118 lines
3.6 KiB
Go
118 lines
3.6 KiB
Go
/*
|
|
Copyright 2015 Google Inc. All rights reserved.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package input
|
|
|
|
import (
|
|
"bufio"
|
|
"bytes"
|
|
"fmt"
|
|
"github.com/google/git-appraise/repository"
|
|
"io/ioutil"
|
|
"os"
|
|
"os/exec"
|
|
)
|
|
|
|
// LaunchEditor launches the default editor configured for the given repo. This
|
|
// method blocks until the editor command has returned.
|
|
//
|
|
// The specified filename should be a temporary file and provided as a relative path
|
|
// from the repo (e.g. "FILENAME" will be converted to ".git/FILENAME"). This file
|
|
// will be deleted after the editor is closed and its contents have been read.
|
|
//
|
|
// This method returns the text that was read from the temporary file, or
|
|
// an error if any step in the process failed.
|
|
func LaunchEditor(repo repository.Repo, fileName string) (string, error) {
|
|
editor, err := repo.GetCoreEditor()
|
|
if err != nil {
|
|
return "", fmt.Errorf("Unable to detect default git editor: %v\n", err)
|
|
}
|
|
|
|
path := fmt.Sprintf("%s/.git/%s", repo.GetPath(), fileName)
|
|
|
|
cmd, err := startInlineCommand(editor, path)
|
|
if err != nil {
|
|
// Running the editor directly did not work. This might mean that
|
|
// the editor string is not a path to an executable, but rather
|
|
// a shell command (e.g. "emacsclient --tty"). As such, we'll try
|
|
// to run the command through bash, and if that fails, try with sh
|
|
args := []string{"-c", fmt.Sprintf("%s %q", editor, path)}
|
|
cmd, err = startInlineCommand("bash", args...)
|
|
if err != nil {
|
|
cmd, err = startInlineCommand("sh", args...)
|
|
}
|
|
}
|
|
if err != nil {
|
|
return "", fmt.Errorf("Unable to start editor: %v\n", err)
|
|
}
|
|
|
|
if err := cmd.Wait(); err != nil {
|
|
return "", fmt.Errorf("Editing finished with error: %v\n", err)
|
|
}
|
|
|
|
output, err := ioutil.ReadFile(path)
|
|
if err != nil {
|
|
os.Remove(path)
|
|
return "", fmt.Errorf("Error reading edited file: %v\n", err)
|
|
}
|
|
os.Remove(path)
|
|
return string(output), err
|
|
}
|
|
|
|
// FromFile loads and returns the contents of a given file. If - is passed
|
|
// through, much like git, it will read from stdin. This can be piped data,
|
|
// unless there is a tty in which case the user will be prompted to enter a
|
|
// message.
|
|
func FromFile(fileName string) (string, error) {
|
|
if fileName == "-" {
|
|
stat, err := os.Stdin.Stat()
|
|
if err != nil {
|
|
return "", fmt.Errorf("Error reading from stdin: %v\n", err)
|
|
}
|
|
if (stat.Mode() & os.ModeCharDevice) == 0 {
|
|
// There is no tty. This will allow us to read piped data instead.
|
|
output, err := ioutil.ReadAll(os.Stdin)
|
|
if err != nil {
|
|
return "", fmt.Errorf("Error reading from stdin: %v\n", err)
|
|
}
|
|
return string(output), err
|
|
}
|
|
|
|
fmt.Printf("(reading comment from standard input)\n")
|
|
var output bytes.Buffer
|
|
s := bufio.NewScanner(os.Stdin)
|
|
for s.Scan() {
|
|
output.Write(s.Bytes())
|
|
output.WriteRune('\n')
|
|
}
|
|
return output.String(), nil
|
|
}
|
|
|
|
output, err := ioutil.ReadFile(fileName)
|
|
if err != nil {
|
|
return "", fmt.Errorf("Error reading file: %v\n", err)
|
|
}
|
|
return string(output), err
|
|
}
|
|
|
|
func startInlineCommand(command string, args ...string) (*exec.Cmd, error) {
|
|
cmd := exec.Command(command, args...)
|
|
cmd.Stdin = os.Stdin
|
|
cmd.Stdout = os.Stdout
|
|
cmd.Stderr = os.Stderr
|
|
err := cmd.Start()
|
|
return cmd, err
|
|
}
|