mirror of
https://github.com/golang/go
synced 2024-11-25 07:37:57 -07:00
89 lines
2.0 KiB
Go
89 lines
2.0 KiB
Go
// Copyright 2011 The Go Authors. 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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package main
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import (
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"bytes"
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"exec"
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"io"
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"log"
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"os"
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"strings"
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)
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// run is a simple wrapper for exec.Run/Close
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func run(envv []string, dir string, argv ...string) os.Error {
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if *verbose {
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log.Println("run", argv)
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}
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argv = useBash(argv)
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bin, err := lookPath(argv[0])
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if err != nil {
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return err
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}
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p, err := exec.Run(bin, argv, envv, dir,
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exec.DevNull, exec.DevNull, exec.PassThrough)
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if err != nil {
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return err
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}
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return p.Close()
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}
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// runLog runs a process and returns the combined stdout/stderr,
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// as well as writing it to logfile (if specified).
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func runLog(envv []string, logfile, dir string, argv ...string) (output string, exitStatus int, err os.Error) {
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if *verbose {
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log.Println("runLog", argv)
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}
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argv = useBash(argv)
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bin, err := lookPath(argv[0])
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if err != nil {
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return
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}
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p, err := exec.Run(bin, argv, envv, dir,
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exec.DevNull, exec.Pipe, exec.MergeWithStdout)
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if err != nil {
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return
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}
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defer p.Close()
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b := new(bytes.Buffer)
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var w io.Writer = b
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if logfile != "" {
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f, err := os.OpenFile(logfile, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0666)
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if err != nil {
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return
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}
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defer f.Close()
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w = io.MultiWriter(f, b)
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}
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_, err = io.Copy(w, p.Stdout)
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if err != nil {
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return
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}
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wait, err := p.Wait(0)
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if err != nil {
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return
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}
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return b.String(), wait.WaitStatus.ExitStatus(), nil
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}
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// lookPath looks for cmd in $PATH if cmd does not begin with / or ./ or ../.
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func lookPath(cmd string) (string, os.Error) {
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if strings.HasPrefix(cmd, "/") || strings.HasPrefix(cmd, "./") || strings.HasPrefix(cmd, "../") {
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return cmd, nil
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}
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return exec.LookPath(cmd)
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}
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// useBash prefixes a list of args with 'bash' if the first argument
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// is a bash script.
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func useBash(argv []string) []string {
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// TODO(brainman): choose a more reliable heuristic here.
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if strings.HasSuffix(argv[0], ".bash") {
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argv = append([]string{"bash"}, argv...)
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}
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return argv
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}
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