mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2025-05-29 09:43:42 +00:00
94 lines
2.8 KiB
Go
94 lines
2.8 KiB
Go
/**
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# Copyright (c) 2022, 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 tegra
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import (
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"fmt"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/discover"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/logger"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/lookup"
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)
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type symlinkHook struct {
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discover.None
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logger logger.Interface
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hookCreator discover.HookCreator
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targets []string
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// The following can be overridden for testing
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symlinkChainLocator lookup.Locator
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resolveSymlink func(string) (string, error)
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}
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// createCSVSymlinkHooks creates a discoverer for a hook that creates required symlinks in the container
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func (o tegraOptions) createCSVSymlinkHooks(targets []string) discover.Discover {
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return symlinkHook{
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logger: o.logger,
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hookCreator: o.hookCreator,
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targets: targets,
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symlinkChainLocator: o.symlinkChainLocator,
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resolveSymlink: o.resolveSymlink,
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}
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}
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// Hooks returns a hook to create the symlinks from the required CSV files
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func (d symlinkHook) Hooks() ([]discover.Hook, error) {
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return d.hookCreator.Create("create-symlinks", d.getCSVFileSymlinks()...).Hooks()
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}
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// getSymlinkCandidates returns a list of symlinks that are candidates for being created.
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func (d symlinkHook) getSymlinkCandidates() []string {
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var candidates []string
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for _, target := range d.targets {
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reslovedSymlinkChain, err := d.symlinkChainLocator.Locate(target)
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if err != nil {
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d.logger.Warningf("Failed to locate symlink %v", target)
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continue
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}
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candidates = append(candidates, reslovedSymlinkChain...)
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}
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return candidates
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}
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func (d symlinkHook) getCSVFileSymlinks() []string {
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var links []string
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created := make(map[string]bool)
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// candidates is a list of absolute paths to symlinks in a chain, or the final target of the chain.
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for _, candidate := range d.getSymlinkCandidates() {
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target, err := d.resolveSymlink(candidate)
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if err != nil {
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d.logger.Debugf("Skipping invalid link: %v", err)
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continue
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} else if target == candidate {
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d.logger.Debugf("%v is not a symlink", candidate)
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continue
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}
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link := fmt.Sprintf("%v::%v", target, candidate)
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if created[link] {
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d.logger.Debugf("skipping duplicate link: %v", link)
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continue
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}
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created[link] = true
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links = append(links, link)
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}
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return links
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}
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