blob: c3de65f546a6787aa8cbd9720c8efcbba932d3a7 [file] [log] [blame]
// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
// editor invokes an interactive editor on a temporary file containing
// initial, blocks until the editor exits, and returns the (possibly
// edited) contents of the temporary file. It follows the conventions
// of git for selecting and invoking the editor (see git-var(1)).
func editor(initial string) string {
// Query the git editor command.
gitEditor := trim(cmdOutput("git", "var", "GIT_EDITOR"))
// Create temporary file.
temp, err := ioutil.TempFile("", "git-codereview")
if err != nil {
dief("creating temp file: %v", err)
tempName := temp.Name()
defer os.Remove(tempName)
if _, err := io.WriteString(temp, initial); err != nil {
dief("%v", err)
if err := temp.Close(); err != nil {
dief("%v", err)
// Invoke the editor. See git's prepare_shell_cmd.
cmd := exec.Command("sh", "-c", gitEditor+" \"$@\"", gitEditor, tempName)
cmd.Stdin, cmd.Stdout, cmd.Stderr = os.Stdin, os.Stdout, os.Stderr
if err := cmd.Run(); err != nil {
dief("editor exited with: %v", err)
// Read the edited file.
b, err := ioutil.ReadFile(tempName)
if err != nil {
dief("%v", err)
return string(b)