Sample Gulp File (Coffee, SASS, Concat, Uglify)

gulpfile.js

var gulp = require('gulp');
var coffee = require('gulp-coffee');
var concat = require('gulp-concat');
var uglify = require('gulp-uglify');
var compass = require('gulp-compass');
var path =  require('path');

var config = {
  jsExt: {
    files: "js-ext/**/*",
  },
  sass: {
    files: "sass/**/*",
    dest: "css",
    compass: {
      bundle_exec: true,
      style: "compressed",
      css: "css",
      sass: "sass",
      project: path.join(__dirname),
      comments: false
    }
  },
  coffee: {
    files: "coffee/**/*",
    dest: "js"
  },
  uglify: {
    files: "js/**/*",
    dest: "js-min"
  },
  concat: {
    files: "js/**/*",
    dest: "js-min",
    prefix: "package-",
    packages: {
      "beans": [
        "js-ext/ext1.js",
        "js-min/coolBeans.js",
        "js-min/coolBeans2.js"
      ],
      "test1": [
        "js-min/test.js",
        "js-min/test2.js"
      ]
    }
  }
};

// Compass good to go
gulp.task('compass', function(){
  return gulp.src(config.sass.files)
    .pipe(compass(config.sass.compass));
});

// Coffee good to go
gulp.task('coffee', function(){
  return gulp.src(config.coffee.files)
    .pipe(coffee())
    .pipe(gulp.dest(config.coffee.dest));
});

// Uglify good to go
gulp.task('uglify', ['coffee'], function(){
  return gulp.src(config.uglify.files)
    .pipe(uglify())
    .pipe(gulp.dest(config.uglify.dest));
});

// Concat ready to go
gulp.task('concat', ['coffee', 'uglify'], function(){
  var fileName = "";
  Object.keys(config.concat.packages).forEach(function(key) {
    fileName = config.concat.prefix + key + ".js";
    gulp.src(config.concat.packages[key])
      .pipe(concat(fileName))
      .pipe(gulp.dest(config.uglify.dest));
  });
});

// Rerun the task when a file changes
gulp.task('watch', function() {
  gulp.watch(config.coffee.files, ['coffee', 'uglify', 'concat']);
  gulp.watch(config.jsExt.files, ['concat']);
  gulp.watch(config.sass.files, ['compass']);
});

// The default task (called when you run `gulp` from cli)
gulp.task('default', ['coffee', 'uglify', 'concat', 'compass', 'watch']);