mirror of https://github.com/smcquay/wch/
57 lines
1.1 KiB
Go
57 lines
1.1 KiB
Go
package main
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import (
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"flag"
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"fmt"
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"os"
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"path/filepath"
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)
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var all = flag.Bool("a", false, "list all instances of executables found (instead of just the first one of each).")
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var silent = flag.Bool("s", false, "No output, just return 0 if all of the executables are found, or 1 if some were not found.")
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func main() {
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flag.Parse()
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paths := filepath.SplitList(os.Getenv("PATH"))
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rc := 0
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for _, cmd := range flag.Args() {
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found := false
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for _, dir := range paths {
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path := filepath.Join(dir, cmd)
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if err := findExecutable(path); err == nil {
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found = true
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if !*silent {
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fmt.Println(path)
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}
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if !*all {
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break
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}
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}
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}
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if !found {
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if !*silent {
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fmt.Printf("%v not found\n", cmd)
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}
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rc++
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}
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}
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if rc > 0 {
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rc = 1
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}
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os.Exit(rc)
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}
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// findExecutable is from the stdlib: https://golang.org/src/os/exec/lp_unix.go?s=458:647#L19
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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 os.ErrPermission
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}
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