Get it all somewhat working

.travis.yml

@@ -15,7 +15,7 @@ addons:
     packages:
     - google-chrome-stable
 script:
-  - npm run js_prod
+  - npm run build
   - npm run test
   - xvfb-run wct
   - if [ "${TRAVIS_PULL_REQUEST}" = "false" ]; then wct --plugin sauce; fi

gulp/config.js

@@ -0,0 +1,7 @@
+var path = require('path');
+
+module.exports = {
+  static_dir: path.resolve(__dirname, '../..'),
+  polymer_dir: path.resolve(__dirname, '..'),
+  build_dir: path.resolve(__dirname, '../build'),
+};

gulp/tasks/build.js

@@ -0,0 +1,107 @@
+import { gulp as cssSlam } from 'css-slam';
+import gulp from 'gulp';
+import babel from 'gulp-babel';
+import filter from 'gulp-filter';
+import htmlMinifier from 'gulp-html-minifier';
+import gulpif from 'gulp-if';
+import { PolymerProject, HtmlSplitter } from 'polymer-build';
+import {
+  composeStrategies,
+  generateShellMergeStrategy,
+} from 'polymer-bundler';
+import mergeStream from 'merge-stream';
+import rename from 'gulp-rename';
+
+import polymerConfig from '../../polymer';
+
+function minifyStream(stream) {
+  const sourcesHtmlSplitter = new HtmlSplitter();
+  return stream
+    .pipe(sourcesHtmlSplitter.split())
+    .pipe(gulpif(/\.js$/, babel({
+      presets: ['babili'], // 'es2015'
+      // plugins: ['external-helpers']
+    })))
+    .pipe(gulpif(/\.css$/, cssSlam()))
+    .pipe(gulpif(/\.html$/, cssSlam()))
+    .pipe(gulpif(/\.html$/, htmlMinifier({
+      collapseWhitespace: true,
+      removeComments: true
+    })))
+    .pipe(sourcesHtmlSplitter.rejoin());
+}
+
+function renamePanel(path) {
+  // Rename panels to be panels/* and not their subdir
+  if (path.basename.substr(0, 9) === 'ha-panel-' && path.extname === '.html') {
+    path.dirname = 'panels/';
+  }
+
+  // Rename frontend
+  if (path.dirname === 'src' && path.basename === 'home-assistant' &&
+      path.extname === '.html') {
+    path.dirname = '';
+    path.basename = 'frontend';
+  }
+}
+
+/**
+ * Polymer build strategy to strip imports, even if explictely imported
+ */
+function generateStripStrategy(urls) {
+  return (bundles) => {
+    for (const bundle of bundles) {
+      for (const url of urls) {
+        bundle.stripImports.add(url);
+      }
+    }
+    return bundles;
+  };
+}
+
+/**
+ * Polymer build strategy to strip everything but the entrypoints
+ * for bundles that match a specific entry point.
+ */
+function stripAllButEntrypoint(entryPoint) {
+  return (bundles) => {
+    for (const bundle of bundles) {
+      if (bundle.entrypoints.has(entryPoint)) {
+        for (const file of bundle.files) {
+          if (!bundle.entrypoints.has(file)) {
+            bundle.stripImports.add(file);
+          }
+        }
+      }
+    }
+    return bundles;
+  };
+}
+
+
+gulp.task('build', ['ru_all'], () => {
+  const strategy = composeStrategies([
+    generateShellMergeStrategy(polymerConfig.shell),
+    generateStripStrategy([
+      'bower_components/font-roboto/roboto.html',
+      'bower_components/paper-styles/color.html',
+    ]),
+    stripAllButEntrypoint('panels/hassio/ha-panel-hassio.html')
+  ]);
+  const project = new PolymerProject(polymerConfig);
+
+  return mergeStream(minifyStream(project.sources()),
+              minifyStream(project.dependencies()))
+    .pipe(project.bundler({
+      strategy,
+      strip: true,
+      sourcemaps: false,
+      stripComments: true,
+      inlineScripts: true,
+      inlineCss: true,
+      implicitStrip: true,
+    }))
+    .pipe(rename(renamePanel))
+    .pipe(filter(['**', '!src/entrypoint.html']))
+    .pipe(gulp.dest('build/'));
+});

gulp/tasks/clean.js

@@ -0,0 +1,6 @@
+import del from 'del';
+import gulp from 'gulp';
+
+gulp.task('clean', () => {
+  return del(['build', 'build-temp']);
+});

gulp/tasks/default.js

@@ -0,0 +1,9 @@
+import gulp from 'gulp';
+import runSequence from 'run-sequence';
+
+gulp.task('default', () => {
+  return runSequence.use(gulp)(
+    'clean',
+    'build',
+  );
+});

gulp/tasks/gen-service-worker.js

@@ -0,0 +1,109 @@
+/*
+Generate a caching service worker for HA
+
+Will be called as part of build_frontend.
+
+Expects home-assistant-polymer repo as submodule of HA repo.
+Creates a caching service worker based on the CURRENT content of HA repo.
+Output service worker to build/service_worker.js
+
+TODO:
+ - Use gulp streams
+*/
+var gulp = require('gulp');
+var crypto = require('crypto');
+var fs = require('fs');
+var path = require('path');
+var swPrecache = require('sw-precache');
+var uglifyJS = require('uglify-js');
+
+const config = require('../config');
+
+const DEV = !!JSON.parse(process.env.BUILD_DEV || 'true');
+
+var rootDir = config.static_dir;
+var panelDir = path.resolve(rootDir, 'panels');
+
+var dynamicUrlToDependencies = {
+  '/': [
+    rootDir + '/frontend.html',
+    rootDir + '/core.js',
+    rootDir + '/compatibility.js',
+  ],
+};
+
+var staticFingerprinted = [
+  'frontend.html',
+  'mdi.html',
+  'core.js',
+  'compatibility.js',
+];
+
+// These panels will always be registered inside HA and thus can
+// be safely assumed to be able to preload.
+var panelsFingerprinted = [
+  'map', 'dev-event', 'dev-info', 'dev-service', 'dev-state', 'dev-template',
+  'dev-mqtt',
+];
+
+function md5(filename) {
+  return crypto.createHash('md5')
+    .update(fs.readFileSync(filename)).digest('hex');
+}
+
+gulp.task('gen-service-worker', () => {
+  // Create fingerprinted versions of our dependencies.
+  staticFingerprinted.forEach(fn => {
+    var parts = path.parse(fn);
+    var hash = md5(rootDir + '/' + parts.name + parts.ext);
+    var url = '/static/' + parts.name + '-' + hash + parts.ext;
+    var fpath = rootDir + '/' + parts.name + parts.ext;
+    dynamicUrlToDependencies[url] = [fpath];
+  });
+
+  panelsFingerprinted.forEach(panel => {
+    var fpath = panelDir + '/ha-panel-' + panel + '.html';
+    var hash = md5(fpath);
+    var url = '/frontend/panels/' + panel + '-' + hash + '.html';
+    dynamicUrlToDependencies[url] = [fpath];
+  });
+
+  var options = {
+    navigateFallback: '/',
+    navigateFallbackWhitelist: [/^((?!(static|api|local|service_worker.js|manifest.json)).)*$/],
+    dynamicUrlToDependencies: dynamicUrlToDependencies,
+    staticFileGlobs: [
+      rootDir + '/icons/favicon.ico',
+      rootDir + '/icons/favicon-192x192.png',
+      rootDir + '/webcomponents-lite.min.js',
+      rootDir + '/fonts/roboto/Roboto-Light.ttf',
+      rootDir + '/fonts/roboto/Roboto-Medium.ttf',
+      rootDir + '/fonts/roboto/Roboto-Regular.ttf',
+      rootDir + '/fonts/roboto/Roboto-Bold.ttf',
+      rootDir + '/images/card_media_player_bg.png',
+    ],
+    stripPrefix: '..',
+    replacePrefix: 'static',
+    verbose: true,
+  };
+
+  var devBase = 'console.warn("Service worker caching disabled in development")';
+
+  var swHass = fs.readFileSync(path.resolve(__dirname, 'service-worker.js.tmpl'), 'UTF-8');
+
+  var genPromise = DEV ? Promise.resolve(devBase) : swPrecache.generate(options);
+
+  genPromise = genPromise.then(swString => swString + '\n' + swHass);
+
+  // Fix this
+  // if (!DEV) {
+  //   genPromise = genPromise.then(
+  //     swString => uglifyJS.minify(swString, { fromString: true }).code);
+  // }
+
+  genPromise.then(swString => {
+    fs.writeFileSync(path.resolve(config.build_dir, 'service_worker.js'), swString);
+  });
+
+  return genPromise;
+});

script/hassio-panel.js → gulp/tasks/hassio-panel.js

@@ -1,16 +1,13 @@
-#!/usr/bin/env node
-
+/*
+TODO:
+ - Use gulp streams
+ - Use polymer bundler to vulcanize
+*/
+var gulp = require('gulp');
 var Vulcanize = require('vulcanize');
 var minify = require('html-minifier');
 var fs = require('fs');
 
-if (!fs.existsSync('build')) {
-  fs.mkdirSync('build');
-}
-if (!fs.existsSync('build/panels')) {
-  fs.mkdirSync('build/panels');
-}
-
 function minifyHTML(html) {
   return minify.minify(html, {
     customAttrAssign: [/\$=/],
@@ -68,7 +65,14 @@ function vulcanizeEntry(entry) {
   });
 }
 
-toProcess.reduce(
-      (p, entry) => p.then(() => vulcanizeEntry(entry)),
-      Promise.resolve())
-    .catch(err => console.error('Something went wrong!', err));
+gulp.task('hassio-panel', () => {
+  if (!fs.existsSync('build-temp')) {
+    fs.mkdirSync('build-temp');
+  }
+
+  toProcess.reduce(
+        (p, entry) => p.then(() => vulcanizeEntry(entry)),
+        Promise.resolve());
+
+  return toProcess;
+});

gulp/tasks/rollup.js

@@ -0,0 +1,29 @@
+import gulp from 'gulp';
+import rollupEach from 'gulp-rollup-each';
+import rollupConfig from '../../rollup.config';
+
+gulp.task('run_rollup', () => {
+  return gulp.src([
+    'js/core.js',
+    'js/compatibility.js',
+    'js/editor/editor.js',
+    'demo_data/demo_data.js',
+  ])
+  .pipe(rollupEach(rollupConfig))
+  .pipe(gulp.dest('build-temp'));
+});
+
+gulp.task('ru_all', ['run_rollup'], () => {
+  gulp.src([
+    'build-temp/core.js',
+    'build-temp/compatibility.js',
+  ])
+  .pipe(gulp.dest('build/'));
+});
+
+gulp.task('watch_ru_all', ['ru_all'], () => {
+  gulp.watch([
+    'js/**/*.js',
+    'demo_data/**/*.js'
+  ], ['ru_all']);
+});