commit.js

var through = require('through2');
var gutil = require('gulp-util');
var exec = require('child_process').exec;
var escape = require('any-shell-escape');

module.exports = function (message, opt) {
  if(!opt) opt = {};
  if(!message) throw new Error('gulp-git: Commit message is required git.commit("commit message")');
  if(!opt.args) opt.args = ' ';

  var files = [];
  var defaultCwd = process.cwd();

  var write = function(file, enc, cb){
    files.push(file);
    cb();
  };
  
  var flush = function(cb){
    // if we got files pick the cwd off the first one, otherwise just use process.cwd
    var fileCwd = (files.length > 0 ? files[0].cwd : defaultCwd);
    
    // if we got cwd as an option prefer that over fileCwd
    var cwd = opt.cwd || fileCwd;
  
    var cmd = 'git commit -m "' + message + '" ' + escape(files) + ' ' + opt.args;
    exec(cmd, {cwd: cwd}, function(err, stdout, stderr){
      if(err) return cb(err);
      gutil.log(stdout, stderr);
      
      // emit all buffered files
      files.forEach(this.push.bind(this));
      cb();
    });
  };
  
  var stream = through.obj(write, flush);
  return stream;
};