gulpfile.js

var gulp = require('gulp');
var clean = require('gulp-clean');
var concat = require('gulp-concat');
var csslint = require('gulp-csslint');
var header = require('gulp-header');
var jshint = require('gulp-jshint');
var minifyCSS = require('gulp-minify-css');
var sass = require('gulp-sass');
var rename = require('gulp-rename');
var uglify = require('gulp-uglify');
var zip = require('gulp-zip');

var pkg = require('./package.json');
var basename = pkg.name + '-' + pkg.version;
var banner = '/*! {{ pkg.name }} v{{ pkg.version }} */';

// SASS compilation
gulp.task('sass', function () {
    gulp.src('./src/*.scss')
        .pipe(sass().on('error', sass.logError))
        .pipe(gulp.dest('./src'));
});

// Lint JS + CSS
gulp.task('lint', ['lint:js', 'lint:css']);

gulp.task('lint:js', function() {
  return gulp.src('./src/*.js')
    .pipe(jshint())
    .pipe(jshint.reporter());
});

gulp.task('lint:css', ['sass'], function() {
  return gulp.src('./src/*.css')
    .pipe(csslint({
      'adjoining-classes': false,
      'box-sizing': false,
      'fallback-colors': false
    }))
    .pipe(csslint.reporter());
});

// Concat JS + CSS
gulp.task('concat', ['concat:js', 'concat:css']);

gulp.task('concat:js', function() {
  return gulp.src('./src/*.js')
    .pipe(concat(basename +'.js'))
    .pipe(gulp.dest('./dist'));
});

gulp.task('concat:css', ['sass'], function() {
  return gulp.src('./src/*.css')
    .pipe(concat(basename +'.css'))
    .pipe(gulp.dest('./dist'));
});

// Minify JS + CSS
gulp.task('minify', ['minify:js', 'minify:css']);

gulp.task('minify:js', ['concat:js'], function() {
  return gulp.src('./dist/' + basename + '.js')
    .pipe(rename(basename + '.min.js'))
    .pipe(uglify())
    .pipe(header(banner, { pkg : pkg } ))
    .pipe(gulp.dest('./dist'));
});

gulp.task('minify:css', ['concat:css'], function() {
  return gulp.src('./dist/' + basename + '.css')
    .pipe(rename(basename + '.min.css'))
    .pipe(minifyCSS())
    .pipe(header(banner, { pkg : pkg } ))
    .pipe(gulp.dest('./dist'));
});

// Package for distribution
gulp.task('zip', ['minify'], function() {
  return gulp.src([
    'README.md',
    'LICENSE',
    'dist/' + basename + '.js',
    'dist/' + basename + '.min.js',
    'dist/' + basename + '.css',
    'dist/' + basename + '.min.css',
  ])
  .pipe(rename(function (dir, base, ext) {
    return (dir == 'dist' ? '../' : '') + base + ext;
  }))
  .pipe(zip(basename + '.zip'))
  .pipe(gulp.dest('dist'));
});

// Cleanup
gulp.task('clean', function() {
  return gulp.src('./dist', {read: false})
    .pipe(clean());
});

// Watch JS + CSS Files
gulp.task('watch', function(){
  gulp.run('lint');
  gulp.watch(['./src/*.js', './src/*.css'], function(event){
    gulp.run('lint');
  });
});

// Default
gulp.task('default', function(){
  gulp.run('lint', 'minify');
});