58 lines
1.2 KiB
Go
58 lines
1.2 KiB
Go
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package xexec
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import (
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"errors"
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"io/fs"
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"os"
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"path/filepath"
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"strings"
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)
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// findExecutable is from package exec
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func findExecutable(file string) error {
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d, err := os.Stat(file)
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if err != nil {
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return err
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}
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if m := d.Mode(); !m.IsDir() && m&0111 != 0 {
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return nil
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}
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return fs.ErrPermission
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}
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// SearchPath searches for all executables that have prefix in their names in
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// the directories named by the PATH environment variable.
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func SearchPath(prefix string) ([]string, error) {
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var matches []string
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envPath := os.Getenv("PATH")
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dirSet := make(map[string]struct{})
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for _, dir := range filepath.SplitList(envPath) {
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if dir == "" {
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// From exec package:
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// Unix shell semantics: path element "" means "."
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dir = "."
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}
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if _, ok := dirSet[dir]; ok {
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continue
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}
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dirSet[dir] = struct{}{}
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files, err := os.ReadDir(dir)
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if err != nil {
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if errors.Is(err, fs.ErrNotExist) {
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continue
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}
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return nil, err
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}
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for _, f := range files {
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if strings.HasPrefix(f.Name(), prefix) {
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match := filepath.Join(dir, f.Name())
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if err := findExecutable(match); err == nil {
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matches = append(matches, match)
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}
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}
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}
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}
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return matches, nil
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}
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