feat(build): use static files for css

Fix angular#2148
Fix angular#2020
Fix angular#2826
Close angular#2646

Author: jimitndiaye

package.json

@@ -68,6 +68,7 @@
     "exit": "^0.1.2",
     "exports-loader": "^0.6.3",
     "expose-loader": "^0.7.1",
+    "extract-text-webpack-plugin": "^2.0.0-beta.4",
     "file-loader": "^0.8.5",
     "fs-extra": "^0.30.0",
     "fs.realpath": "^1.0.0",

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

@@ -71,24 +71,6 @@ export function getWebpackCommonConfig(
           loaders: ['raw-loader', 'postcss-loader', 'sass-loader']
         },
 
-        // outside of main, load it via style-loader
-        {
-          include: styles,
-          test: /\.css$/,
-          loaders: ['style-loader', 'css-loader', 'postcss-loader']
-        }, {
-          include: styles,
-          test: /\.styl$/,
-          loaders: ['style-loader', 'css-loader', 'postcss-loader', 'stylus-loader']
-        }, {
-          include: styles,
-          test: /\.less$/,
-          loaders: ['style-loader', 'css-loader', 'postcss-loader', 'less-loader']
-        }, {
-          include: styles,
-          test: /\.scss$|\.sass$/,
-          loaders: ['style-loader', 'css-loader', 'postcss-loader', 'sass-loader']
-        },
 
         // load global scripts using script-loader
         { include: scripts, test: /\.js$/, loader: 'script-loader' },

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

@@ -1,13 +1,40 @@
 const path = require('path');
 
 export const getWebpackDevConfigPartial = function(projectRoot: string, appConfig: any) {
+  const appRoot = path.resolve(projectRoot, appConfig.root);
+  const styles = appConfig.styles
+               ? appConfig.styles.map((style: string) => path.resolve(appRoot, style))
+               : [];
+  const cssLoaders = ['style-loader', 'css-loader?sourcemap', 'postcss-loader'];
   return {
     devtool: 'source-map',
     output: {
       path: path.resolve(projectRoot, appConfig.outDir),
       filename: '[name].bundle.js',
       sourceMapFilename: '[name].map',
       chunkFilename: '[id].chunk.js'
+    },
+    module: {
+      rules: [
+        // outside of main, load it via style-loader for development builds
+        {
+          include: styles,
+          test: /\.css$/,
+          loaders: cssLoaders
+        }, {
+          include: styles,
+          test: /\.styl$/,
+          loaders: [...cssLoaders, 'stylus-loader?sourcemap']
+        }, {
+          include: styles,
+          test: /\.less$/,
+          loaders: [...cssLoaders, 'less-loader?sourcemap']
+        }, {
+          include: styles,
+          test: /\.scss$|\.sass$/,
+          loaders: [...cssLoaders, 'sass-loader?sourcemap']
+        },
+      ]
     }
   };
 };

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

@@ -2,6 +2,7 @@ import * as path from 'path';
 const WebpackMd5Hash = require('webpack-md5-hash');
 const CompressionPlugin = require('compression-webpack-plugin');
 import * as webpack from 'webpack';
+const ExtractTextPlugin = require('extract-text-webpack-plugin');
 
 declare module 'webpack' {
   export interface LoaderOptionsPlugin {}
@@ -14,6 +15,11 @@ declare module 'webpack' {
 }
 
 export const getWebpackProdConfigPartial = function(projectRoot: string, appConfig: any) {
+  const appRoot = path.resolve(projectRoot, appConfig.root);
+  const styles = appConfig.styles
+               ? appConfig.styles.map((style: string) => path.resolve(appRoot, style))
+               : [];
+  const cssLoaders = ['css-loader?sourcemap&minimize', 'postcss-loader'];
   return {
     devtool: 'source-map',
     output: {
@@ -23,7 +29,30 @@ export const getWebpackProdConfigPartial = function(projectRoot: string, appConf
       sourceMapFilename: '[name].[chunkhash].bundle.map',
       chunkFilename: '[id].[chunkhash].chunk.js'
     },
+    module: {
+      rules: [
+        // outside of main, load it via extract-text-plugin for production builds
+        {
+          include: styles,
+          test: /\.css$/,
+          loaders: ExtractTextPlugin.extract(cssLoaders)
+        }, {
+          include: styles,
+          test: /\.styl$/,
+          loaders: ExtractTextPlugin.extract([...cssLoaders, 'stylus-loader?sourcemap'])
+        }, {
+          include: styles,
+          test: /\.less$/,
+          loaders: ExtractTextPlugin.extract([...cssLoaders, 'less-loader?sourcemap'])
+        }, {
+          include: styles,
+          test: /\.scss$|\.sass$/,
+          loaders: ExtractTextPlugin.extract([...cssLoaders, 'sass-loader?sourcemap'])
+        },
+      ]
+    },
     plugins: [
+      new ExtractTextPlugin('[name].[contenthash].bundle.css'),
       new WebpackMd5Hash(),
       new webpack.DefinePlugin({
         'process.env.NODE_ENV': JSON.stringify('production')

packages/angular-cli/package.json

@@ -49,6 +49,7 @@
     "exit": "^0.1.2",
     "exports-loader": "^0.6.3",
     "expose-loader": "^0.7.1",
+    "extract-text-webpack-plugin": "^2.0.0-beta.4",
     "file-loader": "^0.8.5",
     "fs-extra": "^0.30.0",
     "fs.realpath": "^1.0.0",

tests/e2e/tests/build/prod-build.ts

@@ -34,6 +34,7 @@ export default function() {
     .then(() => expectFileToExist(join(process.cwd(), 'dist')))
     // Check for cache busting hash script src
     .then(() => expectFileToMatch('dist/index.html', /main\.[0-9a-f]{20}\.bundle\.js/))
+    .then(() => expectFileToMatch('dist/index.html', /styles\.[0-9a-f]{32}\.bundle\.css/))
 
     // Check that the process didn't change local files.
     .then(() => expectGitToBeClean())

tests/e2e/tests/build/styles/css.ts

@@ -1,19 +1,53 @@
+import * as glob from 'glob';
+
 import {writeMultipleFiles, expectFileToMatch} from '../../../utils/fs';
 import {ng} from '../../../utils/process';
+import {updateJsonFile} from '../../../utils/project';
 
 
 export default function() {
   return writeMultipleFiles({
     'src/styles.css': `
       @import './imported-styles.css';
-      
+
       body { background-color: blue; }
     `,
     'src/imported-styles.css': `
       p { background-color: red; }
+    `,
+    'src/styles.less': `
+        .outer {
+          .inner {
+            background: #fff;
+          }
+        }
+    `,
+    'src/styles.scss': `
+        .upper {
+          .lower {
+            background: #def;
+          }
+        }
     `
   })
+    .then(() => updateJsonFile('angular-cli.json', configJson => {
+      const app = configJson['apps'][0];
+      app['styles'].push('styles.less');
+      app['styles'].push('styles.scss');
+    }))
     .then(() => ng('build'))
     .then(() => expectFileToMatch('dist/styles.bundle.js', 'body { background-color: blue; }'))
-    .then(() => expectFileToMatch('dist/styles.bundle.js', 'p { background-color: red; }'));
+    .then(() => expectFileToMatch('dist/styles.bundle.js', 'p { background-color: red; }'))
+    .then(() => expectFileToMatch('dist/styles.bundle.js', /.outer.*.inner.*background:\s*#[fF]+/))
+    .then(() => expectFileToMatch('dist/styles.bundle.js', /.upper.*.lower.*background.*#def/))
+
+    .then(() => ng('build', '--prod'))
+    .then(() => new Promise<string>(() =>
+      glob.sync('dist/styles.*.bundle.css').find(file => !!file)))
+    .then((styles) =>
+      expectFileToMatch(styles, 'body { background-color: blue; }')
+        .then(() => expectFileToMatch(styles, 'p { background-color: red; }')
+        .then(() => expectFileToMatch(styles, /.outer.*.inner.*background:\s*#[fF]+/))
+        .then(() => expectFileToMatch(styles, /.upper.*.lower.*background.*#def/)))
+    );
 }