Tareas comunes y útiles para el día a día con Gulp

gulpfile.js

var gulp = require('gulp'),
    gutil = require('gulp-util'),
    concat = require('gulp-concat'),
    sourcemaps = require('gulp-sourcemaps'),
    uglify = require('gulp-uglify'),
    debug = require('gulp-debug'),
    clean = require('gulp-clean'),
    autoprefixer  = require('gulp-autoprefixer'),
    uncss = require('gulp-uncss'),
    cssmin = require('gulp-cssmin'),
    rename = require('gulp-rename'),
    concatCss = require('gulp-concat-css'),
    browserSync = require('browser-sync').create();

gulp.task('default', ['css-min', 'track']);

gulp.task('track', function(){
    browserSync.init({
         server: "."
     });
     //gulp.watch("css/*.css", ['css']);
     gulp.watch("*.html").on('change', browserSync.reload);
     //gulp.watch("./*.html", ["html"]);
})

gulp.task('build-js', function() {
  return gulp.src(['*.js', '!test/*.js', '!Gulpfile.js'])
    .pipe(sourcemaps.init())
      .pipe(concat('controller.js'))
      .pipe(uglify()) 
    .pipe(sourcemaps.write())
    .pipe(gulp.dest('dist/'));
});

gulp.task('empty-out', function () {
    return gulp.src('./out/**/*.*', {read: false})
        .pipe(debug({title: 'Remove:out Task:'}))
        .pipe(clean());
});

gulp.task('css', ["empty-out"], function () {
   return gulp.src('./css/*.css')
        .pipe(debug({title: 'CSS Task:'}))
    	.pipe(autoprefixer({
    		browsers: ['last 3 versions']
    	}))
     .pipe(concatCss("css/gameloft-test.css"))
     .pipe(uncss({
         html: ['index.html']
     }))
     .pipe(browserSync.stream())
     .pipe(gulp.dest('./out'));
});

gulp.task('css-min', ["css"], function () {
    gulp.src('out/**/*.css')
        .pipe(debug({title: 'CSS:MIN Task:'}))
        .pipe(cssmin())
        .pipe(rename({suffix: '.min'}))
        .pipe(gulp.dest('./out'));
});