build: publish tree of files rather than FESMs (#18541)

* Remove now unnecessary portions of build.
* Add a compilePackageES5 method to build ES5 from sources
* Rework all package.json and rollup config files to new format
* Remove "extends" from tsconfig-build.json files and fixup compilation roots

PR Close #18541

packages/platform-webworker-dynamic/index.ts

@@ -6,11 +6,9 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-/**
- * @module
- * @description
- * Entry point for all public APIs of the platform-browser-dynamic package.
- */
-export * from './src/platform-webworker-dynamic';
+// This file is not used to build this module. It is only used during editing
+// by the TypeScript language service and during build for verification. `ngc`
+// replaces this file with production index.ts when it rewrites private symbol
+// names.
 
-// This file only reexports content of the `src` folder. Keep it that way.
+export * from './public_api';

packages/platform-webworker-dynamic/package.json

@@ -3,9 +3,9 @@
   "version": "0.0.0-PLACEHOLDER",
   "description": "Angular - library for using Angular in a web browser with web workers",
   "main": "./bundles/platform-webworker-dynamic.umd.js",
-  "module": "./@angular/platform-webworker-dynamic.es5.js",
-  "es2015": "./@angular/platform-webworker-dynamic.js",
-  "typings": "./platform-webworker-dynamic.d.ts",
+  "module": "./esm5/index.js",
+  "es2015": "./esm15/index.js",
+  "typings": "./index.d.ts",
   "author": "angular",
   "license": "MIT",
   "dependencies": {

packages/platform-webworker-dynamic/public_api.ts

@@ -0,0 +1,15 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+/**
+ * @module
+ * @description
+ * Entry point for all public APIs of this package.
+ */
+export * from './src/platform-webworker-dynamic';
+// This file only reexports content of the `src` folder. Keep it that way.

packages/platform-webworker-dynamic/rollup.config.js

@@ -7,6 +7,7 @@
  */
 
 import resolve from 'rollup-plugin-node-resolve';
+import sourcemaps from 'rollup-plugin-sourcemaps';
 
 const globals = {
   '@angular/core': 'ng.core',
@@ -18,14 +19,13 @@ const globals = {
 };
 
 export default {
-  entry:
-      '../../dist/packages-dist/platform-webworker-dynamic/@angular/platform-webworker-dynamic.es5.js',
+  entry: '../../dist/packages-dist/platform-webworker-dynamic/esm5/index.js',
   dest:
       '../../dist/packages-dist/platform-webworker-dynamic/bundles/platform-webworker-dynamic.umd.js',
   format: 'umd',
   exports: 'named',
   moduleName: 'ng.platformWebworkerDynamic',
-  plugins: [resolve()],
+  plugins: [resolve(), sourcemaps()],
   external: Object.keys(globals),
   globals: globals
 };

packages/platform-webworker-dynamic/tsconfig-build.json

@@ -1,13 +1,9 @@
 {
+  "extends": "../tsconfig-build.json",
+
   "compilerOptions": {
     "baseUrl": ".",
-    "declaration": true,
-    "stripInternal": true,
-    "experimentalDecorators": true,
-    "strictNullChecks": true,
-    "module": "es2015",
-    "moduleResolution": "node",
-    "outDir": "../../dist/packages/platform-webworker-dynamic",
+    "rootDir": ".",
     "paths": {
       "@angular/core": ["../../dist/packages/core"],
       "@angular/common": ["../../dist/packages/common"],
@@ -16,17 +12,18 @@
       "@angular/platform-browser-dynamic": ["../../dist/packages/platform-browser-dynamic"],
       "@angular/platform-webworker": ["../../dist/packages/platform-webworker"]
     },
-    "rootDir": ".",
-    "sourceMap": true,
-    "inlineSources": true,
-    "target": "es2015",
-    "skipLibCheck": true,
-    "lib": ["es2015", "dom"],
-    // don't auto-discover @types/node, it results in a ///<reference in the .d.ts output
-    "types": []
+    "outDir": "../../dist/packages/platform-webworker-dynamic"
   },
+
   "files": [
-    "index.ts",
+    "public_api.ts",
     "../../node_modules/zone.js/dist/zone.js.d.ts"
-  ]
+  ],
+
+  "angularCompilerOptions": {
+    "annotateForClosureCompiler": true,
+    "strictMetadataEmit": true,
+    "flatModuleOutFile": "index.js",
+    "flatModuleId": "@angular/platform-webworker-dynamic"
+  }
 }