Merge pull request #18 from kubernetes/gulp-build

Gulp task that creates production build of the app

build/build.js

+// Copyright 2015 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview Gulp tasks for building the project.
+ */
+import del from 'del';
+import gulp from 'gulp';
+import gulpEslint from 'gulp-eslint';
+import gulpFilter from 'gulp-filter';
+import gulpInject from 'gulp-inject';
+import gulpMinifyCss from 'gulp-minify-css';
+import gulpMinifyHtml from 'gulp-minify-html';
+import gulpUglify from 'gulp-uglify';
+import gulpUseref from 'gulp-useref';
+import gulpRev from 'gulp-rev';
+import gulpRevReplace from 'gulp-rev-replace';
+import gulpSize from 'gulp-size';
+import gulpSourcemaps from 'gulp-sourcemaps';
+import uglifySaveLicense from 'uglify-save-license';
+import path from 'path';
+
+import conf from './conf';
+
+
+/**
+ * Builds production package and places it in the dist directory.
+ *
+ * Following steps are done here:
+ *  1. Vendor CSS and JS files are concatenated and minified.
+ *  2. index.html is minified.
+ *  3. CSS and JS assets are suffixed with version hash.
+ *  4. Everything is saved in the dist directory.
+ */
+gulp.task('build', ['index:prod', 'assets'], function () {
+  let htmlFilter = gulpFilter('*.html', {restore: true});
+  let vendorCssFilter = gulpFilter('**/vendor.css', {restore: true});
+  let vendorJsFilter = gulpFilter('**/vendor.js', {restore: true});
+  let assets;
+
+  return gulp.src(path.join(conf.paths.prodTmp, '*.html'))
+    .pipe(assets = gulpUseref.assets({
+      searchPath: [
+        // To resolve local paths.
+        conf.paths.prodTmp,
+        // To resolve bower_components/... paths.
+        conf.paths.base
+      ]
+    }))
+    .pipe(vendorCssFilter)
+    .pipe(gulpMinifyCss())
+    .pipe(vendorCssFilter.restore)
+    .pipe(vendorJsFilter)
+    .pipe(gulpUglify({preserveComments: uglifySaveLicense}))
+    .pipe(vendorJsFilter.restore)
+    .pipe(gulpRev())
+    .pipe(assets.restore())
+    .pipe(gulpUseref({searchPath: [conf.paths.prodTmp]}))
+    .pipe(gulpRevReplace())
+    .pipe(htmlFilter)
+    .pipe(gulpMinifyHtml({
+      empty: true,
+      spare: true,
+      quotes: true
+    }))
+    .pipe(htmlFilter.restore)
+    .pipe(gulp.dest(conf.paths.dist))
+    .pipe(gulpSize({showFiles: true}));
+});
+
+
+/**
+ * Copies assets to the dist directory.
+ */
+gulp.task('assets', function () {
+  return gulp.src(path.join(conf.paths.assets, '/**/*'), {base: conf.paths.app})
+    .pipe(gulp.dest(conf.paths.dist));
+});
+
+
+/**
+ * Cleans all build artifacts.
+ */
+gulp.task('clean', function () {
+  return del([path.join(conf.paths.dist, '/'), path.join(conf.paths.tmp, '/')]);
+});