Gulp & Usemin

gulpfile.js

/* jshint node: true */
var gulp = require('gulp');
var plumber = require('gulp-plumber');

var path = 'app/';

// Common
var less = require('gulp-less');
function compileLess() {
  return gulp.src(path + 'styles/main.less')
  .pipe(plumber())
  .pipe(less({
    paths: [path + 'styles'],
  }))
  .pipe(gulp.dest('./tmp/styles'));
}

// Dev
var livereload = require('gulp-livereload');
var gprint = require('gulp-print');
var watch = require('gulp-watch');

gulp.task('less', function() {
  return compileLess();
});

gulp.task('default', ['less'], function() {
  gulp.watch(path + 'styles/*.less', ['less']);

  watch({glob: '{' + path + ',.tmp}/**/*.{css,js,html}', emitOnGlob: false}, function(files) {
    return files
    .pipe(gprint())
    .pipe(livereload());
  });
});

// Build dist
var clean = require('gulp-clean');
var usemin = require('gulp-usemin');
var uglify = require('gulp-uglify');
var ngmin = require('gulp-ngmin');
var minifyHtml = require('gulp-minify-html');
var rev = require('gulp-rev');
var sourcemaps = require('gulp-sourcemaps');

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

gulp.task('less:dist', ['clean'], function() {
  return compileLess();
});

gulp.task('copy:dist', ['clean'], function() {
  return gulp.src('app/components/font-awesome/fonts/*', {base: 'app/'})
  .pipe(gulp.dest('build/'));
});

gulp.task('build', ['clean', 'less:dist', 'copy:dist'], function() {
  return gulp.src(path + '{views/**/*,*}.html')
  .pipe(usemin({
    css: [rev()],
    html: [minifyHtml({empty: true})],
    vendorjs: [sourcemaps.init(), uglify(), rev(), sourcemaps.write('.')],
    js: [sourcemaps.init(), ngmin(), uglify(), rev(), sourcemaps.write('.')],
  }))
  .pipe(gulp.dest('build/'));
});