fix(@angular/cli): fix asset watching

https://github.com/kevlened/copy-webpack-plugin is now used instead of the custom plugin, it has since implemented the features we needed.

Fix #7521

package.json

@@ -48,6 +48,7 @@
     "chalk": "^2.0.1",
     "circular-dependency-plugin": "^3.0.0",
     "common-tags": "^1.3.1",
+    "copy-webpack-plugin": "^4.0.1",
     "core-object": "^3.1.0",
     "css-loader": "^0.28.1",
     "cssnano": "^3.10.0",
@@ -105,6 +106,7 @@
     "@angular/core": "^4.0.0",
     "@types/chalk": "^0.4.28",
     "@types/common-tags": "^1.2.4",
+    "@types/copy-webpack-plugin": "^4.0.0",
     "@types/denodeify": "^1.2.30",
     "@types/express": "^4.0.32",
     "@types/fs-extra": "^4.0.0",

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

@@ -1,9 +1,10 @@
 import * as webpack from 'webpack';
 import * as path from 'path';
-import { GlobCopyWebpackPlugin } from '../../plugins/glob-copy-webpack-plugin';
+import * as CopyWebpackPlugin from 'copy-webpack-plugin';
 import { NamedLazyChunksWebpackPlugin } from '../../plugins/named-lazy-chunks-webpack-plugin';
 import { InsertConcatAssetsWebpackPlugin } from '../../plugins/insert-concat-assets-webpack-plugin';
-import { extraEntryParser, getOutputHashFormat } from './utils';
+import { extraEntryParser, getOutputHashFormat, AssetPattern } from './utils';
+import { isDirectory } from '../../utilities/is-directory';
 import { WebpackConfigOptions } from '../webpack-config';
 
 const ConcatPlugin = require('webpack-concat-plugin');
@@ -84,10 +85,44 @@ export function getCommonConfig(wco: WebpackConfigOptions) {
 
   // process asset entries
   if (appConfig.assets) {
-    extraPlugins.push(new GlobCopyWebpackPlugin({
-      patterns: appConfig.assets,
-      globOptions: { cwd: appRoot, dot: true, ignore: '**/.gitkeep' }
-    }));
+    const copyWebpackPluginPatterns = appConfig.assets.map((asset: string | AssetPattern) => {
+      // Convert all string assets to object notation.
+      asset = typeof asset === 'string' ? { glob: asset } : asset;
+      // Add defaults.
+      // Input is always resolved relative to the appRoot.
+      asset.input = path.resolve(appRoot, asset.input || '');
+      asset.output = asset.output || '';
+      asset.glob = asset.glob || '';
+
+      // Ensure trailing slash.
+      if (isDirectory(path.resolve(asset.input))) {
+        asset.input += '/';
+      }
+
+      // Convert dir patterns to globs.
+      if (isDirectory(path.resolve(asset.input, asset.glob))) {
+        asset.glob = asset.glob + '/**/*';
+      }
+
+      return {
+        context: asset.input,
+        to: asset.output,
+        from: {
+          glob: asset.glob,
+          dot: true
+        }
+      };
+    });
+    const copyWebpackPluginOptions = { ignore: ['.gitkeep'] };
+
+    const copyWebpackPluginInstance = new CopyWebpackPlugin(copyWebpackPluginPatterns,
+      copyWebpackPluginOptions);
+
+    // Save options so we can use them in eject.
+    (copyWebpackPluginInstance as any)['copyWebpackPluginPatterns'] = copyWebpackPluginPatterns;
+    (copyWebpackPluginInstance as any)['copyWebpackPluginOptions'] = copyWebpackPluginOptions;
+
+    extraPlugins.push(copyWebpackPluginInstance);
   }
 
   if (buildOptions.progress) {

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

@@ -58,6 +58,11 @@ export const getProdConfig = function (wco: WebpackConfigOptions) {
       `);
     }
 
+    // CopyWebpackPlugin replaces GlobCopyWebpackPlugin, but AngularServiceWorkerPlugin depends
+    // on specific behaviour from latter.
+    // AngularServiceWorkerPlugin expects the ngsw-manifest.json to be present in the 'emit' phase
+    // but with CopyWebpackPlugin it's only there on 'after-emit'.
+    // So for now we keep it here, but if AngularServiceWorkerPlugin changes we remove it.
     extraPlugins.push(new GlobCopyWebpackPlugin({
       patterns: [
         'ngsw-manifest.json',

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

@@ -87,3 +87,9 @@ export function getOutputHashFormat(option: string, length = 20): HashFormat {
   /* tslint:enable:max-line-length */
   return hashFormats[option] || hashFormats['none'];
 }
+
+export interface AssetPattern {
+  glob: string;
+  input?: string;
+  output?: string;
+}

packages/@angular/cli/package.json

@@ -36,6 +36,7 @@
     "chalk": "^2.0.1",
     "circular-dependency-plugin": "^3.0.0",
     "common-tags": "^1.3.1",
+    "copy-webpack-plugin": "^4.0.1",
     "core-object": "^3.1.0",
     "css-loader": "^0.28.1",
     "cssnano": "^3.10.0",

packages/@angular/cli/plugins/glob-copy-webpack-plugin.ts

@@ -2,33 +2,21 @@ import * as fs from 'fs';
 import * as path from 'path';
 import * as glob from 'glob';
 import * as denodeify from 'denodeify';
+import { AssetPattern } from '../models/webpack-configs/utils';
+import { isDirectory } from '../utilities/is-directory';
 
 const flattenDeep = require('lodash/flattenDeep');
 const globPromise = <any>denodeify(glob);
 const statPromise = <any>denodeify(fs.stat);
 
-function isDirectory(path: string) {
-  try {
-    return fs.statSync(path).isDirectory();
-  } catch (_) {
-    return false;
-  }
-}
-
 interface Asset {
   originPath: string;
   destinationPath: string;
   relativePath: string;
 }
 
-export interface Pattern {
-  glob: string;
-  input?: string;
-  output?: string;
-}
-
 export interface GlobCopyWebpackPluginOptions {
-  patterns: (string | Pattern)[];
+  patterns: (string | AssetPattern)[];
   globOptions: any;
 }
 
@@ -79,7 +67,7 @@ export class GlobCopyWebpackPlugin {
 
     compiler.plugin('emit', (compilation: any, cb: any) => {
       // Create an array of promises for each pattern glob
-      const globs = patterns.map((pattern: Pattern) => new Promise((resolve, reject) =>
+      const globs = patterns.map((pattern: AssetPattern) => new Promise((resolve, reject) =>
         // Individual patterns can override cwd
         globPromise(pattern.glob, Object.assign({}, globOptions, { cwd: pattern.input }))
           // Map the results onto an Asset

packages/@angular/cli/plugins/karma.ts

@@ -4,7 +4,8 @@ import * as glob from 'glob';
 import * as webpack from 'webpack';
 const webpackDevMiddleware = require('webpack-dev-middleware');
 
-import { Pattern } from './glob-copy-webpack-plugin';
+import { AssetPattern } from '../models/webpack-configs/utils';
+import { isDirectory } from '../utilities/is-directory';
 import { WebpackTestConfig, WebpackTestOptions } from '../models/webpack-test-config';
 import { KarmaWebpackThrowError } from './karma-webpack-throw-error';
 
@@ -22,14 +23,6 @@ const getAppFromConfig = require('../utilities/app-utils').getAppFromConfig;
 let blocked: any[] = [];
 let isBlocked = false;
 
-function isDirectory(path: string) {
-  try {
-    return fs.statSync(path).isDirectory();
-  } catch (_) {
-    return false;
-  }
-}
-
 // Add files to the Karma files array.
 function addKarmaFiles(files: any[], newFiles: any[], prepend = false) {
   const defaults = {
@@ -82,7 +75,7 @@ const init: any = (config: any, emitter: any, customFileHandlers: any) => {
   // Add assets. This logic is mimics the one present in GlobCopyWebpackPlugin.
   if (appConfig.assets) {
     config.proxies = config.proxies || {};
-    appConfig.assets.forEach((pattern: Pattern) => {
+    appConfig.assets.forEach((pattern: AssetPattern) => {
       // Convert all string patterns to Pattern type.
       pattern = typeof pattern === 'string' ? { glob: pattern } : pattern;
       // Add defaults.

packages/@angular/cli/tasks/eject.ts

@@ -161,6 +161,7 @@ class JsonWebpackSerializer {
   private _pluginsReplacer(plugins: any[]) {
     return plugins.map(plugin => {
       let args = plugin.options || undefined;
+      const serializer = (args: any) => JSON.stringify(args, (k, v) => this._replacer(k, v), 2);
 
       switch (plugin.constructor) {
         case ProgressPlugin:
@@ -231,11 +232,17 @@ class JsonWebpackSerializer {
         default:
           if (plugin.constructor.name == 'AngularServiceWorkerPlugin') {
             this._addImport('@angular/service-worker/build/webpack', plugin.constructor.name);
+          } else if (plugin['copyWebpackPluginPatterns']) {
+            // CopyWebpackPlugin doesn't have a constructor nor save args.
+            this.variableImports['copy-webpack-plugin'] = 'CopyWebpackPlugin';
+            const patternsSerialized = serializer(plugin['copyWebpackPluginPatterns']);
+            const optionsSerialized = serializer(plugin['copyWebpackPluginOptions']) || 'undefined';
+            return `\uFF02CopyWebpackPlugin(${patternsSerialized}, ${optionsSerialized})\uFF02`;
           }
           break;
       }
 
-      const argsSerialized = JSON.stringify(args, (k, v) => this._replacer(k, v), 2) || '';
+      const argsSerialized = serializer(args) || '';
       return `\uFF02${plugin.constructor.name}(${argsSerialized})\uFF02`;
     });
   }
@@ -538,6 +545,7 @@ export default Task.extend({
           'url-loader',
           'circular-dependency-plugin',
           'webpack-concat-plugin',
+          'copy-webpack-plugin',
         ].forEach((packageName: string) => {
           packageJson['devDependencies'][packageName] = ourPackageJson['dependencies'][packageName];
         });

packages/@angular/cli/utilities/is-directory.ts

@@ -0,0 +1,9 @@
+import * as fs from 'fs';
+
+export function isDirectory(path: string) {
+  try {
+    return fs.statSync(path).isDirectory();
+  } catch (_) {
+    return false;
+  }
+}