gulpfile.js
function git_commit(cb) {
    var package = require('./package.json');
    exec('git commit -m "Version ' + package.version + ' release."', function (err, stdout, stderr) {
        console.log(stdout);
        console.log(stderr);
        cb(err);
    });
}
function git_commit(cb) {
    var package = require('./package.json');
    exec('git commit -m "Version ' + package.version + ' release."', function (err, stdout, stderr) {
        console.log(stdout);
        console.log(stderr);
        cb(err);
    });
}
function git_commit ( cb ) { var package = require ( './package.json' ) ; exec ( 'git commit -m "Version ' + package . version + ' release."' , function ( err , stdout , stderr ) { console . log ( stdout ) ; console . log ( stderr ) ; cb ( err ) ; } ) ; }
8.  git commit
8 . git commit