mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-25 13:35:00 +00:00
70 lines
1.8 KiB
Go
70 lines
1.8 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 lookup
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import (
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"os"
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"path"
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"path/filepath"
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"strings"
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)
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const (
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envPath = "PATH"
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)
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var (
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defaultPATH = []string{"/usr/local/sbin", "/usr/local/bin", "/usr/sbin", "/usr/bin", "/sbin", "/bin"}
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)
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// GetPaths returns a list of paths for a specified root. These are constructed from the
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// PATH environment variable, a default path list, and the supplied root.
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func GetPaths(root string) []string {
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dirs := filepath.SplitList(os.Getenv(envPath))
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inDirs := make(map[string]bool)
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for _, d := range dirs {
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inDirs[d] = true
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}
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// directories from the environment have higher precedence
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for _, d := range defaultPATH {
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if inDirs[d] {
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// We don't add paths that are already included
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continue
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}
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dirs = append(dirs, d)
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}
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if root != "" && root != "/" {
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rootDirs := []string{}
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for _, dir := range dirs {
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rootDirs = append(rootDirs, path.Join(root, dir))
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}
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// directories with the root prefix have higher precedence
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dirs = append(rootDirs, dirs...)
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}
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return dirs
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}
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// GetPath returns a colon-separated path value that can be used to set the PATH
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// environment variable
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func GetPath(root string) string {
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return strings.Join(GetPaths(root), ":")
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}
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