fix(build): hashes in prod builds now changes when ID change.

Fixes angular#2868.
Fixes angular#3311.

Author: hansl

packages/angular-cli/blueprints/ng2/files/package.json

@@ -20,7 +20,7 @@
     "@angular/http": "~2.3.1",
     "@angular/platform-browser": "~2.3.1",
     "@angular/platform-browser-dynamic": "~2.3.1",
-    "@angular/router": "3.2.3",
+    "@angular/router": "~3.3.1",
     "core-js": "^2.4.1",
     "rxjs": "5.0.0-rc.4",
     "ts-helpers": "^1.1.1",

packages/angular-cli/models/webpack-build-production.ts

@@ -1,6 +1,5 @@
 import * as path from 'path';
 import * as webpack from 'webpack';
-const WebpackMd5Hash = require('webpack-md5-hash');
 const ExtractTextPlugin = require('extract-text-webpack-plugin');
 import {CompressionPlugin} from '../lib/webpack/compression-plugin';
 const autoprefixer = require('autoprefixer');
@@ -30,7 +29,6 @@ export const getWebpackProdConfigPartial = function(projectRoot: string,
     },
     plugins: [
       new ExtractTextPlugin('[name].[chunkhash].bundle.css'),
-      new WebpackMd5Hash(),
       new webpack.DefinePlugin({
         'process.env.NODE_ENV': JSON.stringify('production')
       }),

tests/e2e/assets/webpack/test-app-weird/package.json

@@ -10,7 +10,7 @@
     "@angular/platform-browser": "~2.3.1",
     "@angular/platform-browser-dynamic": "~2.3.1",
     "@angular/platform-server": "~2.3.1",
-    "@angular/router": "~3.2.3",
+    "@angular/router": "~3.3.1",
     "@ngtools/webpack": "0.0.0",
     "core-js": "^2.4.1",
     "rxjs": "5.0.0-rc.4",

tests/e2e/assets/webpack/test-app/package.json

@@ -10,7 +10,7 @@
     "@angular/platform-browser": "~2.3.1",
     "@angular/platform-browser-dynamic": "~2.3.1",
     "@angular/platform-server": "~2.3.1",
-    "@angular/router": "~3.2.3",
+    "@angular/router": "~3.3.1",
     "@ngtools/webpack": "0.0.0",
     "core-js": "^2.4.1",
     "rxjs": "5.0.0-rc.4",

tests/e2e/tests/build/chunk-hash.ts

@@ -0,0 +1,48 @@
+import * as fs from 'fs';
+
+import {ng} from '../../utils/process';
+import {writeFile} from '../../utils/fs';
+
+
+export default function() {
+  const oldHashes: {[module: string]: string} = {};
+  const newHashes: {[module: string]: string} = {};
+  // First, collect the hashes.
+  return ng('build', '--prod')
+    .then(() => {
+      fs.readdirSync('./dist')
+        .forEach(name => {
+          if (!name.match(/(main|inline|vendor)\.[a-z0-9]+\.bundle\.js/)) {
+            return;
+          }
+
+          const [module, hash] = name.split('.');
+          oldHashes[module] = hash;
+        });
+    })
+    .then(() => writeFile('src/app/app.component.css', 'body { background: red; }'))
+    .then(() => ng('build', '--prod'))
+    .then(() => {
+      fs.readdirSync('./dist')
+        .forEach(name => {
+          if (!name.match(/(main|inline|vendor)\.[a-z0-9]+\.bundle\.js/)) {
+            return;
+          }
+
+          const [module, hash] = name.split('.');
+          newHashes[module] = hash;
+        });
+    })
+    .then(() => {
+      console.log('  Validating hashes...');
+      console.log(`  Old hashes: ${JSON.stringify(oldHashes)}`);
+      console.log(`  New hashes: ${JSON.stringify(newHashes)}`);
+
+      Object.keys(oldHashes)
+        .forEach(module => {
+          if (oldHashes[module] == newHashes[module]) {
+            throw new Error(`Module "${module}" did not change hash (${oldHashes[module]})...`);
+          }
+        });
+    });
+}