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45 lines
888 B
Go
45 lines
888 B
Go
// Copyright 2014 <chaishushan{AT}gmail.com>. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build ingore
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// Lookpath is a simple which.
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package main
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import (
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"fmt"
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"os"
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"os/exec"
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"strings"
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)
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func main() {
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if len(os.Args) < 2 {
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fmt.Printf(`Usage: lookpath COMMAND [...]
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Write the full path of COMMAND(s) to standard output.
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Report bugs to <chaishushan@gmail.com>.
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`)
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os.Exit(0)
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}
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for i := 1; i < len(os.Args); i++ {
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path, err := exec.LookPath(os.Args[i])
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if err != nil {
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fmt.Printf("lookpath: no %s in (%v)\n", os.Args[i], GetEnv("PATH"))
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os.Exit(0)
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}
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fmt.Println(path)
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}
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}
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func GetEnv(key string) string {
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key = strings.ToUpper(key) + "="
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for _, env := range os.Environ() {
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if strings.HasPrefix(strings.ToUpper(env), key) {
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return env[len(key):]
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}
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}
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return ""
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}
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