尝试实现 gulp-git 和 gulp-prompt 以允许自定义提交消息

Question

尝试使用 gulp-prompt 实现 gulp-git 时，我遇到了许多错误。我试图让用户能够在键入命令gulp commit时输入自己唯一的git提交消息。该消息应在用户键入 gulp-commit 命令后显示。

这是 gulp 命令

//git commit task with gulp prompt
gulp.task('commit', function(){
    var message;
    gulp.src('./*', {buffer:false})
    .pipe(prompt.prompt({
        type: 'input',
        name: 'commit',
        message: 'Please enter commit message...'
    },  function(res){
        message = res.commit;
    }))
    .pipe(git.commit(message));
});

目前，在终端中键入命令后，我收到以下错误。

TypeError: Cannot call method 'indexOf' of undefined
  at Object.module.exports [as commit] (/Users/me/Desktop/Example 4/node_modules/gulp-git/lib/commit.js:15:18)
  at Gulp.gulp.task.gulp.src.pipe.git.add.args (/Users/me/Desktop/Example 4/gulpfile.js:190:15)
  at module.exports (/Users/me/Desktop/Example 4/node_modules/gulp/node_modules/orchestrator/lib/runTask.js:34:7)
  at Gulp.Orchestrator._runTask (/Users/me/Desktop/Example 4/node_modules/gulp/node_modules/orchestrator/index.js:273:3)
  at Gulp.Orchestrator._runStep (/Users/me/Desktop/Example 4/node_modules/gulp/node_modules/orchestrator/index.js:214:10)
  at Gulp.Orchestrator.start (/Users/me/Desktop/Example 4/node_modules/gulp/node_modules/orchestrator/index.js:134:8)
  at /usr/local/lib/node_modules/gulp/bin/gulp.js:129:20
  at process._tickCallback (node.js:442:13)
  at Function.Module.runMain (module.js:499:11)
  at startup (node.js:119:16)
  at node.js:929:3
[?] Please enter commit message...

Answer 1

gulp-prompt不能很好地处理流，所以gulp-git（这里：git.commit）将在message仍然undefined时执行。因此，gulp-git 块需要在 gulp-prompt 的回调中移动：

// git commit task with gulp prompt
gulp.task('commit', function(){
    // just source anything here - we just wan't to call the prompt for now
    gulp.src('package.json')
    .pipe(prompt.prompt({
        type: 'input',
        name: 'commit',
        message: 'Please enter commit message...'
    },  function(res){
      // now add all files that should be committed
      // but make sure to exclude the .gitignored ones, since gulp-git tries to commit them, too
      return gulp.src([ '!node_modules/', './*' ], {buffer:false})
      .pipe(git.commit(res.commit));
    }));
});