mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-24 13:05:17 +00:00
82 lines
2.1 KiB
Go
82 lines
2.1 KiB
Go
/*
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# Copyright (c) 2021, NVIDIA CORPORATION. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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*/
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package modify
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import (
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"fmt"
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"path/filepath"
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"strings"
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"github.com/opencontainers/runtime-spec/specs-go"
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log "github.com/sirupsen/logrus"
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"gitlab.com/nvidia/cloud-native/container-toolkit/pkg/discover"
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"gitlab.com/nvidia/cloud-native/container-toolkit/pkg/oci"
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)
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// Hook is an alias to discover.Hook that allows for addition of a Modify method
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type Hook struct {
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logger *log.Logger
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discover.Hook
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bundleDir string
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}
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var _ Modifier = (*Hook)(nil)
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// Modify applies the modifications required by a Hook to the specified OCI specification
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func (h Hook) Modify(spec oci.Spec) error {
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return spec.Modify(h.specModifier)
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}
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func (h Hook) specModifier(spec *specs.Spec) error {
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if spec.Hooks == nil {
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h.logger.Debugf("Initializing spec.Hooks")
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spec.Hooks = &specs.Hooks{}
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}
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// TODO: This is duplicated in the hook specification
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const rootPattern = "@Root.Path@"
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rootPath := spec.Root.Path
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if !filepath.IsAbs(rootPath) {
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rootPath = filepath.Join(h.bundleDir, rootPath)
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}
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var args []string
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for _, a := range h.Args {
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if strings.Contains(a, rootPattern) {
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args = append(args, strings.ReplaceAll(a, rootPattern, rootPath))
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continue
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}
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args = append(args, a)
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}
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specHook := specs.Hook{
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Path: h.Path,
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Args: args,
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}
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h.logger.Infof("Adding %v hook %+v", h.HookName, specHook)
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switch h.HookName {
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case "create-container":
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spec.Hooks.CreateContainer = append(spec.Hooks.CreateContainer, specHook)
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default:
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return fmt.Errorf("unexpected hook name: %v", h.HookName)
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}
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return nil
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}
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