Use coffee script for gulp

gulpfile.coffee

@@ -0,0 +1,43 @@
+gulp = require 'gulp'
+gulp.plugins = require('gulp-load-plugins')()
+
+gulp.config =
+    assetsDir: './assets',
+    bowerDir: './vendor/bower',
+    outputDir: './source/assets',
+    sassPattern: './assets/sass/**/*.sass',
+    jsPattern: 'js/**/*.js',
+    production: !!gulp.plugins.util.env.production,
+    sourceMaps: !gulp.plugins.util.env.production,
+    liveReload: !gulp.plugins.util.env.production,
+    notify: !gulp.plugins.util.env.production
+
+gulp.css = (paths, filename) ->
+    gulp.src paths
+        .pipe gulp.plugins.plumber()
+        .pipe gulp.plugins.if gulp.config.sourceMaps, gulp.plugins.sourcemaps.init()
+        .pipe gulp.plugins.sassGlob()
+        .pipe gulp.plugins.sass()
+        .pipe gulp.plugins.autoprefixer browsers: ['last 2 versions']
+        .pipe gulp.plugins.concat filename
+        .pipe gulp.config.production ? gulp.plugins.cleanCss() || gulp.plugins.util.noop()
+        .pipe gulp.plugins.if gulp.config.sourceMaps, gulp.plugins.sourcemaps.write '.'
+        .pipe gulp.dest gulp.config.outputDir + '/css'
+        # .pipe gulp.config.notify ? gulp.plugins.notify() || gulp.plugins.util.noop()
+        # .pipe gulp.plugins.if gulp.config.liveReload, gulp.plugins.livereload()
+
+gulp.js = (paths, filename) ->
+    gulp.src paths
+        .pipe gulp.plugins.plumber()
+        .pipe gulp.plugins.if gulp.config.sourceMaps, gulp.plugins.sourcemaps.init()
+        .pipe gulp.plugins.concat filename
+        .pipe gulp.config.production ? gulp.plugins.uglify() || gulp.plugins.util.noop()
+        .pipe gulp.plugins.if gulp.config.sourceMaps, gulp.plugins.sourcemaps.write '.'
+        .pipe gulp.dest gulp.config.outputDir + '/js'
+        # .pipe gulp.config.notify ? gulp.plugins.notify() || gulp.plugins.util.noop()
+
+gulp.copy = (srcFiles, outputDir) ->
+    gulp.src srcFiles
+        .pipe gulp.dest outputDir
+
+require("fs").readdirSync("./gulp").forEach (task) -> require "./gulp/#{task}"