feat(@angular/cli): add ngo support

Author: filipesilva

docs/documentation/build.md

@@ -300,3 +300,13 @@ Note: service worker support is experimental and subject to change.
     Run build when files change.
   </p>
 </details>
+
+<details>
+  <summary>ngo</summary>
+  <p>
+    <code>--ngo</code>
+  </p>
+  <p>
+    Enables NGO optimizations when using `--aot`.
+  </p>
+</details>

package.json

@@ -70,6 +70,7 @@
     "magic-string": "^0.19.0",
     "memory-fs": "^0.4.1",
     "minimatch": "^3.0.3",
+    "ngo-loader": "github:filipesilva/ngo#filipe",
     "node-modules-path": "^1.0.0",
     "nopt": "^4.0.1",
     "opn": "4.0.2",

packages/@angular/cli/commands/build.ts

@@ -125,6 +125,12 @@ export const baseBuildCommandOptions: any = [
     default: true,
     aliases: ['dop'],
     description: 'Delete output path before build.'
+  },
+  {
+    name: 'ngo',
+    type: Boolean,
+    default: false,
+    description: 'Enables NGO optimizations when using `--aot`.'
   }
 ];
 

packages/@angular/cli/models/build-options.ts

@@ -18,4 +18,5 @@ export interface BuildOptions {
   poll?: number;
   app?: string;
   deleteOutputPath?: boolean;
+  ngo?: boolean;
 }

packages/@angular/cli/models/webpack-config.ts

@@ -70,6 +70,10 @@ export class NgCliWebpackConfig {
     if (buildOptions.target !== 'development' && buildOptions.target !== 'production') {
       throw new Error("Invalid build target. Only 'development' and 'production' are available.");
     }
+
+    if (buildOptions.ngo && !(buildOptions.aot || buildOptions.target === 'production')) {
+      throw new Error('The `--ngo` option cannot be used without `--aot` (or `--prod`).');
+    }
   }
 
   // Fill in defaults for build targets

packages/@angular/cli/models/webpack-configs/common.ts

@@ -63,6 +63,17 @@ export function getCommonConfig(wco: WebpackConfigOptions) {
     extraPlugins.push(new ProgressPlugin({ profile: buildOptions.verbose, colors: true }));
   }
 
+
+  if (buildOptions.ngo) {
+    extraRules.push({
+      test: /\.js$/,
+      use: [{
+        loader: 'ngo-loader',
+        options: { sourceMap: buildOptions.sourcemaps }
+      }]
+    });
+  }
+
   return {
     devtool: buildOptions.sourcemaps ? 'source-map' : false,
     resolve: {

packages/@angular/cli/models/webpack-configs/typescript.ts

@@ -74,7 +74,6 @@ function _createAotPlugin(wco: WebpackConfigOptions, options: any) {
     }, options));
 }
 
-
 export const getNonAotConfig = function(wco: WebpackConfigOptions) {
   const { appConfig, projectRoot } = wco;
   const tsConfigPath = path.resolve(projectRoot, appConfig.root, appConfig.tsconfig);
@@ -86,7 +85,7 @@ export const getNonAotConfig = function(wco: WebpackConfigOptions) {
 };
 
 export const getAotConfig = function(wco: WebpackConfigOptions) {
-  const { projectRoot, appConfig } = wco;
+  const { projectRoot, buildOptions, appConfig } = wco;
   const tsConfigPath = path.resolve(projectRoot, appConfig.root, appConfig.tsconfig);
   const testTsConfigPath = path.resolve(projectRoot, appConfig.root, appConfig.testTsconfig);
 
@@ -99,8 +98,16 @@ export const getAotConfig = function(wco: WebpackConfigOptions) {
     pluginOptions.exclude = exclude;
   }
 
+  let ngoLoader: any = [];
+  if (buildOptions.ngo) {
+    ngoLoader = [{
+      loader: 'ngo-loader',
+      options: { sourceMap: buildOptions.sourcemaps }
+    }];
+  }
+
   return {
-    module: { rules: [{ test: /\.ts$/, loader: webpackLoader }] },
+    module: { rules: [{ test: /\.ts$/, use: [...ngoLoader, webpackLoader] }] },
     plugins: [ _createAotPlugin(wco, pluginOptions) ]
   };
 };

packages/@angular/cli/package.json

@@ -55,6 +55,7 @@
     "lodash": "^4.11.1",
     "memory-fs": "^0.4.1",
     "minimatch": "^3.0.3",
+    "ngo-loader": "github:filipesilva/ngo#filipe",
     "node-modules-path": "^1.0.0",
     "nopt": "^4.0.1",
     "opn": "4.0.2",

tests/e2e/tests/build/ngo.ts

@@ -0,0 +1,9 @@
+import { ng } from '../../utils/process';
+import { expectFileToMatch } from '../../utils/fs';
+import { expectToFail } from '../../utils/utils';
+
+
+export default function () {
+  return ng('build', '--aot', '--ngo')
+    .then(() => expectToFail(() => expectFileToMatch('dist/vendor.js', /\.decorators =/)));
+}