *log.Logger, runtime oci.Runtime, ociSpec oci.Spec) (oci.Runtime, error) {
+	r := nvidiaContainerRuntime{
+		logger:  logger,
+		runtime: runtime,
+		ociSpec: ociSpec,
+	}
+
+	return &r, nil
+}
+
+// Exec defines the entrypoint for the NVIDIA Container Runtime. A check is performed to see whether modifications
+// to the OCI spec are required -- and applicable modifcations applied. The supplied arguments are then
+// forwarded to the underlying runtime's Exec method.
+func (r nvidiaContainerRuntime) Exec(args []string) error {
+	if r.modificationRequired(args) {
+		err := r.modifyOCISpec()
+		if err != nil {
+			return fmt.Errorf("error modifying OCI spec: %v", err)
+		}
+	}
+
+	r.logger.Println("Forwarding command to runtime")
+	return r.runtime.Exec(args)
+}
+
+// modificationRequired checks the intput arguments to determine whether a modification
+// to the OCI spec is required.
+func (r nvidiaContainerRuntime) modificationRequired(args []string) bool {
+	var previousWasBundle bool
+	for _, a := range args {
+		// We check for '--bundle create' explicitly to ensure that we
+		// don't inadvertently trigger a modification if the bundle directory
+		// is specified as `create`
+		if !previousWasBundle && isBundleFlag(a) {
+			previousWasBundle = true
+			continue
+		}
+
+		if !previousWasBundle && a == "create" {
+			r.logger.Infof("'create' command detected; modification required")
+			return true
+		}
+
+		previousWasBundle = false
+	}
+
+	r.logger.Infof("No modification required")
+	return false
+}
+
+// modifyOCISpec loads and modifies the OCI spec specified in the nvidiaContainerRuntime
+// struct. The spec is modified in-place and written to the same file as the input after
+// modifcationas are applied.
+func (r nvidiaContainerRuntime) modifyOCISpec() error {
+	err := r.ociSpec.Load()
+	if err != nil {
+		return fmt.Errorf("error loading OCI specification for modification: %v", err)
+	}
+
+	err = r.ociSpec.Modify(r.addNVIDIAHook)
+	if err != nil {
+		return fmt.Errorf("error injecting NVIDIA Container Runtime hook: %v", err)
+	}
+
+	err = r.ociSpec.Flush()
+	if err != nil {
+		return fmt.Errorf("error writing modified OCI specification: %v", err)
+	}
+	return nil
+}
+
+// addNVIDIAHook modifies the specified OCI specification in-place, inserting a
+// prestart hook.
+func (r nvidiaContainerRuntime) addNVIDIAHook(spec *specs.Spec) error {
+	path, err := exec.LookPath("nvidia-container-runtime-hook")
+	if err != nil {
+		path = hookDefaultFilePath
+		_, err = os.Stat(path)
+		if err != nil {
+			return err
+		}
+	}
+
+	r.logger.Printf("prestart hook path: %s\n", path)
+
+	args := []string{path}
+	if spec.Hooks == nil {
+		spec.Hooks = &specs.Hooks{}
+	} else if len(spec.Hooks.Prestart) != 0 {
+		for _, hook := range spec.Hooks.Prestart {
+			if !strings.Contains(hook.Path, "nvidia-container-runtime-hook") {
+				continue
+			}
+			r.logger.Println("existing nvidia prestart hook in OCI spec file")
+			return nil
+		}
+	}
+
+	spec.Hooks.Prestart = append(spec.Hooks.Prestart, specs.Hook{
+		Path: path,
+		Args: append(args, "prestart"),
+	})
+
+	return nil
+}

cmd/nvidia-container-runtime/nvcr_test.go

@@ -0,0 +1,230 @@
+/*
+# Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+*/
+
+package main
+
+import (
+	"fmt"
+	"os"
+	"strings"
+	"testing"
+
+	"github.com/NVIDIA/nvidia-container-toolkit/internal/oci"
+	"github.com/opencontainers/runtime-spec/specs-go"
+	testlog "github.com/sirupsen/logrus/hooks/test"
+	"github.com/stretchr/testify/require"
+)
+
+func TestArgsGetConfigFilePath(t *testing.T) {
+	wd, err := os.Getwd()
+	require.NoError(t, err)
+
+	testCases := []struct {
+		bundleDir   string
+		ociSpecPath string
+	}{
+		{
+			ociSpecPath: fmt.Sprintf("%v/config.json", wd),
+		},
+		{
+			bundleDir:   "/foo/bar",
+			ociSpecPath: "/foo/bar/config.json",
+		},
+		{
+			bundleDir:   "/foo/bar/",
+			ociSpecPath: "/foo/bar/config.json",
+		},
+	}
+
+	for i, tc := range testCases {
+		cp, err := getOCISpecFilePath(tc.bundleDir)
+
+		require.NoErrorf(t, err, "%d: %v", i, tc)
+		require.Equalf(t, tc.ociSpecPath, cp, "%d: %v", i, tc)
+	}
+}
+
+func TestAddNvidiaHook(t *testing.T) {
+	logger, logHook := testlog.NewNullLogger()
+	shim := nvidiaContainerRuntime{
+		logger: logger,
+	}
+
+	testCases := []struct {
+		spec         *specs.Spec
+		errorPrefix  string
+		shouldNotAdd bool
+	}{
+		{
+			spec: &specs.Spec{},
+		},
+		{
+			spec: &specs.Spec{
+				Hooks: &specs.Hooks{},
+			},
+		},
+		{
+			spec: &specs.Spec{
+				Hooks: &specs.Hooks{
+					Prestart: []specs.Hook{{
+						Path: "some-hook",
+					}},
+				},
+			},
+		},
+		{
+			spec: &specs.Spec{
+				Hooks: &specs.Hooks{
+					Prestart: []specs.Hook{{
+						Path: "nvidia-container-runtime-hook",
+					}},
+				},
+			},
+			shouldNotAdd: true,
+		},
+	}
+
+	for i, tc := range testCases {
+		logHook.Reset()
+
+		var numPrestartHooks int
+		if tc.spec.Hooks != nil {
+			numPrestartHooks = len(tc.spec.Hooks.Prestart)
+		}
+
+		err := shim.addNVIDIAHook(tc.spec)
+
+		if tc.errorPrefix == "" {
+			require.NoErrorf(t, err, "%d: %v", i, tc)
+		} else {
+			require.Truef(t, strings.HasPrefix(err.Error(), tc.errorPrefix), "%d: %v", i, tc)
+
+			require.NotNilf(t, tc.spec.Hooks, "%d: %v", i, tc)
+			require.Equalf(t, 1, nvidiaHookCount(tc.spec.Hooks), "%d: %v", i, tc)
+
+			if tc.shouldNotAdd {
+				require.Equal(t, numPrestartHooks+1, len(tc.spec.Hooks.Poststart), "%d: %v", i, tc)
+			} else {
+				require.Equal(t, numPrestartHooks+1, len(tc.spec.Hooks.Poststart), "%d: %v", i, tc)
+
+				nvidiaHook := tc.spec.Hooks.Poststart[len(tc.spec.Hooks.Poststart)-1]
+
+				// TODO: This assumes that the hook has been set up in the makefile
+				expectedPath := "/usr/bin/nvidia-container-runtime-hook"
+				require.Equalf(t, expectedPath, nvidiaHook.Path, "%d: %v", i, tc)
+				require.Equalf(t, []string{expectedPath, "prestart"}, nvidiaHook.Args, "%d: %v", i, tc)
+				require.Emptyf(t, nvidiaHook.Env, "%d: %v", i, tc)
+				require.Nilf(t, nvidiaHook.Timeout, "%d: %v", i, tc)
+			}
+		}
+	}
+}
+
+func TestNvidiaContainerRuntime(t *testing.T) {
+	logger, hook := testlog.NewNullLogger()
+
+	testCases := []struct {
+		shim         nvidiaContainerRuntime
+		shouldModify bool
+		args         []string
+		modifyError  error
+		writeError   error
+	}{
+		{
+			shim:         nvidiaContainerRuntime{},
+			shouldModify: false,
+		},
+		{
+			shim:         nvidiaContainerRuntime{},
+			args:         []string{"create"},
+			shouldModify: true,
+		},
+		{
+			shim:         nvidiaContainerRuntime{},
+			args:         []string{"--bundle=create"},
+			shouldModify: false,
+		},
+		{
+			shim:         nvidiaContainerRuntime{},
+			args:         []string{"--bundle", "create"},
+			shouldModify: false,
+		},
+		{
+			shim:         nvidiaContainerRuntime{},
+			args:         []string{"create"},
+			shouldModify: true,
+		},
+		{
+			shim:         nvidiaContainerRuntime{},
+			args:         []string{"create"},
+			modifyError:  fmt.Errorf("error modifying"),
+			shouldModify: true,
+		},
+		{
+			shim:         nvidiaContainerRuntime{},
+			args:         []string{"create"},
+			writeError:   fmt.Errorf("error writing"),
+			shouldModify: true,
+		},
+	}
+
+	for i, tc := range testCases {
+		tc.shim.logger = logger
+		hook.Reset()
+
+		spec := &specs.Spec{}
+		ociMock := oci.NewMockSpec(spec, tc.writeError, tc.modifyError)
+
+		require.Equal(t, tc.shouldModify, tc.shim.modificationRequired(tc.args), "%d: %v", i, tc)
+
+		tc.shim.ociSpec = ociMock
+		tc.shim.runtime = &MockShim{}
+
+		err := tc.shim.Exec(tc.args)
+		if tc.modifyError != nil || tc.writeError != nil {
+			require.Error(t, err, "%d: %v", i, tc)
+		} else {
+			require.NoError(t, err, "%d: %v", i, tc)
+		}
+
+		if tc.shouldModify {
+			require.Equal(t, 1, ociMock.MockModify.Callcount, "%d: %v", i, tc)
+			require.Equal(t, 1, nvidiaHookCount(spec.Hooks), "%d: %v", i, tc)
+		} else {
+			require.Equal(t, 0, ociMock.MockModify.Callcount, "%d: %v", i, tc)
+			require.Nil(t, spec.Hooks, "%d: %v", i, tc)
+		}
+
+		writeExpected := tc.shouldModify && tc.modifyError == nil
+		if writeExpected {
+			require.Equal(t, 1, ociMock.MockFlush.Callcount, "%d: %v", i, tc)
+		} else {
+			require.Equal(t, 0, ociMock.MockFlush.Callcount, "%d: %v", i, tc)
+		}
+	}
+}
+
+type MockShim struct {
+	called      bool
+	args        []string
+	returnError error
+}
+
+func (m *MockShim) Exec(args []string) error {
+	m.called = true
+	m.args = args
+	return m.returnError
+}

cmd/nvidia-container-runtime/runtime_factory.go

@@ -0,0 +1,176 @@
+/*
+# Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+*/
+
+package main
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+
+	"github.com/NVIDIA/nvidia-container-toolkit/internal/oci"
+)
+
+const (
+	ociSpecFileName          = "config.json"
+	dockerRuncExecutableName = "docker-runc"
+	runcExecutableName       = "runc"
+)
+
+// newRuntime is a factory method that constructs a runtime based on the selected configuration.
+func newRuntime(argv []string) (oci.Runtime, error) {
+	ociSpec, err := newOCISpec(argv)
+	if err != nil {
+		return nil, fmt.Errorf("error constructing OCI specification: %v", err)
+	}
+
+	runc, err := newRuncRuntime()
+	if err != nil {
+		return nil, fmt.Errorf("error constructing runc runtime: %v", err)
+	}
+
+	r, err := newNvidiaContainerRuntimeWithLogger(logger.Logger, runc, ociSpec)
+	if err != nil {
+		return nil, fmt.Errorf("error constructing NVIDIA Container Runtime: %v", err)
+	}
+
+	return r, nil
+}
+
+// newOCISpec constructs an OCI spec for the provided arguments
+func newOCISpec(argv []string) (oci.Spec, error) {
+	bundlePath, err := getBundlePath(argv)
+	if err != nil {
+		return nil, fmt.Errorf("error parsing command line arguments: %v", err)
+	}
+
+	ociSpecPath, err := getOCISpecFilePath(bundlePath)
+	if err != nil {
+		return nil, fmt.Errorf("error getting OCI specification file path: %v", err)
+	}
+	ociSpec := oci.NewSpecFromFile(ociSpecPath)
+
+	return ociSpec, nil
+}
+
+// newRuncRuntime locates the runc binary and wraps it in a SyscallExecRuntime
+func newRuncRuntime() (oci.Runtime, error) {
+	runtimePath, err := findRunc()
+	if err != nil {
+		return nil, fmt.Errorf("error locating runtime: %v", err)
+	}
+
+	runc, err := oci.NewSyscallExecRuntimeWithLogger(logger.Logger, runtimePath)
+	if err != nil {
+		return nil, fmt.Errorf("error constructing runtime: %v", err)
+	}
+
+	return runc, nil
+}
+
+// getBundlePath checks the specified slice of strings (argv) for a 'bundle' flag as allowed by runc.
+// The following are supported:
+// --bundle{{SEP}}BUNDLE_PATH
+// -bundle{{SEP}}BUNDLE_PATH
+// -b{{SEP}}BUNDLE_PATH
+// where {{SEP}} is either ' ' or '='
+func getBundlePath(argv []string) (string, error) {
+	var bundlePath string
+
+	for i := 0; i < len(argv); i++ {
+		param := argv[i]
+
+		parts := strings.SplitN(param, "=", 2)
+		if !isBundleFlag(parts[0]) {
+			continue
+		}
+
+		// The flag has the format --bundle=/path
+		if len(parts) == 2 {
+			bundlePath = parts[1]
+			continue
+		}
+
+		// The flag has the format --bundle /path
+		if i+1 < len(argv) {
+			bundlePath = argv[i+1]
+			i++
+			continue
+		}
+
+		// --bundle / -b was the last element of argv
+		return "", fmt.Errorf("bundle option requires an argument")
+	}
+
+	return bundlePath, nil
+}
+
+// findRunc locates runc in the path, returning the full path to the
+// binary or an error.
+func findRunc() (string, error) {
+	runtimeCandidates := []string{
+		dockerRuncExecutableName,
+		runcExecutableName,
+	}
+
+	return findRuntime(runtimeCandidates)
+}
+
+func findRuntime(runtimeCandidates []string) (string, error) {
+	for _, candidate := range runtimeCandidates {
+		logger.Infof("Looking for runtime binary '%v'", candidate)
+		runcPath, err := exec.LookPath(candidate)
+		if err == nil {
+			logger.Infof("Found runtime binary '%v'", runcPath)
+			return runcPath, nil
+		}
+		logger.Warnf("Runtime binary '%v' not found: %v", candidate, err)
+	}
+
+	return "", fmt.Errorf("no runtime binary found from candidate list: %v", runtimeCandidates)
+}
+
+func isBundleFlag(arg string) bool {
+	if !strings.HasPrefix(arg, "-") {
+		return false
+	}
+
+	trimmed := strings.TrimLeft(arg, "-")
+	return trimmed == "b" || trimmed == "bundle"
+}
+
+// getOCISpecFilePath returns the expected path to the OCI specification file for the given
+// bundle directory or the current working directory if not specified.
+func getOCISpecFilePath(bundleDir string) (string, error) {
+	if bundleDir == "" {
+		logger.Infof("Bundle directory path is empty, using working directory.")
+		workingDirectory, err := os.Getwd()
+		if err != nil {
+			return "", fmt.Errorf("error getting working directory: %v", err)
+		}
+		bundleDir = workingDirectory
+	}
+
+	logger.Infof("Using bundle directory: %v", bundleDir)
+
+	OCISpecFilePath := filepath.Join(bundleDir, ociSpecFileName)
+
+	logger.Infof("Using OCI specification file path: %v", OCISpecFilePath)
+
+	return OCISpecFilePath, nil
+}

cmd/nvidia-container-runtime/runtime_factory_test.go

@@ -0,0 +1,192 @@
+/*
+# Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+*/
+
+package main
+
+import (
+	"path/filepath"
+	"testing"
+
+	testlog "github.com/sirupsen/logrus/hooks/test"
+	"github.com/stretchr/testify/require"
+)
+
+func TestConstructor(t *testing.T) {
+	shim, err := newRuntime([]string{})
+
+	require.NoError(t, err)
+	require.NotNil(t, shim)
+}
+
+func TestGetBundlePath(t *testing.T) {
+	type expected struct {
+		bundle  string
+		isError bool
+	}
+	testCases := []struct {
+		argv     []string
+		expected expected
+	}{
+		{
+			argv: []string{},
+		},
+		{
+			argv: []string{"create"},
+		},
+		{
+			argv: []string{"--bundle"},
+			expected: expected{
+				isError: true,
+			},
+		},
+		{
+			argv: []string{"-b"},
+			expected: expected{
+				isError: true,
+			},
+		},
+		{
+			argv: []string{"--bundle", "/foo/bar"},
+			expected: expected{
+				bundle: "/foo/bar",
+			},
+		},
+		{
+			argv: []string{"--not-bundle", "/foo/bar"},
+		},
+		{
+			argv: []string{"--"},
+		},
+		{
+			argv: []string{"-bundle", "/foo/bar"},
+			expected: expected{
+				bundle: "/foo/bar",
+			},
+		},
+		{
+			argv: []string{"--bundle=/foo/bar"},
+			expected: expected{
+				bundle: "/foo/bar",
+			},
+		},
+		{
+			argv: []string{"-b=/foo/bar"},
+			expected: expected{
+				bundle: "/foo/bar",
+			},
+		},
+		{
+			argv: []string{"-b=/foo/=bar"},
+			expected: expected{
+				bundle: "/foo/=bar",
+			},
+		},
+		{
+			argv: []string{"-b", "/foo/bar"},
+			expected: expected{
+				bundle: "/foo/bar",
+			},
+		},
+		{
+			argv: []string{"create", "-b", "/foo/bar"},
+			expected: expected{
+				bundle: "/foo/bar",
+			},
+		},
+		{
+			argv: []string{"-b", "create", "create"},
+			expected: expected{
+				bundle: "create",
+			},
+		},
+		{
+			argv: []string{"-b=create", "create"},
+			expected: expected{
+				bundle: "create",
+			},
+		},
+		{
+			argv: []string{"-b", "create"},
+			expected: expected{
+				bundle: "create",
+			},
+		},
+	}
+
+	for i, tc := range testCases {
+		bundle, err := getBundlePath(tc.argv)
+
+		if tc.expected.isError {
+			require.Errorf(t, err, "%d: %v", i, tc)
+		} else {
+			require.NoErrorf(t, err, "%d: %v", i, tc)
+		}
+
+		require.Equalf(t, tc.expected.bundle, bundle, "%d: %v", i, tc)
+	}
+}
+
+func TestFindRunc(t *testing.T) {
+	testLogger, _ := testlog.NewNullLogger()
+	logger.Logger = testLogger
+
+	runcPath, err := findRunc()
+	require.NoError(t, err)
+	require.Equal(t, filepath.Join(cfg.binPath, runcExecutableName), runcPath)
+}
+
+func TestFindRuntime(t *testing.T) {
+	testLogger, _ := testlog.NewNullLogger()
+	logger.Logger = testLogger
+
+	testCases := []struct {
+		candidates   []string
+		expectedPath string
+	}{
+		{
+			candidates: []string{},
+		},
+		{
+			candidates: []string{"not-runc"},
+		},
+		{
+			candidates: []string{"not-runc", "also-not-runc"},
+		},
+		{
+			candidates:   []string{runcExecutableName},
+			expectedPath: filepath.Join(cfg.binPath, runcExecutableName),
+		},
+		{
+			candidates:   []string{runcExecutableName, "not-runc"},
+			expectedPath: filepath.Join(cfg.binPath, runcExecutableName),
+		},
+		{
+			candidates:   []string{"not-runc", runcExecutableName},
+			expectedPath: filepath.Join(cfg.binPath, runcExecutableName),
+		},
+	}
+
+	for i, tc := range testCases {
+		runcPath, err := findRuntime(tc.candidates)
+		if tc.expectedPath == "" {
+			require.Error(t, err, "%d: %v", i, tc)
+		} else {
+			require.NoError(t, err, "%d: %v", i, tc)
+		}
+		require.Equal(t, tc.expectedPath, runcPath, "%d: %v", i, tc)
+	}
+
+}

cmd/nvidia-container-toolkit/container_config.go

@@ -216,6 +216,7 @@ func getDevicesFromEnvvar(env map[string]string, legacyImage bool) *string {
 	for _, envVar := range envVars {
 		if devs, ok := env[envVar]; ok {
 			devices = &devs
+			break
 		}
 	}
 

cmd/nvidia-container-toolkit/container_test.go

@@ -2,8 +2,9 @@ package main
 
 import (
 	"path/filepath"
-	"reflect"
 	"testing"
+
+	"github.com/stretchr/testify/require"
 )
 
 func TestGetNvidiaConfig(t *testing.T) {
@@ -414,7 +415,7 @@ func TestGetNvidiaConfig(t *testing.T) {
 
 			// For any tests that are expected to panic, make sure they do.
 			if tc.expectedPanic {
-				mustPanic(t, getConfig)
+				require.Panics(t, getConfig)
 				return
 			}
 
@@ -422,31 +423,20 @@ func TestGetNvidiaConfig(t *testing.T) {
 			getConfig()
 
 			// And start comparing the test results to the expected results.
-			if config == nil && tc.expectedConfig == nil {
+			if tc.expectedConfig == nil {
+				require.Nil(t, config, tc.description)
 				return
 			}
-			if config != nil && tc.expectedConfig != nil {
-				if !reflect.DeepEqual(config.Devices, tc.expectedConfig.Devices) {
-					t.Errorf("Unexpected nvidiaConfig (got: %v, wanted: %v)", config, tc.expectedConfig)
-				}
-				if !reflect.DeepEqual(config.MigConfigDevices, tc.expectedConfig.MigConfigDevices) {
-					t.Errorf("Unexpected nvidiaConfig (got: %v, wanted: %v)", config, tc.expectedConfig)
-				}
-				if !reflect.DeepEqual(config.MigMonitorDevices, tc.expectedConfig.MigMonitorDevices) {
-					t.Errorf("Unexpected nvidiaConfig (got: %v, wanted: %v)", config, tc.expectedConfig)
-				}
-				if !reflect.DeepEqual(config.DriverCapabilities, tc.expectedConfig.DriverCapabilities) {
-					t.Errorf("Unexpected nvidiaConfig (got: %v, wanted: %v)", config, tc.expectedConfig)
-				}
-				if !elementsMatch(config.Requirements, tc.expectedConfig.Requirements) {
-					t.Errorf("Unexpected nvidiaConfig (got: %v, wanted: %v)", config, tc.expectedConfig)
-				}
-				if !reflect.DeepEqual(config.DisableRequire, tc.expectedConfig.DisableRequire) {
-					t.Errorf("Unexpected nvidiaConfig (got: %v, wanted: %v)", config, tc.expectedConfig)
-				}
-				return
-			}
-			t.Errorf("Unexpected nvidiaConfig (got: %v, wanted: %v)", config, tc.expectedConfig)
+
+			require.NotNil(t, config, tc.description)
+
+			require.Equal(t, tc.expectedConfig.Devices, config.Devices)
+			require.Equal(t, tc.expectedConfig.MigConfigDevices, config.MigConfigDevices)
+			require.Equal(t, tc.expectedConfig.MigMonitorDevices, config.MigMonitorDevices)
+			require.Equal(t, tc.expectedConfig.DriverCapabilities, config.DriverCapabilities)
+
+			require.ElementsMatch(t, tc.expectedConfig.Requirements, config.Requirements)
+			require.Equal(t, tc.expectedConfig.DisableRequire, config.DisableRequire)
 		})
 	}
 }
@@ -524,9 +514,7 @@ func TestGetDevicesFromMounts(t *testing.T) {
 	for _, tc := range tests {
 		t.Run(tc.description, func(t *testing.T) {
 			devices := getDevicesFromMounts(tc.mounts)
-			if !reflect.DeepEqual(devices, tc.expectedDevices) {
-				t.Errorf("Unexpected devices (got: %v, wanted: %v)", *devices, *tc.expectedDevices)
-			}
+			require.Equal(t, tc.expectedDevices, devices)
 		})
 	}
 }
@@ -639,36 +627,198 @@ func TestDeviceListSourcePriority(t *testing.T) {
 
 			// For all other tests, just grab the devices and check the results
 			getDevices()
-			if !reflect.DeepEqual(devices, tc.expectedDevices) {
-				t.Errorf("Unexpected devices (got: %v, wanted: %v)", *devices, *tc.expectedDevices)
-			}
+
+			require.Equal(t, tc.expectedDevices, devices)
 		})
 	}
 }
 
-func elementsMatch(slice0, slice1 []string) bool {
-	map0 := make(map[string]int)
-	map1 := make(map[string]int)
+func TestGetDevicesFromEnvvar(t *testing.T) {
+	all := "all"
+	empty := ""
+	envDockerResourceGPUs := "DOCKER_RESOURCE_GPUS"
+	gpuID := "GPU-12345"
+	anotherGPUID := "GPU-67890"
 
-	for _, e := range slice0 {
-		map0[e]++
+	var tests = []struct {
+		description     string
+		envSwarmGPU     *string
+		env             map[string]string
+		legacyImage     bool
+		expectedDevices *string
+	}{
+		{
+			description: "empty env returns nil for non-legacy image",
+		},
+		{
+			description: "blank NVIDIA_VISIBLE_DEVICES returns nil for non-legacy image",
+			env: map[string]string{
+				envNVVisibleDevices: "",
+			},
+		},
+		{
+			description: "'void' NVIDIA_VISIBLE_DEVICES returns nil for non-legacy image",
+			env: map[string]string{
+				envNVVisibleDevices: "void",
+			},
+		},
+		{
+			description: "'none' NVIDIA_VISIBLE_DEVICES returns empty for non-legacy image",
+			env: map[string]string{
+				envNVVisibleDevices: "none",
+			},
+			expectedDevices: &empty,
+		},
+		{
+			description: "NVIDIA_VISIBLE_DEVICES set returns value for non-legacy image",
+			env: map[string]string{
+				envNVVisibleDevices: gpuID,
+			},
+			expectedDevices: &gpuID,
+		},
+		{
+			description: "NVIDIA_VISIBLE_DEVICES set returns value for legacy image",
+			env: map[string]string{
+				envNVVisibleDevices: gpuID,
+			},
+			legacyImage:     true,
+			expectedDevices: &gpuID,
+		},
+		{
+			description:     "empty env returns all for legacy image",
+			legacyImage:     true,
+			expectedDevices: &all,
+		},
+		// Add the `DOCKER_RESOURCE_GPUS` envvar and ensure that this is ignored when
+		// not enabled
+		{
+			description: "missing NVIDIA_VISIBLE_DEVICES returns nil for non-legacy image",
+			env: map[string]string{
+				envDockerResourceGPUs: anotherGPUID,
+			},
+		},
+		{
+			description: "blank NVIDIA_VISIBLE_DEVICES returns nil for non-legacy image",
+			env: map[string]string{
+				envNVVisibleDevices:   "",
+				envDockerResourceGPUs: anotherGPUID,
+			},
+		},
+		{
+			description: "'void' NVIDIA_VISIBLE_DEVICES returns nil for non-legacy image",
+			env: map[string]string{
+				envNVVisibleDevices:   "void",
+				envDockerResourceGPUs: anotherGPUID,
+			},
+		},
+		{
+			description: "'none' NVIDIA_VISIBLE_DEVICES returns empty for non-legacy image",
+			env: map[string]string{
+				envNVVisibleDevices:   "none",
+				envDockerResourceGPUs: anotherGPUID,
+			},
+			expectedDevices: &empty,
+		},
+		{
+			description: "NVIDIA_VISIBLE_DEVICES set returns value for non-legacy image",
+			env: map[string]string{
+				envNVVisibleDevices:   gpuID,
+				envDockerResourceGPUs: anotherGPUID,
+			},
+			expectedDevices: &gpuID,
+		},
+		{
+			description: "NVIDIA_VISIBLE_DEVICES set returns value for legacy image",
+			env: map[string]string{
+				envNVVisibleDevices:   gpuID,
+				envDockerResourceGPUs: anotherGPUID,
+			},
+			legacyImage:     true,
+			expectedDevices: &gpuID,
+		},
+		{
+			description: "empty env returns all for legacy image",
+			env: map[string]string{
+				envDockerResourceGPUs: anotherGPUID,
+			},
+			legacyImage:     true,
+			expectedDevices: &all,
+		},
+		// Add the `DOCKER_RESOURCE_GPUS` envvar and ensure that this is selected when
+		// enabled
+		{
+			description: "empty env returns nil for non-legacy image",
+			envSwarmGPU: &envDockerResourceGPUs,
+		},
+		{
+			description: "blank DOCKER_RESOURCE_GPUS returns nil for non-legacy image",
+			envSwarmGPU: &envDockerResourceGPUs,
+			env: map[string]string{
+				envDockerResourceGPUs: "",
+			},
+		},
+		{
+			description: "'void' DOCKER_RESOURCE_GPUS returns nil for non-legacy image",
+			envSwarmGPU: &envDockerResourceGPUs,
+			env: map[string]string{
+				envDockerResourceGPUs: "void",
+			},
+		},
+		{
+			description: "'none' DOCKER_RESOURCE_GPUS returns empty for non-legacy image",
+			envSwarmGPU: &envDockerResourceGPUs,
+			env: map[string]string{
+				envDockerResourceGPUs: "none",
+			},
+			expectedDevices: &empty,
+		},
+		{
+			description: "DOCKER_RESOURCE_GPUS set returns value for non-legacy image",
+			envSwarmGPU: &envDockerResourceGPUs,
+			env: map[string]string{
+				envDockerResourceGPUs: gpuID,
+			},
+			expectedDevices: &gpuID,
+		},
+		{
+			description: "DOCKER_RESOURCE_GPUS set returns value for legacy image",
+			envSwarmGPU: &envDockerResourceGPUs,
+			env: map[string]string{
+				envDockerResourceGPUs: gpuID,
+			},
+			legacyImage:     true,
+			expectedDevices: &gpuID,
+		},
+		{
+			description: "DOCKER_RESOURCE_GPUS is selected if present",
+			envSwarmGPU: &envDockerResourceGPUs,
+			env: map[string]string{
+				envDockerResourceGPUs: anotherGPUID,
+			},
+			expectedDevices: &anotherGPUID,
+		},
+		{
+			description: "DOCKER_RESOURCE_GPUS overrides NVIDIA_VISIBLE_DEVICES if present",
+			envSwarmGPU: &envDockerResourceGPUs,
+			env: map[string]string{
+				envNVVisibleDevices:   gpuID,
+				envDockerResourceGPUs: anotherGPUID,
+			},
+			expectedDevices: &anotherGPUID,
+		},
 	}
 
-	for _, e := range slice1 {
-		map1[e]++
-	}
+	for i, tc := range tests {
+		t.Run(tc.description, func(t *testing.T) {
+			envSwarmGPU = tc.envSwarmGPU
+			devices := getDevicesFromEnvvar(tc.env, tc.legacyImage)
+			if tc.expectedDevices == nil {
+				require.Nil(t, devices, "%d: %v", i, tc)
+				return
+			}
 
-	for k0, v0 := range map0 {
-		if map1[k0] != v0 {
-			return false
-		}
+			require.NotNil(t, devices, "%d: %v", i, tc)
+			require.Equal(t, *tc.expectedDevices, *devices, "%d: %v", i, tc)
+		})
 	}
-
-	for k1, v1 := range map1 {
-		if map0[k1] != v1 {
-			return false
-		}
-	}
-
-	return true
 }

cmd/nvidia-container-toolkit/hook_test.go

@@ -3,6 +3,8 @@ package main
 import (
 	"encoding/json"
 	"testing"
+
+	"github.com/stretchr/testify/require"
 )
 
 func TestParseCudaVersionValid(t *testing.T) {
@@ -16,24 +18,15 @@ func TestParseCudaVersionValid(t *testing.T) {
 		{"9.0.116", [3]uint32{9, 0, 116}},
 		{"4294967295.4294967295.4294967295", [3]uint32{4294967295, 4294967295, 4294967295}},
 	}
-	for _, c := range tests {
+	for i, c := range tests {
 		vmaj, vmin, vpatch := parseCudaVersion(c.version)
-		if vmaj != c.expected[0] || vmin != c.expected[1] || vpatch != c.expected[2] {
-			t.Errorf("parseCudaVersion(%s): %d.%d.%d (expected: %v)", c.version, vmaj, vmin, vpatch, c.expected)
-		}
+
+		version := [3]uint32{vmaj, vmin, vpatch}
+
+		require.Equal(t, c.expected, version, "%d: %v", i, c)
 	}
 }
 
-func mustPanic(t *testing.T, f func()) {
-	defer func() {
-		if err := recover(); err == nil {
-			t.Error("Test didn't panic!")
-		}
-	}()
-
-	f()
-}
-
 func TestParseCudaVersionInvalid(t *testing.T) {
 	var tests = []string{
 		"foo",
@@ -53,10 +46,9 @@ func TestParseCudaVersionInvalid(t *testing.T) {
 		"-9.-1.-116",
 	}
 	for _, c := range tests {
-		mustPanic(t, func() {
-			t.Logf("parseCudaVersion(%s)", c)
+		require.Panics(t, func() {
 			parseCudaVersion(c)
-		})
+		}, "parseCudaVersion(%v)", c)
 	}
 }
 
@@ -132,12 +124,11 @@ func TestIsPrivileged(t *testing.T) {
 			false,
 		},
 	}
-	for _, tc := range tests {
+	for i, tc := range tests {
 		var spec Spec
 		_ = json.Unmarshal([]byte(tc.spec), &spec)
 		privileged := isPrivileged(&spec)
-		if privileged != tc.expected {
-			t.Errorf("isPrivileged() returned unexpectred value (privileged: %v, tc.expected: %v)", privileged, tc.expected)
-		}
+
+		require.Equal(t, tc.expected, privileged, "%d: %v", i, tc)
 	}
 }

docker/Dockerfile.amazonlinux

@@ -40,8 +40,7 @@ RUN mkdir -p $DIST_DIR /dist
 WORKDIR $GOPATH/src/nvidia-container-toolkit
 COPY . .
 
-RUN make binary && \
-    mv ./nvidia-container-toolkit $DIST_DIR/nvidia-container-toolkit
+RUN make PREFIX=${DIST_DIR} cmds
 
 COPY config/config.toml.amzn $DIST_DIR/config.toml
 
@@ -60,6 +59,7 @@ CMD arch=$(uname -m) && \
     rpmbuild --clean --target=$arch -bb \
              -D "_topdir $PWD" \
              -D "version $VERSION" \
+             -D "libnvidia_container_version ${VERSION}-${RELEASE}" \
              -D "release $RELEASE" \
              SPECS/nvidia-container-toolkit.spec && \
     mv RPMS/$arch/*.rpm /dist

docker/Dockerfile.centos

@@ -40,8 +40,7 @@ RUN mkdir -p $DIST_DIR /dist
 WORKDIR $GOPATH/src/nvidia-container-toolkit
 COPY . .
 
-RUN make binary && \
-    mv ./nvidia-container-toolkit $DIST_DIR/nvidia-container-toolkit
+RUN make PREFIX=${DIST_DIR} cmds
 
 COPY config/config.toml.centos $DIST_DIR/config.toml
 
@@ -58,6 +57,7 @@ CMD arch=$(uname -m) && \
     rpmbuild --clean --target=$arch -bb \
              -D "_topdir $PWD" \
              -D "version $VERSION" \
+             -D "libnvidia_container_version ${VERSION}-${RELEASE}" \
              -D "release $RELEASE" \
              SPECS/nvidia-container-toolkit.spec && \
     mv RPMS/$arch/*.rpm /dist

docker/Dockerfile.debian

@@ -48,8 +48,7 @@ RUN mkdir -p $DIST_DIR /dist
 WORKDIR $GOPATH/src/nvidia-container-toolkit
 COPY . .
 
-RUN make binary && \
-    mv ./nvidia-container-toolkit $DIST_DIR/nvidia-container-toolkit
+RUN make PREFIX=${DIST_DIR} cmds
 
 COPY config/config.toml.debian $DIST_DIR/config.toml
 
@@ -65,5 +64,6 @@ RUN sed -i "s;@VERSION@;${REVISION};" debian/changelog && \
     if [ "$REVISION" != "$(dpkg-parsechangelog --show-field=Version)" ]; then exit 1; fi
 
 CMD export DISTRIB="$(lsb_release -cs)" && \
-    debuild -eDISTRIB -eSECTION --dpkg-buildpackage-hook='sh debian/prepare' -i -us -uc -b && \
+    debuild -eDISTRIB -eSECTION -eLIBNVIDIA_CONTAINER_VERSION="${REVISION}" \
+    --dpkg-buildpackage-hook='sh debian/prepare' -i -us -uc -b && \
     mv /tmp/nvidia-container-toolkit_*.deb /dist

docker/Dockerfile.devel

@@ -0,0 +1,20 @@
+# Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+ARG GOLANG_VERSION=x.x.x
+FROM golang:${GOLANG_VERSION}
+
+RUN go get -u golang.org/x/lint/golint
+RUN go get -u github.com/matryer/moq
+RUN go get -u github.com/gordonklaus/ineffassign
+RUN go get -u github.com/client9/misspell/cmd/misspell

docker/Dockerfile.opensuse-leap

@@ -39,8 +39,7 @@ RUN mkdir -p $DIST_DIR /dist
 WORKDIR $GOPATH/src/nvidia-container-toolkit
 COPY . .
 
-RUN make binary && \
-    mv ./nvidia-container-toolkit $DIST_DIR/nvidia-container-toolkit
+RUN make PREFIX=${DIST_DIR} cmds
 
 # Hook for Project Atomic's fork of Docker: https://github.com/projectatomic/docker/tree/docker-1.13.1-rhel#add-dockerhooks-exec-custom-hooks-for-prestartpoststop-containerspatch
 COPY oci-nvidia-hook $DIST_DIR/oci-nvidia-hook
@@ -57,6 +56,7 @@ CMD arch=$(uname -m) && \
     rpmbuild --clean --target=$arch -bb \
              -D "_topdir $PWD" \
              -D "version $VERSION" \
+             -D "libnvidia_container_version ${VERSION}-${RELEASE}" \
              -D "release $RELEASE" \
              SPECS/nvidia-container-toolkit.spec && \
     mv RPMS/$arch/*.rpm /dist

docker/Dockerfile.ubuntu

@@ -46,8 +46,7 @@ RUN mkdir -p $DIST_DIR /dist
 WORKDIR $GOPATH/src/nvidia-container-toolkit
 COPY . .
 
-RUN make binary && \
-    mv ./nvidia-container-toolkit $DIST_DIR/nvidia-container-toolkit
+RUN make PREFIX=${DIST_DIR} cmds
 
 COPY config/config.toml.ubuntu $DIST_DIR/config.toml
 
@@ -58,5 +57,6 @@ RUN sed -i "s;@VERSION@;${REVISION};" debian/changelog && \
     if [ "$REVISION" != "$(dpkg-parsechangelog --show-field=Version)" ]; then exit 1; fi
 
 CMD export DISTRIB="$(lsb_release -cs)" && \
-    debuild -eDISTRIB -eSECTION --dpkg-buildpackage-hook='sh debian/prepare' -i -us -uc -b && \
+    debuild -eDISTRIB -eSECTION -eLIBNVIDIA_CONTAINER_VERSION="${REVISION}" \
+    --dpkg-buildpackage-hook='sh debian/prepare' -i -us -uc -b && \
     mv /tmp/*.deb /dist

docker/docker.mk

@@ -17,7 +17,7 @@ AMD64_TARGETS := ubuntu20.04 ubuntu18.04 ubuntu16.04 debian10 debian9
 X86_64_TARGETS := centos7 centos8 rhel7 rhel8 amazonlinux1 amazonlinux2 opensuse-leap15.1
 PPC64LE_TARGETS := ubuntu18.04 ubuntu16.04 centos7 centos8 rhel7 rhel8
 ARM64_TARGETS := ubuntu20.04 ubuntu18.04
-AARCH64_TARGETS := centos8 rhel8
+AARCH64_TARGETS := centos8 rhel8 amazonlinux2
 
 # Define top-level build targets
 docker%: SHELL:=/bin/bash
@@ -97,11 +97,11 @@ docker-all: $(AMD64_TARGETS) $(X86_64_TARGETS) \
 
 # private centos target
 --centos%: OS := centos
---centos%: PKG_REV := $(if $(LIB_TAG),0.1.$(LIB_TAG),2)
+--centos%: PKG_REV := $(if $(LIB_TAG),0.1.$(LIB_TAG),1)
 
 # private amazonlinux target
 --amazonlinux%: OS := amazonlinux
---amazonlinux%: PKG_REV = $(if $(LIB_TAG),0.1.$(LIB_TAG).amzn$(VERSION),2.amzn$(VERSION))
+--amazonlinux%: PKG_REV := $(if $(LIB_TAG),0.1.$(LIB_TAG),1)
 
 # private opensuse-leap target
 --opensuse-leap%: OS = opensuse-leap
@@ -110,7 +110,7 @@ docker-all: $(AMD64_TARGETS) $(X86_64_TARGETS) \
 
 # private rhel target (actually built on centos)
 --rhel%: OS := centos
---rhel%: PKG_REV := $(if $(LIB_TAG),0.1.$(LIB_TAG),2)
+--rhel%: PKG_REV := $(if $(LIB_TAG),0.1.$(LIB_TAG),1)
 --rhel%: VERSION = $(patsubst rhel%-$(ARCH),%,$(TARGET_PLATFORM))
 --rhel%: ARTIFACTS_DIR = $(DIST_DIR)/rhel$(VERSION)/$(ARCH)
 

go.mod

@@ -4,6 +4,10 @@ go 1.14
 
 require (
 	github.com/BurntSushi/toml v0.3.1
-	github.com/stretchr/testify v1.6.0
+	github.com/opencontainers/runtime-spec v1.0.2
+	github.com/pelletier/go-toml v1.9.3
+	github.com/sirupsen/logrus v1.8.1
+	github.com/stretchr/testify v1.7.0
+	github.com/tsaikd/KDGoLib v0.0.0-20191001134900-7f3cf518e07d
 	golang.org/x/mod v0.3.0
 )

go.sum

@@ -1,25 +1,250 @@
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
+cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
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internal/oci/runtime.go

@@ -0,0 +1,23 @@
+/*
+# Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+*/
+
+package oci
+
+// Runtime is an interface for a runtime shim. The Exec method accepts a list
+// of command line arguments, and returns an error / nil.
+type Runtime interface {
+	Exec([]string) error
+}

internal/oci/runtime_exec.go

@@ -0,0 +1,79 @@
+/*
+# Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+*/
+
+package oci
+
+import (
+	"fmt"
+	"os"
+	"syscall"
+
+	log "github.com/sirupsen/logrus"
+)
+
+// SyscallExecRuntime wraps the path that a binary and defines the semanitcs for how to exec into it.
+// This can be used to wrap an OCI-compliant low-level runtime binary, allowing it to be used through the
+// Runtime internface.
+type SyscallExecRuntime struct {
+	logger *log.Logger
+	path   string
+	// exec is used for testing. This defaults to syscall.Exec
+	exec func(argv0 string, argv []string, envv []string) error
+}
+
+var _ Runtime = (*SyscallExecRuntime)(nil)
+
+// NewSyscallExecRuntime creates a SyscallExecRuntime for the specified path with the standard logger
+func NewSyscallExecRuntime(path string) (Runtime, error) {
+	return NewSyscallExecRuntimeWithLogger(log.StandardLogger(), path)
+}
+
+// NewSyscallExecRuntimeWithLogger creates a SyscallExecRuntime for the specified logger and path
+func NewSyscallExecRuntimeWithLogger(logger *log.Logger, path string) (Runtime, error) {
+	info, err := os.Stat(path)
+	if err != nil {
+		return nil, fmt.Errorf("invalid path '%v': %v", path, err)
+	}
+	if info.IsDir() || info.Mode()&0111 == 0 {
+		return nil, fmt.Errorf("specified path '%v' is not an executable file", path)
+	}
+
+	shim := SyscallExecRuntime{
+		logger: logger,
+		path:   path,
+		exec:   syscall.Exec,
+	}
+
+	return &shim, nil
+}
+
+// Exec exces into the binary at the path from the SyscallExecRuntime struct, passing it the supplied arguments
+// after ensuring that the first argument is the path of the target binary.
+func (s SyscallExecRuntime) Exec(args []string) error {
+	runtimeArgs := []string{s.path}
+	if len(args) > 1 {
+		runtimeArgs = append(runtimeArgs, args[1:]...)
+	}
+
+	err := s.exec(s.path, runtimeArgs, os.Environ())
+	if err != nil {
+		return fmt.Errorf("could not exec '%v': %v", s.path, err)
+	}
+
+	// syscall.Exec is not expected to return. This is an error state regardless of whether
+	// err is nil or not.
+	return fmt.Errorf("unexpected return from exec '%v'", s.path)
+}

internal/oci/runtime_exec_test.go

@@ -0,0 +1,100 @@
+/*
+# Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+*/
+package oci
+
+import (
+	"fmt"
+	"strings"
+	"testing"
+
+	testlog "github.com/sirupsen/logrus/hooks/test"
+	"github.com/stretchr/testify/require"
+)
+
+func TestSyscallExecConstructor(t *testing.T) {
+	r, err := NewSyscallExecRuntime("////an/invalid/path")
+	require.Error(t, err)
+	require.Nil(t, r)
+
+	r, err = NewSyscallExecRuntime("/tmp")
+	require.Error(t, err)
+	require.Nil(t, r)
+
+	r, err = NewSyscallExecRuntime("/dev/null")
+	require.Error(t, err)
+	require.Nil(t, r)
+
+	r, err = NewSyscallExecRuntime("/bin/sh")
+	require.NoError(t, err)
+
+	f, ok := r.(*SyscallExecRuntime)
+	require.True(t, ok)
+
+	require.Equal(t, "/bin/sh", f.path)
+}
+
+func TestSyscallExecForwardsArgs(t *testing.T) {
+	logger, _ := testlog.NewNullLogger()
+	f := SyscallExecRuntime{
+		logger: logger,
+		path:   "runtime",
+	}
+
+	testCases := []struct {
+		returnError error
+		args        []string
+		errorPrefix string
+	}{
+		{
+			returnError: nil,
+			errorPrefix: "unexpected return from exec",
+		},
+		{
+			returnError: fmt.Errorf("error from exec"),
+			errorPrefix: "could not exec",
+		},
+		{
+			returnError: nil,
+			args:        []string{"otherargv0"},
+			errorPrefix: "unexpected return from exec",
+		},
+		{
+			returnError: nil,
+			args:        []string{"otherargv0", "arg1", "arg2", "arg3"},
+			errorPrefix: "unexpected return from exec",
+		},
+	}
+
+	for i, tc := range testCases {
+		execMock := WithMockExec(f, tc.returnError)
+
+		err := execMock.Exec(tc.args)
+
+		require.Errorf(t, err, "%d: %v", i, tc)
+		require.Truef(t, strings.HasPrefix(err.Error(), tc.errorPrefix), "%d: %v", i, tc)
+		if tc.returnError != nil {
+			require.Truef(t, strings.HasSuffix(err.Error(), tc.returnError.Error()), "%d: %v", i, tc)
+		}
+
+		require.Equalf(t, f.path, execMock.argv0, "%d: %v", i, tc)
+		require.Equalf(t, f.path, execMock.argv[0], "%d: %v", i, tc)
+
+		require.LessOrEqualf(t, len(tc.args), len(execMock.argv), "%d: %v", i, tc)
+		if len(tc.args) > 1 {
+			require.Equalf(t, tc.args[1:], execMock.argv[1:], "%d: %v", i, tc)
+		}
+	}
+}

internal/oci/runtime_mock.go

@@ -0,0 +1,49 @@
+/*
+# Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+*/
+
+package oci
+
+// MockExecRuntime wraps a SyscallExecRuntime, intercepting the exec call for testing
+type MockExecRuntime struct {
+	SyscallExecRuntime
+	execMock
+}
+
+// WithMockExec wraps a specified SyscallExecRuntime with a mocked exec function for testing
+func WithMockExec(e SyscallExecRuntime, execResult error) *MockExecRuntime {
+	m := MockExecRuntime{
+		SyscallExecRuntime: e,
+		execMock:           execMock{result: execResult},
+	}
+	// overrdie the exec function to the mocked exec function.
+	m.SyscallExecRuntime.exec = m.execMock.exec
+	return &m
+}
+
+type execMock struct {
+	argv0  string
+	argv   []string
+	envv   []string
+	result error
+}
+
+func (m *execMock) exec(argv0 string, argv []string, envv []string) error {
+	m.argv0 = argv0
+	m.argv = argv
+	m.envv = envv
+
+	return m.result
+}

internal/oci/spec.go

@@ -0,0 +1,102 @@
+/*
+# Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+*/
+
+package oci
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+
+	oci "github.com/opencontainers/runtime-spec/specs-go"
+)
+
+// SpecModifier is a function that accepts a pointer to an OCI Srec and returns an
+// error. The intention is that the function would modify the spec in-place.
+type SpecModifier func(*oci.Spec) error
+
+// Spec defines the operations to be performed on an OCI specification
+type Spec interface {
+	Load() error
+	Flush() error
+	Modify(SpecModifier) error
+}
+
+type fileSpec struct {
+	*oci.Spec
+	path string
+}
+
+var _ Spec = (*fileSpec)(nil)
+
+// NewSpecFromFile creates an object that encapsulates a file-backed OCI spec.
+// This can be used to read from the file, modify the spec, and write to the
+// same file.
+func NewSpecFromFile(filepath string) Spec {
+	oci := fileSpec{
+		path: filepath,
+	}
+
+	return &oci
+}
+
+// Load reads the contents of an OCI spec from file to be referenced internally.
+// The file is opened "read-only"
+func (s *fileSpec) Load() error {
+	specFile, err := os.Open(s.path)
+	if err != nil {
+		return fmt.Errorf("error opening OCI specification file: %v", err)
+	}
+	defer specFile.Close()
+
+	decoder := json.NewDecoder(specFile)
+
+	var spec oci.Spec
+	err = decoder.Decode(&spec)
+	if err != nil {
+		return fmt.Errorf("error reading OCI specification from file: %v", err)
+	}
+
+	s.Spec = &spec
+	return nil
+}
+
+// Modify applies the specified SpecModifier to the stored OCI specification.
+func (s *fileSpec) Modify(f SpecModifier) error {
+	if s.Spec == nil {
+		return fmt.Errorf("no spec loaded for modification")
+	}
+	return f(s.Spec)
+}
+
+// Flush writes the stored OCI specification to the filepath specifed by the path member.
+// The file is truncated upon opening, overwriting any existing contents.
+func (s fileSpec) Flush() error {
+	specFile, err := os.Create(s.path)
+	if err != nil {
+		return fmt.Errorf("error opening OCI specification file: %v", err)
+	}
+	defer specFile.Close()
+
+	encoder := json.NewEncoder(specFile)
+
+	err = encoder.Encode(s.Spec)
+	if err != nil {
+		return fmt.Errorf("error writing OCI specification to file: %v", err)
+	}
+
+	return nil
+}

internal/oci/spec_mock.go

@@ -0,0 +1,70 @@
+/*
+# Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+*/
+
+package oci
+
+import (
+	oci "github.com/opencontainers/runtime-spec/specs-go"
+)
+
+// MockSpec provides a simple mock for an OCI spec to be used in testing.
+// It also implements the SpecModifier interface.
+type MockSpec struct {
+	*oci.Spec
+	MockLoad   mockFunc
+	MockFlush  mockFunc
+	MockModify mockFunc
+}
+
+var _ Spec = (*MockSpec)(nil)
+
+// NewMockSpec constructs a MockSpec to be used in testing as a Spec
+func NewMockSpec(spec *oci.Spec, flushResult error, modifyResult error) *MockSpec {
+	s := MockSpec{
+		Spec:       spec,
+		MockFlush:  mockFunc{result: flushResult},
+		MockModify: mockFunc{result: modifyResult},
+	}
+
+	return &s
+}
+
+// Load invokes the mocked Load function to return the predefined error / result
+func (s *MockSpec) Load() error {
+	return s.MockLoad.call()
+}
+
+// Flush invokes the mocked Load function to return the predefined error / result
+func (s *MockSpec) Flush() error {
+	return s.MockFlush.call()
+}
+
+// Modify applies the specified SpecModifier to the spec and invokes the
+// mocked modify function to return the predefined error / result.
+func (s *MockSpec) Modify(f SpecModifier) error {
+	f(s.Spec)
+	return s.MockModify.call()
+}
+
+type mockFunc struct {
+	Callcount int
+	result    error
+}
+
+func (m *mockFunc) call() error {
+	m.Callcount++
+	return m.result
+}

packaging/debian/changelog

@@ -1,3 +1,21 @@
+nvidia-container-toolkit (1.6.0~rc.1-1) experimental; urgency=medium
+
+  * Add AARCH64 package for Amazon Linux 2
+  * Include nvidia-container-runtime into nvidia-container-toolkit package
+
+ -- NVIDIA CORPORATION <cudatools@nvidia.com>  Mon, 06 Sep 2021 12:24:05 +0200
+
+nvidia-container-toolkit (1.5.1-1) UNRELEASED; urgency=medium
+
+  * Fix bug where Docker Swarm device selection is ignored if
+    NVIDIA_VISIBLE_DEVICES is also set
+  * Improve unit testing by using require package and adding coverage reports
+  * Remove unneeded go dependencies by running go mod tidy
+  * Move contents of pkg directory to cmd for CLI tools
+  * Ensure make binary target explicitly sets GOOS
+
+ -- NVIDIA CORPORATION <cudatools@nvidia.com>  Mon, 14 Jun 2021 09:00:00 -0700
+
 nvidia-container-toolkit (1.5.0-1) UNRELEASED; urgency=medium
 
   * Add dependence on libnvidia-container-tools >= 1.4.0
@@ -85,7 +103,7 @@ nvidia-container-toolkit (1.1.0-1) UNRELEASED; urgency=medium
 
   * 4e4de762 Update build system to support multi-arch builds
   * fcc1d116 Add support for MIG (Multi-Instance GPUs)
-  * d4ff0416 Add ability to merge envars of the form NVIDIA_VISIBLE_DEVICES_* 
+  * d4ff0416 Add ability to merge envars of the form NVIDIA_VISIBLE_DEVICES_*
   * 60f165ad Add no-pivot option to toolkit
 
  -- NVIDIA CORPORATION <cudatools@nvidia.com>  Fri, 15 May 2020 12:05:32 -0700

packaging/debian/control

@@ -10,8 +10,8 @@ Build-Depends: debhelper (>= 9)
 
 Package: nvidia-container-toolkit
 Architecture: any
-Depends: ${misc:Depends}, libnvidia-container-tools (>= 1.4.0), libnvidia-container-tools (<< 2.0.0)
-Breaks: nvidia-container-runtime (<< 2.0.0), nvidia-container-runtime-hook
-Replaces: nvidia-container-runtime (<< 2.0.0), nvidia-container-runtime-hook
+Depends: ${misc:Depends}, libnvidia-container-tools (>= @LIBNVIDIA_CONTAINER_VERSION@), libnvidia-container-tools (<< 2.0.0), libseccomp2
+Breaks: nvidia-container-runtime (<= 3.5.0-1), nvidia-container-runtime-hook
+Replaces: nvidia-container-runtime (<= 3.5.0-1), nvidia-container-runtime-hook
 Description: NVIDIA container runtime hook
  Provides a OCI hook to enable GPU support in containers.

packaging/debian/nvidia-container-toolkit.install

@@ -1,2 +1,3 @@
 config.toml /etc/nvidia-container-runtime
 nvidia-container-toolkit /usr/bin
+nvidia-container-runtime /usr/bin

packaging/debian/prepare

@@ -3,6 +3,7 @@
 set -e
 
 sed -i "s;@SECTION@;${SECTION:+$SECTION/};g" debian/control
+sed -i "s;@LIBNVIDIA_CONTAINER_VERSION@;${LIBNVIDIA_CONTAINER_VERSION:+$LIBNVIDIA_CONTAINER_VERSION};g" debian/control
 
 if [ -n "$DISTRIB" ]; then
     sed -i "s;UNRELEASED;$DISTRIB;" debian/changelog

packaging/rpm/SPECS/nvidia-container-toolkit.spec

@@ -11,24 +11,34 @@ URL: https://github.com/NVIDIA/nvidia-container-runtime
 License: Apache-2.0
 
 Source0: nvidia-container-toolkit
-Source1: config.toml
-Source2: oci-nvidia-hook
-Source3: oci-nvidia-hook.json
-Source4: LICENSE
+Source1: nvidia-container-runtime
+Source2: config.toml
+Source3: oci-nvidia-hook
+Source4: oci-nvidia-hook.json
+Source5: LICENSE
 
-Obsoletes: nvidia-container-runtime < 2.0.0, nvidia-container-runtime-hook
+Obsoletes: nvidia-container-runtime <= 3.5.0-1, nvidia-container-runtime-hook
+Provides: nvidia-container-runtime
 Provides: nvidia-container-runtime-hook
-Requires: libnvidia-container-tools >= 1.4.0, libnvidia-container-tools < 2.0.0
+Requires: libnvidia-container-tools >= %{libnvidia_container_version}, libnvidia-container-tools < 2.0.0
+
+%if 0%{?suse_version}
+Requires: libseccomp2
+Requires: libapparmor1
+%else
+Requires: libseccomp
+%endif
 
 %description
 Provides a OCI hook to enable GPU support in containers.
 
 %prep
-cp %{SOURCE0} %{SOURCE1} %{SOURCE2} %{SOURCE3} %{SOURCE4} .
+cp %{SOURCE0} %{SOURCE1} %{SOURCE2} %{SOURCE3} %{SOURCE4} %{SOURCE5} .
 
 %install
 mkdir -p %{buildroot}%{_bindir}
 install -m 755 -t %{buildroot}%{_bindir} nvidia-container-toolkit
+install -m 755 -t %{buildroot}%{_bindir} nvidia-container-runtime
 
 mkdir -p %{buildroot}/etc/nvidia-container-runtime
 install -m 644 -t %{buildroot}/etc/nvidia-container-runtime config.toml
@@ -48,11 +58,25 @@ rm -f %{_bindir}/nvidia-container-runtime-hook
 %files
 %license LICENSE
 %{_bindir}/nvidia-container-toolkit
+%{_bindir}/nvidia-container-runtime
 %config /etc/nvidia-container-runtime/config.toml
 /usr/libexec/oci/hooks.d/oci-nvidia-hook
 /usr/share/containers/oci/hooks.d/oci-nvidia-hook.json
 
 %changelog
+* Mon Sep 06 2021 NVIDIA CORPORATION <cudatools@nvidia.com> 1.6.0-0.1.rc.1
+
+- Add AARCH64 package for Amazon Linux 2
+- Include nvidia-container-runtime into nvidia-container-toolkit package
+
+* Mon Jun 14 2021 NVIDIA CORPORATION <cudatools@nvidia.com> 1.5.1-1
+
+- Fix bug where Docker Swarm device selection is ignored if NVIDIA_VISIBLE_DEVICES is also set
+- Improve unit testing by using require package and adding coverage reports
+- Remove unneeded go dependencies by running go mod tidy
+- Move contents of pkg directory to cmd for CLI tools
+- Ensure make binary target explicitly sets GOOS
+
 * Thu Apr 29 2021 NVIDIA CORPORATION <cudatools@nvidia.com> 1.5.0-1
 - Add dependence on libnvidia-container-tools >= 1.4.0
 - Add golang check targets to Makefile
@@ -106,5 +130,5 @@ rm -f %{_bindir}/nvidia-container-runtime-hook
 * Fri May 15 2020 NVIDIA CORPORATION <cudatools@nvidia.com> 1.1.0-1
 - 4e4de762 Update build system to support multi-arch builds
 - fcc1d116 Add support for MIG (Multi-Instance GPUs)
-- d4ff0416 Add ability to merge envars of the form NVIDIA_VISIBLE_DEVICES_* 
+- d4ff0416 Add ability to merge envars of the form NVIDIA_VISIBLE_DEVICES_*
 - 60f165ad Add no-pivot option to toolkit

scripts/build-all-components.sh

@@ -0,0 +1,67 @@
+#!/usr/bin/env bash
+
+# Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This script is used to build the packages for the components of the NVIDIA
+# Container Stack. These include the nvidia-container-toolkit in this repository
+# as well as the components included in the third_party folder.
+# All required packages are generated in the specified dist folder.
+
+function assert_usage() {
+    echo "Missing argument $1"
+    echo "$(basename ${BASH_SOURCE[0]}) TARGET"
+    exit 1
+}
+
+set -e -x
+
+SCRIPTS_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )"/../scripts && pwd )"
+PROJECT_ROOT="$( cd ${SCRIPTS_DIR}/.. && pwd )"
+
+if [[ $# -ne 1 ]]; then
+    assert_usage "TARGET"
+fi
+
+TARGET=$1
+
+: ${DIST_DIR:=${PROJECT_ROOT}/dist}
+export DIST_DIR
+
+echo "Building ${TARGET} for all packages to ${DIST_DIR}"
+
+: ${LIBNVIDIA_CONTAINER_ROOT:=${PROJECT_ROOT}/third_party/libnvidia-container}
+: ${NVIDIA_CONTAINER_TOOLKIT_ROOT:=${PROJECT_ROOT}}
+: ${NVIDIA_CONTAINER_RUNTIME_ROOT:=${PROJECT_ROOT}/third_party/nvidia-container-runtime}
+: ${NVIDIA_DOCKER_ROOT:=${PROJECT_ROOT}/third_party/nvidia-docker}
+
+
+${SCRIPTS_DIR}/get-component-versions.sh
+
+# Build libnvidia-container
+make -C ${LIBNVIDIA_CONTAINER_ROOT} -f mk/docker.mk ${TARGET}
+
+# Build nvidia-container-toolkit
+make -C ${NVIDIA_CONTAINER_TOOLKIT_ROOT} ${TARGET}
+
+# We set the TOOLKIT_VERSION for the nvidia-container-runtime and nvidia-docker targets
+# TODO: This is not yet enabled in the makefiles below
+: ${PREVIOUS_TOOLKIT_VERSION:=1.5.1}
+echo "Using TOOLKIT_VERSION=${PREVIOUS_TOOLKIT_VERSION} as previous nvidia-container-toolkit version"
+
+# Build nvidia-container-runtime
+make -C ${NVIDIA_CONTAINER_RUNTIME_ROOT} TOOLKIT_VERSION=${PREVIOUS_TOOLKIT_VERSION} ${TARGET}
+
+# Build nvidia-docker2
+make -C ${NVIDIA_DOCKER_ROOT} TOOLKIT_VERSION=${PREVIOUS_TOOLKIT_VERSION} ${TARGET}

scripts/get-component-versions.sh

@@ -0,0 +1,62 @@
+#!/usr/bin/env bash
+
+# Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This script is used to build the packages for the components of the NVIDIA
+# Container Stack. These include the nvidia-container-toolkit in this repository
+# as well as the components included in the third_party folder.
+# All required packages are generated in the specified dist folder.
+
+function assert_usage() {
+    exit 1
+}
+
+set -e
+
+SCRIPTS_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )"/../scripts && pwd )"
+PROJECT_ROOT="$( cd ${SCRIPTS_DIR}/.. && pwd )"
+
+: ${LIBNVIDIA_CONTAINER_ROOT:=${PROJECT_ROOT}/third_party/libnvidia-container}
+: ${NVIDIA_CONTAINER_TOOLKIT_ROOT:=${PROJECT_ROOT}}
+: ${NVIDIA_CONTAINER_RUNTIME_ROOT:=${PROJECT_ROOT}/third_party/nvidia-container-runtime}
+: ${NVIDIA_DOCKER_ROOT:=${PROJECT_ROOT}/third_party/nvidia-docker}
+
+# Get version for libnvidia-container
+libnvidia_container_version=$(grep "#define NVC_VERSION" ${LIBNVIDIA_CONTAINER_ROOT}/src/nvc.h \
+    | sed -e 's/#define NVC_VERSION[[:space:]]"\(.*\)"/\1/')
+
+# Get version for nvidia-container-toolit
+nvidia_container_toolkit_version=$(grep -m 1 "^LIB_VERSION := " ${NVIDIA_CONTAINER_TOOLKIT_ROOT}/Makefile | sed -e 's/LIB_VERSION :=[[:space:]]\(.*\)[[:space:]]*/\1/')
+nvidia_container_toolkit_tag=$(grep -m 1 "^LIB_TAG .= " ${NVIDIA_CONTAINER_TOOLKIT_ROOT}/Makefile | sed -e 's/LIB_TAG .=[[:space:]]\(.*\)[[:space:]]*/\1/')
+nvidia_container_toolkit_version="${nvidia_container_toolkit_version}${nvidia_container_toolkit_tag:+~${nvidia_container_toolkit_tag}}"
+
+# Get version for nvidia-container-runtime
+nvidia_container_runtime_version=$(grep -m 1 "^LIB_VERSION := " ${NVIDIA_CONTAINER_RUNTIME_ROOT}/Makefile | sed -e 's/LIB_VERSION :=[[:space:]]\(.*\)[[:space:]]*/\1/')
+nvidia_container_runtime_tag=$(grep -m 1 "^LIB_TAG .= " ${NVIDIA_CONTAINER_RUNTIME_ROOT}/Makefile | sed -e 's/LIB_TAG .=[[:space:]]\(.*\)[[:space:]]*/\1/')
+nvidia_container_runtime_version="${nvidia_container_runtime_version}${nvidia_container_runtime_tag:+~${nvidia_container_runtime_tag}}"
+
+# Get version for nvidia-docker
+nvidia_docker_version=$(grep -m 1 "^LIB_VERSION := " ${NVIDIA_DOCKER_ROOT}/Makefile | sed -e 's/LIB_VERSION :=[[:space:]]\(.*\)[[:space:]]*/\1/')
+nvidia_docker_tag=$(grep -m 1 "^LIB_TAG .= " ${NVIDIA_DOCKER_ROOT}/Makefile | sed -e 's/LIB_TAG .=[[:space:]]\(.*\)[[:space:]]*/\1/')
+nvidia_docker_version="${nvidia_docker_version}${nvidia_docker_tag:+~${nvidia_docker_tag}}"
+
+
+echo "LIBNVIDIA_CONTAINER_VERSION=${libnvidia_container_version}"
+echo "NVIDIA_CONTAINER_TOOLKIT_VERSION=${nvidia_container_toolkit_version}"
+if [[ "${libnvidia_container_version}" != "${nvidia_container_toolkit_version}" ]]; then
+    >&2 echo "WARNING: The libnvidia-container and nvidia-container-toolkit versions do not match"
+fi
+echo "NVIDIA_CONTAINER_RUNTIME_VERSION=${nvidia_container_runtime_version}"
+echo "NVIDIA_DOCKER_VERSION=${nvidia_docker_version}"

scripts/release.sh

@@ -0,0 +1,57 @@
+#!/usr/bin/env bash
+
+# Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This script is used to build the packages for the components of the NVIDIA
+# Container Stack. These include the nvidia-container-toolkit in this repository
+# as well as the components included in the third_party folder.
+# All required packages are generated in the specified dist folder.
+
+set -e -x
+
+SCRIPTS_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )"/../scripts && pwd )"
+PROJECT_ROOT="$( cd ${SCRIPTS_DIR}/.. && pwd )"
+
+# This list represents the distribution-architecture pairs that are actually published
+# to the relevant repositories. This targets forwarded to the build-all-components script
+# can be overridden by specifying command line arguments.
+all=(
+    amazonlinux1-x86_64
+    amazonlinux2-aarch64
+    amazonlinux2-x86_64
+    centos7-ppc64le
+    centos7-x86_64
+    centos8-aarch64
+    centos8-ppc64le
+    centos8-x86_64
+    debian10-amd64
+    debian9-amd64
+    opensuse-leap15.1-x86_64
+    ubuntu16.04-amd64
+    ubuntu16.04-ppc64le
+    ubuntu18.04-amd64
+    ubuntu18.04-arm64
+    ubuntu18.04-ppc64le
+)
+
+if [[ $# -gt 0 ]]; then
+    targets=($*)
+else
+    targets=${all[@]}
+fi
+
+for target in ${targets[@]}; do
+    ${SCRIPTS_DIR}/build-all-components.sh ${target}
+done

test/bin/nvidia-container-runtime-hook

@@ -0,0 +1,2 @@
+#!/bin/bash
+echo mock hook

test/bin/runc

@@ -0,0 +1,2 @@
+#!/bin/bash
+echo mock runc

test/input/test_spec.json

@@ -0,0 +1,178 @@
+{
+	"ociVersion": "1.0.1-dev",
+	"process": {
+		"terminal": true,
+		"user": {
+			"uid": 0,
+			"gid": 0
+		},
+		"args": [
+			"sh"
+		],
+		"env": [
+			"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
+			"TERM=xterm"
+		],
+		"cwd": "/",
+		"capabilities": {
+			"bounding": [
+				"CAP_AUDIT_WRITE",
+				"CAP_KILL",
+				"CAP_NET_BIND_SERVICE"
+			],
+			"effective": [
+				"CAP_AUDIT_WRITE",
+				"CAP_KILL",
+				"CAP_NET_BIND_SERVICE"
+			],
+			"inheritable": [
+				"CAP_AUDIT_WRITE",
+				"CAP_KILL",
+				"CAP_NET_BIND_SERVICE"
+			],
+			"permitted": [
+				"CAP_AUDIT_WRITE",
+				"CAP_KILL",
+				"CAP_NET_BIND_SERVICE"
+			],
+			"ambient": [
+				"CAP_AUDIT_WRITE",
+				"CAP_KILL",
+				"CAP_NET_BIND_SERVICE"
+			]
+		},
+		"rlimits": [
+			{
+				"type": "RLIMIT_NOFILE",
+				"hard": 1024,
+				"soft": 1024
+			}
+		],
+		"noNewPrivileges": true
+	},
+	"root": {
+		"path": "rootfs",
+		"readonly": true
+	},
+	"hostname": "runc",
+	"mounts": [
+		{
+			"destination": "/proc",
+			"type": "proc",
+			"source": "proc"
+		},
+		{
+			"destination": "/dev",
+			"type": "tmpfs",
+			"source": "tmpfs",
+			"options": [
+				"nosuid",
+				"strictatime",
+				"mode=755",
+				"size=65536k"
+			]
+		},
+		{
+			"destination": "/dev/pts",
+			"type": "devpts",
+			"source": "devpts",
+			"options": [
+				"nosuid",
+				"noexec",
+				"newinstance",
+				"ptmxmode=0666",
+				"mode=0620",
+				"gid=5"
+			]
+		},
+		{
+			"destination": "/dev/shm",
+			"type": "tmpfs",
+			"source": "shm",
+			"options": [
+				"nosuid",
+				"noexec",
+				"nodev",
+				"mode=1777",
+				"size=65536k"
+			]
+		},
+		{
+			"destination": "/dev/mqueue",
+			"type": "mqueue",
+			"source": "mqueue",
+			"options": [
+				"nosuid",
+				"noexec",
+				"nodev"
+			]
+		},
+		{
+			"destination": "/sys",
+			"type": "sysfs",
+			"source": "sysfs",
+			"options": [
+				"nosuid",
+				"noexec",
+				"nodev",
+				"ro"
+			]
+		},
+		{
+			"destination": "/sys/fs/cgroup",
+			"type": "cgroup",
+			"source": "cgroup",
+			"options": [
+				"nosuid",
+				"noexec",
+				"nodev",
+				"relatime",
+				"ro"
+			]
+		}
+	],
+	"linux": {
+		"resources": {
+			"devices": [
+				{
+					"allow": false,
+					"access": "rwm"
+				}
+			]
+		},
+		"namespaces": [
+			{
+				"type": "pid"
+			},
+			{
+				"type": "network"
+			},
+			{
+				"type": "ipc"
+			},
+			{
+				"type": "uts"
+			},
+			{
+				"type": "mount"
+			}
+		],
+		"maskedPaths": [
+			"/proc/kcore",
+			"/proc/latency_stats",
+			"/proc/timer_list",
+			"/proc/timer_stats",
+			"/proc/sched_debug",
+			"/sys/firmware",
+			"/proc/scsi"
+		],
+		"readonlyPaths": [
+			"/proc/asound",
+			"/proc/bus",
+			"/proc/fs",
+			"/proc/irq",
+			"/proc/sys",
+			"/proc/sysrq-trigger"
+		]
+	}
+}

test/release/Makefile

@@ -0,0 +1,59 @@
+# Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+WORKFLOW ?= nvidia-docker
+TEST_REPO ?= elezar.github.io
+
+DISTRIBUTIONS := ubuntu18.04 centos8
+
+IMAGE_TARGETS := $(patsubst %,image-%, $(DISTRIBUTIONS))
+RUN_TARGETS := $(patsubst %,run-%, $(DISTRIBUTIONS))
+RELEASE_TARGETS := $(patsubst %,release-%, $(DISTRIBUTIONS))
+LOCAL_TARGETS := $(patsubst %,local-%, $(DISTRIBUTIONS))
+
+.PHONY: $(IMAGE_TARGETS)
+
+image-%: DOCKERFILE = docker/$(*)/Dockerfile
+
+images: $(IMAGE_TARGETS)
+$(IMAGE_TARGETS): image-%:
+	docker build \
+    --build-arg WORKFLOW="$(WORKFLOW)" \
+    --build-arg TEST_REPO="$(TEST_REPO)" \
+    -t nvidia-container-toolkit-repo-test:$(*) \
+    -f $(DOCKERFILE) \
+    $(shell dirname $(DOCKERFILE))
+
+
+%-ubuntu18.04: ARCH = amd64
+%-centos8: ARCH = x86_64
+
+RELEASE_TEST_DIR := $(patsubst %/,%,$(dir $(abspath $(lastword $(MAKEFILE_LIST)))))
+PROJECT_ROOT := $(RELEASE_TEST_DIR)/../..
+
+LOCAL_PACKAGE_ROOT := $(PROJECT_ROOT)/dist
+
+local-%: DIST = $(*)
+local-%: LOCAL_REPO_ARGS = -v $(LOCAL_PACKAGE_ROOT)/$(DIST)/$(ARCH):/local-repository
+$(LOCAL_TARGETS): local-%: release-% run-% | release-%
+
+run-%: DIST = $(*)
+$(RUN_TARGETS): run-%:
+	docker run --rm -ti  \
+    $(LOCAL_REPO_ARGS) \
+    nvidia-container-toolkit-repo-test:$(*)
+
+# Ensure that the local package root exists
+$(RELEASE_TARGETS): release-%: $(LOCAL_PACKAGE_ROOT)/$(*)/$(ARCH)
+	$(PROJECT_ROOT)/scripts/release.sh $(*)-$(ARCH)

test/release/README.md

@@ -0,0 +1,107 @@
+# Testing Packaging Workflows
+
+## Building the Docker images:
+
+```bash
+make images
+```
+
+This assumes that the `nvidia-docker` workflow is being tested and that the test packages have been published to the `elezar.github.io` GitHub pages page. These can be overridden
+using make variables.
+
+Valid values for `workflow` are:
+* `nvidia-docker`
+* `nvidia-container-runtime`
+
+This follows the instructions for setting up the [`nvidia-docker` repostitory](https://docs.nvidia.com/datacenter/cloud-native/container-toolkit/install-guide.html#setting-up-nvidia-container-toolkit).
+
+
+## Testing local package changes
+
+Running:
+```bash
+make local-ubuntu18.04
+```
+will build the `ubuntu18.04-amd64` packages for release and launch a docker container with these packages added to a local APT repository.
+
+The various `apt` workflows can then be tested as if the packages were released to the `libnvidia-container` experimental repository.
+
+The `local-centos8` make target is available for testing the `centos8-x86_64` workflows as representative of `yum`-based installation workflows.
+
+
+### Example
+
+In the `centos8`-based container above we see the following `nvidia-docker2` packages available with the `local-repository` disabled:
+
+```bash
+$ yum list --showduplicates nvidia-docker2 | tail -2
+nvidia-docker2.noarch           2.5.0-1                            nvidia-docker
+nvidia-docker2.noarch           2.6.0-1                            nvidia-docker
+```
+
+Installing `nvidia-docker2` shows:
+```bash
+$ yum install -y nvidia-docker2
+```
+
+installs the following packages:
+```bash
+$ yum list installed | grep nvidia
+libnvidia-container-tools.x86_64   1.5.1-1                                 @libnvidia-container
+libnvidia-container1.x86_64        1.5.1-1                                 @libnvidia-container
+nvidia-container-runtime.x86_64    3.5.0-1                                 @nvidia-container-runtime
+nvidia-container-toolkit.x86_64    1.5.1-2                                 @nvidia-container-runtime
+nvidia-docker2.noarch              2.6.0-1                                 @nvidia-docker
+```
+Note the repositories where these packages were installed from.
+
+We now enable the `local-repository` to simulate the new packages being published to the `libnvidia-container` experimental repository and check the available `nvidia-docker2` versions:
+```bash
+$ yum-config-manager --enable local-repository
+$ yum list --showduplicates nvidia-docker2 | tail -2
+nvidia-docker2.noarch         2.6.0-1                           nvidia-docker
+nvidia-docker2.noarch         2.6.1-0.1.rc.1                    local-repository
+```
+Showing the new version available in the local repository.
+
+Running:
+```
+$ yum install nvidia-docker2
+Last metadata expiration check: 0:01:15 ago on Fri Sep 24 12:49:20 2021.
+Package nvidia-docker2-2.6.0-1.noarch is already installed.
+Dependencies resolved.
+===============================================================================================================================
+ Package                                Architecture        Version                        Repository                     Size
+===============================================================================================================================
+Upgrading:
+ libnvidia-container-tools              x86_64              1.6.0-0.1.rc.1                 local-repository               48 k
+ libnvidia-container1                   x86_64              1.6.0-0.1.rc.1                 local-repository               95 k
+ nvidia-container-toolkit               x86_64              1.6.0-0.1.rc.1                 local-repository              1.5 M
+     replacing  nvidia-container-runtime.x86_64 3.5.0-1
+ nvidia-docker2                         noarch              2.6.1-0.1.rc.1                 local-repository               13 k
+
+Transaction Summary
+===============================================================================================================================
+Upgrade  4 Packages
+
+Total size: 1.7 M
+```
+Showing that all the components of the stack will be updated with versions from the `local-repository`.
+
+After installation the installed packages are shown as:
+```bash
+$ yum list installed | grep nvidia
+libnvidia-container-tools.x86_64   1.6.0-0.1.rc.1                          @local-repository
+libnvidia-container1.x86_64        1.6.0-0.1.rc.1                          @local-repository
+nvidia-container-toolkit.x86_64    1.6.0-0.1.rc.1                          @local-repository
+nvidia-docker2.noarch              2.6.1-0.1.rc.1                          @local-repository
+```
+Showing that:
+1. All versions have been installed from the same repository
+2. The `nvidia-container-runtime` package was removed as it is no longer required.
+
+The `nvidia-container-runtime`  executable is, however, still present on the system:
+```bash
+# ls -l /usr/bin/nvidia-container-runtime
+-rwxr-xr-x 1 root root 2256280 Sep 24 12:42 /usr/bin/nvidia-container-runtime
+```

test/release/docker/centos8/Dockerfile

@@ -0,0 +1,35 @@
+FROM centos:8
+
+RUN yum install -y \
+    yum-utils \
+    ruby-devel \
+    gcc \
+    make \
+    rpm-build \
+    rubygems \
+    createrepo
+
+RUN gem install --no-document fpm
+
+# We create and install a dummy docker package since these dependencies are out of
+# scope for the tests performed here.
+RUN fpm -s empty \
+    -t rpm \
+    --description "A dummy package for docker-ce_18.06.3.ce-3.el7" \
+    -n docker-ce --version 18.06.3.ce-3.el7 \
+    -p /tmp/docker.rpm \
+    && \
+    yum localinstall -y /tmp/docker.rpm \
+    && \
+    rm -f /tmp/docker.rpm
+
+
+ARG WORKFLOW=nvidia-docker
+ARG TEST_REPO=nvidia.github.io
+ENV TEST_REPO ${TEST_REPO}
+RUN curl -s -L https://nvidia.github.io/${WORKFLOW}/centos8/nvidia-docker.repo \
+    | tee /etc/yum.repos.d/nvidia-docker.repo
+
+COPY entrypoint.sh /
+
+ENTRYPOINT [ "/entrypoint.sh" ]

test/release/docker/centos8/entrypoint.sh

@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+
+# Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This script is used to build the packages for the components of the NVIDIA
+# Container Stack. These include the nvidia-container-toolkit in this repository
+# as well as the components included in the third_party folder.
+# All required packages are generated in the specified dist folder.
+
+: ${LOCAL_REPO_DIRECTORY:=/local-repository}
+if [[ -d ${LOCAL_REPO_DIRECTORY} ]]; then
+    echo "Setting up local-repository"
+    createrepo /local-repository
+
+    cat >/etc/yum.repos.d/local.repo <<EOL
+[local-repository]
+name=NVIDIA Container Toolkit Local Packages
+baseurl=file:///local-repository
+enabled=0
+gpgcheck=0
+protect=1
+EOL
+    yum-config-manager --enable local-repository
+else
+    echo "Setting up TEST repo: ${TEST_REPO}"
+    sed -i -e 's#nvidia\.github\.io/libnvidia-container#${TEST_REPO}/libnvidia-container#g' /etc/yum.repos.d/nvidia-docker.repo
+    yum-config-manager --enable libnvidia-container-experimental
+fi
+
+exec bash $@

test/release/docker/ubuntu18.04/Dockerfile

@@ -0,0 +1,50 @@
+# Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+FROM ubuntu:18.04
+
+ARG DEBIAN_FRONTEND noninteractive
+RUN apt-get update && apt-get install --no-install-recommends -y \
+    curl \
+    gnupg2 \
+    apt-transport-https \
+    ca-certificates \
+    apt-utils \
+    ruby ruby-dev rubygems build-essential
+
+RUN gem install --no-document fpm
+
+# We create and install a dummy docker package since these dependencies are out of
+# scope for the tests performed here.
+RUN fpm -s empty \
+    -t deb \
+    --description "A dummy package for docker.io_18.06.0" \
+    -n docker.io --version 18.06.0 \
+    -p /tmp/docker.deb \
+    --deb-no-default-config-files \
+    && \
+    dpkg -i /tmp/docker.deb \
+    && \
+    rm -f /tmp/docker.deb
+
+
+ARG WORKFLOW=nvidia-docker
+RUN curl -s -L https://nvidia.github.io/${WORKFLOW}/gpgkey | apt-key add - \
+   && curl -s -L https://nvidia.github.io/${WORKFLOW}/ubuntu18.04/nvidia-docker.list | tee /etc/apt/sources.list.d/nvidia-docker.list \
+   && apt-get update
+
+COPY entrypoint.sh /
+COPY install_repo.sh /
+
+ENTRYPOINT [ "/entrypoint.sh" ]

test/release/docker/ubuntu18.04/entrypoint.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+# Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This script is used to build the packages for the components of the NVIDIA
+# Container Stack. These include the nvidia-container-toolkit in this repository
+# as well as the components included in the third_party folder.
+# All required packages are generated in the specified dist folder.
+
+: ${LOCAL_REPO_DIRECTORY:=/local-repository}
+if [[ -d ${LOCAL_REPO_DIRECTORY} ]]; then
+    echo "Setting up local-repository"
+    echo "deb [trusted=yes] file:/local-repository ./" > /etc/apt/sources.list.d/local.list
+    $(cd /local-repository && apt-ftparchive packages . > Packages)
+elif [[ -n ${TEST_REPO} ]]; then
+    ./install_repo.sh ${TEST_REPO}
+else
+    echo "Skipping repo setup"
+fi
+apt-get update
+
+exec bash $@

test/release/docker/ubuntu18.04/install_repo.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+
+# Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This script is used to build the packages for the components of the NVIDIA
+# Container Stack. These include the nvidia-container-toolkit in this repository
+# as well as the components included in the third_party folder.
+# All required packages are generated in the specified dist folder.
+
+test_repo=$1
+echo "Setting up TEST repo: ${test_repo}"
+sed -i -e "s#nvidia\.github\.io/libnvidia-container#${test_repo}/libnvidia-container#g" /etc/apt/sources.list.d/nvidia-docker.list
+sed -i -e '/experimental/ s/^#//g' /etc/apt/sources.list.d/nvidia-docker.list

vendor/github.com/BurntSushi/toml/.gitignore

@@ -0,0 +1,5 @@
+TAGS
+tags
+.*.swp
+tomlcheck/tomlcheck
+toml.test

vendor/github.com/BurntSushi/toml/.travis.yml

@@ -0,0 +1,15 @@
+language: go
+go:
+  - 1.1
+  - 1.2
+  - 1.3
+  - 1.4
+  - 1.5
+  - 1.6
+  - tip
+install:
+  - go install ./...
+  - go get github.com/BurntSushi/toml-test
+script:
+  - export PATH="$PATH:$HOME/gopath/bin"
+  - make test

vendor/github.com/BurntSushi/toml/COMPATIBLE

@@ -0,0 +1,3 @@
+Compatible with TOML version
+[v0.4.0](https://github.com/toml-lang/toml/blob/v0.4.0/versions/en/toml-v0.4.0.md)
+

vendor/github.com/BurntSushi/toml/COPYING

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2013 TOML authors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

vendor/github.com/BurntSushi/toml/Makefile

@@ -0,0 +1,19 @@
+install:
+	go install ./...
+
+test: install
+	go test -v
+	toml-test toml-test-decoder
+	toml-test -encoder toml-test-encoder
+
+fmt:
+	gofmt -w *.go */*.go
+	colcheck *.go */*.go
+
+tags:
+	find ./ -name '*.go' -print0 | xargs -0 gotags > TAGS
+
+push:
+	git push origin master
+	git push github master
+

vendor/github.com/BurntSushi/toml/README.md

@@ -0,0 +1,218 @@
+## TOML parser and encoder for Go with reflection
+
+TOML stands for Tom's Obvious, Minimal Language. This Go package provides a
+reflection interface similar to Go's standard library `json` and `xml`
+packages. This package also supports the `encoding.TextUnmarshaler` and
+`encoding.TextMarshaler` interfaces so that you can define custom data
+representations. (There is an example of this below.)
+
+Spec: https://github.com/toml-lang/toml
+
+Compatible with TOML version
+[v0.4.0](https://github.com/toml-lang/toml/blob/master/versions/en/toml-v0.4.0.md)
+
+Documentation: https://godoc.org/github.com/BurntSushi/toml
+
+Installation:
+
+```bash
+go get github.com/BurntSushi/toml
+```
+
+Try the toml validator:
+
+```bash
+go get github.com/BurntSushi/toml/cmd/tomlv
+tomlv some-toml-file.toml
+```
+
+[![Build Status](https://travis-ci.org/BurntSushi/toml.svg?branch=master)](https://travis-ci.org/BurntSushi/toml) [![GoDoc](https://godoc.org/github.com/BurntSushi/toml?status.svg)](https://godoc.org/github.com/BurntSushi/toml)
+
+### Testing
+
+This package passes all tests in
+[toml-test](https://github.com/BurntSushi/toml-test) for both the decoder
+and the encoder.
+
+### Examples
+
+This package works similarly to how the Go standard library handles `XML`
+and `JSON`. Namely, data is loaded into Go values via reflection.
+
+For the simplest example, consider some TOML file as just a list of keys
+and values:
+
+```toml
+Age = 25
+Cats = [ "Cauchy", "Plato" ]
+Pi = 3.14
+Perfection = [ 6, 28, 496, 8128 ]
+DOB = 1987-07-05T05:45:00Z
+```
+
+Which could be defined in Go as:
+
+```go
+type Config struct {
+  Age int
+  Cats []string
+  Pi float64
+  Perfection []int
+  DOB time.Time // requires `import time`
+}
+```
+
+And then decoded with:
+
+```go
+var conf Config
+if _, err := toml.Decode(tomlData, &conf); err != nil {
+  // handle error
+}
+```
+
+You can also use struct tags if your struct field name doesn't map to a TOML
+key value directly:
+
+```toml
+some_key_NAME = "wat"
+```
+
+```go
+type TOML struct {
+  ObscureKey string `toml:"some_key_NAME"`
+}
+```
+
+### Using the `encoding.TextUnmarshaler` interface
+
+Here's an example that automatically parses duration strings into
+`time.Duration` values:
+
+```toml
+[[song]]
+name = "Thunder Road"
+duration = "4m49s"
+
+[[song]]
+name = "Stairway to Heaven"
+duration = "8m03s"
+```
+
+Which can be decoded with:
+
+```go
+type song struct {
+  Name     string
+  Duration duration
+}
+type songs struct {
+  Song []song
+}
+var favorites songs
+if _, err := toml.Decode(blob, &favorites); err != nil {
+  log.Fatal(err)
+}
+
+for _, s := range favorites.Song {
+  fmt.Printf("%s (%s)\n", s.Name, s.Duration)
+}
+```
+
+And you'll also need a `duration` type that satisfies the
+`encoding.TextUnmarshaler` interface:
+
+```go
+type duration struct {
+	time.Duration
+}
+
+func (d *duration) UnmarshalText(text []byte) error {
+	var err error
+	d.Duration, err = time.ParseDuration(string(text))
+	return err
+}
+```
+
+### More complex usage
+
+Here's an example of how to load the example from the official spec page:
+
+```toml
+# This is a TOML document. Boom.
+
+title = "TOML Example"
+
+[owner]
+name = "Tom Preston-Werner"
+organization = "GitHub"
+bio = "GitHub Cofounder & CEO\nLikes tater tots and beer."
+dob = 1979-05-27T07:32:00Z # First class dates? Why not?
+
+[database]
+server = "192.168.1.1"
+ports = [ 8001, 8001, 8002 ]
+connection_max = 5000
+enabled = true
+
+[servers]
+
+  # You can indent as you please. Tabs or spaces. TOML don't care.
+  [servers.alpha]
+  ip = "10.0.0.1"
+  dc = "eqdc10"
+
+  [servers.beta]
+  ip = "10.0.0.2"
+  dc = "eqdc10"
+
+[clients]
+data = [ ["gamma", "delta"], [1, 2] ] # just an update to make sure parsers support it
+
+# Line breaks are OK when inside arrays
+hosts = [
+  "alpha",
+  "omega"
+]
+```
+
+And the corresponding Go types are:
+
+```go
+type tomlConfig struct {
+	Title string
+	Owner ownerInfo
+	DB database `toml:"database"`
+	Servers map[string]server
+	Clients clients
+}
+
+type ownerInfo struct {
+	Name string
+	Org string `toml:"organization"`
+	Bio string
+	DOB time.Time
+}
+
+type database struct {
+	Server string
+	Ports []int
+	ConnMax int `toml:"connection_max"`
+	Enabled bool
+}
+
+type server struct {
+	IP string
+	DC string
+}
+
+type clients struct {
+	Data [][]interface{}
+	Hosts []string
+}
+```
+
+Note that a case insensitive match will be tried if an exact match can't be
+found.
+
+A working example of the above can be found in `_examples/example.{go,toml}`.

vendor/github.com/BurntSushi/toml/decode.go

@@ -0,0 +1,509 @@
+package toml
+
+import (
+	"fmt"
+	"io"
+	"io/ioutil"
+	"math"
+	"reflect"
+	"strings"
+	"time"
+)
+
+func e(format string, args ...interface{}) error {
+	return fmt.Errorf("toml: "+format, args...)
+}
+
+// Unmarshaler is the interface implemented by objects that can unmarshal a
+// TOML description of themselves.
+type Unmarshaler interface {
+	UnmarshalTOML(interface{}) error
+}
+
+// Unmarshal decodes the contents of `p` in TOML format into a pointer `v`.
+func Unmarshal(p []byte, v interface{}) error {
+	_, err := Decode(string(p), v)
+	return err
+}
+
+// Primitive is a TOML value that hasn't been decoded into a Go value.
+// When using the various `Decode*` functions, the type `Primitive` may
+// be given to any value, and its decoding will be delayed.
+//
+// A `Primitive` value can be decoded using the `PrimitiveDecode` function.
+//
+// The underlying representation of a `Primitive` value is subject to change.
+// Do not rely on it.
+//
+// N.B. Primitive values are still parsed, so using them will only avoid
+// the overhead of reflection. They can be useful when you don't know the
+// exact type of TOML data until run time.
+type Primitive struct {
+	undecoded interface{}
+	context   Key
+}
+
+// DEPRECATED!
+//
+// Use MetaData.PrimitiveDecode instead.
+func PrimitiveDecode(primValue Primitive, v interface{}) error {
+	md := MetaData{decoded: make(map[string]bool)}
+	return md.unify(primValue.undecoded, rvalue(v))
+}
+
+// PrimitiveDecode is just like the other `Decode*` functions, except it
+// decodes a TOML value that has already been parsed. Valid primitive values
+// can *only* be obtained from values filled by the decoder functions,
+// including this method. (i.e., `v` may contain more `Primitive`
+// values.)
+//
+// Meta data for primitive values is included in the meta data returned by
+// the `Decode*` functions with one exception: keys returned by the Undecoded
+// method will only reflect keys that were decoded. Namely, any keys hidden
+// behind a Primitive will be considered undecoded. Executing this method will
+// update the undecoded keys in the meta data. (See the example.)
+func (md *MetaData) PrimitiveDecode(primValue Primitive, v interface{}) error {
+	md.context = primValue.context
+	defer func() { md.context = nil }()
+	return md.unify(primValue.undecoded, rvalue(v))
+}
+
+// Decode will decode the contents of `data` in TOML format into a pointer
+// `v`.
+//
+// TOML hashes correspond to Go structs or maps. (Dealer's choice. They can be
+// used interchangeably.)
+//
+// TOML arrays of tables correspond to either a slice of structs or a slice
+// of maps.
+//
+// TOML datetimes correspond to Go `time.Time` values.
+//
+// All other TOML types (float, string, int, bool and array) correspond
+// to the obvious Go types.
+//
+// An exception to the above rules is if a type implements the
+// encoding.TextUnmarshaler interface. In this case, any primitive TOML value
+// (floats, strings, integers, booleans and datetimes) will be converted to
+// a byte string and given to the value's UnmarshalText method. See the
+// Unmarshaler example for a demonstration with time duration strings.
+//
+// Key mapping
+//
+// TOML keys can map to either keys in a Go map or field names in a Go
+// struct. The special `toml` struct tag may be used to map TOML keys to
+// struct fields that don't match the key name exactly. (See the example.)
+// A case insensitive match to struct names will be tried if an exact match
+// can't be found.
+//
+// The mapping between TOML values and Go values is loose. That is, there
+// may exist TOML values that cannot be placed into your representation, and
+// there may be parts of your representation that do not correspond to
+// TOML values. This loose mapping can be made stricter by using the IsDefined
+// and/or Undecoded methods on the MetaData returned.
+//
+// This decoder will not handle cyclic types. If a cyclic type is passed,
+// `Decode` will not terminate.
+func Decode(data string, v interface{}) (MetaData, error) {
+	rv := reflect.ValueOf(v)
+	if rv.Kind() != reflect.Ptr {
+		return MetaData{}, e("Decode of non-pointer %s", reflect.TypeOf(v))
+	}
+	if rv.IsNil() {
+		return MetaData{}, e("Decode of nil %s", reflect.TypeOf(v))
+	}
+	p, err := parse(data)
+	if err != nil {
+		return MetaData{}, err
+	}
+	md := MetaData{
+		p.mapping, p.types, p.ordered,
+		make(map[string]bool, len(p.ordered)), nil,
+	}
+	return md, md.unify(p.mapping, indirect(rv))
+}
+
+// DecodeFile is just like Decode, except it will automatically read the
+// contents of the file at `fpath` and decode it for you.
+func DecodeFile(fpath string, v interface{}) (MetaData, error) {
+	bs, err := ioutil.ReadFile(fpath)
+	if err != nil {
+		return MetaData{}, err
+	}
+	return Decode(string(bs), v)
+}
+
+// DecodeReader is just like Decode, except it will consume all bytes
+// from the reader and decode it for you.
+func DecodeReader(r io.Reader, v interface{}) (MetaData, error) {
+	bs, err := ioutil.ReadAll(r)
+	if err != nil {
+		return MetaData{}, err
+	}
+	return Decode(string(bs), v)
+}
+
+// unify performs a sort of type unification based on the structure of `rv`,
+// which is the client representation.
+//
+// Any type mismatch produces an error. Finding a type that we don't know
+// how to handle produces an unsupported type error.
+func (md *MetaData) unify(data interface{}, rv reflect.Value) error {
+
+	// Special case. Look for a `Primitive` value.
+	if rv.Type() == reflect.TypeOf((*Primitive)(nil)).Elem() {
+		// Save the undecoded data and the key context into the primitive
+		// value.
+		context := make(Key, len(md.context))
+		copy(context, md.context)
+		rv.Set(reflect.ValueOf(Primitive{
+			undecoded: data,
+			context:   context,
+		}))
+		return nil
+	}
+
+	// Special case. Unmarshaler Interface support.
+	if rv.CanAddr() {
+		if v, ok := rv.Addr().Interface().(Unmarshaler); ok {
+			return v.UnmarshalTOML(data)
+		}
+	}
+
+	// Special case. Handle time.Time values specifically.
+	// TODO: Remove this code when we decide to drop support for Go 1.1.
+	// This isn't necessary in Go 1.2 because time.Time satisfies the encoding
+	// interfaces.
+	if rv.Type().AssignableTo(rvalue(time.Time{}).Type()) {
+		return md.unifyDatetime(data, rv)
+	}
+
+	// Special case. Look for a value satisfying the TextUnmarshaler interface.
+	if v, ok := rv.Interface().(TextUnmarshaler); ok {
+		return md.unifyText(data, v)
+	}
+	// BUG(burntsushi)
+	// The behavior here is incorrect whenever a Go type satisfies the
+	// encoding.TextUnmarshaler interface but also corresponds to a TOML
+	// hash or array. In particular, the unmarshaler should only be applied
+	// to primitive TOML values. But at this point, it will be applied to
+	// all kinds of values and produce an incorrect error whenever those values
+	// are hashes or arrays (including arrays of tables).
+
+	k := rv.Kind()
+
+	// laziness
+	if k >= reflect.Int && k <= reflect.Uint64 {
+		return md.unifyInt(data, rv)
+	}
+	switch k {
+	case reflect.Ptr:
+		elem := reflect.New(rv.Type().Elem())
+		err := md.unify(data, reflect.Indirect(elem))
+		if err != nil {
+			return err
+		}
+		rv.Set(elem)
+		return nil
+	case reflect.Struct:
+		return md.unifyStruct(data, rv)
+	case reflect.Map:
+		return md.unifyMap(data, rv)
+	case reflect.Array:
+		return md.unifyArray(data, rv)
+	case reflect.Slice:
+		return md.unifySlice(data, rv)
+	case reflect.String:
+		return md.unifyString(data, rv)
+	case reflect.Bool:
+		return md.unifyBool(data, rv)
+	case reflect.Interface:
+		// we only support empty interfaces.
+		if rv.NumMethod() > 0 {
+			return e("unsupported type %s", rv.Type())
+		}
+		return md.unifyAnything(data, rv)
+	case reflect.Float32:
+		fallthrough
+	case reflect.Float64:
+		return md.unifyFloat64(data, rv)
+	}
+	return e("unsupported type %s", rv.Kind())
+}
+
+func (md *MetaData) unifyStruct(mapping interface{}, rv reflect.Value) error {
+	tmap, ok := mapping.(map[string]interface{})
+	if !ok {
+		if mapping == nil {
+			return nil
+		}
+		return e("type mismatch for %s: expected table but found %T",
+			rv.Type().String(), mapping)
+	}
+
+	for key, datum := range tmap {
+		var f *field
+		fields := cachedTypeFields(rv.Type())
+		for i := range fields {
+			ff := &fields[i]
+			if ff.name == key {
+				f = ff
+				break
+			}
+			if f == nil && strings.EqualFold(ff.name, key) {
+				f = ff
+			}
+		}
+		if f != nil {
+			subv := rv
+			for _, i := range f.index {
+				subv = indirect(subv.Field(i))
+			}
+			if isUnifiable(subv) {
+				md.decoded[md.context.add(key).String()] = true
+				md.context = append(md.context, key)
+				if err := md.unify(datum, subv); err != nil {
+					return err
+				}
+				md.context = md.context[0 : len(md.context)-1]
+			} else if f.name != "" {
+				// Bad user! No soup for you!
+				return e("cannot write unexported field %s.%s",
+					rv.Type().String(), f.name)
+			}
+		}
+	}
+	return nil
+}
+
+func (md *MetaData) unifyMap(mapping interface{}, rv reflect.Value) error {
+	tmap, ok := mapping.(map[string]interface{})
+	if !ok {
+		if tmap == nil {
+			return nil
+		}
+		return badtype("map", mapping)
+	}
+	if rv.IsNil() {
+		rv.Set(reflect.MakeMap(rv.Type()))
+	}
+	for k, v := range tmap {
+		md.decoded[md.context.add(k).String()] = true
+		md.context = append(md.context, k)
+
+		rvkey := indirect(reflect.New(rv.Type().Key()))
+		rvval := reflect.Indirect(reflect.New(rv.Type().Elem()))
+		if err := md.unify(v, rvval); err != nil {
+			return err
+		}
+		md.context = md.context[0 : len(md.context)-1]
+
+		rvkey.SetString(k)
+		rv.SetMapIndex(rvkey, rvval)
+	}
+	return nil
+}
+
+func (md *MetaData) unifyArray(data interface{}, rv reflect.Value) error {
+	datav := reflect.ValueOf(data)
+	if datav.Kind() != reflect.Slice {
+		if !datav.IsValid() {
+			return nil
+		}
+		return badtype("slice", data)
+	}
+	sliceLen := datav.Len()
+	if sliceLen != rv.Len() {
+		return e("expected array length %d; got TOML array of length %d",
+			rv.Len(), sliceLen)
+	}
+	return md.unifySliceArray(datav, rv)
+}
+
+func (md *MetaData) unifySlice(data interface{}, rv reflect.Value) error {
+	datav := reflect.ValueOf(data)
+	if datav.Kind() != reflect.Slice {
+		if !datav.IsValid() {
+			return nil
+		}
+		return badtype("slice", data)
+	}
+	n := datav.Len()
+	if rv.IsNil() || rv.Cap() < n {
+		rv.Set(reflect.MakeSlice(rv.Type(), n, n))
+	}
+	rv.SetLen(n)
+	return md.unifySliceArray(datav, rv)
+}
+
+func (md *MetaData) unifySliceArray(data, rv reflect.Value) error {
+	sliceLen := data.Len()
+	for i := 0; i < sliceLen; i++ {
+		v := data.Index(i).Interface()
+		sliceval := indirect(rv.Index(i))
+		if err := md.unify(v, sliceval); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (md *MetaData) unifyDatetime(data interface{}, rv reflect.Value) error {
+	if _, ok := data.(time.Time); ok {
+		rv.Set(reflect.ValueOf(data))
+		return nil
+	}
+	return badtype("time.Time", data)
+}
+
+func (md *MetaData) unifyString(data interface{}, rv reflect.Value) error {
+	if s, ok := data.(string); ok {
+		rv.SetString(s)
+		return nil
+	}
+	return badtype("string", data)
+}
+
+func (md *MetaData) unifyFloat64(data interface{}, rv reflect.Value) error {
+	if num, ok := data.(float64); ok {
+		switch rv.Kind() {
+		case reflect.Float32:
+			fallthrough
+		case reflect.Float64:
+			rv.SetFloat(num)
+		default:
+			panic("bug")
+		}
+		return nil
+	}
+	return badtype("float", data)
+}
+
+func (md *MetaData) unifyInt(data interface{}, rv reflect.Value) error {
+	if num, ok := data.(int64); ok {
+		if rv.Kind() >= reflect.Int && rv.Kind() <= reflect.Int64 {
+			switch rv.Kind() {
+			case reflect.Int, reflect.Int64:
+				// No bounds checking necessary.
+			case reflect.Int8:
+				if num < math.MinInt8 || num > math.MaxInt8 {
+					return e("value %d is out of range for int8", num)
+				}
+			case reflect.Int16:
+				if num < math.MinInt16 || num > math.MaxInt16 {
+					return e("value %d is out of range for int16", num)
+				}
+			case reflect.Int32:
+				if num < math.MinInt32 || num > math.MaxInt32 {
+					return e("value %d is out of range for int32", num)
+				}
+			}
+			rv.SetInt(num)
+		} else if rv.Kind() >= reflect.Uint && rv.Kind() <= reflect.Uint64 {
+			unum := uint64(num)
+			switch rv.Kind() {
+			case reflect.Uint, reflect.Uint64:
+				// No bounds checking necessary.
+			case reflect.Uint8:
+				if num < 0 || unum > math.MaxUint8 {
+					return e("value %d is out of range for uint8", num)
+				}
+			case reflect.Uint16:
+				if num < 0 || unum > math.MaxUint16 {
+					return e("value %d is out of range for uint16", num)
+				}
+			case reflect.Uint32:
+				if num < 0 || unum > math.MaxUint32 {
+					return e("value %d is out of range for uint32", num)
+				}
+			}
+			rv.SetUint(unum)
+		} else {
+			panic("unreachable")
+		}
+		return nil
+	}
+	return badtype("integer", data)
+}
+
+func (md *MetaData) unifyBool(data interface{}, rv reflect.Value) error {
+	if b, ok := data.(bool); ok {
+		rv.SetBool(b)
+		return nil
+	}
+	return badtype("boolean", data)
+}
+
+func (md *MetaData) unifyAnything(data interface{}, rv reflect.Value) error {
+	rv.Set(reflect.ValueOf(data))
+	return nil
+}
+
+func (md *MetaData) unifyText(data interface{}, v TextUnmarshaler) error {
+	var s string
+	switch sdata := data.(type) {
+	case TextMarshaler:
+		text, err := sdata.MarshalText()
+		if err != nil {
+			return err
+		}
+		s = string(text)
+	case fmt.Stringer:
+		s = sdata.String()
+	case string:
+		s = sdata
+	case bool:
+		s = fmt.Sprintf("%v", sdata)
+	case int64:
+		s = fmt.Sprintf("%d", sdata)
+	case float64:
+		s = fmt.Sprintf("%f", sdata)
+	default:
+		return badtype("primitive (string-like)", data)
+	}
+	if err := v.UnmarshalText([]byte(s)); err != nil {
+		return err
+	}
+	return nil
+}
+
+// rvalue returns a reflect.Value of `v`. All pointers are resolved.
+func rvalue(v interface{}) reflect.Value {
+	return indirect(reflect.ValueOf(v))
+}
+
+// indirect returns the value pointed to by a pointer.
+// Pointers are followed until the value is not a pointer.
+// New values are allocated for each nil pointer.
+//
+// An exception to this rule is if the value satisfies an interface of
+// interest to us (like encoding.TextUnmarshaler).
+func indirect(v reflect.Value) reflect.Value {
+	if v.Kind() != reflect.Ptr {
+		if v.CanSet() {
+			pv := v.Addr()
+			if _, ok := pv.Interface().(TextUnmarshaler); ok {
+				return pv
+			}
+		}
+		return v
+	}
+	if v.IsNil() {
+		v.Set(reflect.New(v.Type().Elem()))
+	}
+	return indirect(reflect.Indirect(v))
+}
+
+func isUnifiable(rv reflect.Value) bool {
+	if rv.CanSet() {
+		return true
+	}
+	if _, ok := rv.Interface().(TextUnmarshaler); ok {
+		return true
+	}
+	return false
+}
+
+func badtype(expected string, data interface{}) error {
+	return e("cannot load TOML value of type %T into a Go %s", data, expected)
+}

vendor/github.com/BurntSushi/toml/decode_meta.go

@@ -0,0 +1,121 @@
+package toml
+
+import "strings"
+
+// MetaData allows access to meta information about TOML data that may not
+// be inferrable via reflection. In particular, whether a key has been defined
+// and the TOML type of a key.
+type MetaData struct {
+	mapping map[string]interface{}
+	types   map[string]tomlType
+	keys    []Key
+	decoded map[string]bool
+	context Key // Used only during decoding.
+}
+
+// IsDefined returns true if the key given exists in the TOML data. The key
+// should be specified hierarchially. e.g.,
+//
+//	// access the TOML key 'a.b.c'
+//	IsDefined("a", "b", "c")
+//
+// IsDefined will return false if an empty key given. Keys are case sensitive.
+func (md *MetaData) IsDefined(key ...string) bool {
+	if len(key) == 0 {
+		return false
+	}
+
+	var hash map[string]interface{}
+	var ok bool
+	var hashOrVal interface{} = md.mapping
+	for _, k := range key {
+		if hash, ok = hashOrVal.(map[string]interface{}); !ok {
+			return false
+		}
+		if hashOrVal, ok = hash[k]; !ok {
+			return false
+		}
+	}
+	return true
+}
+
+// Type returns a string representation of the type of the key specified.
+//
+// Type will return the empty string if given an empty key or a key that
+// does not exist. Keys are case sensitive.
+func (md *MetaData) Type(key ...string) string {
+	fullkey := strings.Join(key, ".")
+	if typ, ok := md.types[fullkey]; ok {
+		return typ.typeString()
+	}
+	return ""
+}
+
+// Key is the type of any TOML key, including key groups. Use (MetaData).Keys
+// to get values of this type.
+type Key []string
+
+func (k Key) String() string {
+	return strings.Join(k, ".")
+}
+
+func (k Key) maybeQuotedAll() string {
+	var ss []string
+	for i := range k {
+		ss = append(ss, k.maybeQuoted(i))
+	}
+	return strings.Join(ss, ".")
+}
+
+func (k Key) maybeQuoted(i int) string {
+	quote := false
+	for _, c := range k[i] {
+		if !isBareKeyChar(c) {
+			quote = true
+			break
+		}
+	}
+	if quote {
+		return "\"" + strings.Replace(k[i], "\"", "\\\"", -1) + "\""
+	}
+	return k[i]
+}
+
+func (k Key) add(piece string) Key {
+	newKey := make(Key, len(k)+1)
+	copy(newKey, k)
+	newKey[len(k)] = piece
+	return newKey
+}
+
+// Keys returns a slice of every key in the TOML data, including key groups.
+// Each key is itself a slice, where the first element is the top of the
+// hierarchy and the last is the most specific.
+//
+// The list will have the same order as the keys appeared in the TOML data.
+//
+// All keys returned are non-empty.
+func (md *MetaData) Keys() []Key {
+	return md.keys
+}
+
+// Undecoded returns all keys that have not been decoded in the order in which
+// they appear in the original TOML document.
+//
+// This includes keys that haven't been decoded because of a Primitive value.
+// Once the Primitive value is decoded, the keys will be considered decoded.
+//
+// Also note that decoding into an empty interface will result in no decoding,
+// and so no keys will be considered decoded.
+//
+// In this sense, the Undecoded keys correspond to keys in the TOML document
+// that do not have a concrete type in your representation.
+func (md *MetaData) Undecoded() []Key {
+	undecoded := make([]Key, 0, len(md.keys))
+	for _, key := range md.keys {
+		if !md.decoded[key.String()] {
+			undecoded = append(undecoded, key)
+		}
+	}
+	return undecoded
+}

vendor/github.com/BurntSushi/toml/doc.go

@@ -0,0 +1,27 @@
+/*
+Package toml provides facilities for decoding and encoding TOML configuration
+files via reflection. There is also support for delaying decoding with
+the Primitive type, and querying the set of keys in a TOML document with the
+MetaData type.
+
+The specification implemented: https://github.com/toml-lang/toml
+
+The sub-command github.com/BurntSushi/toml/cmd/tomlv can be used to verify
+whether a file is a valid TOML document. It can also be used to print the
+type of each key in a TOML document.
+
+Testing
+
+There are two important types of tests used for this package. The first is
+contained inside '*_test.go' files and uses the standard Go unit testing
+framework. These tests are primarily devoted to holistically testing the
+decoder and encoder.
+
+The second type of testing is used to verify the implementation's adherence
+to the TOML specification. These tests have been factored into their own
+project: https://github.com/BurntSushi/toml-test
+
+The reason the tests are in a separate project is so that they can be used by
+any implementation of TOML. Namely, it is language agnostic.
+*/
+package toml

vendor/github.com/BurntSushi/toml/encode.go

@@ -0,0 +1,568 @@
+package toml
+
+import (
+	"bufio"
+	"errors"
+	"fmt"
+	"io"
+	"reflect"
+	"sort"
+	"strconv"
+	"strings"
+	"time"
+)
+
+type tomlEncodeError struct{ error }
+
+var (
+	errArrayMixedElementTypes = errors.New(
+		"toml: cannot encode array with mixed element types")
+	errArrayNilElement = errors.New(
+		"toml: cannot encode array with nil element")
+	errNonString = errors.New(
+		"toml: cannot encode a map with non-string key type")
+	errAnonNonStruct = errors.New(
+		"toml: cannot encode an anonymous field that is not a struct")
+	errArrayNoTable = errors.New(
+		"toml: TOML array element cannot contain a table")
+	errNoKey = errors.New(
+		"toml: top-level values must be Go maps or structs")
+	errAnything = errors.New("") // used in testing
+)
+
+var quotedReplacer = strings.NewReplacer(
+	"\t", "\\t",
+	"\n", "\\n",
+	"\r", "\\r",
+	"\"", "\\\"",
+	"\\", "\\\\",
+)
+
+// Encoder controls the encoding of Go values to a TOML document to some
+// io.Writer.
+//
+// The indentation level can be controlled with the Indent field.
+type Encoder struct {
+	// A single indentation level. By default it is two spaces.
+	Indent string
+
+	// hasWritten is whether we have written any output to w yet.
+	hasWritten bool
+	w          *bufio.Writer
+}
+
+// NewEncoder returns a TOML encoder that encodes Go values to the io.Writer
+// given. By default, a single indentation level is 2 spaces.
+func NewEncoder(w io.Writer) *Encoder {
+	return &Encoder{
+		w:      bufio.NewWriter(w),
+		Indent: "  ",
+	}
+}
+
+// Encode writes a TOML representation of the Go value to the underlying
+// io.Writer. If the value given cannot be encoded to a valid TOML document,
+// then an error is returned.
+//
+// The mapping between Go values and TOML values should be precisely the same
+// as for the Decode* functions. Similarly, the TextMarshaler interface is
+// supported by encoding the resulting bytes as strings. (If you want to write
+// arbitrary binary data then you will need to use something like base64 since
+// TOML does not have any binary types.)
+//
+// When encoding TOML hashes (i.e., Go maps or structs), keys without any
+// sub-hashes are encoded first.
+//
+// If a Go map is encoded, then its keys are sorted alphabetically for
+// deterministic output. More control over this behavior may be provided if
+// there is demand for it.
+//
+// Encoding Go values without a corresponding TOML representation---like map
+// types with non-string keys---will cause an error to be returned. Similarly
+// for mixed arrays/slices, arrays/slices with nil elements, embedded
+// non-struct types and nested slices containing maps or structs.
+// (e.g., [][]map[string]string is not allowed but []map[string]string is OK
+// and so is []map[string][]string.)
+func (enc *Encoder) Encode(v interface{}) error {
+	rv := eindirect(reflect.ValueOf(v))
+	if err := enc.safeEncode(Key([]string{}), rv); err != nil {
+		return err
+	}
+	return enc.w.Flush()
+}
+
+func (enc *Encoder) safeEncode(key Key, rv reflect.Value) (err error) {
+	defer func() {
+		if r := recover(); r != nil {
+			if terr, ok := r.(tomlEncodeError); ok {
+				err = terr.error
+				return
+			}
+			panic(r)
+		}
+	}()
+	enc.encode(key, rv)
+	return nil
+}
+
+func (enc *Encoder) encode(key Key, rv reflect.Value) {
+	// Special case. Time needs to be in ISO8601 format.
+	// Special case. If we can marshal the type to text, then we used that.
+	// Basically, this prevents the encoder for handling these types as
+	// generic structs (or whatever the underlying type of a TextMarshaler is).
+	switch rv.Interface().(type) {
+	case time.Time, TextMarshaler:
+		enc.keyEqElement(key, rv)
+		return
+	}
+
+	k := rv.Kind()
+	switch k {
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32,
+		reflect.Int64,
+		reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32,
+		reflect.Uint64,
+		reflect.Float32, reflect.Float64, reflect.String, reflect.Bool:
+		enc.keyEqElement(key, rv)
+	case reflect.Array, reflect.Slice:
+		if typeEqual(tomlArrayHash, tomlTypeOfGo(rv)) {
+			enc.eArrayOfTables(key, rv)
+		} else {
+			enc.keyEqElement(key, rv)
+		}
+	case reflect.Interface:
+		if rv.IsNil() {
+			return
+		}
+		enc.encode(key, rv.Elem())
+	case reflect.Map:
+		if rv.IsNil() {
+			return
+		}
+		enc.eTable(key, rv)
+	case reflect.Ptr:
+		if rv.IsNil() {
+			return
+		}
+		enc.encode(key, rv.Elem())
+	case reflect.Struct:
+		enc.eTable(key, rv)
+	default:
+		panic(e("unsupported type for key '%s': %s", key, k))
+	}
+}
+
+// eElement encodes any value that can be an array element (primitives and
+// arrays).
+func (enc *Encoder) eElement(rv reflect.Value) {
+	switch v := rv.Interface().(type) {
+	case time.Time:
+		// Special case time.Time as a primitive. Has to come before
+		// TextMarshaler below because time.Time implements
+		// encoding.TextMarshaler, but we need to always use UTC.
+		enc.wf(v.UTC().Format("2006-01-02T15:04:05Z"))
+		return
+	case TextMarshaler:
+		// Special case. Use text marshaler if it's available for this value.
+		if s, err := v.MarshalText(); err != nil {
+			encPanic(err)
+		} else {
+			enc.writeQuoted(string(s))
+		}
+		return
+	}
+	switch rv.Kind() {
+	case reflect.Bool:
+		enc.wf(strconv.FormatBool(rv.Bool()))
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32,
+		reflect.Int64:
+		enc.wf(strconv.FormatInt(rv.Int(), 10))
+	case reflect.Uint, reflect.Uint8, reflect.Uint16,
+		reflect.Uint32, reflect.Uint64:
+		enc.wf(strconv.FormatUint(rv.Uint(), 10))
+	case reflect.Float32:
+		enc.wf(floatAddDecimal(strconv.FormatFloat(rv.Float(), 'f', -1, 32)))
+	case reflect.Float64:
+		enc.wf(floatAddDecimal(strconv.FormatFloat(rv.Float(), 'f', -1, 64)))
+	case reflect.Array, reflect.Slice:
+		enc.eArrayOrSliceElement(rv)
+	case reflect.Interface:
+		enc.eElement(rv.Elem())
+	case reflect.String:
+		enc.writeQuoted(rv.String())
+	default:
+		panic(e("unexpected primitive type: %s", rv.Kind()))
+	}
+}
+
+// By the TOML spec, all floats must have a decimal with at least one
+// number on either side.
+func floatAddDecimal(fstr string) string {
+	if !strings.Contains(fstr, ".") {
+		return fstr + ".0"
+	}
+	return fstr
+}
+
+func (enc *Encoder) writeQuoted(s string) {
+	enc.wf("\"%s\"", quotedReplacer.Replace(s))
+}
+
+func (enc *Encoder) eArrayOrSliceElement(rv reflect.Value) {
+	length := rv.Len()
+	enc.wf("[")
+	for i := 0; i < length; i++ {
+		elem := rv.Index(i)
+		enc.eElement(elem)
+		if i != length-1 {
+			enc.wf(", ")
+		}
+	}
+	enc.wf("]")
+}
+
+func (enc *Encoder) eArrayOfTables(key Key, rv reflect.Value) {
+	if len(key) == 0 {
+		encPanic(errNoKey)
+	}
+	for i := 0; i < rv.Len(); i++ {
+		trv := rv.Index(i)
+		if isNil(trv) {
+			continue
+		}
+		panicIfInvalidKey(key)
+		enc.newline()
+		enc.wf("%s[[%s]]", enc.indentStr(key), key.maybeQuotedAll())
+		enc.newline()
+		enc.eMapOrStruct(key, trv)
+	}
+}
+
+func (enc *Encoder) eTable(key Key, rv reflect.Value) {
+	panicIfInvalidKey(key)
+	if len(key) == 1 {
+		// Output an extra newline between top-level tables.
+		// (The newline isn't written if nothing else has been written though.)
+		enc.newline()
+	}
+	if len(key) > 0 {
+		enc.wf("%s[%s]", enc.indentStr(key), key.maybeQuotedAll())
+		enc.newline()
+	}
+	enc.eMapOrStruct(key, rv)
+}
+
+func (enc *Encoder) eMapOrStruct(key Key, rv reflect.Value) {
+	switch rv := eindirect(rv); rv.Kind() {
+	case reflect.Map:
+		enc.eMap(key, rv)
+	case reflect.Struct:
+		enc.eStruct(key, rv)
+	default:
+		panic("eTable: unhandled reflect.Value Kind: " + rv.Kind().String())
+	}
+}
+
+func (enc *Encoder) eMap(key Key, rv reflect.Value) {
+	rt := rv.Type()
+	if rt.Key().Kind() != reflect.String {
+		encPanic(errNonString)
+	}
+
+	// Sort keys so that we have deterministic output. And write keys directly
+	// underneath this key first, before writing sub-structs or sub-maps.
+	var mapKeysDirect, mapKeysSub []string
+	for _, mapKey := range rv.MapKeys() {
+		k := mapKey.String()
+		if typeIsHash(tomlTypeOfGo(rv.MapIndex(mapKey))) {
+			mapKeysSub = append(mapKeysSub, k)
+		} else {
+			mapKeysDirect = append(mapKeysDirect, k)
+		}
+	}
+
+	var writeMapKeys = func(mapKeys []string) {
+		sort.Strings(mapKeys)
+		for _, mapKey := range mapKeys {
+			mrv := rv.MapIndex(reflect.ValueOf(mapKey))
+			if isNil(mrv) {
+				// Don't write anything for nil fields.
+				continue
+			}
+			enc.encode(key.add(mapKey), mrv)
+		}
+	}
+	writeMapKeys(mapKeysDirect)
+	writeMapKeys(mapKeysSub)
+}
+
+func (enc *Encoder) eStruct(key Key, rv reflect.Value) {
+	// Write keys for fields directly under this key first, because if we write
+	// a field that creates a new table, then all keys under it will be in that
+	// table (not the one we're writing here).
+	rt := rv.Type()
+	var fieldsDirect, fieldsSub [][]int
+	var addFields func(rt reflect.Type, rv reflect.Value, start []int)
+	addFields = func(rt reflect.Type, rv reflect.Value, start []int) {
+		for i := 0; i < rt.NumField(); i++ {
+			f := rt.Field(i)
+			// skip unexported fields
+			if f.PkgPath != "" && !f.Anonymous {
+				continue
+			}
+			frv := rv.Field(i)
+			if f.Anonymous {
+				t := f.Type
+				switch t.Kind() {
+				case reflect.Struct:
+					// Treat anonymous struct fields with
+					// tag names as though they are not
+					// anonymous, like encoding/json does.
+					if getOptions(f.Tag).name == "" {
+						addFields(t, frv, f.Index)
+						continue
+					}
+				case reflect.Ptr:
+					if t.Elem().Kind() == reflect.Struct &&
+						getOptions(f.Tag).name == "" {
+						if !frv.IsNil() {
+							addFields(t.Elem(), frv.Elem(), f.Index)
+						}
+						continue
+					}
+					// Fall through to the normal field encoding logic below
+					// for non-struct anonymous fields.
+				}
+			}
+
+			if typeIsHash(tomlTypeOfGo(frv)) {
+				fieldsSub = append(fieldsSub, append(start, f.Index...))
+			} else {
+				fieldsDirect = append(fieldsDirect, append(start, f.Index...))
+			}
+		}
+	}
+	addFields(rt, rv, nil)
+
+	var writeFields = func(fields [][]int) {
+		for _, fieldIndex := range fields {
+			sft := rt.FieldByIndex(fieldIndex)
+			sf := rv.FieldByIndex(fieldIndex)
+			if isNil(sf) {
+				// Don't write anything for nil fields.
+				continue
+			}
+
+			opts := getOptions(sft.Tag)
+			if opts.skip {
+				continue
+			}
+			keyName := sft.Name
+			if opts.name != "" {
+				keyName = opts.name
+			}
+			if opts.omitempty && isEmpty(sf) {
+				continue
+			}
+			if opts.omitzero && isZero(sf) {
+				continue
+			}
+
+			enc.encode(key.add(keyName), sf)
+		}
+	}
+	writeFields(fieldsDirect)
+	writeFields(fieldsSub)
+}
+
+// tomlTypeName returns the TOML type name of the Go value's type. It is
+// used to determine whether the types of array elements are mixed (which is
+// forbidden). If the Go value is nil, then it is illegal for it to be an array
+// element, and valueIsNil is returned as true.
+
+// Returns the TOML type of a Go value. The type may be `nil`, which means
+// no concrete TOML type could be found.
+func tomlTypeOfGo(rv reflect.Value) tomlType {
+	if isNil(rv) || !rv.IsValid() {
+		return nil
+	}
+	switch rv.Kind() {
+	case reflect.Bool:
+		return tomlBool
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32,
+		reflect.Int64,
+		reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32,
+		reflect.Uint64:
+		return tomlInteger
+	case reflect.Float32, reflect.Float64:
+		return tomlFloat
+	case reflect.Array, reflect.Slice:
+		if typeEqual(tomlHash, tomlArrayType(rv)) {
+			return tomlArrayHash
+		}
+		return tomlArray
+	case reflect.Ptr, reflect.Interface:
+		return tomlTypeOfGo(rv.Elem())
+	case reflect.String:
+		return tomlString
+	case reflect.Map:
+		return tomlHash
+	case reflect.Struct:
+		switch rv.Interface().(type) {
+		case time.Time:
+			return tomlDatetime
+		case TextMarshaler:
+			return tomlString
+		default:
+			return tomlHash
+		}
+	default:
+		panic("unexpected reflect.Kind: " + rv.Kind().String())
+	}
+}
+
+// tomlArrayType returns the element type of a TOML array. The type returned
+// may be nil if it cannot be determined (e.g., a nil slice or a zero length
+// slize). This function may also panic if it finds a type that cannot be
+// expressed in TOML (such as nil elements, heterogeneous arrays or directly
+// nested arrays of tables).
+func tomlArrayType(rv reflect.Value) tomlType {
+	if isNil(rv) || !rv.IsValid() || rv.Len() == 0 {
+		return nil
+	}
+	firstType := tomlTypeOfGo(rv.Index(0))
+	if firstType == nil {
+		encPanic(errArrayNilElement)
+	}
+
+	rvlen := rv.Len()
+	for i := 1; i < rvlen; i++ {
+		elem := rv.Index(i)
+		switch elemType := tomlTypeOfGo(elem); {
+		case elemType == nil:
+			encPanic(errArrayNilElement)
+		case !typeEqual(firstType, elemType):
+			encPanic(errArrayMixedElementTypes)
+		}
+	}
+	// If we have a nested array, then we must make sure that the nested
+	// array contains ONLY primitives.
+	// This checks arbitrarily nested arrays.
+	if typeEqual(firstType, tomlArray) || typeEqual(firstType, tomlArrayHash) {
+		nest := tomlArrayType(eindirect(rv.Index(0)))
+		if typeEqual(nest, tomlHash) || typeEqual(nest, tomlArrayHash) {
+			encPanic(errArrayNoTable)
+		}
+	}
+	return firstType
+}
+
+type tagOptions struct {
+	skip      bool // "-"
+	name      string
+	omitempty bool
+	omitzero  bool
+}
+
+func getOptions(tag reflect.StructTag) tagOptions {
+	t := tag.Get("toml")
+	if t == "-" {
+		return tagOptions{skip: true}
+	}
+	var opts tagOptions
+	parts := strings.Split(t, ",")
+	opts.name = parts[0]
+	for _, s := range parts[1:] {
+		switch s {
+		case "omitempty":
+			opts.omitempty = true
+		case "omitzero":
+			opts.omitzero = true
+		}
+	}
+	return opts
+}
+
+func isZero(rv reflect.Value) bool {
+	switch rv.Kind() {
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return rv.Int() == 0
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		return rv.Uint() == 0
+	case reflect.Float32, reflect.Float64:
+		return rv.Float() == 0.0
+	}
+	return false
+}
+
+func isEmpty(rv reflect.Value) bool {
+	switch rv.Kind() {
+	case reflect.Array, reflect.Slice, reflect.Map, reflect.String:
+		return rv.Len() == 0
+	case reflect.Bool:
+		return !rv.Bool()
+	}
+	return false
+}
+
+func (enc *Encoder) newline() {
+	if enc.hasWritten {
+		enc.wf("\n")
+	}
+}
+
+func (enc *Encoder) keyEqElement(key Key, val reflect.Value) {
+	if len(key) == 0 {
+		encPanic(errNoKey)
+	}
+	panicIfInvalidKey(key)
+	enc.wf("%s%s = ", enc.indentStr(key), key.maybeQuoted(len(key)-1))
+	enc.eElement(val)
+	enc.newline()
+}
+
+func (enc *Encoder) wf(format string, v ...interface{}) {
+	if _, err := fmt.Fprintf(enc.w, format, v...); err != nil {
+		encPanic(err)
+	}
+	enc.hasWritten = true
+}
+
+func (enc *Encoder) indentStr(key Key) string {
+	return strings.Repeat(enc.Indent, len(key)-1)
+}
+
+func encPanic(err error) {
+	panic(tomlEncodeError{err})
+}
+
+func eindirect(v reflect.Value) reflect.Value {
+	switch v.Kind() {
+	case reflect.Ptr, reflect.Interface:
+		return eindirect(v.Elem())
+	default:
+		return v
+	}
+}
+
+func isNil(rv reflect.Value) bool {
+	switch rv.Kind() {
+	case reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice:
+		return rv.IsNil()
+	default:
+		return false
+	}
+}
+
+func panicIfInvalidKey(key Key) {
+	for _, k := range key {
+		if len(k) == 0 {
+			encPanic(e("Key '%s' is not a valid table name. Key names "+
+				"cannot be empty.", key.maybeQuotedAll()))
+		}
+	}
+}
+
+func isValidKeyName(s string) bool {
+	return len(s) != 0
+}

vendor/github.com/BurntSushi/toml/encoding_types.go

@@ -0,0 +1,19 @@
+// +build go1.2
+
+package toml
+
+// In order to support Go 1.1, we define our own TextMarshaler and
+// TextUnmarshaler types. For Go 1.2+, we just alias them with the
+// standard library interfaces.
+
+import (
+	"encoding"
+)
+
+// TextMarshaler is a synonym for encoding.TextMarshaler. It is defined here
+// so that Go 1.1 can be supported.
+type TextMarshaler encoding.TextMarshaler
+
+// TextUnmarshaler is a synonym for encoding.TextUnmarshaler. It is defined
+// here so that Go 1.1 can be supported.
+type TextUnmarshaler encoding.TextUnmarshaler

vendor/github.com/BurntSushi/toml/encoding_types_1.1.go

@@ -0,0 +1,18 @@
+// +build !go1.2
+
+package toml
+
+// These interfaces were introduced in Go 1.2, so we add them manually when
+// compiling for Go 1.1.
+
+// TextMarshaler is a synonym for encoding.TextMarshaler. It is defined here
+// so that Go 1.1 can be supported.
+type TextMarshaler interface {
+	MarshalText() (text []byte, err error)
+}
+
+// TextUnmarshaler is a synonym for encoding.TextUnmarshaler. It is defined
+// here so that Go 1.1 can be supported.
+type TextUnmarshaler interface {
+	UnmarshalText(text []byte) error
+}

vendor/github.com/BurntSushi/toml/lex.go

@@ -0,0 +1,953 @@
+package toml
+
+import (
+	"fmt"
+	"strings"
+	"unicode"
+	"unicode/utf8"
+)
+
+type itemType int
+
+const (
+	itemError itemType = iota
+	itemNIL            // used in the parser to indicate no type
+	itemEOF
+	itemText
+	itemString
+	itemRawString
+	itemMultilineString
+	itemRawMultilineString
+	itemBool
+	itemInteger
+	itemFloat
+	itemDatetime
+	itemArray // the start of an array
+	itemArrayEnd
+	itemTableStart
+	itemTableEnd
+	itemArrayTableStart
+	itemArrayTableEnd
+	itemKeyStart
+	itemCommentStart
+	itemInlineTableStart
+	itemInlineTableEnd
+)
+
+const (
+	eof              = 0
+	comma            = ','
+	tableStart       = '['
+	tableEnd         = ']'
+	arrayTableStart  = '['
+	arrayTableEnd    = ']'
+	tableSep         = '.'
+	keySep           = '='
+	arrayStart       = '['
+	arrayEnd         = ']'
+	commentStart     = '#'
+	stringStart      = '"'
+	stringEnd        = '"'
+	rawStringStart   = '\''
+	rawStringEnd     = '\''
+	inlineTableStart = '{'
+	inlineTableEnd   = '}'
+)
+
+type stateFn func(lx *lexer) stateFn
+
+type lexer struct {
+	input string
+	start int
+	pos   int
+	line  int
+	state stateFn
+	items chan item
+
+	// Allow for backing up up to three runes.
+	// This is necessary because TOML contains 3-rune tokens (""" and ''').
+	prevWidths [3]int
+	nprev      int // how many of prevWidths are in use
+	// If we emit an eof, we can still back up, but it is not OK to call
+	// next again.
+	atEOF bool
+
+	// A stack of state functions used to maintain context.
+	// The idea is to reuse parts of the state machine in various places.
+	// For example, values can appear at the top level or within arbitrarily
+	// nested arrays. The last state on the stack is used after a value has
+	// been lexed. Similarly for comments.
+	stack []stateFn
+}
+
+type item struct {
+	typ  itemType
+	val  string
+	line int
+}
+
+func (lx *lexer) nextItem() item {
+	for {
+		select {
+		case item := <-lx.items:
+			return item
+		default:
+			lx.state = lx.state(lx)
+		}
+	}
+}
+
+func lex(input string) *lexer {
+	lx := &lexer{
+		input: input,
+		state: lexTop,
+		line:  1,
+		items: make(chan item, 10),
+		stack: make([]stateFn, 0, 10),
+	}
+	return lx
+}
+
+func (lx *lexer) push(state stateFn) {
+	lx.stack = append(lx.stack, state)
+}
+
+func (lx *lexer) pop() stateFn {
+	if len(lx.stack) == 0 {
+		return lx.errorf("BUG in lexer: no states to pop")
+	}
+	last := lx.stack[len(lx.stack)-1]
+	lx.stack = lx.stack[0 : len(lx.stack)-1]
+	return last
+}
+
+func (lx *lexer) current() string {
+	return lx.input[lx.start:lx.pos]
+}
+
+func (lx *lexer) emit(typ itemType) {
+	lx.items <- item{typ, lx.current(), lx.line}
+	lx.start = lx.pos
+}
+
+func (lx *lexer) emitTrim(typ itemType) {
+	lx.items <- item{typ, strings.TrimSpace(lx.current()), lx.line}
+	lx.start = lx.pos
+}
+
+func (lx *lexer) next() (r rune) {
+	if lx.atEOF {
+		panic("next called after EOF")
+	}
+	if lx.pos >= len(lx.input) {
+		lx.atEOF = true
+		return eof
+	}
+
+	if lx.input[lx.pos] == '\n' {
+		lx.line++
+	}
+	lx.prevWidths[2] = lx.prevWidths[1]
+	lx.prevWidths[1] = lx.prevWidths[0]
+	if lx.nprev < 3 {
+		lx.nprev++
+	}
+	r, w := utf8.DecodeRuneInString(lx.input[lx.pos:])
+	lx.prevWidths[0] = w
+	lx.pos += w
+	return r
+}
+
+// ignore skips over the pending input before this point.
+func (lx *lexer) ignore() {
+	lx.start = lx.pos
+}
+
+// backup steps back one rune. Can be called only twice between calls to next.
+func (lx *lexer) backup() {
+	if lx.atEOF {
+		lx.atEOF = false
+		return
+	}
+	if lx.nprev < 1 {
+		panic("backed up too far")
+	}
+	w := lx.prevWidths[0]
+	lx.prevWidths[0] = lx.prevWidths[1]
+	lx.prevWidths[1] = lx.prevWidths[2]
+	lx.nprev--
+	lx.pos -= w
+	if lx.pos < len(lx.input) && lx.input[lx.pos] == '\n' {
+		lx.line--
+	}
+}
+
+// accept consumes the next rune if it's equal to `valid`.
+func (lx *lexer) accept(valid rune) bool {
+	if lx.next() == valid {
+		return true
+	}
+	lx.backup()
+	return false
+}
+
+// peek returns but does not consume the next rune in the input.
+func (lx *lexer) peek() rune {
+	r := lx.next()
+	lx.backup()
+	return r
+}
+
+// skip ignores all input that matches the given predicate.
+func (lx *lexer) skip(pred func(rune) bool) {
+	for {
+		r := lx.next()
+		if pred(r) {
+			continue
+		}
+		lx.backup()
+		lx.ignore()
+		return
+	}
+}
+
+// errorf stops all lexing by emitting an error and returning `nil`.
+// Note that any value that is a character is escaped if it's a special
+// character (newlines, tabs, etc.).
+func (lx *lexer) errorf(format string, values ...interface{}) stateFn {
+	lx.items <- item{
+		itemError,
+		fmt.Sprintf(format, values...),
+		lx.line,
+	}
+	return nil
+}
+
+// lexTop consumes elements at the top level of TOML data.
+func lexTop(lx *lexer) stateFn {
+	r := lx.next()
+	if isWhitespace(r) || isNL(r) {
+		return lexSkip(lx, lexTop)
+	}
+	switch r {
+	case commentStart:
+		lx.push(lexTop)
+		return lexCommentStart
+	case tableStart:
+		return lexTableStart
+	case eof:
+		if lx.pos > lx.start {
+			return lx.errorf("unexpected EOF")
+		}
+		lx.emit(itemEOF)
+		return nil
+	}
+
+	// At this point, the only valid item can be a key, so we back up
+	// and let the key lexer do the rest.
+	lx.backup()
+	lx.push(lexTopEnd)
+	return lexKeyStart
+}
+
+// lexTopEnd is entered whenever a top-level item has been consumed. (A value
+// or a table.) It must see only whitespace, and will turn back to lexTop
+// upon a newline. If it sees EOF, it will quit the lexer successfully.
+func lexTopEnd(lx *lexer) stateFn {
+	r := lx.next()
+	switch {
+	case r == commentStart:
+		// a comment will read to a newline for us.
+		lx.push(lexTop)
+		return lexCommentStart
+	case isWhitespace(r):
+		return lexTopEnd
+	case isNL(r):
+		lx.ignore()
+		return lexTop
+	case r == eof:
+		lx.emit(itemEOF)
+		return nil
+	}
+	return lx.errorf("expected a top-level item to end with a newline, "+
+		"comment, or EOF, but got %q instead", r)
+}
+
+// lexTable lexes the beginning of a table. Namely, it makes sure that
+// it starts with a character other than '.' and ']'.
+// It assumes that '[' has already been consumed.
+// It also handles the case that this is an item in an array of tables.
+// e.g., '[[name]]'.
+func lexTableStart(lx *lexer) stateFn {
+	if lx.peek() == arrayTableStart {
+		lx.next()
+		lx.emit(itemArrayTableStart)
+		lx.push(lexArrayTableEnd)
+	} else {
+		lx.emit(itemTableStart)
+		lx.push(lexTableEnd)
+	}
+	return lexTableNameStart
+}
+
+func lexTableEnd(lx *lexer) stateFn {
+	lx.emit(itemTableEnd)
+	return lexTopEnd
+}
+
+func lexArrayTableEnd(lx *lexer) stateFn {
+	if r := lx.next(); r != arrayTableEnd {
+		return lx.errorf("expected end of table array name delimiter %q, "+
+			"but got %q instead", arrayTableEnd, r)
+	}
+	lx.emit(itemArrayTableEnd)
+	return lexTopEnd
+}
+
+func lexTableNameStart(lx *lexer) stateFn {
+	lx.skip(isWhitespace)
+	switch r := lx.peek(); {
+	case r == tableEnd || r == eof:
+		return lx.errorf("unexpected end of table name " +
+			"(table names cannot be empty)")
+	case r == tableSep:
+		return lx.errorf("unexpected table separator " +
+			"(table names cannot be empty)")
+	case r == stringStart || r == rawStringStart:
+		lx.ignore()
+		lx.push(lexTableNameEnd)
+		return lexValue // reuse string lexing
+	default:
+		return lexBareTableName
+	}
+}
+
+// lexBareTableName lexes the name of a table. It assumes that at least one
+// valid character for the table has already been read.
+func lexBareTableName(lx *lexer) stateFn {
+	r := lx.next()
+	if isBareKeyChar(r) {
+		return lexBareTableName
+	}
+	lx.backup()
+	lx.emit(itemText)
+	return lexTableNameEnd
+}
+
+// lexTableNameEnd reads the end of a piece of a table name, optionally
+// consuming whitespace.
+func lexTableNameEnd(lx *lexer) stateFn {
+	lx.skip(isWhitespace)
+	switch r := lx.next(); {
+	case isWhitespace(r):
+		return lexTableNameEnd
+	case r == tableSep:
+		lx.ignore()
+		return lexTableNameStart
+	case r == tableEnd:
+		return lx.pop()
+	default:
+		return lx.errorf("expected '.' or ']' to end table name, "+
+			"but got %q instead", r)
+	}
+}
+
+// lexKeyStart consumes a key name up until the first non-whitespace character.
+// lexKeyStart will ignore whitespace.
+func lexKeyStart(lx *lexer) stateFn {
+	r := lx.peek()
+	switch {
+	case r == keySep:
+		return lx.errorf("unexpected key separator %q", keySep)
+	case isWhitespace(r) || isNL(r):
+		lx.next()
+		return lexSkip(lx, lexKeyStart)
+	case r == stringStart || r == rawStringStart:
+		lx.ignore()
+		lx.emit(itemKeyStart)
+		lx.push(lexKeyEnd)
+		return lexValue // reuse string lexing
+	default:
+		lx.ignore()
+		lx.emit(itemKeyStart)
+		return lexBareKey
+	}
+}
+
+// lexBareKey consumes the text of a bare key. Assumes that the first character
+// (which is not whitespace) has not yet been consumed.
+func lexBareKey(lx *lexer) stateFn {
+	switch r := lx.next(); {
+	case isBareKeyChar(r):
+		return lexBareKey
+	case isWhitespace(r):
+		lx.backup()
+		lx.emit(itemText)
+		return lexKeyEnd
+	case r == keySep:
+		lx.backup()
+		lx.emit(itemText)
+		return lexKeyEnd
+	default:
+		return lx.errorf("bare keys cannot contain %q", r)
+	}
+}
+
+// lexKeyEnd consumes the end of a key and trims whitespace (up to the key
+// separator).
+func lexKeyEnd(lx *lexer) stateFn {
+	switch r := lx.next(); {
+	case r == keySep:
+		return lexSkip(lx, lexValue)
+	case isWhitespace(r):
+		return lexSkip(lx, lexKeyEnd)
+	default:
+		return lx.errorf("expected key separator %q, but got %q instead",
+			keySep, r)
+	}
+}
+
+// lexValue starts the consumption of a value anywhere a value is expected.
+// lexValue will ignore whitespace.
+// After a value is lexed, the last state on the next is popped and returned.
+func lexValue(lx *lexer) stateFn {
+	// We allow whitespace to precede a value, but NOT newlines.
+	// In array syntax, the array states are responsible for ignoring newlines.
+	r := lx.next()
+	switch {
+	case isWhitespace(r):
+		return lexSkip(lx, lexValue)
+	case isDigit(r):
+		lx.backup() // avoid an extra state and use the same as above
+		return lexNumberOrDateStart
+	}
+	switch r {
+	case arrayStart:
+		lx.ignore()
+		lx.emit(itemArray)
+		return lexArrayValue
+	case inlineTableStart:
+		lx.ignore()
+		lx.emit(itemInlineTableStart)
+		return lexInlineTableValue
+	case stringStart:
+		if lx.accept(stringStart) {
+			if lx.accept(stringStart) {
+				lx.ignore() // Ignore """
+				return lexMultilineString
+			}
+			lx.backup()
+		}
+		lx.ignore() // ignore the '"'
+		return lexString
+	case rawStringStart:
+		if lx.accept(rawStringStart) {
+			if lx.accept(rawStringStart) {
+				lx.ignore() // Ignore """
+				return lexMultilineRawString
+			}
+			lx.backup()
+		}
+		lx.ignore() // ignore the "'"
+		return lexRawString
+	case '+', '-':
+		return lexNumberStart
+	case '.': // special error case, be kind to users
+		return lx.errorf("floats must start with a digit, not '.'")
+	}
+	if unicode.IsLetter(r) {
+		// Be permissive here; lexBool will give a nice error if the
+		// user wrote something like
+		//   x = foo
+		// (i.e. not 'true' or 'false' but is something else word-like.)
+		lx.backup()
+		return lexBool
+	}
+	return lx.errorf("expected value but found %q instead", r)
+}
+
+// lexArrayValue consumes one value in an array. It assumes that '[' or ','
+// have already been consumed. All whitespace and newlines are ignored.
+func lexArrayValue(lx *lexer) stateFn {
+	r := lx.next()
+	switch {
+	case isWhitespace(r) || isNL(r):
+		return lexSkip(lx, lexArrayValue)
+	case r == commentStart:
+		lx.push(lexArrayValue)
+		return lexCommentStart
+	case r == comma:
+		return lx.errorf("unexpected comma")
+	case r == arrayEnd:
+		// NOTE(caleb): The spec isn't clear about whether you can have
+		// a trailing comma or not, so we'll allow it.
+		return lexArrayEnd
+	}
+
+	lx.backup()
+	lx.push(lexArrayValueEnd)
+	return lexValue
+}
+
+// lexArrayValueEnd consumes everything between the end of an array value and
+// the next value (or the end of the array): it ignores whitespace and newlines
+// and expects either a ',' or a ']'.
+func lexArrayValueEnd(lx *lexer) stateFn {
+	r := lx.next()
+	switch {
+	case isWhitespace(r) || isNL(r):
+		return lexSkip(lx, lexArrayValueEnd)
+	case r == commentStart:
+		lx.push(lexArrayValueEnd)
+		return lexCommentStart
+	case r == comma:
+		lx.ignore()
+		return lexArrayValue // move on to the next value
+	case r == arrayEnd:
+		return lexArrayEnd
+	}
+	return lx.errorf(
+		"expected a comma or array terminator %q, but got %q instead",
+		arrayEnd, r,
+	)
+}
+
+// lexArrayEnd finishes the lexing of an array.
+// It assumes that a ']' has just been consumed.
+func lexArrayEnd(lx *lexer) stateFn {
+	lx.ignore()
+	lx.emit(itemArrayEnd)
+	return lx.pop()
+}
+
+// lexInlineTableValue consumes one key/value pair in an inline table.
+// It assumes that '{' or ',' have already been consumed. Whitespace is ignored.
+func lexInlineTableValue(lx *lexer) stateFn {
+	r := lx.next()
+	switch {
+	case isWhitespace(r):
+		return lexSkip(lx, lexInlineTableValue)
+	case isNL(r):
+		return lx.errorf("newlines not allowed within inline tables")
+	case r == commentStart:
+		lx.push(lexInlineTableValue)
+		return lexCommentStart
+	case r == comma:
+		return lx.errorf("unexpected comma")
+	case r == inlineTableEnd:
+		return lexInlineTableEnd
+	}
+	lx.backup()
+	lx.push(lexInlineTableValueEnd)
+	return lexKeyStart
+}
+
+// lexInlineTableValueEnd consumes everything between the end of an inline table
+// key/value pair and the next pair (or the end of the table):
+// it ignores whitespace and expects either a ',' or a '}'.
+func lexInlineTableValueEnd(lx *lexer) stateFn {
+	r := lx.next()
+	switch {
+	case isWhitespace(r):
+		return lexSkip(lx, lexInlineTableValueEnd)
+	case isNL(r):
+		return lx.errorf("newlines not allowed within inline tables")
+	case r == commentStart:
+		lx.push(lexInlineTableValueEnd)
+		return lexCommentStart
+	case r == comma:
+		lx.ignore()
+		return lexInlineTableValue
+	case r == inlineTableEnd:
+		return lexInlineTableEnd
+	}
+	return lx.errorf("expected a comma or an inline table terminator %q, "+
+		"but got %q instead", inlineTableEnd, r)
+}
+
+// lexInlineTableEnd finishes the lexing of an inline table.
+// It assumes that a '}' has just been consumed.
+func lexInlineTableEnd(lx *lexer) stateFn {
+	lx.ignore()
+	lx.emit(itemInlineTableEnd)
+	return lx.pop()
+}
+
+// lexString consumes the inner contents of a string. It assumes that the
+// beginning '"' has already been consumed and ignored.
+func lexString(lx *lexer) stateFn {
+	r := lx.next()
+	switch {
+	case r == eof:
+		return lx.errorf("unexpected EOF")
+	case isNL(r):
+		return lx.errorf("strings cannot contain newlines")
+	case r == '\\':
+		lx.push(lexString)
+		return lexStringEscape
+	case r == stringEnd:
+		lx.backup()
+		lx.emit(itemString)
+		lx.next()
+		lx.ignore()
+		return lx.pop()
+	}
+	return lexString
+}
+
+// lexMultilineString consumes the inner contents of a string. It assumes that
+// the beginning '"""' has already been consumed and ignored.
+func lexMultilineString(lx *lexer) stateFn {
+	switch lx.next() {
+	case eof:
+		return lx.errorf("unexpected EOF")
+	case '\\':
+		return lexMultilineStringEscape
+	case stringEnd:
+		if lx.accept(stringEnd) {
+			if lx.accept(stringEnd) {
+				lx.backup()
+				lx.backup()
+				lx.backup()
+				lx.emit(itemMultilineString)
+				lx.next()
+				lx.next()
+				lx.next()
+				lx.ignore()
+				return lx.pop()
+			}
+			lx.backup()
+		}
+	}
+	return lexMultilineString
+}
+
+// lexRawString consumes a raw string. Nothing can be escaped in such a string.
+// It assumes that the beginning "'" has already been consumed and ignored.
+func lexRawString(lx *lexer) stateFn {
+	r := lx.next()
+	switch {
+	case r == eof:
+		return lx.errorf("unexpected EOF")
+	case isNL(r):
+		return lx.errorf("strings cannot contain newlines")
+	case r == rawStringEnd:
+		lx.backup()
+		lx.emit(itemRawString)
+		lx.next()
+		lx.ignore()
+		return lx.pop()
+	}
+	return lexRawString
+}
+
+// lexMultilineRawString consumes a raw string. Nothing can be escaped in such
+// a string. It assumes that the beginning "'''" has already been consumed and
+// ignored.
+func lexMultilineRawString(lx *lexer) stateFn {
+	switch lx.next() {
+	case eof:
+		return lx.errorf("unexpected EOF")
+	case rawStringEnd:
+		if lx.accept(rawStringEnd) {
+			if lx.accept(rawStringEnd) {
+				lx.backup()
+				lx.backup()
+				lx.backup()
+				lx.emit(itemRawMultilineString)
+				lx.next()
+				lx.next()
+				lx.next()
+				lx.ignore()
+				return lx.pop()
+			}
+			lx.backup()
+		}
+	}
+	return lexMultilineRawString
+}
+
+// lexMultilineStringEscape consumes an escaped character. It assumes that the
+// preceding '\\' has already been consumed.
+func lexMultilineStringEscape(lx *lexer) stateFn {
+	// Handle the special case first:
+	if isNL(lx.next()) {
+		return lexMultilineString
+	}
+	lx.backup()
+	lx.push(lexMultilineString)
+	return lexStringEscape(lx)
+}
+
+func lexStringEscape(lx *lexer) stateFn {
+	r := lx.next()
+	switch r {
+	case 'b':
+		fallthrough
+	case 't':
+		fallthrough
+	case 'n':
+		fallthrough
+	case 'f':
+		fallthrough
+	case 'r':
+		fallthrough
+	case '"':
+		fallthrough
+	case '\\':
+		return lx.pop()
+	case 'u':
+		return lexShortUnicodeEscape
+	case 'U':
+		return lexLongUnicodeEscape
+	}
+	return lx.errorf("invalid escape character %q; only the following "+
+		"escape characters are allowed: "+
+		`\b, \t, \n, \f, \r, \", \\, \uXXXX, and \UXXXXXXXX`, r)
+}
+
+func lexShortUnicodeEscape(lx *lexer) stateFn {
+	var r rune
+	for i := 0; i < 4; i++ {
+		r = lx.next()
+		if !isHexadecimal(r) {
+			return lx.errorf(`expected four hexadecimal digits after '\u', `+
+				"but got %q instead", lx.current())
+		}
+	}
+	return lx.pop()
+}
+
+func lexLongUnicodeEscape(lx *lexer) stateFn {
+	var r rune
+	for i := 0; i < 8; i++ {
+		r = lx.next()
+		if !isHexadecimal(r) {
+			return lx.errorf(`expected eight hexadecimal digits after '\U', `+
+				"but got %q instead", lx.current())
+		}
+	}
+	return lx.pop()
+}
+
+// lexNumberOrDateStart consumes either an integer, a float, or datetime.
+func lexNumberOrDateStart(lx *lexer) stateFn {
+	r := lx.next()
+	if isDigit(r) {
+		return lexNumberOrDate
+	}
+	switch r {
+	case '_':
+		return lexNumber
+	case 'e', 'E':
+		return lexFloat
+	case '.':
+		return lx.errorf("floats must start with a digit, not '.'")
+	}
+	return lx.errorf("expected a digit but got %q", r)
+}
+
+// lexNumberOrDate consumes either an integer, float or datetime.
+func lexNumberOrDate(lx *lexer) stateFn {
+	r := lx.next()
+	if isDigit(r) {
+		return lexNumberOrDate
+	}
+	switch r {
+	case '-':
+		return lexDatetime
+	case '_':
+		return lexNumber
+	case '.', 'e', 'E':
+		return lexFloat
+	}
+
+	lx.backup()
+	lx.emit(itemInteger)
+	return lx.pop()
+}
+
+// lexDatetime consumes a Datetime, to a first approximation.
+// The parser validates that it matches one of the accepted formats.
+func lexDatetime(lx *lexer) stateFn {
+	r := lx.next()
+	if isDigit(r) {
+		return lexDatetime
+	}
+	switch r {
+	case '-', 'T', ':', '.', 'Z', '+':
+		return lexDatetime
+	}
+
+	lx.backup()
+	lx.emit(itemDatetime)
+	return lx.pop()
+}
+
+// lexNumberStart consumes either an integer or a float. It assumes that a sign
+// has already been read, but that *no* digits have been consumed.
+// lexNumberStart will move to the appropriate integer or float states.
+func lexNumberStart(lx *lexer) stateFn {
+	// We MUST see a digit. Even floats have to start with a digit.
+	r := lx.next()
+	if !isDigit(r) {
+		if r == '.' {
+			return lx.errorf("floats must start with a digit, not '.'")
+		}
+		return lx.errorf("expected a digit but got %q", r)
+	}
+	return lexNumber
+}
+
+// lexNumber consumes an integer or a float after seeing the first digit.
+func lexNumber(lx *lexer) stateFn {
+	r := lx.next()
+	if isDigit(r) {
+		return lexNumber
+	}
+	switch r {
+	case '_':
+		return lexNumber
+	case '.', 'e', 'E':
+		return lexFloat
+	}
+
+	lx.backup()
+	lx.emit(itemInteger)
+	return lx.pop()
+}
+
+// lexFloat consumes the elements of a float. It allows any sequence of
+// float-like characters, so floats emitted by the lexer are only a first
+// approximation and must be validated by the parser.
+func lexFloat(lx *lexer) stateFn {
+	r := lx.next()
+	if isDigit(r) {
+		return lexFloat
+	}
+	switch r {
+	case '_', '.', '-', '+', 'e', 'E':
+		return lexFloat
+	}
+
+	lx.backup()
+	lx.emit(itemFloat)
+	return lx.pop()
+}
+
+// lexBool consumes a bool string: 'true' or 'false.
+func lexBool(lx *lexer) stateFn {
+	var rs []rune
+	for {
+		r := lx.next()
+		if !unicode.IsLetter(r) {
+			lx.backup()
+			break
+		}
+		rs = append(rs, r)
+	}
+	s := string(rs)
+	switch s {
+	case "true", "false":
+		lx.emit(itemBool)
+		return lx.pop()
+	}
+	return lx.errorf("expected value but found %q instead", s)
+}
+
+// lexCommentStart begins the lexing of a comment. It will emit
+// itemCommentStart and consume no characters, passing control to lexComment.
+func lexCommentStart(lx *lexer) stateFn {
+	lx.ignore()
+	lx.emit(itemCommentStart)
+	return lexComment
+}
+
+// lexComment lexes an entire comment. It assumes that '#' has been consumed.
+// It will consume *up to* the first newline character, and pass control
+// back to the last state on the stack.
+func lexComment(lx *lexer) stateFn {
+	r := lx.peek()
+	if isNL(r) || r == eof {
+		lx.emit(itemText)
+		return lx.pop()
+	}
+	lx.next()
+	return lexComment
+}
+
+// lexSkip ignores all slurped input and moves on to the next state.
+func lexSkip(lx *lexer, nextState stateFn) stateFn {
+	return func(lx *lexer) stateFn {
+		lx.ignore()
+		return nextState
+	}
+}
+
+// isWhitespace returns true if `r` is a whitespace character according
+// to the spec.
+func isWhitespace(r rune) bool {
+	return r == '\t' || r == ' '
+}
+
+func isNL(r rune) bool {
+	return r == '\n' || r == '\r'
+}
+
+func isDigit(r rune) bool {
+	return r >= '0' && r <= '9'
+}
+
+func isHexadecimal(r rune) bool {
+	return (r >= '0' && r <= '9') ||
+		(r >= 'a' && r <= 'f') ||
+		(r >= 'A' && r <= 'F')
+}
+
+func isBareKeyChar(r rune) bool {
+	return (r >= 'A' && r <= 'Z') ||
+		(r >= 'a' && r <= 'z') ||
+		(r >= '0' && r <= '9') ||
+		r == '_' ||
+		r == '-'
+}
+
+func (itype itemType) String() string {
+	switch itype {
+	case itemError:
+		return "Error"
+	case itemNIL:
+		return "NIL"
+	case itemEOF:
+		return "EOF"
+	case itemText:
+		return "Text"
+	case itemString, itemRawString, itemMultilineString, itemRawMultilineString:
+		return "String"
+	case itemBool:
+		return "Bool"
+	case itemInteger:
+		return "Integer"
+	case itemFloat:
+		return "Float"
+	case itemDatetime:
+		return "DateTime"
+	case itemTableStart:
+		return "TableStart"
+	case itemTableEnd:
+		return "TableEnd"
+	case itemKeyStart:
+		return "KeyStart"
+	case itemArray:
+		return "Array"
+	case itemArrayEnd:
+		return "ArrayEnd"
+	case itemCommentStart:
+		return "CommentStart"
+	}
+	panic(fmt.Sprintf("BUG: Unknown type '%d'.", int(itype)))
+}
+
+func (item item) String() string {
+	return fmt.Sprintf("(%s, %s)", item.typ.String(), item.val)
+}

vendor/github.com/BurntSushi/toml/parse.go

@@ -0,0 +1,592 @@
+package toml
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+	"time"
+	"unicode"
+	"unicode/utf8"
+)
+
+type parser struct {
+	mapping map[string]interface{}
+	types   map[string]tomlType
+	lx      *lexer
+
+	// A list of keys in the order that they appear in the TOML data.
+	ordered []Key
+
+	// the full key for the current hash in scope
+	context Key
+
+	// the base key name for everything except hashes
+	currentKey string
+
+	// rough approximation of line number
+	approxLine int
+
+	// A map of 'key.group.names' to whether they were created implicitly.
+	implicits map[string]bool
+}
+
+type parseError string
+
+func (pe parseError) Error() string {
+	return string(pe)
+}
+
+func parse(data string) (p *parser, err error) {
+	defer func() {
+		if r := recover(); r != nil {
+			var ok bool
+			if err, ok = r.(parseError); ok {
+				return
+			}
+			panic(r)
+		}
+	}()
+
+	p = &parser{
+		mapping:   make(map[string]interface{}),
+		types:     make(map[string]tomlType),
+		lx:        lex(data),
+		ordered:   make([]Key, 0),
+		implicits: make(map[string]bool),
+	}
+	for {
+		item := p.next()
+		if item.typ == itemEOF {
+			break
+		}
+		p.topLevel(item)
+	}
+
+	return p, nil
+}
+
+func (p *parser) panicf(format string, v ...interface{}) {
+	msg := fmt.Sprintf("Near line %d (last key parsed '%s'): %s",
+		p.approxLine, p.current(), fmt.Sprintf(format, v...))
+	panic(parseError(msg))
+}
+
+func (p *parser) next() item {
+	it := p.lx.nextItem()
+	if it.typ == itemError {
+		p.panicf("%s", it.val)
+	}
+	return it
+}
+
+func (p *parser) bug(format string, v ...interface{}) {
+	panic(fmt.Sprintf("BUG: "+format+"\n\n", v...))
+}
+
+func (p *parser) expect(typ itemType) item {
+	it := p.next()
+	p.assertEqual(typ, it.typ)
+	return it
+}
+
+func (p *parser) assertEqual(expected, got itemType) {
+	if expected != got {
+		p.bug("Expected '%s' but got '%s'.", expected, got)
+	}
+}
+
+func (p *parser) topLevel(item item) {
+	switch item.typ {
+	case itemCommentStart:
+		p.approxLine = item.line
+		p.expect(itemText)
+	case itemTableStart:
+		kg := p.next()
+		p.approxLine = kg.line
+
+		var key Key
+		for ; kg.typ != itemTableEnd && kg.typ != itemEOF; kg = p.next() {
+			key = append(key, p.keyString(kg))
+		}
+		p.assertEqual(itemTableEnd, kg.typ)
+
+		p.establishContext(key, false)
+		p.setType("", tomlHash)
+		p.ordered = append(p.ordered, key)
+	case itemArrayTableStart:
+		kg := p.next()
+		p.approxLine = kg.line
+
+		var key Key
+		for ; kg.typ != itemArrayTableEnd && kg.typ != itemEOF; kg = p.next() {
+			key = append(key, p.keyString(kg))
+		}
+		p.assertEqual(itemArrayTableEnd, kg.typ)
+
+		p.establishContext(key, true)
+		p.setType("", tomlArrayHash)
+		p.ordered = append(p.ordered, key)
+	case itemKeyStart:
+		kname := p.next()
+		p.approxLine = kname.line
+		p.currentKey = p.keyString(kname)
+
+		val, typ := p.value(p.next())
+		p.setValue(p.currentKey, val)
+		p.setType(p.currentKey, typ)
+		p.ordered = append(p.ordered, p.context.add(p.currentKey))
+		p.currentKey = ""
+	default:
+		p.bug("Unexpected type at top level: %s", item.typ)
+	}
+}
+
+// Gets a string for a key (or part of a key in a table name).
+func (p *parser) keyString(it item) string {
+	switch it.typ {
+	case itemText:
+		return it.val
+	case itemString, itemMultilineString,
+		itemRawString, itemRawMultilineString:
+		s, _ := p.value(it)
+		return s.(string)
+	default:
+		p.bug("Unexpected key type: %s", it.typ)
+		panic("unreachable")
+	}
+}
+
+// value translates an expected value from the lexer into a Go value wrapped
+// as an empty interface.
+func (p *parser) value(it item) (interface{}, tomlType) {
+	switch it.typ {
+	case itemString:
+		return p.replaceEscapes(it.val), p.typeOfPrimitive(it)
+	case itemMultilineString:
+		trimmed := stripFirstNewline(stripEscapedWhitespace(it.val))
+		return p.replaceEscapes(trimmed), p.typeOfPrimitive(it)
+	case itemRawString:
+		return it.val, p.typeOfPrimitive(it)
+	case itemRawMultilineString:
+		return stripFirstNewline(it.val), p.typeOfPrimitive(it)
+	case itemBool:
+		switch it.val {
+		case "true":
+			return true, p.typeOfPrimitive(it)
+		case "false":
+			return false, p.typeOfPrimitive(it)
+		}
+		p.bug("Expected boolean value, but got '%s'.", it.val)
+	case itemInteger:
+		if !numUnderscoresOK(it.val) {
+			p.panicf("Invalid integer %q: underscores must be surrounded by digits",
+				it.val)
+		}
+		val := strings.Replace(it.val, "_", "", -1)
+		num, err := strconv.ParseInt(val, 10, 64)
+		if err != nil {
+			// Distinguish integer values. Normally, it'd be a bug if the lexer
+			// provides an invalid integer, but it's possible that the number is
+			// out of range of valid values (which the lexer cannot determine).
+			// So mark the former as a bug but the latter as a legitimate user
+			// error.
+			if e, ok := err.(*strconv.NumError); ok &&
+				e.Err == strconv.ErrRange {
+
+				p.panicf("Integer '%s' is out of the range of 64-bit "+
+					"signed integers.", it.val)
+			} else {
+				p.bug("Expected integer value, but got '%s'.", it.val)
+			}
+		}
+		return num, p.typeOfPrimitive(it)
+	case itemFloat:
+		parts := strings.FieldsFunc(it.val, func(r rune) bool {
+			switch r {
+			case '.', 'e', 'E':
+				return true
+			}
+			return false
+		})
+		for _, part := range parts {
+			if !numUnderscoresOK(part) {
+				p.panicf("Invalid float %q: underscores must be "+
+					"surrounded by digits", it.val)
+			}
+		}
+		if !numPeriodsOK(it.val) {
+			// As a special case, numbers like '123.' or '1.e2',
+			// which are valid as far as Go/strconv are concerned,
+			// must be rejected because TOML says that a fractional
+			// part consists of '.' followed by 1+ digits.
+			p.panicf("Invalid float %q: '.' must be followed "+
+				"by one or more digits", it.val)
+		}
+		val := strings.Replace(it.val, "_", "", -1)
+		num, err := strconv.ParseFloat(val, 64)
+		if err != nil {
+			if e, ok := err.(*strconv.NumError); ok &&
+				e.Err == strconv.ErrRange {
+
+				p.panicf("Float '%s' is out of the range of 64-bit "+
+					"IEEE-754 floating-point numbers.", it.val)
+			} else {
+				p.panicf("Invalid float value: %q", it.val)
+			}
+		}
+		return num, p.typeOfPrimitive(it)
+	case itemDatetime:
+		var t time.Time
+		var ok bool
+		var err error
+		for _, format := range []string{
+			"2006-01-02T15:04:05Z07:00",
+			"2006-01-02T15:04:05",
+			"2006-01-02",
+		} {
+			t, err = time.ParseInLocation(format, it.val, time.Local)
+			if err == nil {
+				ok = true
+				break
+			}
+		}
+		if !ok {
+			p.panicf("Invalid TOML Datetime: %q.", it.val)
+		}
+		return t, p.typeOfPrimitive(it)
+	case itemArray:
+		array := make([]interface{}, 0)
+		types := make([]tomlType, 0)
+
+		for it = p.next(); it.typ != itemArrayEnd; it = p.next() {
+			if it.typ == itemCommentStart {
+				p.expect(itemText)
+				continue
+			}
+
+			val, typ := p.value(it)
+			array = append(array, val)
+			types = append(types, typ)
+		}
+		return array, p.typeOfArray(types)
+	case itemInlineTableStart:
+		var (
+			hash         = make(map[string]interface{})
+			outerContext = p.context
+			outerKey     = p.currentKey
+		)
+
+		p.context = append(p.context, p.currentKey)
+		p.currentKey = ""
+		for it := p.next(); it.typ != itemInlineTableEnd; it = p.next() {
+			if it.typ != itemKeyStart {
+				p.bug("Expected key start but instead found %q, around line %d",
+					it.val, p.approxLine)
+			}
+			if it.typ == itemCommentStart {
+				p.expect(itemText)
+				continue
+			}
+
+			// retrieve key
+			k := p.next()
+			p.approxLine = k.line
+			kname := p.keyString(k)
+
+			// retrieve value
+			p.currentKey = kname
+			val, typ := p.value(p.next())
+			// make sure we keep metadata up to date
+			p.setType(kname, typ)
+			p.ordered = append(p.ordered, p.context.add(p.currentKey))
+			hash[kname] = val
+		}
+		p.context = outerContext
+		p.currentKey = outerKey
+		return hash, tomlHash
+	}
+	p.bug("Unexpected value type: %s", it.typ)
+	panic("unreachable")
+}
+
+// numUnderscoresOK checks whether each underscore in s is surrounded by
+// characters that are not underscores.
+func numUnderscoresOK(s string) bool {
+	accept := false
+	for _, r := range s {
+		if r == '_' {
+			if !accept {
+				return false
+			}
+			accept = false
+			continue
+		}
+		accept = true
+	}
+	return accept
+}
+
+// numPeriodsOK checks whether every period in s is followed by a digit.
+func numPeriodsOK(s string) bool {
+	period := false
+	for _, r := range s {
+		if period && !isDigit(r) {
+			return false
+		}
+		period = r == '.'
+	}
+	return !period
+}
+
+// establishContext sets the current context of the parser,
+// where the context is either a hash or an array of hashes. Which one is
+// set depends on the value of the `array` parameter.
+//
+// Establishing the context also makes sure that the key isn't a duplicate, and
+// will create implicit hashes automatically.
+func (p *parser) establishContext(key Key, array bool) {
+	var ok bool
+
+	// Always start at the top level and drill down for our context.
+	hashContext := p.mapping
+	keyContext := make(Key, 0)
+
+	// We only need implicit hashes for key[0:-1]
+	for _, k := range key[0 : len(key)-1] {
+		_, ok = hashContext[k]
+		keyContext = append(keyContext, k)
+
+		// No key? Make an implicit hash and move on.
+		if !ok {
+			p.addImplicit(keyContext)
+			hashContext[k] = make(map[string]interface{})
+		}
+
+		// If the hash context is actually an array of tables, then set
+		// the hash context to the last element in that array.
+		//
+		// Otherwise, it better be a table, since this MUST be a key group (by
+		// virtue of it not being the last element in a key).
+		switch t := hashContext[k].(type) {
+		case []map[string]interface{}:
+			hashContext = t[len(t)-1]
+		case map[string]interface{}:
+			hashContext = t
+		default:
+			p.panicf("Key '%s' was already created as a hash.", keyContext)
+		}
+	}
+
+	p.context = keyContext
+	if array {
+		// If this is the first element for this array, then allocate a new
+		// list of tables for it.
+		k := key[len(key)-1]
+		if _, ok := hashContext[k]; !ok {
+			hashContext[k] = make([]map[string]interface{}, 0, 5)
+		}
+
+		// Add a new table. But make sure the key hasn't already been used
+		// for something else.
+		if hash, ok := hashContext[k].([]map[string]interface{}); ok {
+			hashContext[k] = append(hash, make(map[string]interface{}))
+		} else {
+			p.panicf("Key '%s' was already created and cannot be used as "+
+				"an array.", keyContext)
+		}
+	} else {
+		p.setValue(key[len(key)-1], make(map[string]interface{}))
+	}
+	p.context = append(p.context, key[len(key)-1])
+}
+
+// setValue sets the given key to the given value in the current context.
+// It will make sure that the key hasn't already been defined, account for
+// implicit key groups.
+func (p *parser) setValue(key string, value interface{}) {
+	var tmpHash interface{}
+	var ok bool
+
+	hash := p.mapping
+	keyContext := make(Key, 0)
+	for _, k := range p.context {
+		keyContext = append(keyContext, k)
+		if tmpHash, ok = hash[k]; !ok {
+			p.bug("Context for key '%s' has not been established.", keyContext)
+		}
+		switch t := tmpHash.(type) {
+		case []map[string]interface{}:
+			// The context is a table of hashes. Pick the most recent table
+			// defined as the current hash.
+			hash = t[len(t)-1]
+		case map[string]interface{}:
+			hash = t
+		default:
+			p.bug("Expected hash to have type 'map[string]interface{}', but "+
+				"it has '%T' instead.", tmpHash)
+		}
+	}
+	keyContext = append(keyContext, key)
+
+	if _, ok := hash[key]; ok {
+		// Typically, if the given key has already been set, then we have
+		// to raise an error since duplicate keys are disallowed. However,
+		// it's possible that a key was previously defined implicitly. In this
+		// case, it is allowed to be redefined concretely. (See the
+		// `tests/valid/implicit-and-explicit-after.toml` test in `toml-test`.)
+		//
+		// But we have to make sure to stop marking it as an implicit. (So that
+		// another redefinition provokes an error.)
+		//
+		// Note that since it has already been defined (as a hash), we don't
+		// want to overwrite it. So our business is done.
+		if p.isImplicit(keyContext) {
+			p.removeImplicit(keyContext)
+			return
+		}
+
+		// Otherwise, we have a concrete key trying to override a previous
+		// key, which is *always* wrong.
+		p.panicf("Key '%s' has already been defined.", keyContext)
+	}
+	hash[key] = value
+}
+
+// setType sets the type of a particular value at a given key.
+// It should be called immediately AFTER setValue.
+//
+// Note that if `key` is empty, then the type given will be applied to the
+// current context (which is either a table or an array of tables).
+func (p *parser) setType(key string, typ tomlType) {
+	keyContext := make(Key, 0, len(p.context)+1)
+	for _, k := range p.context {
+		keyContext = append(keyContext, k)
+	}
+	if len(key) > 0 { // allow type setting for hashes
+		keyContext = append(keyContext, key)
+	}
+	p.types[keyContext.String()] = typ
+}
+
+// addImplicit sets the given Key as having been created implicitly.
+func (p *parser) addImplicit(key Key) {
+	p.implicits[key.String()] = true
+}
+
+// removeImplicit stops tagging the given key as having been implicitly
+// created.
+func (p *parser) removeImplicit(key Key) {
+	p.implicits[key.String()] = false
+}
+
+// isImplicit returns true if the key group pointed to by the key was created
+// implicitly.
+func (p *parser) isImplicit(key Key) bool {
+	return p.implicits[key.String()]
+}
+
+// current returns the full key name of the current context.
+func (p *parser) current() string {
+	if len(p.currentKey) == 0 {
+		return p.context.String()
+	}
+	if len(p.context) == 0 {
+		return p.currentKey
+	}
+	return fmt.Sprintf("%s.%s", p.context, p.currentKey)
+}
+
+func stripFirstNewline(s string) string {
+	if len(s) == 0 || s[0] != '\n' {
+		return s
+	}
+	return s[1:]
+}
+
+func stripEscapedWhitespace(s string) string {
+	esc := strings.Split(s, "\\\n")
+	if len(esc) > 1 {
+		for i := 1; i < len(esc); i++ {
+			esc[i] = strings.TrimLeftFunc(esc[i], unicode.IsSpace)
+		}
+	}
+	return strings.Join(esc, "")
+}
+
+func (p *parser) replaceEscapes(str string) string {
+	var replaced []rune
+	s := []byte(str)
+	r := 0
+	for r < len(s) {
+		if s[r] != '\\' {
+			c, size := utf8.DecodeRune(s[r:])
+			r += size
+			replaced = append(replaced, c)
+			continue
+		}
+		r += 1
+		if r >= len(s) {
+			p.bug("Escape sequence at end of string.")
+			return ""
+		}
+		switch s[r] {
+		default:
+			p.bug("Expected valid escape code after \\, but got %q.", s[r])
+			return ""
+		case 'b':
+			replaced = append(replaced, rune(0x0008))
+			r += 1
+		case 't':
+			replaced = append(replaced, rune(0x0009))
+			r += 1
+		case 'n':
+			replaced = append(replaced, rune(0x000A))
+			r += 1
+		case 'f':
+			replaced = append(replaced, rune(0x000C))
+			r += 1
+		case 'r':
+			replaced = append(replaced, rune(0x000D))
+			r += 1
+		case '"':
+			replaced = append(replaced, rune(0x0022))
+			r += 1
+		case '\\':
+			replaced = append(replaced, rune(0x005C))
+			r += 1
+		case 'u':
+			// At this point, we know we have a Unicode escape of the form
+			// `uXXXX` at [r, r+5). (Because the lexer guarantees this
+			// for us.)
+			escaped := p.asciiEscapeToUnicode(s[r+1 : r+5])
+			replaced = append(replaced, escaped)
+			r += 5
+		case 'U':
+			// At this point, we know we have a Unicode escape of the form
+			// `uXXXX` at [r, r+9). (Because the lexer guarantees this
+			// for us.)
+			escaped := p.asciiEscapeToUnicode(s[r+1 : r+9])
+			replaced = append(replaced, escaped)
+			r += 9
+		}
+	}
+	return string(replaced)
+}
+
+func (p *parser) asciiEscapeToUnicode(bs []byte) rune {
+	s := string(bs)
+	hex, err := strconv.ParseUint(strings.ToLower(s), 16, 32)
+	if err != nil {
+		p.bug("Could not parse '%s' as a hexadecimal number, but the "+
+			"lexer claims it's OK: %s", s, err)
+	}
+	if !utf8.ValidRune(rune(hex)) {
+		p.panicf("Escaped character '\\u%s' is not valid UTF-8.", s)
+	}
+	return rune(hex)
+}
+
+func isStringType(ty itemType) bool {
+	return ty == itemString || ty == itemMultilineString ||
+		ty == itemRawString || ty == itemRawMultilineString
+}

vendor/github.com/BurntSushi/toml/session.vim

@@ -0,0 +1 @@
+au BufWritePost *.go silent!make tags > /dev/null 2>&1

vendor/github.com/BurntSushi/toml/type_check.go

@@ -0,0 +1,91 @@
+package toml
+
+// tomlType represents any Go type that corresponds to a TOML type.
+// While the first draft of the TOML spec has a simplistic type system that
+// probably doesn't need this level of sophistication, we seem to be militating
+// toward adding real composite types.
+type tomlType interface {
+	typeString() string
+}
+
+// typeEqual accepts any two types and returns true if they are equal.
+func typeEqual(t1, t2 tomlType) bool {
+	if t1 == nil || t2 == nil {
+		return false
+	}
+	return t1.typeString() == t2.typeString()
+}
+
+func typeIsHash(t tomlType) bool {
+	return typeEqual(t, tomlHash) || typeEqual(t, tomlArrayHash)
+}
+
+type tomlBaseType string
+
+func (btype tomlBaseType) typeString() string {
+	return string(btype)
+}
+
+func (btype tomlBaseType) String() string {
+	return btype.typeString()
+}
+
+var (
+	tomlInteger   tomlBaseType = "Integer"
+	tomlFloat     tomlBaseType = "Float"
+	tomlDatetime  tomlBaseType = "Datetime"
+	tomlString    tomlBaseType = "String"
+	tomlBool      tomlBaseType = "Bool"
+	tomlArray     tomlBaseType = "Array"
+	tomlHash      tomlBaseType = "Hash"
+	tomlArrayHash tomlBaseType = "ArrayHash"
+)
+
+// typeOfPrimitive returns a tomlType of any primitive value in TOML.
+// Primitive values are: Integer, Float, Datetime, String and Bool.
+//
+// Passing a lexer item other than the following will cause a BUG message
+// to occur: itemString, itemBool, itemInteger, itemFloat, itemDatetime.
+func (p *parser) typeOfPrimitive(lexItem item) tomlType {
+	switch lexItem.typ {
+	case itemInteger:
+		return tomlInteger
+	case itemFloat:
+		return tomlFloat
+	case itemDatetime:
+		return tomlDatetime
+	case itemString:
+		return tomlString
+	case itemMultilineString:
+		return tomlString
+	case itemRawString:
+		return tomlString
+	case itemRawMultilineString:
+		return tomlString
+	case itemBool:
+		return tomlBool
+	}
+	p.bug("Cannot infer primitive type of lex item '%s'.", lexItem)
+	panic("unreachable")
+}
+
+// typeOfArray returns a tomlType for an array given a list of types of its
+// values.
+//
+// In the current spec, if an array is homogeneous, then its type is always
+// "Array". If the array is not homogeneous, an error is generated.
+func (p *parser) typeOfArray(types []tomlType) tomlType {
+	// Empty arrays are cool.
+	if len(types) == 0 {
+		return tomlArray
+	}
+
+	theType := types[0]
+	for _, t := range types[1:] {
+		if !typeEqual(theType, t) {
+			p.panicf("Array contains values of type '%s' and '%s', but "+
+				"arrays must be homogeneous.", theType, t)
+		}
+	}
+	return tomlArray
+}

vendor/github.com/BurntSushi/toml/type_fields.go

@@ -0,0 +1,242 @@
+package toml
+
+// Struct field handling is adapted from code in encoding/json:
+//
+// Copyright 2010 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the Go distribution.
+
+import (
+	"reflect"
+	"sort"
+	"sync"
+)
+
+// A field represents a single field found in a struct.
+type field struct {
+	name  string       // the name of the field (`toml` tag included)
+	tag   bool         // whether field has a `toml` tag
+	index []int        // represents the depth of an anonymous field
+	typ   reflect.Type // the type of the field
+}
+
+// byName sorts field by name, breaking ties with depth,
+// then breaking ties with "name came from toml tag", then
+// breaking ties with index sequence.
+type byName []field
+
+func (x byName) Len() int { return len(x) }
+
+func (x byName) Swap(i, j int) { x[i], x[j] = x[j], x[i] }
+
+func (x byName) Less(i, j int) bool {
+	if x[i].name != x[j].name {
+		return x[i].name < x[j].name
+	}
+	if len(x[i].index) != len(x[j].index) {
+		return len(x[i].index) < len(x[j].index)
+	}
+	if x[i].tag != x[j].tag {
+		return x[i].tag
+	}
+	return byIndex(x).Less(i, j)
+}
+
+// byIndex sorts field by index sequence.
+type byIndex []field
+
+func (x byIndex) Len() int { return len(x) }
+
+func (x byIndex) Swap(i, j int) { x[i], x[j] = x[j], x[i] }
+
+func (x byIndex) Less(i, j int) bool {
+	for k, xik := range x[i].index {
+		if k >= len(x[j].index) {
+			return false
+		}
+		if xik != x[j].index[k] {
+			return xik < x[j].index[k]
+		}
+	}
+	return len(x[i].index) < len(x[j].index)
+}
+
+// typeFields returns a list of fields that TOML should recognize for the given
+// type. The algorithm is breadth-first search over the set of structs to
+// include - the top struct and then any reachable anonymous structs.
+func typeFields(t reflect.Type) []field {
+	// Anonymous fields to explore at the current level and the next.
+	current := []field{}
+	next := []field{{typ: t}}
+
+	// Count of queued names for current level and the next.
+	count := map[reflect.Type]int{}
+	nextCount := map[reflect.Type]int{}
+
+	// Types already visited at an earlier level.
+	visited := map[reflect.Type]bool{}
+
+	// Fields found.
+	var fields []field
+
+	for len(next) > 0 {
+		current, next = next, current[:0]
+		count, nextCount = nextCount, map[reflect.Type]int{}
+
+		for _, f := range current {
+			if visited[f.typ] {
+				continue
+			}
+			visited[f.typ] = true
+
+			// Scan f.typ for fields to include.
+			for i := 0; i < f.typ.NumField(); i++ {
+				sf := f.typ.Field(i)
+				if sf.PkgPath != "" && !sf.Anonymous { // unexported
+					continue
+				}
+				opts := getOptions(sf.Tag)
+				if opts.skip {
+					continue
+				}
+				index := make([]int, len(f.index)+1)
+				copy(index, f.index)
+				index[len(f.index)] = i
+
+				ft := sf.Type
+				if ft.Name() == "" && ft.Kind() == reflect.Ptr {
+					// Follow pointer.
+					ft = ft.Elem()
+				}
+
+				// Record found field and index sequence.
+				if opts.name != "" || !sf.Anonymous || ft.Kind() != reflect.Struct {
+					tagged := opts.name != ""
+					name := opts.name
+					if name == "" {
+						name = sf.Name
+					}
+					fields = append(fields, field{name, tagged, index, ft})
+					if count[f.typ] > 1 {
+						// If there were multiple instances, add a second,
+						// so that the annihilation code will see a duplicate.
+						// It only cares about the distinction between 1 or 2,
+						// so don't bother generating any more copies.
+						fields = append(fields, fields[len(fields)-1])
+					}
+					continue
+				}
+
+				// Record new anonymous struct to explore in next round.
+				nextCount[ft]++
+				if nextCount[ft] == 1 {
+					f := field{name: ft.Name(), index: index, typ: ft}
+					next = append(next, f)
+				}
+			}
+		}
+	}
+
+	sort.Sort(byName(fields))
+
+	// Delete all fields that are hidden by the Go rules for embedded fields,
+	// except that fields with TOML tags are promoted.
+
+	// The fields are sorted in primary order of name, secondary order
+	// of field index length. Loop over names; for each name, delete
+	// hidden fields by choosing the one dominant field that survives.
+	out := fields[:0]
+	for advance, i := 0, 0; i < len(fields); i += advance {
+		// One iteration per name.
+		// Find the sequence of fields with the name of this first field.
+		fi := fields[i]
+		name := fi.name
+		for advance = 1; i+advance < len(fields); advance++ {
+			fj := fields[i+advance]
+			if fj.name != name {
+				break
+			}
+		}
+		if advance == 1 { // Only one field with this name
+			out = append(out, fi)
+			continue
+		}
+		dominant, ok := dominantField(fields[i : i+advance])
+		if ok {
+			out = append(out, dominant)
+		}
+	}
+
+	fields = out
+	sort.Sort(byIndex(fields))
+
+	return fields
+}
+
+// dominantField looks through the fields, all of which are known to
+// have the same name, to find the single field that dominates the
+// others using Go's embedding rules, modified by the presence of
+// TOML tags. If there are multiple top-level fields, the boolean
+// will be false: This condition is an error in Go and we skip all
+// the fields.
+func dominantField(fields []field) (field, bool) {
+	// The fields are sorted in increasing index-length order. The winner
+	// must therefore be one with the shortest index length. Drop all
+	// longer entries, which is easy: just truncate the slice.
+	length := len(fields[0].index)
+	tagged := -1 // Index of first tagged field.
+	for i, f := range fields {
+		if len(f.index) > length {
+			fields = fields[:i]
+			break
+		}
+		if f.tag {
+			if tagged >= 0 {
+				// Multiple tagged fields at the same level: conflict.
+				// Return no field.
+				return field{}, false
+			}
+			tagged = i
+		}
+	}
+	if tagged >= 0 {
+		return fields[tagged], true
+	}
+	// All remaining fields have the same length. If there's more than one,
+	// we have a conflict (two fields named "X" at the same level) and we
+	// return no field.
+	if len(fields) > 1 {
+		return field{}, false
+	}
+	return fields[0], true
+}
+
+var fieldCache struct {
+	sync.RWMutex
+	m map[reflect.Type][]field
+}
+
+// cachedTypeFields is like typeFields but uses a cache to avoid repeated work.
+func cachedTypeFields(t reflect.Type) []field {
+	fieldCache.RLock()
+	f := fieldCache.m[t]
+	fieldCache.RUnlock()
+	if f != nil {
+		return f
+	}
+
+	// Compute fields without lock.
+	// Might duplicate effort but won't hold other computations back.
+	f = typeFields(t)
+	if f == nil {
+		f = []field{}
+	}
+
+	fieldCache.Lock()
+	if fieldCache.m == nil {
+		fieldCache.m = map[reflect.Type][]field{}
+	}
+	fieldCache.m[t] = f
+	fieldCache.Unlock()
+	return f
+}

vendor/github.com/davecgh/go-spew/LICENSE

@@ -0,0 +1,15 @@
+ISC License
+
+Copyright (c) 2012-2016 Dave Collins <dave@davec.name>
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

vendor/github.com/davecgh/go-spew/spew/bypass.go

@@ -0,0 +1,145 @@
+// Copyright (c) 2015-2016 Dave Collins <dave@davec.name>
+//
+// Permission to use, copy, modify, and distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+// NOTE: Due to the following build constraints, this file will only be compiled
+// when the code is not running on Google App Engine, compiled by GopherJS, and
+// "-tags safe" is not added to the go build command line.  The "disableunsafe"
+// tag is deprecated and thus should not be used.
+// Go versions prior to 1.4 are disabled because they use a different layout
+// for interfaces which make the implementation of unsafeReflectValue more complex.
+// +build !js,!appengine,!safe,!disableunsafe,go1.4
+
+package spew
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+const (
+	// UnsafeDisabled is a build-time constant which specifies whether or
+	// not access to the unsafe package is available.
+	UnsafeDisabled = false
+
+	// ptrSize is the size of a pointer on the current arch.
+	ptrSize = unsafe.Sizeof((*byte)(nil))
+)
+
+type flag uintptr
+
+var (
+	// flagRO indicates whether the value field of a reflect.Value
+	// is read-only.
+	flagRO flag
+
+	// flagAddr indicates whether the address of the reflect.Value's
+	// value may be taken.
+	flagAddr flag
+)
+
+// flagKindMask holds the bits that make up the kind
+// part of the flags field. In all the supported versions,
+// it is in the lower 5 bits.
+const flagKindMask = flag(0x1f)
+
+// Different versions of Go have used different
+// bit layouts for the flags type. This table
+// records the known combinations.
+var okFlags = []struct {
+	ro, addr flag
+}{{
+	// From Go 1.4 to 1.5
+	ro:   1 << 5,
+	addr: 1 << 7,
+}, {
+	// Up to Go tip.
+	ro:   1<<5 | 1<<6,
+	addr: 1 << 8,
+}}
+
+var flagValOffset = func() uintptr {
+	field, ok := reflect.TypeOf(reflect.Value{}).FieldByName("flag")
+	if !ok {
+		panic("reflect.Value has no flag field")
+	}
+	return field.Offset
+}()
+
+// flagField returns a pointer to the flag field of a reflect.Value.
+func flagField(v *reflect.Value) *flag {
+	return (*flag)(unsafe.Pointer(uintptr(unsafe.Pointer(v)) + flagValOffset))
+}
+
+// unsafeReflectValue converts the passed reflect.Value into a one that bypasses
+// the typical safety restrictions preventing access to unaddressable and
+// unexported data.  It works by digging the raw pointer to the underlying
+// value out of the protected value and generating a new unprotected (unsafe)
+// reflect.Value to it.
+//
+// This allows us to check for implementations of the Stringer and error
+// interfaces to be used for pretty printing ordinarily unaddressable and
+// inaccessible values such as unexported struct fields.
+func unsafeReflectValue(v reflect.Value) reflect.Value {
+	if !v.IsValid() || (v.CanInterface() && v.CanAddr()) {
+		return v
+	}
+	flagFieldPtr := flagField(&v)
+	*flagFieldPtr &^= flagRO
+	*flagFieldPtr |= flagAddr
+	return v
+}
+
+// Sanity checks against future reflect package changes
+// to the type or semantics of the Value.flag field.
+func init() {
+	field, ok := reflect.TypeOf(reflect.Value{}).FieldByName("flag")
+	if !ok {
+		panic("reflect.Value has no flag field")
+	}
+	if field.Type.Kind() != reflect.TypeOf(flag(0)).Kind() {
+		panic("reflect.Value flag field has changed kind")
+	}
+	type t0 int
+	var t struct {
+		A t0
+		// t0 will have flagEmbedRO set.
+		t0
+		// a will have flagStickyRO set
+		a t0
+	}
+	vA := reflect.ValueOf(t).FieldByName("A")
+	va := reflect.ValueOf(t).FieldByName("a")
+	vt0 := reflect.ValueOf(t).FieldByName("t0")
+
+	// Infer flagRO from the difference between the flags
+	// for the (otherwise identical) fields in t.
+	flagPublic := *flagField(&vA)
+	flagWithRO := *flagField(&va) | *flagField(&vt0)
+	flagRO = flagPublic ^ flagWithRO
+
+	// Infer flagAddr from the difference between a value
+	// taken from a pointer and not.
+	vPtrA := reflect.ValueOf(&t).Elem().FieldByName("A")
+	flagNoPtr := *flagField(&vA)
+	flagPtr := *flagField(&vPtrA)
+	flagAddr = flagNoPtr ^ flagPtr
+
+	// Check that the inferred flags tally with one of the known versions.
+	for _, f := range okFlags {
+		if flagRO == f.ro && flagAddr == f.addr {
+			return
+		}
+	}
+	panic("reflect.Value read-only flag has changed semantics")
+}

vendor/github.com/davecgh/go-spew/spew/bypasssafe.go

@@ -0,0 +1,38 @@
+// Copyright (c) 2015-2016 Dave Collins <dave@davec.name>
+//
+// Permission to use, copy, modify, and distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+// NOTE: Due to the following build constraints, this file will only be compiled
+// when the code is running on Google App Engine, compiled by GopherJS, or
+// "-tags safe" is added to the go build command line.  The "disableunsafe"
+// tag is deprecated and thus should not be used.
+// +build js appengine safe disableunsafe !go1.4
+
+package spew
+
+import "reflect"
+
+const (
+	// UnsafeDisabled is a build-time constant which specifies whether or
+	// not access to the unsafe package is available.
+	UnsafeDisabled = true
+)
+
+// unsafeReflectValue typically converts the passed reflect.Value into a one
+// that bypasses the typical safety restrictions preventing access to
+// unaddressable and unexported data.  However, doing this relies on access to
+// the unsafe package.  This is a stub version which simply returns the passed
+// reflect.Value when the unsafe package is not available.
+func unsafeReflectValue(v reflect.Value) reflect.Value {
+	return v
+}

vendor/github.com/davecgh/go-spew/spew/common.go

@@ -0,0 +1,341 @@
+/*
+ * Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+package spew
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"reflect"
+	"sort"
+	"strconv"
+)
+
+// Some constants in the form of bytes to avoid string overhead.  This mirrors
+// the technique used in the fmt package.
+var (
+	panicBytes            = []byte("(PANIC=")
+	plusBytes             = []byte("+")
+	iBytes                = []byte("i")
+	trueBytes             = []byte("true")
+	falseBytes            = []byte("false")
+	interfaceBytes        = []byte("(interface {})")
+	commaNewlineBytes     = []byte(",\n")
+	newlineBytes          = []byte("\n")
+	openBraceBytes        = []byte("{")
+	openBraceNewlineBytes = []byte("{\n")
+	closeBraceBytes       = []byte("}")
+	asteriskBytes         = []byte("*")
+	colonBytes            = []byte(":")
+	colonSpaceBytes       = []byte(": ")
+	openParenBytes        = []byte("(")
+	closeParenBytes       = []byte(")")
+	spaceBytes            = []byte(" ")
+	pointerChainBytes     = []byte("->")
+	nilAngleBytes         = []byte("<nil>")
+	maxNewlineBytes       = []byte("<max depth reached>\n")
+	maxShortBytes         = []byte("<max>")
+	circularBytes         = []byte("<already shown>")
+	circularShortBytes    = []byte("<shown>")
+	invalidAngleBytes     = []byte("<invalid>")
+	openBracketBytes      = []byte("[")
+	closeBracketBytes     = []byte("]")
+	percentBytes          = []byte("%")
+	precisionBytes        = []byte(".")
+	openAngleBytes        = []byte("<")
+	closeAngleBytes       = []byte(">")
+	openMapBytes          = []byte("map[")
+	closeMapBytes         = []byte("]")
+	lenEqualsBytes        = []byte("len=")
+	capEqualsBytes        = []byte("cap=")
+)
+
+// hexDigits is used to map a decimal value to a hex digit.
+var hexDigits = "0123456789abcdef"
+
+// catchPanic handles any panics that might occur during the handleMethods
+// calls.
+func catchPanic(w io.Writer, v reflect.Value) {
+	if err := recover(); err != nil {
+		w.Write(panicBytes)
+		fmt.Fprintf(w, "%v", err)
+		w.Write(closeParenBytes)
+	}
+}
+
+// handleMethods attempts to call the Error and String methods on the underlying
+// type the passed reflect.Value represents and outputes the result to Writer w.
+//
+// It handles panics in any called methods by catching and displaying the error
+// as the formatted value.
+func handleMethods(cs *ConfigState, w io.Writer, v reflect.Value) (handled bool) {
+	// We need an interface to check if the type implements the error or
+	// Stringer interface.  However, the reflect package won't give us an
+	// interface on certain things like unexported struct fields in order
+	// to enforce visibility rules.  We use unsafe, when it's available,
+	// to bypass these restrictions since this package does not mutate the
+	// values.
+	if !v.CanInterface() {
+		if UnsafeDisabled {
+			return false
+		}
+
+		v = unsafeReflectValue(v)
+	}
+
+	// Choose whether or not to do error and Stringer interface lookups against
+	// the base type or a pointer to the base type depending on settings.
+	// Technically calling one of these methods with a pointer receiver can
+	// mutate the value, however, types which choose to satisify an error or
+	// Stringer interface with a pointer receiver should not be mutating their
+	// state inside these interface methods.
+	if !cs.DisablePointerMethods && !UnsafeDisabled && !v.CanAddr() {
+		v = unsafeReflectValue(v)
+	}
+	if v.CanAddr() {
+		v = v.Addr()
+	}
+
+	// Is it an error or Stringer?
+	switch iface := v.Interface().(type) {
+	case error:
+		defer catchPanic(w, v)
+		if cs.ContinueOnMethod {
+			w.Write(openParenBytes)
+			w.Write([]byte(iface.Error()))
+			w.Write(closeParenBytes)
+			w.Write(spaceBytes)
+			return false
+		}
+
+		w.Write([]byte(iface.Error()))
+		return true
+
+	case fmt.Stringer:
+		defer catchPanic(w, v)
+		if cs.ContinueOnMethod {
+			w.Write(openParenBytes)
+			w.Write([]byte(iface.String()))
+			w.Write(closeParenBytes)
+			w.Write(spaceBytes)
+			return false
+		}
+		w.Write([]byte(iface.String()))
+		return true
+	}
+	return false
+}
+
+// printBool outputs a boolean value as true or false to Writer w.
+func printBool(w io.Writer, val bool) {
+	if val {
+		w.Write(trueBytes)
+	} else {
+		w.Write(falseBytes)
+	}
+}
+
+// printInt outputs a signed integer value to Writer w.
+func printInt(w io.Writer, val int64, base int) {
+	w.Write([]byte(strconv.FormatInt(val, base)))
+}
+
+// printUint outputs an unsigned integer value to Writer w.
+func printUint(w io.Writer, val uint64, base int) {
+	w.Write([]byte(strconv.FormatUint(val, base)))
+}
+
+// printFloat outputs a floating point value using the specified precision,
+// which is expected to be 32 or 64bit, to Writer w.
+func printFloat(w io.Writer, val float64, precision int) {
+	w.Write([]byte(strconv.FormatFloat(val, 'g', -1, precision)))
+}
+
+// printComplex outputs a complex value using the specified float precision
+// for the real and imaginary parts to Writer w.
+func printComplex(w io.Writer, c complex128, floatPrecision int) {
+	r := real(c)
+	w.Write(openParenBytes)
+	w.Write([]byte(strconv.FormatFloat(r, 'g', -1, floatPrecision)))
+	i := imag(c)
+	if i >= 0 {
+		w.Write(plusBytes)
+	}
+	w.Write([]byte(strconv.FormatFloat(i, 'g', -1, floatPrecision)))
+	w.Write(iBytes)
+	w.Write(closeParenBytes)
+}
+
+// printHexPtr outputs a uintptr formatted as hexadecimal with a leading '0x'
+// prefix to Writer w.
+func printHexPtr(w io.Writer, p uintptr) {
+	// Null pointer.
+	num := uint64(p)
+	if num == 0 {
+		w.Write(nilAngleBytes)
+		return
+	}
+
+	// Max uint64 is 16 bytes in hex + 2 bytes for '0x' prefix
+	buf := make([]byte, 18)
+
+	// It's simpler to construct the hex string right to left.
+	base := uint64(16)
+	i := len(buf) - 1
+	for num >= base {
+		buf[i] = hexDigits[num%base]
+		num /= base
+		i--
+	}
+	buf[i] = hexDigits[num]
+
+	// Add '0x' prefix.
+	i--
+	buf[i] = 'x'
+	i--
+	buf[i] = '0'
+
+	// Strip unused leading bytes.
+	buf = buf[i:]
+	w.Write(buf)
+}
+
+// valuesSorter implements sort.Interface to allow a slice of reflect.Value
+// elements to be sorted.
+type valuesSorter struct {
+	values  []reflect.Value
+	strings []string // either nil or same len and values
+	cs      *ConfigState
+}
+
+// newValuesSorter initializes a valuesSorter instance, which holds a set of
+// surrogate keys on which the data should be sorted.  It uses flags in
+// ConfigState to decide if and how to populate those surrogate keys.
+func newValuesSorter(values []reflect.Value, cs *ConfigState) sort.Interface {
+	vs := &valuesSorter{values: values, cs: cs}
+	if canSortSimply(vs.values[0].Kind()) {
+		return vs
+	}
+	if !cs.DisableMethods {
+		vs.strings = make([]string, len(values))
+		for i := range vs.values {
+			b := bytes.Buffer{}
+			if !handleMethods(cs, &b, vs.values[i]) {
+				vs.strings = nil
+				break
+			}
+			vs.strings[i] = b.String()
+		}
+	}
+	if vs.strings == nil && cs.SpewKeys {
+		vs.strings = make([]string, len(values))
+		for i := range vs.values {
+			vs.strings[i] = Sprintf("%#v", vs.values[i].Interface())
+		}
+	}
+	return vs
+}
+
+// canSortSimply tests whether a reflect.Kind is a primitive that can be sorted
+// directly, or whether it should be considered for sorting by surrogate keys
+// (if the ConfigState allows it).
+func canSortSimply(kind reflect.Kind) bool {
+	// This switch parallels valueSortLess, except for the default case.
+	switch kind {
+	case reflect.Bool:
+		return true
+	case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int:
+		return true
+	case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint:
+		return true
+	case reflect.Float32, reflect.Float64:
+		return true
+	case reflect.String:
+		return true
+	case reflect.Uintptr:
+		return true
+	case reflect.Array:
+		return true
+	}
+	return false
+}
+
+// Len returns the number of values in the slice.  It is part of the
+// sort.Interface implementation.
+func (s *valuesSorter) Len() int {
+	return len(s.values)
+}
+
+// Swap swaps the values at the passed indices.  It is part of the
+// sort.Interface implementation.
+func (s *valuesSorter) Swap(i, j int) {
+	s.values[i], s.values[j] = s.values[j], s.values[i]
+	if s.strings != nil {
+		s.strings[i], s.strings[j] = s.strings[j], s.strings[i]
+	}
+}
+
+// valueSortLess returns whether the first value should sort before the second
+// value.  It is used by valueSorter.Less as part of the sort.Interface
+// implementation.
+func valueSortLess(a, b reflect.Value) bool {
+	switch a.Kind() {
+	case reflect.Bool:
+		return !a.Bool() && b.Bool()
+	case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int:
+		return a.Int() < b.Int()
+	case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint:
+		return a.Uint() < b.Uint()
+	case reflect.Float32, reflect.Float64:
+		return a.Float() < b.Float()
+	case reflect.String:
+		return a.String() < b.String()
+	case reflect.Uintptr:
+		return a.Uint() < b.Uint()
+	case reflect.Array:
+		// Compare the contents of both arrays.
+		l := a.Len()
+		for i := 0; i < l; i++ {
+			av := a.Index(i)
+			bv := b.Index(i)
+			if av.Interface() == bv.Interface() {
+				continue
+			}
+			return valueSortLess(av, bv)
+		}
+	}
+	return a.String() < b.String()
+}
+
+// Less returns whether the value at index i should sort before the
+// value at index j.  It is part of the sort.Interface implementation.
+func (s *valuesSorter) Less(i, j int) bool {
+	if s.strings == nil {
+		return valueSortLess(s.values[i], s.values[j])
+	}
+	return s.strings[i] < s.strings[j]
+}
+
+// sortValues is a sort function that handles both native types and any type that
+// can be converted to error or Stringer.  Other inputs are sorted according to
+// their Value.String() value to ensure display stability.
+func sortValues(values []reflect.Value, cs *ConfigState) {
+	if len(values) == 0 {
+		return
+	}
+	sort.Sort(newValuesSorter(values, cs))
+}

vendor/github.com/davecgh/go-spew/spew/config.go

@@ -0,0 +1,306 @@
+/*
+ * Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+package spew
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+)
+
+// ConfigState houses the configuration options used by spew to format and
+// display values.  There is a global instance, Config, that is used to control
+// all top-level Formatter and Dump functionality.  Each ConfigState instance
+// provides methods equivalent to the top-level functions.
+//
+// The zero value for ConfigState provides no indentation.  You would typically
+// want to set it to a space or a tab.
+//
+// Alternatively, you can use NewDefaultConfig to get a ConfigState instance
+// with default settings.  See the documentation of NewDefaultConfig for default
+// values.
+type ConfigState struct {
+	// Indent specifies the string to use for each indentation level.  The
+	// global config instance that all top-level functions use set this to a
+	// single space by default.  If you would like more indentation, you might
+	// set this to a tab with "\t" or perhaps two spaces with "  ".
+	Indent string
+
+	// MaxDepth controls the maximum number of levels to descend into nested
+	// data structures.  The default, 0, means there is no limit.
+	//
+	// NOTE: Circular data structures are properly detected, so it is not
+	// necessary to set this value unless you specifically want to limit deeply
+	// nested data structures.
+	MaxDepth int
+
+	// DisableMethods specifies whether or not error and Stringer interfaces are
+	// invoked for types that implement them.
+	DisableMethods bool
+
+	// DisablePointerMethods specifies whether or not to check for and invoke
+	// error and Stringer interfaces on types which only accept a pointer
+	// receiver when the current type is not a pointer.
+	//
+	// NOTE: This might be an unsafe action since calling one of these methods
+	// with a pointer receiver could technically mutate the value, however,
+	// in practice, types which choose to satisify an error or Stringer
+	// interface with a pointer receiver should not be mutating their state
+	// inside these interface methods.  As a result, this option relies on
+	// access to the unsafe package, so it will not have any effect when
+	// running in environments without access to the unsafe package such as
+	// Google App Engine or with the "safe" build tag specified.
+	DisablePointerMethods bool
+
+	// DisablePointerAddresses specifies whether to disable the printing of
+	// pointer addresses. This is useful when diffing data structures in tests.
+	DisablePointerAddresses bool
+
+	// DisableCapacities specifies whether to disable the printing of capacities
+	// for arrays, slices, maps and channels. This is useful when diffing
+	// data structures in tests.
+	DisableCapacities bool
+
+	// ContinueOnMethod specifies whether or not recursion should continue once
+	// a custom error or Stringer interface is invoked.  The default, false,
+	// means it will print the results of invoking the custom error or Stringer
+	// interface and return immediately instead of continuing to recurse into
+	// the internals of the data type.
+	//
+	// NOTE: This flag does not have any effect if method invocation is disabled
+	// via the DisableMethods or DisablePointerMethods options.
+	ContinueOnMethod bool
+
+	// SortKeys specifies map keys should be sorted before being printed. Use
+	// this to have a more deterministic, diffable output.  Note that only
+	// native types (bool, int, uint, floats, uintptr and string) and types
+	// that support the error or Stringer interfaces (if methods are
+	// enabled) are supported, with other types sorted according to the
+	// reflect.Value.String() output which guarantees display stability.
+	SortKeys bool
+
+	// SpewKeys specifies that, as a last resort attempt, map keys should
+	// be spewed to strings and sorted by those strings.  This is only
+	// considered if SortKeys is true.
+	SpewKeys bool
+}
+
+// Config is the active configuration of the top-level functions.
+// The configuration can be changed by modifying the contents of spew.Config.
+var Config = ConfigState{Indent: " "}
+
+// Errorf is a wrapper for fmt.Errorf that treats each argument as if it were
+// passed with a Formatter interface returned by c.NewFormatter.  It returns
+// the formatted string as a value that satisfies error.  See NewFormatter
+// for formatting details.
+//
+// This function is shorthand for the following syntax:
+//
+//	fmt.Errorf(format, c.NewFormatter(a), c.NewFormatter(b))
+func (c *ConfigState) Errorf(format string, a ...interface{}) (err error) {
+	return fmt.Errorf(format, c.convertArgs(a)...)
+}
+
+// Fprint is a wrapper for fmt.Fprint that treats each argument as if it were
+// passed with a Formatter interface returned by c.NewFormatter.  It returns
+// the number of bytes written and any write error encountered.  See
+// NewFormatter for formatting details.
+//
+// This function is shorthand for the following syntax:
+//
+//	fmt.Fprint(w, c.NewFormatter(a), c.NewFormatter(b))
+func (c *ConfigState) Fprint(w io.Writer, a ...interface{}) (n int, err error) {
+	return fmt.Fprint(w, c.convertArgs(a)...)
+}
+
+// Fprintf is a wrapper for fmt.Fprintf that treats each argument as if it were
+// passed with a Formatter interface returned by c.NewFormatter.  It returns
+// the number of bytes written and any write error encountered.  See
+// NewFormatter for formatting details.
+//
+// This function is shorthand for the following syntax:
+//
+//	fmt.Fprintf(w, format, c.NewFormatter(a), c.NewFormatter(b))
+func (c *ConfigState) Fprintf(w io.Writer, format string, a ...interface{}) (n int, err error) {
+	return fmt.Fprintf(w, format, c.convertArgs(a)...)
+}
+
+// Fprintln is a wrapper for fmt.Fprintln that treats each argument as if it
+// passed with a Formatter interface returned by c.NewFormatter.  See
+// NewFormatter for formatting details.
+//
+// This function is shorthand for the following syntax:
+//
+//	fmt.Fprintln(w, c.NewFormatter(a), c.NewFormatter(b))
+func (c *ConfigState) Fprintln(w io.Writer, a ...interface{}) (n int, err error) {
+	return fmt.Fprintln(w, c.convertArgs(a)...)
+}
+
+// Print is a wrapper for fmt.Print that treats each argument as if it were
+// passed with a Formatter interface returned by c.NewFormatter.  It returns
+// the number of bytes written and any write error encountered.  See
+// NewFormatter for formatting details.
+//
+// This function is shorthand for the following syntax:
+//
+//	fmt.Print(c.NewFormatter(a), c.NewFormatter(b))
+func (c *ConfigState) Print(a ...interface{}) (n int, err error) {
+	return fmt.Print(c.convertArgs(a)...)
+}
+
+// Printf is a wrapper for fmt.Printf that treats each argument as if it were
+// passed with a Formatter interface returned by c.NewFormatter.  It returns
+// the number of bytes written and any write error encountered.  See
+// NewFormatter for formatting details.
+//
+// This function is shorthand for the following syntax:
+//
+//	fmt.Printf(format, c.NewFormatter(a), c.NewFormatter(b))
+func (c *ConfigState) Printf(format string, a ...interface{}) (n int, err error) {
+	return fmt.Printf(format, c.convertArgs(a)...)
+}
+
+// Println is a wrapper for fmt.Println that treats each argument as if it were
+// passed with a Formatter interface returned by c.NewFormatter.  It returns
+// the number of bytes written and any write error encountered.  See
+// NewFormatter for formatting details.
+//
+// This function is shorthand for the following syntax:
+//
+//	fmt.Println(c.NewFormatter(a), c.NewFormatter(b))
+func (c *ConfigState) Println(a ...interface{}) (n int, err error) {
+	return fmt.Println(c.convertArgs(a)...)
+}
+
+// Sprint is a wrapper for fmt.Sprint that treats each argument as if it were
+// passed with a Formatter interface returned by c.NewFormatter.  It returns
+// the resulting string.  See NewFormatter for formatting details.
+//
+// This function is shorthand for the following syntax:
+//
+//	fmt.Sprint(c.NewFormatter(a), c.NewFormatter(b))
+func (c *ConfigState) Sprint(a ...interface{}) string {
+	return fmt.Sprint(c.convertArgs(a)...)
+}
+
+// Sprintf is a wrapper for fmt.Sprintf that treats each argument as if it were
+// passed with a Formatter interface returned by c.NewFormatter.  It returns
+// the resulting string.  See NewFormatter for formatting details.
+//
+// This function is shorthand for the following syntax:
+//
+//	fmt.Sprintf(format, c.NewFormatter(a), c.NewFormatter(b))
+func (c *ConfigState) Sprintf(format string, a ...interface{}) string {
+	return fmt.Sprintf(format, c.convertArgs(a)...)
+}
+
+// Sprintln is a wrapper for fmt.Sprintln that treats each argument as if it
+// were passed with a Formatter interface returned by c.NewFormatter.  It
+// returns the resulting string.  See NewFormatter for formatting details.
+//
+// This function is shorthand for the following syntax:
+//
+//	fmt.Sprintln(c.NewFormatter(a), c.NewFormatter(b))
+func (c *ConfigState) Sprintln(a ...interface{}) string {
+	return fmt.Sprintln(c.convertArgs(a)...)
+}
+
+/*
+NewFormatter returns a custom formatter that satisfies the fmt.Formatter
+interface.  As a result, it integrates cleanly with standard fmt package
+printing functions.  The formatter is useful for inline printing of smaller data
+types similar to the standard %v format specifier.
+
+The custom formatter only responds to the %v (most compact), %+v (adds pointer
+addresses), %#v (adds types), and %#+v (adds types and pointer addresses) verb
+combinations.  Any other verbs such as %x and %q will be sent to the the
+standard fmt package for formatting.  In addition, the custom formatter ignores
+the width and precision arguments (however they will still work on the format
+specifiers not handled by the custom formatter).
+
+Typically this function shouldn't be called directly.  It is much easier to make
+use of the custom formatter by calling one of the convenience functions such as
+c.Printf, c.Println, or c.Printf.
+*/
+func (c *ConfigState) NewFormatter(v interface{}) fmt.Formatter {
+	return newFormatter(c, v)
+}
+
+// Fdump formats and displays the passed arguments to io.Writer w.  It formats
+// exactly the same as Dump.
+func (c *ConfigState) Fdump(w io.Writer, a ...interface{}) {
+	fdump(c, w, a...)
+}
+
+/*
+Dump displays the passed parameters to standard out with newlines, customizable
+indentation, and additional debug information such as complete types and all
+pointer addresses used to indirect to the final value.  It provides the
+following features over the built-in printing facilities provided by the fmt
+package:
+
+	* Pointers are dereferenced and followed
+	* Circular data structures are detected and handled properly
+	* Custom Stringer/error interfaces are optionally invoked, including
+	  on unexported types
+	* Custom types which only implement the Stringer/error interfaces via
+	  a pointer receiver are optionally invoked when passing non-pointer
+	  variables
+	* Byte arrays and slices are dumped like the hexdump -C command which
+	  includes offsets, byte values in hex, and ASCII output
+
+The configuration options are controlled by modifying the public members
+of c.  See ConfigState for options documentation.
+
+See Fdump if you would prefer dumping to an arbitrary io.Writer or Sdump to
+get the formatted result as a string.
+*/
+func (c *ConfigState) Dump(a ...interface{}) {
+	fdump(c, os.Stdout, a...)
+}
+
+// Sdump returns a string with the passed arguments formatted exactly the same
+// as Dump.
+func (c *ConfigState) Sdump(a ...interface{}) string {
+	var buf bytes.Buffer
+	fdump(c, &buf, a...)
+	return buf.String()
+}
+
+// convertArgs accepts a slice of arguments and returns a slice of the same
+// length with each argument converted to a spew Formatter interface using
+// the ConfigState associated with s.
+func (c *ConfigState) convertArgs(args []interface{}) (formatters []interface{}) {
+	formatters = make([]interface{}, len(args))
+	for index, arg := range args {
+		formatters[index] = newFormatter(c, arg)
+	}
+	return formatters
+}
+
+// NewDefaultConfig returns a ConfigState with the following default settings.
+//
+// 	Indent: " "
+// 	MaxDepth: 0
+// 	DisableMethods: false
+// 	DisablePointerMethods: false
+// 	ContinueOnMethod: false
+// 	SortKeys: false
+func NewDefaultConfig() *ConfigState {
+	return &ConfigState{Indent: " "}
+}

vendor/github.com/davecgh/go-spew/spew/doc.go

@@ -0,0 +1,211 @@
+/*
+ * Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+Package spew implements a deep pretty printer for Go data structures to aid in
+debugging.
+
+A quick overview of the additional features spew provides over the built-in
+printing facilities for Go data types are as follows:
+
+	* Pointers are dereferenced and followed
+	* Circular data structures are detected and handled properly
+	* Custom Stringer/error interfaces are optionally invoked, including
+	  on unexported types
+	* Custom types which only implement the Stringer/error interfaces via
+	  a pointer receiver are optionally invoked when passing non-pointer
+	  variables
+	* Byte arrays and slices are dumped like the hexdump -C command which
+	  includes offsets, byte values in hex, and ASCII output (only when using
+	  Dump style)
+
+There are two different approaches spew allows for dumping Go data structures:
+
+	* Dump style which prints with newlines, customizable indentation,
+	  and additional debug information such as types and all pointer addresses
+	  used to indirect to the final value
+	* A custom Formatter interface that integrates cleanly with the standard fmt
+	  package and replaces %v, %+v, %#v, and %#+v to provide inline printing
+	  similar to the default %v while providing the additional functionality
+	  outlined above and passing unsupported format verbs such as %x and %q
+	  along to fmt
+
+Quick Start
+
+This section demonstrates how to quickly get started with spew.  See the
+sections below for further details on formatting and configuration options.
+
+To dump a variable with full newlines, indentation, type, and pointer
+information use Dump, Fdump, or Sdump:
+	spew.Dump(myVar1, myVar2, ...)
+	spew.Fdump(someWriter, myVar1, myVar2, ...)
+	str := spew.Sdump(myVar1, myVar2, ...)
+
+Alternatively, if you would prefer to use format strings with a compacted inline
+printing style, use the convenience wrappers Printf, Fprintf, etc with
+%v (most compact), %+v (adds pointer addresses), %#v (adds types), or
+%#+v (adds types and pointer addresses):
+	spew.Printf("myVar1: %v -- myVar2: %+v", myVar1, myVar2)
+	spew.Printf("myVar3: %#v -- myVar4: %#+v", myVar3, myVar4)
+	spew.Fprintf(someWriter, "myVar1: %v -- myVar2: %+v", myVar1, myVar2)
+	spew.Fprintf(someWriter, "myVar3: %#v -- myVar4: %#+v", myVar3, myVar4)
+
+Configuration Options
+
+Configuration of spew is handled by fields in the ConfigState type.  For
+convenience, all of the top-level functions use a global state available
+via the spew.Config global.
+
+It is also possible to create a ConfigState instance that provides methods
+equivalent to the top-level functions.  This allows concurrent configuration
+options.  See the ConfigState documentation for more details.
+
+The following configuration options are available:
+	* Indent
+		String to use for each indentation level for Dump functions.
+		It is a single space by default.  A popular alternative is "\t".
+
+	* MaxDepth
+		Maximum number of levels to descend into nested data structures.
+		There is no limit by default.
+
+	* DisableMethods
+		Disables invocation of error and Stringer interface methods.
+		Method invocation is enabled by default.
+
+	* DisablePointerMethods
+		Disables invocation of error and Stringer interface methods on types
+		which only accept pointer receivers from non-pointer variables.
+		Pointer method invocation is enabled by default.
+
+	* DisablePointerAddresses
+		DisablePointerAddresses specifies whether to disable the printing of
+		pointer addresses. This is useful when diffing data structures in tests.
+
+	* DisableCapacities
+		DisableCapacities specifies whether to disable the printing of
+		capacities for arrays, slices, maps and channels. This is useful when
+		diffing data structures in tests.
+
+	* ContinueOnMethod
+		Enables recursion into types after invoking error and Stringer interface
+		methods. Recursion after method invocation is disabled by default.
+
+	* SortKeys
+		Specifies map keys should be sorted before being printed. Use
+		this to have a more deterministic, diffable output.  Note that
+		only native types (bool, int, uint, floats, uintptr and string)
+		and types which implement error or Stringer interfaces are
+		supported with other types sorted according to the
+		reflect.Value.String() output which guarantees display
+		stability.  Natural map order is used by default.
+
+	* SpewKeys
+		Specifies that, as a last resort attempt, map keys should be
+		spewed to strings and sorted by those strings.  This is only
+		considered if SortKeys is true.
+
+Dump Usage
+
+Simply call spew.Dump with a list of variables you want to dump:
+
+	spew.Dump(myVar1, myVar2, ...)
+
+You may also call spew.Fdump if you would prefer to output to an arbitrary
+io.Writer.  For example, to dump to standard error:
+
+	spew.Fdump(os.Stderr, myVar1, myVar2, ...)
+
+A third option is to call spew.Sdump to get the formatted output as a string:
+
+	str := spew.Sdump(myVar1, myVar2, ...)
+
+Sample Dump Output
+
+See the Dump example for details on the setup of the types and variables being
+shown here.
+
+	(main.Foo) {
+	 unexportedField: (*main.Bar)(0xf84002e210)({
+	  flag: (main.Flag) flagTwo,
+	  data: (uintptr) <nil>
+	 }),
+	 ExportedField: (map[interface {}]interface {}) (len=1) {
+	  (string) (len=3) "one": (bool) true
+	 }
+	}
+
+Byte (and uint8) arrays and slices are displayed uniquely like the hexdump -C
+command as shown.
+	([]uint8) (len=32 cap=32) {
+	 00000000  11 12 13 14 15 16 17 18  19 1a 1b 1c 1d 1e 1f 20  |............... |
+	 00000010  21 22 23 24 25 26 27 28  29 2a 2b 2c 2d 2e 2f 30  |!"#$%&'()*+,-./0|
+	 00000020  31 32                                             |12|
+	}
+
+Custom Formatter
+
+Spew provides a custom formatter that implements the fmt.Formatter interface
+so that it integrates cleanly with standard fmt package printing functions. The
+formatter is useful for inline printing of smaller data types similar to the
+standard %v format specifier.
+
+The custom formatter only responds to the %v (most compact), %+v (adds pointer
+addresses), %#v (adds types), or %#+v (adds types and pointer addresses) verb
+combinations.  Any other verbs such as %x and %q will be sent to the the
+standard fmt package for formatting.  In addition, the custom formatter ignores
+the width and precision arguments (however they will still work on the format
+specifiers not handled by the custom formatter).
+
+Custom Formatter Usage
+
+The simplest way to make use of the spew custom formatter is to call one of the
+convenience functions such as spew.Printf, spew.Println, or spew.Printf.  The
+functions have syntax you are most likely already familiar with:
+
+	spew.Printf("myVar1: %v -- myVar2: %+v", myVar1, myVar2)
+	spew.Printf("myVar3: %#v -- myVar4: %#+v", myVar3, myVar4)
+	spew.Println(myVar, myVar2)
+	spew.Fprintf(os.Stderr, "myVar1: %v -- myVar2: %+v", myVar1, myVar2)
+	spew.Fprintf(os.Stderr, "myVar3: %#v -- myVar4: %#+v", myVar3, myVar4)
+
+See the Index for the full list convenience functions.
+
+Sample Formatter Output
+
+Double pointer to a uint8:
+	  %v: <**>5
+	 %+v: <**>(0xf8400420d0->0xf8400420c8)5
+	 %#v: (**uint8)5
+	%#+v: (**uint8)(0xf8400420d0->0xf8400420c8)5
+
+Pointer to circular struct with a uint8 field and a pointer to itself:
+	  %v: <*>{1 <*><shown>}
+	 %+v: <*>(0xf84003e260){ui8:1 c:<*>(0xf84003e260)<shown>}
+	 %#v: (*main.circular){ui8:(uint8)1 c:(*main.circular)<shown>}
+	%#+v: (*main.circular)(0xf84003e260){ui8:(uint8)1 c:(*main.circular)(0xf84003e260)<shown>}
+
+See the Printf example for details on the setup of variables being shown
+here.
+
+Errors
+
+Since it is possible for custom Stringer/error interfaces to panic, spew
+detects them and handles them internally by printing the panic information
+inline with the output.  Since spew is intended to provide deep pretty printing
+capabilities on structures, it intentionally does not return any errors.
+*/
+package spew

vendor/github.com/davecgh/go-spew/spew/dump.go

@@ -0,0 +1,509 @@
+/*
+ * Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+package spew
+
+import (
+	"bytes"
+	"encoding/hex"
+	"fmt"
+	"io"
+	"os"
+	"reflect"
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+var (
+	// uint8Type is a reflect.Type representing a uint8.  It is used to
+	// convert cgo types to uint8 slices for hexdumping.
+	uint8Type = reflect.TypeOf(uint8(0))
+
+	// cCharRE is a regular expression that matches a cgo char.
+	// It is used to detect character arrays to hexdump them.
+	cCharRE = regexp.MustCompile(`^.*\._Ctype_char$`)
+
+	// cUnsignedCharRE is a regular expression that matches a cgo unsigned
+	// char.  It is used to detect unsigned character arrays to hexdump
+	// them.
+	cUnsignedCharRE = regexp.MustCompile(`^.*\._Ctype_unsignedchar$`)
+
+	// cUint8tCharRE is a regular expression that matches a cgo uint8_t.
+	// It is used to detect uint8_t arrays to hexdump them.
+	cUint8tCharRE = regexp.MustCompile(`^.*\._Ctype_uint8_t$`)
+)
+
+// dumpState contains information about the state of a dump operation.
+type dumpState struct {
+	w                io.Writer
+	depth            int
+	pointers         map[uintptr]int
+	ignoreNextType   bool
+	ignoreNextIndent bool
+	cs               *ConfigState
+}
+
+// indent performs indentation according to the depth level and cs.Indent
+// option.
+func (d *dumpState) indent() {
+	if d.ignoreNextIndent {
+		d.ignoreNextIndent = false
+		return
+	}
+	d.w.Write(bytes.Repeat([]byte(d.cs.Indent), d.depth))
+}
+
+// unpackValue returns values inside of non-nil interfaces when possible.
+// This is useful for data types like structs, arrays, slices, and maps which
+// can contain varying types packed inside an interface.
+func (d *dumpState) unpackValue(v reflect.Value) reflect.Value {
+	if v.Kind() == reflect.Interface && !v.IsNil() {
+		v = v.Elem()
+	}
+	return v
+}
+
+// dumpPtr handles formatting of pointers by indirecting them as necessary.
+func (d *dumpState) dumpPtr(v reflect.Value) {
+	// Remove pointers at or below the current depth from map used to detect
+	// circular refs.
+	for k, depth := range d.pointers {
+		if depth >= d.depth {
+			delete(d.pointers, k)
+		}
+	}
+
+	// Keep list of all dereferenced pointers to show later.
+	pointerChain := make([]uintptr, 0)
+
+	// Figure out how many levels of indirection there are by dereferencing
+	// pointers and unpacking interfaces down the chain while detecting circular
+	// references.
+	nilFound := false
+	cycleFound := false
+	indirects := 0
+	ve := v
+	for ve.Kind() == reflect.Ptr {
+		if ve.IsNil() {
+			nilFound = true
+			break
+		}
+		indirects++
+		addr := ve.Pointer()
+		pointerChain = append(pointerChain, addr)
+		if pd, ok := d.pointers[addr]; ok && pd < d.depth {
+			cycleFound = true
+			indirects--
+			break
+		}
+		d.pointers[addr] = d.depth
+
+		ve = ve.Elem()
+		if ve.Kind() == reflect.Interface {
+			if ve.IsNil() {
+				nilFound = true
+				break
+			}
+			ve = ve.Elem()
+		}
+	}
+
+	// Display type information.
+	d.w.Write(openParenBytes)
+	d.w.Write(bytes.Repeat(asteriskBytes, indirects))
+	d.w.Write([]byte(ve.Type().String()))
+	d.w.Write(closeParenBytes)
+
+	// Display pointer information.
+	if !d.cs.DisablePointerAddresses && len(pointerChain) > 0 {
+		d.w.Write(openParenBytes)
+		for i, addr := range pointerChain {
+			if i > 0 {
+				d.w.Write(pointerChainBytes)
+			}
+			printHexPtr(d.w, addr)
+		}
+		d.w.Write(closeParenBytes)
+	}
+
+	// Display dereferenced value.
+	d.w.Write(openParenBytes)
+	switch {
+	case nilFound:
+		d.w.Write(nilAngleBytes)
+
+	case cycleFound:
+		d.w.Write(circularBytes)
+
+	default:
+		d.ignoreNextType = true
+		d.dump(ve)
+	}
+	d.w.Write(closeParenBytes)
+}
+
+// dumpSlice handles formatting of arrays and slices.  Byte (uint8 under
+// reflection) arrays and slices are dumped in hexdump -C fashion.
+func (d *dumpState) dumpSlice(v reflect.Value) {
+	// Determine whether this type should be hex dumped or not.  Also,
+	// for types which should be hexdumped, try to use the underlying data
+	// first, then fall back to trying to convert them to a uint8 slice.
+	var buf []uint8
+	doConvert := false
+	doHexDump := false
+	numEntries := v.Len()
+	if numEntries > 0 {
+		vt := v.Index(0).Type()
+		vts := vt.String()
+		switch {
+		// C types that need to be converted.
+		case cCharRE.MatchString(vts):
+			fallthrough
+		case cUnsignedCharRE.MatchString(vts):
+			fallthrough
+		case cUint8tCharRE.MatchString(vts):
+			doConvert = true
+
+		// Try to use existing uint8 slices and fall back to converting
+		// and copying if that fails.
+		case vt.Kind() == reflect.Uint8:
+			// We need an addressable interface to convert the type
+			// to a byte slice.  However, the reflect package won't
+			// give us an interface on certain things like
+			// unexported struct fields in order to enforce
+			// visibility rules.  We use unsafe, when available, to
+			// bypass these restrictions since this package does not
+			// mutate the values.
+			vs := v
+			if !vs.CanInterface() || !vs.CanAddr() {
+				vs = unsafeReflectValue(vs)
+			}
+			if !UnsafeDisabled {
+				vs = vs.Slice(0, numEntries)
+
+				// Use the existing uint8 slice if it can be
+				// type asserted.
+				iface := vs.Interface()
+				if slice, ok := iface.([]uint8); ok {
+					buf = slice
+					doHexDump = true
+					break
+				}
+			}
+
+			// The underlying data needs to be converted if it can't
+			// be type asserted to a uint8 slice.
+			doConvert = true
+		}
+
+		// Copy and convert the underlying type if needed.
+		if doConvert && vt.ConvertibleTo(uint8Type) {
+			// Convert and copy each element into a uint8 byte
+			// slice.
+			buf = make([]uint8, numEntries)
+			for i := 0; i < numEntries; i++ {
+				vv := v.Index(i)
+				buf[i] = uint8(vv.Convert(uint8Type).Uint())
+			}
+			doHexDump = true
+		}
+	}
+
+	// Hexdump the entire slice as needed.
+	if doHexDump {
+		indent := strings.Repeat(d.cs.Indent, d.depth)
+		str := indent + hex.Dump(buf)
+		str = strings.Replace(str, "\n", "\n"+indent, -1)
+		str = strings.TrimRight(str, d.cs.Indent)
+		d.w.Write([]byte(str))
+		return
+	}
+
+	// Recursively call dump for each item.
+	for i := 0; i < numEntries; i++ {
+		d.dump(d.unpackValue(v.Index(i)))
+		if i < (numEntries - 1) {
+			d.w.Write(commaNewlineBytes)
+		} else {
+			d.w.Write(newlineBytes)
+		}
+	}
+}
+
+// dump is the main workhorse for dumping a value.  It uses the passed reflect
+// value to figure out what kind of object we are dealing with and formats it
+// appropriately.  It is a recursive function, however circular data structures
+// are detected and handled properly.
+func (d *dumpState) dump(v reflect.Value) {
+	// Handle invalid reflect values immediately.
+	kind := v.Kind()
+	if kind == reflect.Invalid {
+		d.w.Write(invalidAngleBytes)
+		return
+	}
+
+	// Handle pointers specially.
+	if kind == reflect.Ptr {
+		d.indent()
+		d.dumpPtr(v)
+		return
+	}
+
+	// Print type information unless already handled elsewhere.
+	if !d.ignoreNextType {
+		d.indent()
+		d.w.Write(openParenBytes)
+		d.w.Write([]byte(v.Type().String()))
+		d.w.Write(closeParenBytes)
+		d.w.Write(spaceBytes)
+	}
+	d.ignoreNextType = false
+
+	// Display length and capacity if the built-in len and cap functions
+	// work with the value's kind and the len/cap itself is non-zero.
+	valueLen, valueCap := 0, 0
+	switch v.Kind() {
+	case reflect.Array, reflect.Slice, reflect.Chan:
+		valueLen, valueCap = v.Len(), v.Cap()
+	case reflect.Map, reflect.String:
+		valueLen = v.Len()
+	}
+	if valueLen != 0 || !d.cs.DisableCapacities && valueCap != 0 {
+		d.w.Write(openParenBytes)
+		if valueLen != 0 {
+			d.w.Write(lenEqualsBytes)
+			printInt(d.w, int64(valueLen), 10)
+		}
+		if !d.cs.DisableCapacities && valueCap != 0 {
+			if valueLen != 0 {
+				d.w.Write(spaceBytes)
+			}
+			d.w.Write(capEqualsBytes)
+			printInt(d.w, int64(valueCap), 10)
+		}
+		d.w.Write(closeParenBytes)
+		d.w.Write(spaceBytes)
+	}
+
+	// Call Stringer/error interfaces if they exist and the handle methods flag
+	// is enabled
+	if !d.cs.DisableMethods {
+		if (kind != reflect.Invalid) && (kind != reflect.Interface) {
+			if handled := handleMethods(d.cs, d.w, v); handled {
+				return
+			}
+		}
+	}
+
+	switch kind {
+	case reflect.Invalid:
+		// Do nothing.  We should never get here since invalid has already
+		// been handled above.
+
+	case reflect.Bool:
+		printBool(d.w, v.Bool())
+
+	case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int:
+		printInt(d.w, v.Int(), 10)
+
+	case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint:
+		printUint(d.w, v.Uint(), 10)
+
+	case reflect.Float32:
+		printFloat(d.w, v.Float(), 32)
+
+	case reflect.Float64:
+		printFloat(d.w, v.Float(), 64)
+
+	case reflect.Complex64:
+		printComplex(d.w, v.Complex(), 32)
+
+	case reflect.Complex128:
+		printComplex(d.w, v.Complex(), 64)
+
+	case reflect.Slice:
+		if v.IsNil() {
+			d.w.Write(nilAngleBytes)
+			break
+		}
+		fallthrough
+
+	case reflect.Array:
+		d.w.Write(openBraceNewlineBytes)
+		d.depth++
+		if (d.cs.MaxDepth != 0) && (d.depth > d.cs.MaxDepth) {
+			d.indent()
+			d.w.Write(maxNewlineBytes)
+		} else {
+			d.dumpSlice(v)
+		}
+		d.depth--
+		d.indent()
+		d.w.Write(closeBraceBytes)
+
+	case reflect.String:
+		d.w.Write([]byte(strconv.Quote(v.String())))
+
+	case reflect.Interface:
+		// The only time we should get here is for nil interfaces due to
+		// unpackValue calls.
+		if v.IsNil() {
+			d.w.Write(nilAngleBytes)
+		}
+
+	case reflect.Ptr:
+		// Do nothing.  We should never get here since pointers have already
+		// been handled above.
+
+	case reflect.Map:
+		// nil maps should be indicated as different than empty maps
+		if v.IsNil() {
+			d.w.Write(nilAngleBytes)
+			break
+		}
+
+		d.w.Write(openBraceNewlineBytes)
+		d.depth++
+		if (d.cs.MaxDepth != 0) && (d.depth > d.cs.MaxDepth) {
+			d.indent()
+			d.w.Write(maxNewlineBytes)
+		} else {
+			numEntries := v.Len()
+			keys := v.MapKeys()
+			if d.cs.SortKeys {
+				sortValues(keys, d.cs)
+			}
+			for i, key := range keys {
+				d.dump(d.unpackValue(key))
+				d.w.Write(colonSpaceBytes)
+				d.ignoreNextIndent = true
+				d.dump(d.unpackValue(v.MapIndex(key)))
+				if i < (numEntries - 1) {
+					d.w.Write(commaNewlineBytes)
+				} else {
+					d.w.Write(newlineBytes)
+				}
+			}
+		}
+		d.depth--
+		d.indent()
+		d.w.Write(closeBraceBytes)
+
+	case reflect.Struct:
+		d.w.Write(openBraceNewlineBytes)
+		d.depth++
+		if (d.cs.MaxDepth != 0) && (d.depth > d.cs.MaxDepth) {
+			d.indent()
+			d.w.Write(maxNewlineBytes)
+		} else {
+			vt := v.Type()
+			numFields := v.NumField()
+			for i := 0; i < numFields; i++ {
+				d.indent()
+				vtf := vt.Field(i)
+				d.w.Write([]byte(vtf.Name))
+				d.w.Write(colonSpaceBytes)
+				d.ignoreNextIndent = true
+				d.dump(d.unpackValue(v.Field(i)))
+				if i < (numFields - 1) {
+					d.w.Write(commaNewlineBytes)
+				} else {
+					d.w.Write(newlineBytes)
+				}
+			}
+		}
+		d.depth--
+		d.indent()
+		d.w.Write(closeBraceBytes)
+
+	case reflect.Uintptr:
+		printHexPtr(d.w, uintptr(v.Uint()))
+
+	case reflect.UnsafePointer, reflect.Chan, reflect.Func:
+		printHexPtr(d.w, v.Pointer())
+
+	// There were not any other types at the time this code was written, but
+	// fall back to letting the default fmt package handle it in case any new
+	// types are added.
+	default:
+		if v.CanInterface() {
+			fmt.Fprintf(d.w, "%v", v.Interface())
+		} else {
+			fmt.Fprintf(d.w, "%v", v.String())
+		}
+	}
+}
+
+// fdump is a helper function to consolidate the logic from the various public
+// methods which take varying writers and config states.
+func fdump(cs *ConfigState, w io.Writer, a ...interface{}) {
+	for _, arg := range a {
+		if arg == nil {
+			w.Write(interfaceBytes)
+			w.Write(spaceBytes)
+			w.Write(nilAngleBytes)
+			w.Write(newlineBytes)
+			continue
+		}
+
+		d := dumpState{w: w, cs: cs}
+		d.pointers = make(map[uintptr]int)
+		d.dump(reflect.ValueOf(arg))
+		d.w.Write(newlineBytes)
+	}
+}
+
+// Fdump formats and displays the passed arguments to io.Writer w.  It formats
+// exactly the same as Dump.
+func Fdump(w io.Writer, a ...interface{}) {
+	fdump(&Config, w, a...)
+}
+
+// Sdump returns a string with the passed arguments formatted exactly the same
+// as Dump.
+func Sdump(a ...interface{}) string {
+	var buf bytes.Buffer
+	fdump(&Config, &buf, a...)
+	return buf.String()
+}
+
+/*
+Dump displays the passed parameters to standard out with newlines, customizable
+indentation, and additional debug information such as complete types and all
+pointer addresses used to indirect to the final value.  It provides the
+following features over the built-in printing facilities provided by the fmt
+package:
+
+	* Pointers are dereferenced and followed
+	* Circular data structures are detected and handled properly
+	* Custom Stringer/error interfaces are optionally invoked, including
+	  on unexported types
+	* Custom types which only implement the Stringer/error interfaces via
+	  a pointer receiver are optionally invoked when passing non-pointer
+	  variables
+	* Byte arrays and slices are dumped like the hexdump -C command which
+	  includes offsets, byte values in hex, and ASCII output
+
+The configuration options are controlled by an exported package global,
+spew.Config.  See ConfigState for options documentation.
+
+See Fdump if you would prefer dumping to an arbitrary io.Writer or Sdump to
+get the formatted result as a string.
+*/
+func Dump(a ...interface{}) {
+	fdump(&Config, os.Stdout, a...)
+}

vendor/github.com/davecgh/go-spew/spew/format.go

@@ -0,0 +1,419 @@
+/*
+ * Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+package spew
+
+import (
+	"bytes"
+	"fmt"
+	"reflect"
+	"strconv"
+	"strings"
+)
+
+// supportedFlags is a list of all the character flags supported by fmt package.
+const supportedFlags = "0-+# "
+
+// formatState implements the fmt.Formatter interface and contains information
+// about the state of a formatting operation.  The NewFormatter function can
+// be used to get a new Formatter which can be used directly as arguments
+// in standard fmt package printing calls.
+type formatState struct {
+	value          interface{}
+	fs             fmt.State
+	depth          int
+	pointers       map[uintptr]int
+	ignoreNextType bool
+	cs             *ConfigState
+}
+
+// buildDefaultFormat recreates the original format string without precision
+// and width information to pass in to fmt.Sprintf in the case of an
+// unrecognized type.  Unless new types are added to the language, this
+// function won't ever be called.
+func (f *formatState) buildDefaultFormat() (format string) {
+	buf := bytes.NewBuffer(percentBytes)
+
+	for _, flag := range supportedFlags {
+		if f.fs.Flag(int(flag)) {
+			buf.WriteRune(flag)
+		}
+	}
+
+	buf.WriteRune('v')
+
+	format = buf.String()
+	return format
+}
+
+// constructOrigFormat recreates the original format string including precision
+// and width information to pass along to the standard fmt package.  This allows
+// automatic deferral of all format strings this package doesn't support.
+func (f *formatState) constructOrigFormat(verb rune) (format string) {
+	buf := bytes.NewBuffer(percentBytes)
+
+	for _, flag := range supportedFlags {
+		if f.fs.Flag(int(flag)) {
+			buf.WriteRune(flag)
+		}
+	}
+
+	if width, ok := f.fs.Width(); ok {
+		buf.WriteString(strconv.Itoa(width))
+	}
+
+	if precision, ok := f.fs.Precision(); ok {
+		buf.Write(precisionBytes)
+		buf.WriteString(strconv.Itoa(precision))
+	}
+
+	buf.WriteRune(verb)
+
+	format = buf.String()
+	return format
+}
+
+// unpackValue returns values inside of non-nil interfaces when possible and
+// ensures that types for values which have been unpacked from an interface
+// are displayed when the show types flag is also set.
+// This is useful for data types like structs, arrays, slices, and maps which
+// can contain varying types packed inside an interface.
+func (f *formatState) unpackValue(v reflect.Value) reflect.Value {
+	if v.Kind() == reflect.Interface {
+		f.ignoreNextType = false
+		if !v.IsNil() {
+			v = v.Elem()
+		}
+	}
+	return v
+}
+
+// formatPtr handles formatting of pointers by indirecting them as necessary.
+func (f *formatState) formatPtr(v reflect.Value) {
+	// Display nil if top level pointer is nil.
+	showTypes := f.fs.Flag('#')
+	if v.IsNil() && (!showTypes || f.ignoreNextType) {
+		f.fs.Write(nilAngleBytes)
+		return
+	}
+
+	// Remove pointers at or below the current depth from map used to detect
+	// circular refs.
+	for k, depth := range f.pointers {
+		if depth >= f.depth {
+			delete(f.pointers, k)
+		}
+	}
+
+	// Keep list of all dereferenced pointers to possibly show later.
+	pointerChain := make([]uintptr, 0)
+
+	// Figure out how many levels of indirection there are by derferencing
+	// pointers and unpacking interfaces down the chain while detecting circular
+	// references.
+	nilFound := false
+	cycleFound := false
+	indirects := 0
+	ve := v
+	for ve.Kind() == reflect.Ptr {
+		if ve.IsNil() {
+			nilFound = true
+			break
+		}
+		indirects++
+		addr := ve.Pointer()
+		pointerChain = append(pointerChain, addr)
+		if pd, ok := f.pointers[addr]; ok && pd < f.depth {
+			cycleFound = true
+			indirects--
+			break
+		}
+		f.pointers[addr] = f.depth
+
+		ve = ve.Elem()
+		if ve.Kind() == reflect.Interface {
+			if ve.IsNil() {
+				nilFound = true
+				break
+			}
+			ve = ve.Elem()
+		}
+	}
+
+	// Display type or indirection level depending on flags.
+	if showTypes && !f.ignoreNextType {
+		f.fs.Write(openParenBytes)
+		f.fs.Write(bytes.Repeat(asteriskBytes, indirects))
+		f.fs.Write([]byte(ve.Type().String()))
+		f.fs.Write(closeParenBytes)
+	} else {
+		if nilFound || cycleFound {
+			indirects += strings.Count(ve.Type().String(), "*")
+		}
+		f.fs.Write(openAngleBytes)
+		f.fs.Write([]byte(strings.Repeat("*", indirects)))
+		f.fs.Write(closeAngleBytes)
+	}
+
+	// Display pointer information depending on flags.
+	if f.fs.Flag('+') && (len(pointerChain) > 0) {
+		f.fs.Write(openParenBytes)
+		for i, addr := range pointerChain {
+			if i > 0 {
+				f.fs.Write(pointerChainBytes)
+			}
+			printHexPtr(f.fs, addr)
+		}
+		f.fs.Write(closeParenBytes)
+	}
+
+	// Display dereferenced value.
+	switch {
+	case nilFound:
+		f.fs.Write(nilAngleBytes)
+
+	case cycleFound:
+		f.fs.Write(circularShortBytes)
+
+	default:
+		f.ignoreNextType = true
+		f.format(ve)
+	}
+}
+
+// format is the main workhorse for providing the Formatter interface.  It
+// uses the passed reflect value to figure out what kind of object we are
+// dealing with and formats it appropriately.  It is a recursive function,
+// however circular data structures are detected and handled properly.
+func (f *formatState) format(v reflect.Value) {
+	// Handle invalid reflect values immediately.
+	kind := v.Kind()
+	if kind == reflect.Invalid {
+		f.fs.Write(invalidAngleBytes)
+		return
+	}
+
+	// Handle pointers specially.
+	if kind == reflect.Ptr {
+		f.formatPtr(v)
+		return
+	}
+
+	// Print type information unless already handled elsewhere.
+	if !f.ignoreNextType && f.fs.Flag('#') {
+		f.fs.Write(openParenBytes)
+		f.fs.Write([]byte(v.Type().String()))
+		f.fs.Write(closeParenBytes)
+	}
+	f.ignoreNextType = false
+
+	// Call Stringer/error interfaces if they exist and the handle methods
+	// flag is enabled.
+	if !f.cs.DisableMethods {
+		if (kind != reflect.Invalid) && (kind != reflect.Interface) {
+			if handled := handleMethods(f.cs, f.fs, v); handled {
+				return
+			}
+		}
+	}
+
+	switch kind {
+	case reflect.Invalid:
+		// Do nothing.  We should never get here since invalid has already
+		// been handled above.
+
+	case reflect.Bool:
+		printBool(f.fs, v.Bool())
+
+	case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int:
+		printInt(f.fs, v.Int(), 10)
+
+	case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint:
+		printUint(f.fs, v.Uint(), 10)
+
+	case reflect.Float32:
+		printFloat(f.fs, v.Float(), 32)
+
+	case reflect.Float64:
+		printFloat(f.fs, v.Float(), 64)
+
+	case reflect.Complex64:
+		printComplex(f.fs, v.Complex(), 32)
+
+	case reflect.Complex128:
+		printComplex(f.fs, v.Complex(), 64)
+
+	case reflect.Slice:
+		if v.IsNil() {
+			f.fs.Write(nilAngleBytes)
+			break
+		}
+		fallthrough
+
+	case reflect.Array:
+		f.fs.Write(openBracketBytes)
+		f.depth++
+		if (f.cs.MaxDepth != 0) && (f.depth > f.cs.MaxDepth) {
+			f.fs.Write(maxShortBytes)
+		} else {
+			numEntries := v.Len()
+			for i := 0; i < numEntries; i++ {
+				if i > 0 {
+					f.fs.Write(spaceBytes)
+				}
+				f.ignoreNextType = true
+				f.format(f.unpackValue(v.Index(i)))
+			}
+		}
+		f.depth--
+		f.fs.Write(closeBracketBytes)
+
+	case reflect.String:
+		f.fs.Write([]byte(v.String()))
+
+	case reflect.Interface:
+		// The only time we should get here is for nil interfaces due to
+		// unpackValue calls.
+		if v.IsNil() {
+			f.fs.Write(nilAngleBytes)
+		}
+
+	case reflect.Ptr:
+		// Do nothing.  We should never get here since pointers have already
+		// been handled above.
+
+	case reflect.Map:
+		// nil maps should be indicated as different than empty maps
+		if v.IsNil() {
+			f.fs.Write(nilAngleBytes)
+			break
+		}
+
+		f.fs.Write(openMapBytes)
+		f.depth++
+		if (f.cs.MaxDepth != 0) && (f.depth > f.cs.MaxDepth) {
+			f.fs.Write(maxShortBytes)
+		} else {
+			keys := v.MapKeys()
+			if f.cs.SortKeys {
+				sortValues(keys, f.cs)
+			}
+			for i, key := range keys {
+				if i > 0 {
+					f.fs.Write(spaceBytes)
+				}
+				f.ignoreNextType = true
+				f.format(f.unpackValue(key))
+				f.fs.Write(colonBytes)
+				f.ignoreNextType = true
+				f.format(f.unpackValue(v.MapIndex(key)))
+			}
+		}
+		f.depth--
+		f.fs.Write(closeMapBytes)
+
+	case reflect.Struct:
+		numFields := v.NumField()
+		f.fs.Write(openBraceBytes)
+		f.depth++
+		if (f.cs.MaxDepth != 0) && (f.depth > f.cs.MaxDepth) {
+			f.fs.Write(maxShortBytes)
+		} else {
+			vt := v.Type()
+			for i := 0; i < numFields; i++ {
+				if i > 0 {
+					f.fs.Write(spaceBytes)
+				}
+				vtf := vt.Field(i)
+				if f.fs.Flag('+') || f.fs.Flag('#') {
+					f.fs.Write([]byte(vtf.Name))
+					f.fs.Write(colonBytes)
+				}
+				f.format(f.unpackValue(v.Field(i)))
+			}
+		}
+		f.depth--
+		f.fs.Write(closeBraceBytes)
+
+	case reflect.Uintptr:
+		printHexPtr(f.fs, uintptr(v.Uint()))
+
+	case reflect.UnsafePointer, reflect.Chan, reflect.Func:
+		printHexPtr(f.fs, v.Pointer())
+
+	// There were not any other types at the time this code was written, but
+	// fall back to letting the default fmt package handle it if any get added.
+	default:
+		format := f.buildDefaultFormat()
+		if v.CanInterface() {
+			fmt.Fprintf(f.fs, format, v.Interface())
+		} else {
+			fmt.Fprintf(f.fs, format, v.String())
+		}
+	}
+}
+
+// Format satisfies the fmt.Formatter interface. See NewFormatter for usage
+// details.
+func (f *formatState) Format(fs fmt.State, verb rune) {
+	f.fs = fs
+
+	// Use standard formatting for verbs that are not v.
+	if verb != 'v' {
+		format := f.constructOrigFormat(verb)
+		fmt.Fprintf(fs, format, f.value)
+		return
+	}
+
+	if f.value == nil {
+		if fs.Flag('#') {
+			fs.Write(interfaceBytes)
+		}
+		fs.Write(nilAngleBytes)
+		return
+	}
+
+	f.format(reflect.ValueOf(f.value))
+}
+
+// newFormatter is a helper function to consolidate the logic from the various
+// public methods which take varying config states.
+func newFormatter(cs *ConfigState, v interface{}) fmt.Formatter {
+	fs := &formatState{value: v, cs: cs}
+	fs.pointers = make(map[uintptr]int)
+	return fs
+}
+
+/*
+NewFormatter returns a custom formatter that satisfies the fmt.Formatter
+interface.  As a result, it integrates cleanly with standard fmt package
+printing functions.  The formatter is useful for inline printing of smaller data
+types similar to the standard %v format specifier.
+
+The custom formatter only responds to the %v (most compact), %+v (adds pointer
+addresses), %#v (adds types), or %#+v (adds types and pointer addresses) verb
+combinations.  Any other verbs such as %x and %q will be sent to the the
+standard fmt package for formatting.  In addition, the custom formatter ignores
+the width and precision arguments (however they will still work on the format
+specifiers not handled by the custom formatter).
+
+Typically this function shouldn't be called directly.  It is much easier to make
+use of the custom formatter by calling one of the convenience functions such as
+Printf, Println, or Fprintf.
+*/
+func NewFormatter(v interface{}) fmt.Formatter {
+	return newFormatter(&Config, v)
+}

vendor/github.com/davecgh/go-spew/spew/spew.go

@@ -0,0 +1,148 @@
+/*
+ * Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+package spew
+
+import (
+	"fmt"
+	"io"
+)
+
+// Errorf is a wrapper for fmt.Errorf that treats each argument as if it were
+// passed with a default Formatter interface returned by NewFormatter.  It
+// returns the formatted string as a value that satisfies error.  See
+// NewFormatter for formatting details.
+//
+// This function is shorthand for the following syntax:
+//
+//	fmt.Errorf(format, spew.NewFormatter(a), spew.NewFormatter(b))
+func Errorf(format string, a ...interface{}) (err error) {
+	return fmt.Errorf(format, convertArgs(a)...)
+}
+
+// Fprint is a wrapper for fmt.Fprint that treats each argument as if it were
+// passed with a default Formatter interface returned by NewFormatter.  It
+// returns the number of bytes written and any write error encountered.  See
+// NewFormatter for formatting details.
+//
+// This function is shorthand for the following syntax:
+//
+//	fmt.Fprint(w, spew.NewFormatter(a), spew.NewFormatter(b))
+func Fprint(w io.Writer, a ...interface{}) (n int, err error) {
+	return fmt.Fprint(w, convertArgs(a)...)
+}
+
+// Fprintf is a wrapper for fmt.Fprintf that treats each argument as if it were
+// passed with a default Formatter interface returned by NewFormatter.  It
+// returns the number of bytes written and any write error encountered.  See
+// NewFormatter for formatting details.
+//
+// This function is shorthand for the following syntax:
+//
+//	fmt.Fprintf(w, format, spew.NewFormatter(a), spew.NewFormatter(b))
+func Fprintf(w io.Writer, format string, a ...interface{}) (n int, err error) {
+	return fmt.Fprintf(w, format, convertArgs(a)...)
+}
+
+// Fprintln is a wrapper for fmt.Fprintln that treats each argument as if it
+// passed with a default Formatter interface returned by NewFormatter.  See
+// NewFormatter for formatting details.
+//
+// This function is shorthand for the following syntax:
+//
+//	fmt.Fprintln(w, spew.NewFormatter(a), spew.NewFormatter(b))
+func Fprintln(w io.Writer, a ...interface{}) (n int, err error) {
+	return fmt.Fprintln(w, convertArgs(a)...)
+}
+
+// Print is a wrapper for fmt.Print that treats each argument as if it were
+// passed with a default Formatter interface returned by NewFormatter.  It
+// returns the number of bytes written and any write error encountered.  See
+// NewFormatter for formatting details.
+//
+// This function is shorthand for the following syntax:
+//
+//	fmt.Print(spew.NewFormatter(a), spew.NewFormatter(b))
+func Print(a ...interface{}) (n int, err error) {
+	return fmt.Print(convertArgs(a)...)
+}
+
+// Printf is a wrapper for fmt.Printf that treats each argument as if it were
+// passed with a default Formatter interface returned by NewFormatter.  It
+// returns the number of bytes written and any write error encountered.  See
+// NewFormatter for formatting details.
+//
+// This function is shorthand for the following syntax:
+//
+//	fmt.Printf(format, spew.NewFormatter(a), spew.NewFormatter(b))
+func Printf(format string, a ...interface{}) (n int, err error) {
+	return fmt.Printf(format, convertArgs(a)...)
+}
+
+// Println is a wrapper for fmt.Println that treats each argument as if it were
+// passed with a default Formatter interface returned by NewFormatter.  It
+// returns the number of bytes written and any write error encountered.  See
+// NewFormatter for formatting details.
+//
+// This function is shorthand for the following syntax:
+//
+//	fmt.Println(spew.NewFormatter(a), spew.NewFormatter(b))
+func Println(a ...interface{}) (n int, err error) {
+	return fmt.Println(convertArgs(a)...)
+}
+
+// Sprint is a wrapper for fmt.Sprint that treats each argument as if it were
+// passed with a default Formatter interface returned by NewFormatter.  It
+// returns the resulting string.  See NewFormatter for formatting details.
+//
+// This function is shorthand for the following syntax:
+//
+//	fmt.Sprint(spew.NewFormatter(a), spew.NewFormatter(b))
+func Sprint(a ...interface{}) string {
+	return fmt.Sprint(convertArgs(a)...)
+}
+
+// Sprintf is a wrapper for fmt.Sprintf that treats each argument as if it were
+// passed with a default Formatter interface returned by NewFormatter.  It
+// returns the resulting string.  See NewFormatter for formatting details.
+//
+// This function is shorthand for the following syntax:
+//
+//	fmt.Sprintf(format, spew.NewFormatter(a), spew.NewFormatter(b))
+func Sprintf(format string, a ...interface{}) string {
+	return fmt.Sprintf(format, convertArgs(a)...)
+}
+
+// Sprintln is a wrapper for fmt.Sprintln that treats each argument as if it
+// were passed with a default Formatter interface returned by NewFormatter.  It
+// returns the resulting string.  See NewFormatter for formatting details.
+//
+// This function is shorthand for the following syntax:
+//
+//	fmt.Sprintln(spew.NewFormatter(a), spew.NewFormatter(b))
+func Sprintln(a ...interface{}) string {
+	return fmt.Sprintln(convertArgs(a)...)
+}
+
+// convertArgs accepts a slice of arguments and returns a slice of the same
+// length with each argument converted to a default spew Formatter interface.
+func convertArgs(args []interface{}) (formatters []interface{}) {
+	formatters = make([]interface{}, len(args))
+	for index, arg := range args {
+		formatters[index] = NewFormatter(arg)
+	}
+	return formatters
+}

vendor/github.com/opencontainers/runtime-spec/LICENSE

@@ -0,0 +1,191 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2015 The Linux Foundation.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/opencontainers/runtime-spec/specs-go/config.go

@@ -0,0 +1,689 @@
+package specs
+
+import "os"
+
+// Spec is the base configuration for the container.
+type Spec struct {
+	// Version of the Open Container Initiative Runtime Specification with which the bundle complies.
+	Version string `json:"ociVersion"`
+	// Process configures the container process.
+	Process *Process `json:"process,omitempty"`
+	// Root configures the container's root filesystem.
+	Root *Root `json:"root,omitempty"`
+	// Hostname configures the container's hostname.
+	Hostname string `json:"hostname,omitempty"`
+	// Mounts configures additional mounts (on top of Root).
+	Mounts []Mount `json:"mounts,omitempty"`
+	// Hooks configures callbacks for container lifecycle events.
+	Hooks *Hooks `json:"hooks,omitempty" platform:"linux,solaris"`
+	// Annotations contains arbitrary metadata for the container.
+	Annotations map[string]string `json:"annotations,omitempty"`
+
+	// Linux is platform-specific configuration for Linux based containers.
+	Linux *Linux `json:"linux,omitempty" platform:"linux"`
+	// Solaris is platform-specific configuration for Solaris based containers.
+	Solaris *Solaris `json:"solaris,omitempty" platform:"solaris"`
+	// Windows is platform-specific configuration for Windows based containers.
+	Windows *Windows `json:"windows,omitempty" platform:"windows"`
+	// VM specifies configuration for virtual-machine-based containers.
+	VM *VM `json:"vm,omitempty" platform:"vm"`
+}
+
+// Process contains information to start a specific application inside the container.
+type Process struct {
+	// Terminal creates an interactive terminal for the container.
+	Terminal bool `json:"terminal,omitempty"`
+	// ConsoleSize specifies the size of the console.
+	ConsoleSize *Box `json:"consoleSize,omitempty"`
+	// User specifies user information for the process.
+	User User `json:"user"`
+	// Args specifies the binary and arguments for the application to execute.
+	Args []string `json:"args,omitempty"`
+	// CommandLine specifies the full command line for the application to execute on Windows.
+	CommandLine string `json:"commandLine,omitempty" platform:"windows"`
+	// Env populates the process environment for the process.
+	Env []string `json:"env,omitempty"`
+	// Cwd is the current working directory for the process and must be
+	// relative to the container's root.
+	Cwd string `json:"cwd"`
+	// Capabilities are Linux capabilities that are kept for the process.
+	Capabilities *LinuxCapabilities `json:"capabilities,omitempty" platform:"linux"`
+	// Rlimits specifies rlimit options to apply to the process.
+	Rlimits []POSIXRlimit `json:"rlimits,omitempty" platform:"linux,solaris"`
+	// NoNewPrivileges controls whether additional privileges could be gained by processes in the container.
+	NoNewPrivileges bool `json:"noNewPrivileges,omitempty" platform:"linux"`
+	// ApparmorProfile specifies the apparmor profile for the container.
+	ApparmorProfile string `json:"apparmorProfile,omitempty" platform:"linux"`
+	// Specify an oom_score_adj for the container.
+	OOMScoreAdj *int `json:"oomScoreAdj,omitempty" platform:"linux"`
+	// SelinuxLabel specifies the selinux context that the container process is run as.
+	SelinuxLabel string `json:"selinuxLabel,omitempty" platform:"linux"`
+}
+
+// LinuxCapabilities specifies the whitelist of capabilities that are kept for a process.
+// http://man7.org/linux/man-pages/man7/capabilities.7.html
+type LinuxCapabilities struct {
+	// Bounding is the set of capabilities checked by the kernel.
+	Bounding []string `json:"bounding,omitempty" platform:"linux"`
+	// Effective is the set of capabilities checked by the kernel.
+	Effective []string `json:"effective,omitempty" platform:"linux"`
+	// Inheritable is the capabilities preserved across execve.
+	Inheritable []string `json:"inheritable,omitempty" platform:"linux"`
+	// Permitted is the limiting superset for effective capabilities.
+	Permitted []string `json:"permitted,omitempty" platform:"linux"`
+	// Ambient is the ambient set of capabilities that are kept.
+	Ambient []string `json:"ambient,omitempty" platform:"linux"`
+}
+
+// Box specifies dimensions of a rectangle. Used for specifying the size of a console.
+type Box struct {
+	// Height is the vertical dimension of a box.
+	Height uint `json:"height"`
+	// Width is the horizontal dimension of a box.
+	Width uint `json:"width"`
+}
+
+// User specifies specific user (and group) information for the container process.
+type User struct {
+	// UID is the user id.
+	UID uint32 `json:"uid" platform:"linux,solaris"`
+	// GID is the group id.
+	GID uint32 `json:"gid" platform:"linux,solaris"`
+	// Umask is the umask for the init process.
+	Umask uint32 `json:"umask,omitempty" platform:"linux,solaris"`
+	// AdditionalGids are additional group ids set for the container's process.
+	AdditionalGids []uint32 `json:"additionalGids,omitempty" platform:"linux,solaris"`
+	// Username is the user name.
+	Username string `json:"username,omitempty" platform:"windows"`
+}
+
+// Root contains information about the container's root filesystem on the host.
+type Root struct {
+	// Path is the absolute path to the container's root filesystem.
+	Path string `json:"path"`
+	// Readonly makes the root filesystem for the container readonly before the process is executed.
+	Readonly bool `json:"readonly,omitempty"`
+}
+
+// Mount specifies a mount for a container.
+type Mount struct {
+	// Destination is the absolute path where the mount will be placed in the container.
+	Destination string `json:"destination"`
+	// Type specifies the mount kind.
+	Type string `json:"type,omitempty" platform:"linux,solaris"`
+	// Source specifies the source path of the mount.
+	Source string `json:"source,omitempty"`
+	// Options are fstab style mount options.
+	Options []string `json:"options,omitempty"`
+}
+
+// Hook specifies a command that is run at a particular event in the lifecycle of a container
+type Hook struct {
+	Path    string   `json:"path"`
+	Args    []string `json:"args,omitempty"`
+	Env     []string `json:"env,omitempty"`
+	Timeout *int     `json:"timeout,omitempty"`
+}
+
+// Hooks specifies a command that is run in the container at a particular event in the lifecycle of a container
+// Hooks for container setup and teardown
+type Hooks struct {
+	// Prestart is Deprecated. Prestart is a list of hooks to be run before the container process is executed.
+	// It is called in the Runtime Namespace
+	Prestart []Hook `json:"prestart,omitempty"`
+	// CreateRuntime is a list of hooks to be run after the container has been created but before pivot_root or any equivalent operation has been called
+	// It is called in the Runtime Namespace
+	CreateRuntime []Hook `json:"createRuntime,omitempty"`
+	// CreateContainer is a list of hooks to be run after the container has been created but before pivot_root or any equivalent operation has been called
+	// It is called in the Container Namespace
+	CreateContainer []Hook `json:"createContainer,omitempty"`
+	// StartContainer is a list of hooks to be run after the start operation is called but before the container process is started
+	// It is called in the Container Namespace
+	StartContainer []Hook `json:"startContainer,omitempty"`
+	// Poststart is a list of hooks to be run after the container process is started.
+	// It is called in the Runtime Namespace
+	Poststart []Hook `json:"poststart,omitempty"`
+	// Poststop is a list of hooks to be run after the container process exits.
+	// It is called in the Runtime Namespace
+	Poststop []Hook `json:"poststop,omitempty"`
+}
+
+// Linux contains platform-specific configuration for Linux based containers.
+type Linux struct {
+	// UIDMapping specifies user mappings for supporting user namespaces.
+	UIDMappings []LinuxIDMapping `json:"uidMappings,omitempty"`
+	// GIDMapping specifies group mappings for supporting user namespaces.
+	GIDMappings []LinuxIDMapping `json:"gidMappings,omitempty"`
+	// Sysctl are a set of key value pairs that are set for the container on start
+	Sysctl map[string]string `json:"sysctl,omitempty"`
+	// Resources contain cgroup information for handling resource constraints
+	// for the container
+	Resources *LinuxResources `json:"resources,omitempty"`
+	// CgroupsPath specifies the path to cgroups that are created and/or joined by the container.
+	// The path is expected to be relative to the cgroups mountpoint.
+	// If resources are specified, the cgroups at CgroupsPath will be updated based on resources.
+	CgroupsPath string `json:"cgroupsPath,omitempty"`
+	// Namespaces contains the namespaces that are created and/or joined by the container
+	Namespaces []LinuxNamespace `json:"namespaces,omitempty"`
+	// Devices are a list of device nodes that are created for the container
+	Devices []LinuxDevice `json:"devices,omitempty"`
+	// Seccomp specifies the seccomp security settings for the container.
+	Seccomp *LinuxSeccomp `json:"seccomp,omitempty"`
+	// RootfsPropagation is the rootfs mount propagation mode for the container.
+	RootfsPropagation string `json:"rootfsPropagation,omitempty"`
+	// MaskedPaths masks over the provided paths inside the container.
+	MaskedPaths []string `json:"maskedPaths,omitempty"`
+	// ReadonlyPaths sets the provided paths as RO inside the container.
+	ReadonlyPaths []string `json:"readonlyPaths,omitempty"`
+	// MountLabel specifies the selinux context for the mounts in the container.
+	MountLabel string `json:"mountLabel,omitempty"`
+	// IntelRdt contains Intel Resource Director Technology (RDT) information for
+	// handling resource constraints (e.g., L3 cache, memory bandwidth) for the container
+	IntelRdt *LinuxIntelRdt `json:"intelRdt,omitempty"`
+	// Personality contains configuration for the Linux personality syscall
+	Personality *LinuxPersonality `json:"personality,omitempty"`
+}
+
+// LinuxNamespace is the configuration for a Linux namespace
+type LinuxNamespace struct {
+	// Type is the type of namespace
+	Type LinuxNamespaceType `json:"type"`
+	// Path is a path to an existing namespace persisted on disk that can be joined
+	// and is of the same type
+	Path string `json:"path,omitempty"`
+}
+
+// LinuxNamespaceType is one of the Linux namespaces
+type LinuxNamespaceType string
+
+const (
+	// PIDNamespace for isolating process IDs
+	PIDNamespace LinuxNamespaceType = "pid"
+	// NetworkNamespace for isolating network devices, stacks, ports, etc
+	NetworkNamespace LinuxNamespaceType = "network"
+	// MountNamespace for isolating mount points
+	MountNamespace LinuxNamespaceType = "mount"
+	// IPCNamespace for isolating System V IPC, POSIX message queues
+	IPCNamespace LinuxNamespaceType = "ipc"
+	// UTSNamespace for isolating hostname and NIS domain name
+	UTSNamespace LinuxNamespaceType = "uts"
+	// UserNamespace for isolating user and group IDs
+	UserNamespace LinuxNamespaceType = "user"
+	// CgroupNamespace for isolating cgroup hierarchies
+	CgroupNamespace LinuxNamespaceType = "cgroup"
+)
+
+// LinuxIDMapping specifies UID/GID mappings
+type LinuxIDMapping struct {
+	// ContainerID is the starting UID/GID in the container
+	ContainerID uint32 `json:"containerID"`
+	// HostID is the starting UID/GID on the host to be mapped to 'ContainerID'
+	HostID uint32 `json:"hostID"`
+	// Size is the number of IDs to be mapped
+	Size uint32 `json:"size"`
+}
+
+// POSIXRlimit type and restrictions
+type POSIXRlimit struct {
+	// Type of the rlimit to set
+	Type string `json:"type"`
+	// Hard is the hard limit for the specified type
+	Hard uint64 `json:"hard"`
+	// Soft is the soft limit for the specified type
+	Soft uint64 `json:"soft"`
+}
+
+// LinuxHugepageLimit structure corresponds to limiting kernel hugepages
+type LinuxHugepageLimit struct {
+	// Pagesize is the hugepage size
+	// Format: "<size><unit-prefix>B' (e.g. 64KB, 2MB, 1GB, etc.)
+	Pagesize string `json:"pageSize"`
+	// Limit is the limit of "hugepagesize" hugetlb usage
+	Limit uint64 `json:"limit"`
+}
+
+// LinuxInterfacePriority for network interfaces
+type LinuxInterfacePriority struct {
+	// Name is the name of the network interface
+	Name string `json:"name"`
+	// Priority for the interface
+	Priority uint32 `json:"priority"`
+}
+
+// linuxBlockIODevice holds major:minor format supported in blkio cgroup
+type linuxBlockIODevice struct {
+	// Major is the device's major number.
+	Major int64 `json:"major"`
+	// Minor is the device's minor number.
+	Minor int64 `json:"minor"`
+}
+
+// LinuxWeightDevice struct holds a `major:minor weight` pair for weightDevice
+type LinuxWeightDevice struct {
+	linuxBlockIODevice
+	// Weight is the bandwidth rate for the device.
+	Weight *uint16 `json:"weight,omitempty"`
+	// LeafWeight is the bandwidth rate for the device while competing with the cgroup's child cgroups, CFQ scheduler only
+	LeafWeight *uint16 `json:"leafWeight,omitempty"`
+}
+
+// LinuxThrottleDevice struct holds a `major:minor rate_per_second` pair
+type LinuxThrottleDevice struct {
+	linuxBlockIODevice
+	// Rate is the IO rate limit per cgroup per device
+	Rate uint64 `json:"rate"`
+}
+
+// LinuxBlockIO for Linux cgroup 'blkio' resource management
+type LinuxBlockIO struct {
+	// Specifies per cgroup weight
+	Weight *uint16 `json:"weight,omitempty"`
+	// Specifies tasks' weight in the given cgroup while competing with the cgroup's child cgroups, CFQ scheduler only
+	LeafWeight *uint16 `json:"leafWeight,omitempty"`
+	// Weight per cgroup per device, can override BlkioWeight
+	WeightDevice []LinuxWeightDevice `json:"weightDevice,omitempty"`
+	// IO read rate limit per cgroup per device, bytes per second
+	ThrottleReadBpsDevice []LinuxThrottleDevice `json:"throttleReadBpsDevice,omitempty"`
+	// IO write rate limit per cgroup per device, bytes per second
+	ThrottleWriteBpsDevice []LinuxThrottleDevice `json:"throttleWriteBpsDevice,omitempty"`
+	// IO read rate limit per cgroup per device, IO per second
+	ThrottleReadIOPSDevice []LinuxThrottleDevice `json:"throttleReadIOPSDevice,omitempty"`
+	// IO write rate limit per cgroup per device, IO per second
+	ThrottleWriteIOPSDevice []LinuxThrottleDevice `json:"throttleWriteIOPSDevice,omitempty"`
+}
+
+// LinuxMemory for Linux cgroup 'memory' resource management
+type LinuxMemory struct {
+	// Memory limit (in bytes).
+	Limit *int64 `json:"limit,omitempty"`
+	// Memory reservation or soft_limit (in bytes).
+	Reservation *int64 `json:"reservation,omitempty"`
+	// Total memory limit (memory + swap).
+	Swap *int64 `json:"swap,omitempty"`
+	// Kernel memory limit (in bytes).
+	Kernel *int64 `json:"kernel,omitempty"`
+	// Kernel memory limit for tcp (in bytes)
+	KernelTCP *int64 `json:"kernelTCP,omitempty"`
+	// How aggressive the kernel will swap memory pages.
+	Swappiness *uint64 `json:"swappiness,omitempty"`
+	// DisableOOMKiller disables the OOM killer for out of memory conditions
+	DisableOOMKiller *bool `json:"disableOOMKiller,omitempty"`
+	// Enables hierarchical memory accounting
+	UseHierarchy *bool `json:"useHierarchy,omitempty"`
+}
+
+// LinuxCPU for Linux cgroup 'cpu' resource management
+type LinuxCPU struct {
+	// CPU shares (relative weight (ratio) vs. other cgroups with cpu shares).
+	Shares *uint64 `json:"shares,omitempty"`
+	// CPU hardcap limit (in usecs). Allowed cpu time in a given period.
+	Quota *int64 `json:"quota,omitempty"`
+	// CPU period to be used for hardcapping (in usecs).
+	Period *uint64 `json:"period,omitempty"`
+	// How much time realtime scheduling may use (in usecs).
+	RealtimeRuntime *int64 `json:"realtimeRuntime,omitempty"`
+	// CPU period to be used for realtime scheduling (in usecs).
+	RealtimePeriod *uint64 `json:"realtimePeriod,omitempty"`
+	// CPUs to use within the cpuset. Default is to use any CPU available.
+	Cpus string `json:"cpus,omitempty"`
+	// List of memory nodes in the cpuset. Default is to use any available memory node.
+	Mems string `json:"mems,omitempty"`
+}
+
+// LinuxPids for Linux cgroup 'pids' resource management (Linux 4.3)
+type LinuxPids struct {
+	// Maximum number of PIDs. Default is "no limit".
+	Limit int64 `json:"limit"`
+}
+
+// LinuxNetwork identification and priority configuration
+type LinuxNetwork struct {
+	// Set class identifier for container's network packets
+	ClassID *uint32 `json:"classID,omitempty"`
+	// Set priority of network traffic for container
+	Priorities []LinuxInterfacePriority `json:"priorities,omitempty"`
+}
+
+// LinuxRdma for Linux cgroup 'rdma' resource management (Linux 4.11)
+type LinuxRdma struct {
+	// Maximum number of HCA handles that can be opened. Default is "no limit".
+	HcaHandles *uint32 `json:"hcaHandles,omitempty"`
+	// Maximum number of HCA objects that can be created. Default is "no limit".
+	HcaObjects *uint32 `json:"hcaObjects,omitempty"`
+}
+
+// LinuxResources has container runtime resource constraints
+type LinuxResources struct {
+	// Devices configures the device whitelist.
+	Devices []LinuxDeviceCgroup `json:"devices,omitempty"`
+	// Memory restriction configuration
+	Memory *LinuxMemory `json:"memory,omitempty"`
+	// CPU resource restriction configuration
+	CPU *LinuxCPU `json:"cpu,omitempty"`
+	// Task resource restriction configuration.
+	Pids *LinuxPids `json:"pids,omitempty"`
+	// BlockIO restriction configuration
+	BlockIO *LinuxBlockIO `json:"blockIO,omitempty"`
+	// Hugetlb limit (in bytes)
+	HugepageLimits []LinuxHugepageLimit `json:"hugepageLimits,omitempty"`
+	// Network restriction configuration
+	Network *LinuxNetwork `json:"network,omitempty"`
+	// Rdma resource restriction configuration.
+	// Limits are a set of key value pairs that define RDMA resource limits,
+	// where the key is device name and value is resource limits.
+	Rdma map[string]LinuxRdma `json:"rdma,omitempty"`
+}
+
+// LinuxDevice represents the mknod information for a Linux special device file
+type LinuxDevice struct {
+	// Path to the device.
+	Path string `json:"path"`
+	// Device type, block, char, etc.
+	Type string `json:"type"`
+	// Major is the device's major number.
+	Major int64 `json:"major"`
+	// Minor is the device's minor number.
+	Minor int64 `json:"minor"`
+	// FileMode permission bits for the device.
+	FileMode *os.FileMode `json:"fileMode,omitempty"`
+	// UID of the device.
+	UID *uint32 `json:"uid,omitempty"`
+	// Gid of the device.
+	GID *uint32 `json:"gid,omitempty"`
+}
+
+// LinuxDeviceCgroup represents a device rule for the whitelist controller
+type LinuxDeviceCgroup struct {
+	// Allow or deny
+	Allow bool `json:"allow"`
+	// Device type, block, char, etc.
+	Type string `json:"type,omitempty"`
+	// Major is the device's major number.
+	Major *int64 `json:"major,omitempty"`
+	// Minor is the device's minor number.
+	Minor *int64 `json:"minor,omitempty"`
+	// Cgroup access permissions format, rwm.
+	Access string `json:"access,omitempty"`
+}
+
+// LinuxPersonalityDomain refers to a personality domain.
+type LinuxPersonalityDomain string
+
+// LinuxPersonalityFlag refers to an additional personality flag. None are currently defined.
+type LinuxPersonalityFlag string
+
+// Define domain and flags for Personality
+const (
+	// PerLinux is the standard Linux personality
+	PerLinux LinuxPersonalityDomain = "LINUX"
+	// PerLinux32 sets personality to 32 bit
+	PerLinux32 LinuxPersonalityDomain = "LINUX32"
+)
+
+// LinuxPersonality represents the Linux personality syscall input
+type LinuxPersonality struct {
+	// Domain for the personality
+	Domain LinuxPersonalityDomain `json:"domain"`
+	// Additional flags
+	Flags []LinuxPersonalityFlag `json:"flags,omitempty"`
+}
+
+// Solaris contains platform-specific configuration for Solaris application containers.
+type Solaris struct {
+	// SMF FMRI which should go "online" before we start the container process.
+	Milestone string `json:"milestone,omitempty"`
+	// Maximum set of privileges any process in this container can obtain.
+	LimitPriv string `json:"limitpriv,omitempty"`
+	// The maximum amount of shared memory allowed for this container.
+	MaxShmMemory string `json:"maxShmMemory,omitempty"`
+	// Specification for automatic creation of network resources for this container.
+	Anet []SolarisAnet `json:"anet,omitempty"`
+	// Set limit on the amount of CPU time that can be used by container.
+	CappedCPU *SolarisCappedCPU `json:"cappedCPU,omitempty"`
+	// The physical and swap caps on the memory that can be used by this container.
+	CappedMemory *SolarisCappedMemory `json:"cappedMemory,omitempty"`
+}
+
+// SolarisCappedCPU allows users to set limit on the amount of CPU time that can be used by container.
+type SolarisCappedCPU struct {
+	Ncpus string `json:"ncpus,omitempty"`
+}
+
+// SolarisCappedMemory allows users to set the physical and swap caps on the memory that can be used by this container.
+type SolarisCappedMemory struct {
+	Physical string `json:"physical,omitempty"`
+	Swap     string `json:"swap,omitempty"`
+}
+
+// SolarisAnet provides the specification for automatic creation of network resources for this container.
+type SolarisAnet struct {
+	// Specify a name for the automatically created VNIC datalink.
+	Linkname string `json:"linkname,omitempty"`
+	// Specify the link over which the VNIC will be created.
+	Lowerlink string `json:"lowerLink,omitempty"`
+	// The set of IP addresses that the container can use.
+	Allowedaddr string `json:"allowedAddress,omitempty"`
+	// Specifies whether allowedAddress limitation is to be applied to the VNIC.
+	Configallowedaddr string `json:"configureAllowedAddress,omitempty"`
+	// The value of the optional default router.
+	Defrouter string `json:"defrouter,omitempty"`
+	// Enable one or more types of link protection.
+	Linkprotection string `json:"linkProtection,omitempty"`
+	// Set the VNIC's macAddress
+	Macaddress string `json:"macAddress,omitempty"`
+}
+
+// Windows defines the runtime configuration for Windows based containers, including Hyper-V containers.
+type Windows struct {
+	// LayerFolders contains a list of absolute paths to directories containing image layers.
+	LayerFolders []string `json:"layerFolders"`
+	// Devices are the list of devices to be mapped into the container.
+	Devices []WindowsDevice `json:"devices,omitempty"`
+	// Resources contains information for handling resource constraints for the container.
+	Resources *WindowsResources `json:"resources,omitempty"`
+	// CredentialSpec contains a JSON object describing a group Managed Service Account (gMSA) specification.
+	CredentialSpec interface{} `json:"credentialSpec,omitempty"`
+	// Servicing indicates if the container is being started in a mode to apply a Windows Update servicing operation.
+	Servicing bool `json:"servicing,omitempty"`
+	// IgnoreFlushesDuringBoot indicates if the container is being started in a mode where disk writes are not flushed during its boot process.
+	IgnoreFlushesDuringBoot bool `json:"ignoreFlushesDuringBoot,omitempty"`
+	// HyperV contains information for running a container with Hyper-V isolation.
+	HyperV *WindowsHyperV `json:"hyperv,omitempty"`
+	// Network restriction configuration.
+	Network *WindowsNetwork `json:"network,omitempty"`
+}
+
+// WindowsDevice represents information about a host device to be mapped into the container.
+type WindowsDevice struct {
+	// Device identifier: interface class GUID, etc.
+	ID string `json:"id"`
+	// Device identifier type: "class", etc.
+	IDType string `json:"idType"`
+}
+
+// WindowsResources has container runtime resource constraints for containers running on Windows.
+type WindowsResources struct {
+	// Memory restriction configuration.
+	Memory *WindowsMemoryResources `json:"memory,omitempty"`
+	// CPU resource restriction configuration.
+	CPU *WindowsCPUResources `json:"cpu,omitempty"`
+	// Storage restriction configuration.
+	Storage *WindowsStorageResources `json:"storage,omitempty"`
+}
+
+// WindowsMemoryResources contains memory resource management settings.
+type WindowsMemoryResources struct {
+	// Memory limit in bytes.
+	Limit *uint64 `json:"limit,omitempty"`
+}
+
+// WindowsCPUResources contains CPU resource management settings.
+type WindowsCPUResources struct {
+	// Number of CPUs available to the container.
+	Count *uint64 `json:"count,omitempty"`
+	// CPU shares (relative weight to other containers with cpu shares).
+	Shares *uint16 `json:"shares,omitempty"`
+	// Specifies the portion of processor cycles that this container can use as a percentage times 100.
+	Maximum *uint16 `json:"maximum,omitempty"`
+}
+
+// WindowsStorageResources contains storage resource management settings.
+type WindowsStorageResources struct {
+	// Specifies maximum Iops for the system drive.
+	Iops *uint64 `json:"iops,omitempty"`
+	// Specifies maximum bytes per second for the system drive.
+	Bps *uint64 `json:"bps,omitempty"`
+	// Sandbox size specifies the minimum size of the system drive in bytes.
+	SandboxSize *uint64 `json:"sandboxSize,omitempty"`
+}
+
+// WindowsNetwork contains network settings for Windows containers.
+type WindowsNetwork struct {
+	// List of HNS endpoints that the container should connect to.
+	EndpointList []string `json:"endpointList,omitempty"`
+	// Specifies if unqualified DNS name resolution is allowed.
+	AllowUnqualifiedDNSQuery bool `json:"allowUnqualifiedDNSQuery,omitempty"`
+	// Comma separated list of DNS suffixes to use for name resolution.
+	DNSSearchList []string `json:"DNSSearchList,omitempty"`
+	// Name (ID) of the container that we will share with the network stack.
+	NetworkSharedContainerName string `json:"networkSharedContainerName,omitempty"`
+	// name (ID) of the network namespace that will be used for the container.
+	NetworkNamespace string `json:"networkNamespace,omitempty"`
+}
+
+// WindowsHyperV contains information for configuring a container to run with Hyper-V isolation.
+type WindowsHyperV struct {
+	// UtilityVMPath is an optional path to the image used for the Utility VM.
+	UtilityVMPath string `json:"utilityVMPath,omitempty"`
+}
+
+// VM contains information for virtual-machine-based containers.
+type VM struct {
+	// Hypervisor specifies hypervisor-related configuration for virtual-machine-based containers.
+	Hypervisor VMHypervisor `json:"hypervisor,omitempty"`
+	// Kernel specifies kernel-related configuration for virtual-machine-based containers.
+	Kernel VMKernel `json:"kernel"`
+	// Image specifies guest image related configuration for virtual-machine-based containers.
+	Image VMImage `json:"image,omitempty"`
+}
+
+// VMHypervisor contains information about the hypervisor to use for a virtual machine.
+type VMHypervisor struct {
+	// Path is the host path to the hypervisor used to manage the virtual machine.
+	Path string `json:"path"`
+	// Parameters specifies parameters to pass to the hypervisor.
+	Parameters []string `json:"parameters,omitempty"`
+}
+
+// VMKernel contains information about the kernel to use for a virtual machine.
+type VMKernel struct {
+	// Path is the host path to the kernel used to boot the virtual machine.
+	Path string `json:"path"`
+	// Parameters specifies parameters to pass to the kernel.
+	Parameters []string `json:"parameters,omitempty"`
+	// InitRD is the host path to an initial ramdisk to be used by the kernel.
+	InitRD string `json:"initrd,omitempty"`
+}
+
+// VMImage contains information about the virtual machine root image.
+type VMImage struct {
+	// Path is the host path to the root image that the VM kernel would boot into.
+	Path string `json:"path"`
+	// Format is the root image format type (e.g. "qcow2", "raw", "vhd", etc).
+	Format string `json:"format"`
+}
+
+// LinuxSeccomp represents syscall restrictions
+type LinuxSeccomp struct {
+	DefaultAction LinuxSeccompAction `json:"defaultAction"`
+	Architectures []Arch             `json:"architectures,omitempty"`
+	Flags         []LinuxSeccompFlag `json:"flags,omitempty"`
+	Syscalls      []LinuxSyscall     `json:"syscalls,omitempty"`
+}
+
+// Arch used for additional architectures
+type Arch string
+
+// LinuxSeccompFlag is a flag to pass to seccomp(2).
+type LinuxSeccompFlag string
+
+// Additional architectures permitted to be used for system calls
+// By default only the native architecture of the kernel is permitted
+const (
+	ArchX86         Arch = "SCMP_ARCH_X86"
+	ArchX86_64      Arch = "SCMP_ARCH_X86_64"
+	ArchX32         Arch = "SCMP_ARCH_X32"
+	ArchARM         Arch = "SCMP_ARCH_ARM"
+	ArchAARCH64     Arch = "SCMP_ARCH_AARCH64"
+	ArchMIPS        Arch = "SCMP_ARCH_MIPS"
+	ArchMIPS64      Arch = "SCMP_ARCH_MIPS64"
+	ArchMIPS64N32   Arch = "SCMP_ARCH_MIPS64N32"
+	ArchMIPSEL      Arch = "SCMP_ARCH_MIPSEL"
+	ArchMIPSEL64    Arch = "SCMP_ARCH_MIPSEL64"
+	ArchMIPSEL64N32 Arch = "SCMP_ARCH_MIPSEL64N32"
+	ArchPPC         Arch = "SCMP_ARCH_PPC"
+	ArchPPC64       Arch = "SCMP_ARCH_PPC64"
+	ArchPPC64LE     Arch = "SCMP_ARCH_PPC64LE"
+	ArchS390        Arch = "SCMP_ARCH_S390"
+	ArchS390X       Arch = "SCMP_ARCH_S390X"
+	ArchPARISC      Arch = "SCMP_ARCH_PARISC"
+	ArchPARISC64    Arch = "SCMP_ARCH_PARISC64"
+)
+
+// LinuxSeccompAction taken upon Seccomp rule match
+type LinuxSeccompAction string
+
+// Define actions for Seccomp rules
+const (
+	ActKill  LinuxSeccompAction = "SCMP_ACT_KILL"
+	ActTrap  LinuxSeccompAction = "SCMP_ACT_TRAP"
+	ActErrno LinuxSeccompAction = "SCMP_ACT_ERRNO"
+	ActTrace LinuxSeccompAction = "SCMP_ACT_TRACE"
+	ActAllow LinuxSeccompAction = "SCMP_ACT_ALLOW"
+	ActLog   LinuxSeccompAction = "SCMP_ACT_LOG"
+)
+
+// LinuxSeccompOperator used to match syscall arguments in Seccomp
+type LinuxSeccompOperator string
+
+// Define operators for syscall arguments in Seccomp
+const (
+	OpNotEqual     LinuxSeccompOperator = "SCMP_CMP_NE"
+	OpLessThan     LinuxSeccompOperator = "SCMP_CMP_LT"
+	OpLessEqual    LinuxSeccompOperator = "SCMP_CMP_LE"
+	OpEqualTo      LinuxSeccompOperator = "SCMP_CMP_EQ"
+	OpGreaterEqual LinuxSeccompOperator = "SCMP_CMP_GE"
+	OpGreaterThan  LinuxSeccompOperator = "SCMP_CMP_GT"
+	OpMaskedEqual  LinuxSeccompOperator = "SCMP_CMP_MASKED_EQ"
+)
+
+// LinuxSeccompArg used for matching specific syscall arguments in Seccomp
+type LinuxSeccompArg struct {
+	Index    uint                 `json:"index"`
+	Value    uint64               `json:"value"`
+	ValueTwo uint64               `json:"valueTwo,omitempty"`
+	Op       LinuxSeccompOperator `json:"op"`
+}
+
+// LinuxSyscall is used to match a syscall in Seccomp
+type LinuxSyscall struct {
+	Names  []string           `json:"names"`
+	Action LinuxSeccompAction `json:"action"`
+	Args   []LinuxSeccompArg  `json:"args,omitempty"`
+}
+
+// LinuxIntelRdt has container runtime resource constraints for Intel RDT
+// CAT and MBA features which introduced in Linux 4.10 and 4.12 kernel
+type LinuxIntelRdt struct {
+	// The identity for RDT Class of Service
+	ClosID string `json:"closID,omitempty"`
+	// The schema for L3 cache id and capacity bitmask (CBM)
+	// Format: "L3:<cache_id0>=<cbm0>;<cache_id1>=<cbm1>;..."
+	L3CacheSchema string `json:"l3CacheSchema,omitempty"`
+
+	// The schema of memory bandwidth per L3 cache id
+	// Format: "MB:<cache_id0>=bandwidth0;<cache_id1>=bandwidth1;..."
+	// The unit of memory bandwidth is specified in "percentages" by
+	// default, and in "MBps" if MBA Software Controller is enabled.
+	MemBwSchema string `json:"memBwSchema,omitempty"`
+}

vendor/github.com/opencontainers/runtime-spec/specs-go/state.go

@@ -0,0 +1,17 @@
+package specs
+
+// State holds information about the runtime state of the container.
+type State struct {
+	// Version is the version of the specification that is supported.
+	Version string `json:"ociVersion"`
+	// ID is the container ID
+	ID string `json:"id"`
+	// Status is the runtime status of the container.
+	Status string `json:"status"`
+	// Pid is the process ID for the container process.
+	Pid int `json:"pid,omitempty"`
+	// Bundle is the path to the container's bundle directory.
+	Bundle string `json:"bundle"`
+	// Annotations are key values associated with the container.
+	Annotations map[string]string `json:"annotations,omitempty"`
+}

vendor/github.com/opencontainers/runtime-spec/specs-go/version.go

@@ -0,0 +1,18 @@
+package specs
+
+import "fmt"
+
+const (
+	// VersionMajor is for an API incompatible changes
+	VersionMajor = 1
+	// VersionMinor is for functionality in a backwards-compatible manner
+	VersionMinor = 0
+	// VersionPatch is for backwards-compatible bug fixes
+	VersionPatch = 2
+
+	// VersionDev indicates development branch. Releases will be empty string.
+	VersionDev = ""
+)
+
+// Version is the specification version that the package types support.
+var Version = fmt.Sprintf("%d.%d.%d%s", VersionMajor, VersionMinor, VersionPatch, VersionDev)

vendor/github.com/pelletier/go-toml/.dockerignore

@@ -0,0 +1,2 @@
+cmd/tomll/tomll
+cmd/tomljson/tomljson

vendor/github.com/pelletier/go-toml/.gitignore

@@ -0,0 +1,5 @@
+test_program/test_program_bin
+fuzz/
+cmd/tomll/tomll
+cmd/tomljson/tomljson
+cmd/tomltestgen/tomltestgen

vendor/github.com/pelletier/go-toml/CONTRIBUTING.md

@@ -0,0 +1,132 @@
+## Contributing
+
+Thank you for your interest in go-toml! We appreciate you considering
+contributing to go-toml!
+
+The main goal is the project is to provide an easy-to-use TOML
+implementation for Go that gets the job done and gets out of your way –
+dealing with TOML is probably not the central piece of your project.
+
+As the single maintainer of go-toml, time is scarce. All help, big or
+small, is more than welcomed!
+
+### Ask questions
+
+Any question you may have, somebody else might have it too. Always feel
+free to ask them on the [issues tracker][issues-tracker].  We will try to
+answer them as clearly and quickly as possible, time permitting.
+
+Asking questions also helps us identify areas where the documentation needs
+improvement, or new features that weren't envisioned before. Sometimes, a
+seemingly innocent question leads to the fix of a bug. Don't hesitate and
+ask away!
+
+### Improve the documentation
+
+The best way to share your knowledge and experience with go-toml is to
+improve the documentation. Fix a typo, clarify an interface, add an
+example, anything goes!
+
+The documentation is present in the [README][readme] and thorough the
+source code. On release, it gets updated on [pkg.go.dev][pkg.go.dev]. To make a
+change to the documentation, create a pull request with your proposed
+changes. For simple changes like that, the easiest way to go is probably
+the "Fork this project and edit the file" button on Github, displayed at
+the top right of the file. Unless it's a trivial change (for example a
+typo), provide a little bit of context in your pull request description or
+commit message.
+
+### Report a bug
+
+Found a bug! Sorry to hear that :(. Help us and other track them down and
+fix by reporting it. [File a new bug report][bug-report] on the [issues
+tracker][issues-tracker]. The template should provide enough guidance on
+what to include. When in doubt: add more details! By reducing ambiguity and
+providing more information, it decreases back and forth and saves everyone
+time.
+
+### Code changes
+
+Want to contribute a patch? Very happy to hear that!
+
+First, some high-level rules:
+
+* A short proposal with some POC code is better than a lengthy piece of
+  text with no code. Code speaks louder than words.
+* No backward-incompatible patch will be accepted unless discussed.
+  Sometimes it's hard, and Go's lack of versioning by default does not
+  help, but we try not to break people's programs unless we absolutely have
+  to.
+* If you are writing a new feature or extending an existing one, make sure
+  to write some documentation.
+* Bug fixes need to be accompanied with regression tests.
+* New code needs to be tested.
+* Your commit messages need to explain why the change is needed, even if
+  already included in the PR description.
+
+It does sound like a lot, but those best practices are here to save time
+overall and continuously improve the quality of the project, which is
+something everyone benefits from.
+
+#### Get started
+
+The fairly standard code contribution process looks like that:
+
+1. [Fork the project][fork].
+2. Make your changes, commit on any branch you like.
+3. [Open up a pull request][pull-request]
+4. Review, potential ask for changes.
+5. Merge. You're in!
+
+Feel free to ask for help! You can create draft pull requests to gather
+some early feedback!
+
+#### Run the tests
+
+You can run tests for go-toml using Go's test tool: `go test ./...`.
+When creating a pull requests, all tests will be ran on Linux on a few Go
+versions (Travis CI), and on Windows using the latest Go version
+(AppVeyor).
+
+#### Style
+
+Try to look around and follow the same format and structure as the rest of
+the code. We enforce using `go fmt` on the whole code base.
+
+---
+
+### Maintainers-only
+
+#### Merge pull request
+
+Checklist:
+
+* Passing CI.
+* Does not introduce backward-incompatible changes (unless discussed).
+* Has relevant doc changes.
+* Has relevant unit tests.
+
+1. Merge using "squash and merge".
+2. Make sure to edit the commit message to keep all the useful information
+   nice and clean.
+3. Make sure the commit title is clear and contains the PR number (#123).
+
+#### New release
+
+1. Go to [releases][releases]. Click on "X commits to master since this
+   release".
+2. Make note of all the changes. Look for backward incompatible changes,
+   new features, and bug fixes.
+3. Pick the new version using the above and semver.
+4. Create a [new release][new-release].
+5. Follow the same format as [1.1.0][release-110].
+
+[issues-tracker]: https://github.com/pelletier/go-toml/issues
+[bug-report]: https://github.com/pelletier/go-toml/issues/new?template=bug_report.md
+[pkg.go.dev]: https://pkg.go.dev/github.com/pelletier/go-toml
+[readme]: ./README.md
+[fork]: https://help.github.com/articles/fork-a-repo
+[pull-request]: https://help.github.com/en/articles/creating-a-pull-request
+[releases]: https://github.com/pelletier/go-toml/releases
+[new-release]: https://github.com/pelletier/go-toml/releases/new
+[release-110]: https://github.com/pelletier/go-toml/releases/tag/v1.1.0

vendor/github.com/pelletier/go-toml/Dockerfile

@@ -0,0 +1,11 @@
+FROM golang:1.12-alpine3.9 as builder
+WORKDIR /go/src/github.com/pelletier/go-toml
+COPY . .
+ENV CGO_ENABLED=0
+ENV GOOS=linux
+RUN go install ./...
+
+FROM scratch
+COPY --from=builder /go/bin/tomll /usr/bin/tomll
+COPY --from=builder /go/bin/tomljson /usr/bin/tomljson
+COPY --from=builder /go/bin/jsontoml /usr/bin/jsontoml

vendor/github.com/pelletier/go-toml/LICENSE

@@ -0,0 +1,247 @@
+The bulk of github.com/pelletier/go-toml is distributed under the MIT license
+(see below), with the exception of localtime.go and localtime.test.go.
+Those two files have been copied over from Google's civil library at revision
+ed46f5086358513cf8c25f8e3f022cb838a49d66, and are distributed under the Apache
+2.0 license (see below).
+
+
+github.com/pelletier/go-toml:
+
+
+The MIT License (MIT)
+
+Copyright (c) 2013 - 2021 Thomas Pelletier, Eric Anderton
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+
+localtime.go, localtime_test.go:
+
+Originals:
+    https://raw.githubusercontent.com/googleapis/google-cloud-go/ed46f5086358513cf8c25f8e3f022cb838a49d66/civil/civil.go
+    https://raw.githubusercontent.com/googleapis/google-cloud-go/ed46f5086358513cf8c25f8e3f022cb838a49d66/civil/civil_test.go
+Changes:
+    * Renamed files from civil* to localtime*.
+    * Package changed from civil to toml.
+    * 'Local' prefix added to all structs.
+License:
+    https://raw.githubusercontent.com/googleapis/google-cloud-go/ed46f5086358513cf8c25f8e3f022cb838a49d66/LICENSE
+
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
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+      direction or management of such entity, whether by contract or
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+      "You" (or "Your") shall mean an individual or Legal Entity
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+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
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+   7. Disclaimer of Warranty. Unless required by applicable law or
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+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+
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+
+      To apply the Apache License to your work, attach the following
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+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/pelletier/go-toml/Makefile

@@ -0,0 +1,29 @@
+export CGO_ENABLED=0
+go := go
+go.goos ?= $(shell echo `go version`|cut -f4 -d ' '|cut -d '/' -f1)
+go.goarch ?= $(shell echo `go version`|cut -f4 -d ' '|cut -d '/' -f2)
+
+out.tools := tomll tomljson jsontoml
+out.dist := $(out.tools:=_$(go.goos)_$(go.goarch).tar.xz)
+sources := $(wildcard **/*.go)
+
+
+.PHONY:
+tools: $(out.tools)
+
+$(out.tools): $(sources)
+	GOOS=$(go.goos) GOARCH=$(go.goarch) $(go) build ./cmd/$@
+
+.PHONY:
+dist: $(out.dist)
+
+$(out.dist):%_$(go.goos)_$(go.goarch).tar.xz: %
+	if [ "$(go.goos)" = "windows" ]; then \
+		tar -cJf $@ $^.exe; \
+	else \
+		tar -cJf $@ $^; \
+	fi
+
+.PHONY:
+clean:
+	rm -rf $(out.tools) $(out.dist)

vendor/github.com/pelletier/go-toml/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,5 @@
+**Issue:** add link to pelletier/go-toml issue here
+
+Explanation of what this pull request does.
+
+More detailed description of the decisions being made and the reasons why (if the patch is non-trivial).

vendor/github.com/pelletier/go-toml/README.md

@@ -0,0 +1,176 @@
+# go-toml
+
+Go library for the [TOML](https://toml.io/) format.
+
+This library supports TOML version
+[v1.0.0-rc.3](https://toml.io/en/v1.0.0-rc.3)
+
+[![Go Reference](https://pkg.go.dev/badge/github.com/pelletier/go-toml.svg)](https://pkg.go.dev/github.com/pelletier/go-toml)
+[![license](https://img.shields.io/github/license/pelletier/go-toml.svg)](https://github.com/pelletier/go-toml/blob/master/LICENSE)
+[![Build Status](https://dev.azure.com/pelletierthomas/go-toml-ci/_apis/build/status/pelletier.go-toml?branchName=master)](https://dev.azure.com/pelletierthomas/go-toml-ci/_build/latest?definitionId=1&branchName=master)
+[![codecov](https://codecov.io/gh/pelletier/go-toml/branch/master/graph/badge.svg)](https://codecov.io/gh/pelletier/go-toml)
+[![Go Report Card](https://goreportcard.com/badge/github.com/pelletier/go-toml)](https://goreportcard.com/report/github.com/pelletier/go-toml)
+[![FOSSA Status](https://app.fossa.io/api/projects/git%2Bgithub.com%2Fpelletier%2Fgo-toml.svg?type=shield)](https://app.fossa.io/projects/git%2Bgithub.com%2Fpelletier%2Fgo-toml?ref=badge_shield)
+
+
+## Development status
+
+**ℹ️ Consider go-toml v2!**
+
+The next version of go-toml is in [active development][v2-dev], and
+[nearing completion][v2-map].
+
+Though technically in beta, v2 is already more tested, [fixes bugs][v1-bugs],
+and [much faster][v2-bench]. If you only need reading and writing TOML documents
+(majority of cases), those features are implemented and the API unlikely to
+change.
+
+The remaining features (Document structure editing and tooling) will be added
+shortly. While pull-requests are welcome on v1, no active development is
+expected on it. When v2.0.0 is released, v1 will be deprecated.
+
+👉 [go-toml v2][v2]
+
+[v2]: https://github.com/pelletier/go-toml/tree/v2
+[v2-map]: https://github.com/pelletier/go-toml/discussions/506
+[v2-dev]: https://github.com/pelletier/go-toml/tree/v2
+[v1-bugs]: https://github.com/pelletier/go-toml/issues?q=is%3Aissue+is%3Aopen+label%3Av2-fixed
+[v2-bench]: https://github.com/pelletier/go-toml/tree/v2#benchmarks
+
+## Features
+
+Go-toml provides the following features for using data parsed from TOML documents:
+
+* Load TOML documents from files and string data
+* Easily navigate TOML structure using Tree
+* Marshaling and unmarshaling to and from data structures
+* Line & column position data for all parsed elements
+* [Query support similar to JSON-Path](query/)
+* Syntax errors contain line and column numbers
+
+## Import
+
+```go
+import "github.com/pelletier/go-toml"
+```
+
+## Usage example
+
+Read a TOML document:
+
+```go
+config, _ := toml.Load(`
+[postgres]
+user = "pelletier"
+password = "mypassword"`)
+// retrieve data directly
+user := config.Get("postgres.user").(string)
+
+// or using an intermediate object
+postgresConfig := config.Get("postgres").(*toml.Tree)
+password := postgresConfig.Get("password").(string)
+```
+
+Or use Unmarshal:
+
+```go
+type Postgres struct {
+    User     string
+    Password string
+}
+type Config struct {
+    Postgres Postgres
+}
+
+doc := []byte(`
+[Postgres]
+User = "pelletier"
+Password = "mypassword"`)
+
+config := Config{}
+toml.Unmarshal(doc, &config)
+fmt.Println("user=", config.Postgres.User)
+```
+
+Or use a query:
+
+```go
+// use a query to gather elements without walking the tree
+q, _ := query.Compile("$..[user,password]")
+results := q.Execute(config)
+for ii, item := range results.Values() {
+    fmt.Printf("Query result %d: %v\n", ii, item)
+}
+```
+
+## Documentation
+
+The documentation and additional examples are available at
+[pkg.go.dev](https://pkg.go.dev/github.com/pelletier/go-toml).
+
+## Tools
+
+Go-toml provides three handy command line tools:
+
+* `tomll`: Reads TOML files and lints them.
+
+    ```
+    go install github.com/pelletier/go-toml/cmd/tomll
+    tomll --help
+    ```
+* `tomljson`: Reads a TOML file and outputs its JSON representation.
+
+    ```
+    go install github.com/pelletier/go-toml/cmd/tomljson
+    tomljson --help
+    ```
+
+ * `jsontoml`: Reads a JSON file and outputs a TOML representation.
+
+    ```
+    go install github.com/pelletier/go-toml/cmd/jsontoml
+    jsontoml --help
+    ```
+
+### Docker image
+
+Those tools are also available as a Docker image from
+[dockerhub](https://hub.docker.com/r/pelletier/go-toml). For example, to
+use `tomljson`:
+
+```
+docker run -v $PWD:/workdir pelletier/go-toml tomljson /workdir/example.toml
+```
+
+Only master (`latest`) and tagged versions are published to dockerhub. You
+can build your own image as usual:
+
+```
+docker build -t go-toml .
+```
+
+## Contribute
+
+Feel free to report bugs and patches using GitHub's pull requests system on
+[pelletier/go-toml](https://github.com/pelletier/go-toml). Any feedback would be
+much appreciated!
+
+### Run tests
+
+`go test ./...`
+
+### Fuzzing
+
+The script `./fuzz.sh` is available to
+run [go-fuzz](https://github.com/dvyukov/go-fuzz) on go-toml.
+
+## Versioning
+
+Go-toml follows [Semantic Versioning](http://semver.org/). The supported version
+of [TOML](https://github.com/toml-lang/toml) is indicated at the beginning of
+this document. The last two major versions of Go are supported
+(see [Go Release Policy](https://golang.org/doc/devel/release.html#policy)).
+
+## License
+
+The MIT License (MIT) + Apache 2.0. Read [LICENSE](LICENSE).

vendor/github.com/pelletier/go-toml/azure-pipelines.yml

@@ -0,0 +1,188 @@
+trigger:
+- master
+
+stages:
+- stage: run_checks
+  displayName: "Check"
+  dependsOn: []
+  jobs:
+  - job: fmt
+    displayName: "fmt"
+    pool:
+      vmImage: ubuntu-latest
+    steps:
+    - task: GoTool@0
+      displayName: "Install Go 1.16"
+      inputs:
+        version: "1.16"
+    - task: Go@0
+      displayName: "go fmt ./..."
+      inputs:
+        command: 'custom'
+        customCommand: 'fmt'
+        arguments: './...'
+  - job: coverage
+    displayName: "coverage"
+    pool:
+      vmImage: ubuntu-latest
+    steps:
+    - task: GoTool@0
+      displayName: "Install Go 1.16"
+      inputs:
+        version: "1.16"
+    - task: Go@0
+      displayName: "Generate coverage"
+      inputs:
+        command: 'test'
+        arguments: "-race -coverprofile=coverage.txt -covermode=atomic"
+    - task: Bash@3
+      inputs:
+        targetType: 'inline'
+        script: 'bash <(curl -s https://codecov.io/bash) -t ${CODECOV_TOKEN}'
+      env:
+        CODECOV_TOKEN: $(CODECOV_TOKEN)
+  - job: benchmark
+    displayName: "benchmark"
+    pool:
+      vmImage: ubuntu-latest
+    steps:
+    - task: GoTool@0
+      displayName: "Install Go 1.16"
+      inputs:
+        version: "1.16"
+    - script: echo "##vso[task.setvariable variable=PATH]${PATH}:/home/vsts/go/bin/"
+    - task: Bash@3
+      inputs:
+        filePath: './benchmark.sh'
+        arguments: "master $(Build.Repository.Uri)"
+
+  - job: go_unit_tests
+    displayName: "unit tests"
+    strategy:
+      matrix:
+        linux 1.16:
+          goVersion: '1.16'
+          imageName: 'ubuntu-latest'
+        mac 1.16:
+          goVersion: '1.16'
+          imageName: 'macOS-latest'
+        windows 1.16:
+          goVersion: '1.16'
+          imageName: 'windows-latest'
+        linux 1.15:
+          goVersion: '1.15'
+          imageName: 'ubuntu-latest'
+        mac 1.15:
+          goVersion: '1.15'
+          imageName: 'macOS-latest'
+        windows 1.15:
+          goVersion: '1.15'
+          imageName: 'windows-latest'
+    pool:
+      vmImage: $(imageName)
+    steps:
+    - task: GoTool@0
+      displayName: "Install Go $(goVersion)"
+      inputs:
+        version: $(goVersion)
+    - task: Go@0
+      displayName: "go test ./..."
+      inputs:
+        command: 'test'
+        arguments: './...'
+- stage: build_binaries
+  displayName: "Build binaries"
+  dependsOn: run_checks
+  jobs:
+  - job: build_binary
+    displayName: "Build binary"
+    strategy:
+      matrix:
+        linux_amd64:
+          GOOS: linux
+          GOARCH: amd64
+        darwin_amd64:
+          GOOS: darwin
+          GOARCH: amd64
+        windows_amd64:
+          GOOS: windows
+          GOARCH: amd64
+    pool:
+      vmImage: ubuntu-latest
+    steps:
+    - task: GoTool@0
+      displayName: "Install Go"
+      inputs:
+        version: 1.16
+    - task: Bash@3
+      inputs:
+        targetType: inline
+        script: "make dist"
+      env:
+        go.goos: $(GOOS)
+        go.goarch: $(GOARCH)
+    - task: CopyFiles@2
+      inputs:
+        sourceFolder: '$(Build.SourcesDirectory)'
+        contents: '*.tar.xz'
+        TargetFolder: '$(Build.ArtifactStagingDirectory)'
+    - task: PublishBuildArtifacts@1
+      inputs:
+        pathtoPublish: '$(Build.ArtifactStagingDirectory)'
+        artifactName: binaries
+- stage: build_binaries_manifest
+  displayName: "Build binaries manifest"
+  dependsOn: build_binaries
+  jobs:
+  - job: build_manifest
+    displayName: "Build binaries manifest"
+    steps:
+      - task: DownloadBuildArtifacts@0
+        inputs:
+          buildType: 'current'
+          downloadType: 'single'
+          artifactName: 'binaries'
+          downloadPath: '$(Build.SourcesDirectory)'
+      - task: Bash@3
+        inputs:
+          targetType: inline
+          script: "cd binaries && sha256sum --binary *.tar.xz | tee $(Build.ArtifactStagingDirectory)/sha256sums.txt"
+      - task: PublishBuildArtifacts@1
+        inputs:
+          pathtoPublish: '$(Build.ArtifactStagingDirectory)'
+          artifactName: manifest
+
+- stage: build_docker_image
+  displayName: "Build Docker image"
+  dependsOn: run_checks
+  jobs:
+  - job: build
+    displayName: "Build"
+    pool:
+      vmImage: ubuntu-latest
+    steps:
+    - task: Docker@2
+      inputs:
+        command: 'build'
+        Dockerfile: 'Dockerfile'
+        buildContext: '.'
+        addPipelineData: false
+
+- stage: publish_docker_image
+  displayName: "Publish Docker image"
+  dependsOn: build_docker_image
+  condition: and(succeeded(), eq(variables['Build.SourceBranchName'], 'master'))
+  jobs:
+  - job: publish
+    displayName: "Publish"
+    pool:
+      vmImage: ubuntu-latest
+    steps:
+    - task: Docker@2
+      inputs:
+        containerRegistry: 'DockerHub'
+        repository: 'pelletier/go-toml'
+        command: 'buildAndPush'
+        Dockerfile: 'Dockerfile'
+        buildContext: '.'
+        tags: 'latest'

vendor/github.com/pelletier/go-toml/benchmark.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+
+set -ex
+
+reference_ref=${1:-master}
+reference_git=${2:-.}
+
+if ! `hash benchstat 2>/dev/null`; then
+    echo "Installing benchstat"
+    go get golang.org/x/perf/cmd/benchstat
+fi
+
+tempdir=`mktemp -d /tmp/go-toml-benchmark-XXXXXX`
+ref_tempdir="${tempdir}/ref"
+ref_benchmark="${ref_tempdir}/benchmark-`echo -n ${reference_ref}|tr -s '/' '-'`.txt"
+local_benchmark="`pwd`/benchmark-local.txt"
+
+echo "=== ${reference_ref} (${ref_tempdir})"
+git clone ${reference_git} ${ref_tempdir} >/dev/null 2>/dev/null
+pushd ${ref_tempdir} >/dev/null
+git checkout ${reference_ref} >/dev/null 2>/dev/null
+go test -bench=. -benchmem | tee ${ref_benchmark}
+cd benchmark
+go test -bench=. -benchmem | tee -a ${ref_benchmark}
+popd >/dev/null
+
+echo ""
+echo "=== local"
+go test -bench=. -benchmem  | tee ${local_benchmark}
+cd benchmark
+go test -bench=. -benchmem | tee -a ${local_benchmark}
+
+echo ""
+echo "=== diff"
+benchstat -delta-test=none ${ref_benchmark} ${local_benchmark}

vendor/github.com/pelletier/go-toml/doc.go

@@ -0,0 +1,23 @@
+// Package toml is a TOML parser and manipulation library.
+//
+// This version supports the specification as described in
+// https://github.com/toml-lang/toml/blob/master/versions/en/toml-v0.5.0.md
+//
+// Marshaling
+//
+// Go-toml can marshal and unmarshal TOML documents from and to data
+// structures.
+//
+// TOML document as a tree
+//
+// Go-toml can operate on a TOML document as a tree. Use one of the Load*
+// functions to parse TOML data and obtain a Tree instance, then one of its
+// methods to manipulate the tree.
+//
+// JSONPath-like queries
+//
+// The package github.com/pelletier/go-toml/query implements a system
+// similar to JSONPath to quickly retrieve elements of a TOML document using a
+// single expression. See the package documentation for more information.
+//
+package toml

vendor/github.com/pelletier/go-toml/example-crlf.toml

@@ -0,0 +1,30 @@
+# This is a TOML document. Boom.
+
+title = "TOML Example"
+
+[owner]
+name = "Tom Preston-Werner"
+organization = "GitHub"
+bio = "GitHub Cofounder & CEO\nLikes tater tots and beer."
+dob = 1979-05-27T07:32:00Z # First class dates? Why not?
+
+[database]
+server = "192.168.1.1"
+ports = [ 8001, 8001, 8002 ]
+connection_max = 5000
+enabled = true
+
+[servers]
+
+  # You can indent as you please. Tabs or spaces. TOML don't care.
+  [servers.alpha]
+  ip = "10.0.0.1"
+  dc = "eqdc10"
+
+  [servers.beta]
+  ip = "10.0.0.2"
+  dc = "eqdc10"
+
+[clients]
+data = [ ["gamma", "delta"], [1, 2] ] # just an update to make sure parsers support it
+score = 4e-08 # to make sure leading zeroes in exponent parts of floats are supported