Gulp–Recipe for watching and concatenating JS-Files plus server

gulp-concat-server

var gulp = require('gulp');
var concat = require('gulp-concat');
var connect = require('gulp-connect');

gulp.task('js', function() {
  gulp.src(['src/**/*.js'])
  .pipe(concat('app.js'))
  .pipe(gulp.dest('.'))
  .pipe(connect.reload())
});

gulp.task('connect', function() {
  connect.server();
});

gulp.task('default', ['js', 'connect'], function() {
  gulp.watch('src/**/*.js', ['js'])
});