mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-23 00:38:26 +00:00
116 lines
2.9 KiB
Go
116 lines
2.9 KiB
Go
/*
|
|
# 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"
|
|
"path/filepath"
|
|
"strings"
|
|
)
|
|
|
|
const (
|
|
specFileName = "config.json"
|
|
)
|
|
|
|
// GetBundleDir returns the bundle directory or default depending on the
|
|
// supplied command line arguments.
|
|
func GetBundleDir(args []string) (string, error) {
|
|
bundleDir, err := GetBundleDirFromArgs(args)
|
|
if err != nil {
|
|
return "", fmt.Errorf("error getting bundle dir from args: %v", err)
|
|
}
|
|
|
|
return bundleDir, nil
|
|
}
|
|
|
|
// GetBundleDirFromArgs 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 GetBundleDirFromArgs(args []string) (string, error) {
|
|
var bundleDir string
|
|
|
|
for i := 0; i < len(args); i++ {
|
|
param := args[i]
|
|
|
|
parts := strings.SplitN(param, "=", 2)
|
|
if !IsBundleFlag(parts[0]) {
|
|
continue
|
|
}
|
|
|
|
// The flag has the format --bundle=/path
|
|
if len(parts) == 2 {
|
|
bundleDir = parts[1]
|
|
continue
|
|
}
|
|
|
|
// The flag has the format --bundle /path
|
|
if i+1 < len(args) {
|
|
bundleDir = args[i+1]
|
|
i++
|
|
continue
|
|
}
|
|
|
|
// --bundle / -b was the last element of args
|
|
return "", fmt.Errorf("bundle option requires an argument")
|
|
}
|
|
|
|
return bundleDir, nil
|
|
}
|
|
|
|
// GetSpecFilePath returns the expected path to the OCI specification file for the given
|
|
// bundle directory.
|
|
func GetSpecFilePath(bundleDir string) string {
|
|
specFilePath := filepath.Join(bundleDir, specFileName)
|
|
return specFilePath
|
|
}
|
|
|
|
// IsBundleFlag is a helper function that checks wither the specified argument represents
|
|
// a bundle flag (--bundle or -b)
|
|
func IsBundleFlag(arg string) bool {
|
|
if !strings.HasPrefix(arg, "-") {
|
|
return false
|
|
}
|
|
|
|
trimmed := strings.TrimLeft(arg, "-")
|
|
return trimmed == "b" || trimmed == "bundle"
|
|
}
|
|
|
|
// HasCreateSubcommand checks the supplied arguments for a 'create' subcommand
|
|
func HasCreateSubcommand(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" {
|
|
return true
|
|
}
|
|
|
|
previousWasBundle = false
|
|
}
|
|
|
|
return false
|
|
}
|