gulpfile.js

var gulp = require('gulp');
var uglify = require('gulp-uglify');
var cleanCSS = require('gulp-clean-css');
var concat = require('gulp-concat');

var paths = {
  vendorcss:[
    './node_modules/jquery-autocomplete/jquery.autocomplete.css',
    './node_modules/bootstrap/dist/css/bootstrap.min.css',
    './components/fortawesome/font-awesome/v4.7.0/css/font-awesome.css',
    './node_modules/angular/angular-csp.css'
  ],
  css: [
    './assets/css/header.css',
    './assets/css/menu_top.css',
    './assets/css/menu_left.css',
    './assets/css/content.css',
    './assets/css/footer.css'
  ],
  fonts:[
    './node_modules/bootstrap/dist/fonts/*',
    './node_modules/components-font-awesome/fonts/*'
  ],
  vendorjs:[
    './node_modules/jquery/dist/jquery.min.js',
    './node_modules/bootstrap/dist/js/bootstrap.js',
    './node_modules/jquery-autocomplete/jquery.autocomplete.js',
    './library/lib/js/modernizr.custom.91586.js',
    './library/lib/js/jquery.maskedinput.min.js',
    './node_modules/angular/angular.min.js'
  ],
  js:[
    './assets/js/main.js',
    './assets/js/validations.js'
  ]  
};

gulp.task('vendorcss', function(done) {
  gulp.src(paths.vendorcss)
      .pipe(concat('vendor.css'))
      .pipe(cleanCSS())
      .pipe(gulp.dest('./public/css/'))
      .on('end', done);
});

gulp.task('css', function(done) {
  gulp.src(paths.css)
    .pipe(concat('styles.css'))
    .pipe(cleanCSS())
    .pipe(gulp.dest('./public/css/'))
    .on('end', done);
});

gulp.task('fonts', function(done) {
  gulp.src(paths.fonts)
     .pipe(gulp.dest('./public/fonts/'))
     .on('end', done);
});

gulp.task('vendorjs', function (done) {
  gulp.src(paths.vendorjs)
     .pipe(concat('vendor.js'))
     .pipe(uglify())
     .pipe(gulp.dest('./public/js/'))
     .on('end', done);
});
gulp.task('js', function (done) {
  gulp.src(paths.js)
     .pipe(concat('main.js'))
     .pipe(uglify())
     .pipe(gulp.dest('./public/js/'))
     .on('end', done);
});

gulp.task('minify', ['vendorjs', 'js', 'vendorcss', 'css']);
gulp.task('default', ['minify', 'fonts']);

gulp.task('watch', function() {
  gulp.watch(paths.css, ['css']);
  gulp.watch(paths.js, ['js'])
  ;
});