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fix(@ngtools/webpack): fix resolution fallback of paths-plugin
If there is a package.json we should also verify that it has a main or fesm field to see if webpack would actually resolve it properly. Otherwise use the JavaScript resolution. This is a temporary fix and still has obvious limitations and issues. Namely, this code is never run if there is only one path mapping, but that falls outside the scope of this fix. Also, some people might have valid packages but want to resolve to the JS file itself (which is what TypeScript does by default). These should be fixed with a refactoring of the path plugin. Fixes NativeScript/nativescript-dev-webpack#607
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+222
-8
lines changed

14 files changed

+222
-8
lines changed

Diff for: ‎packages/ngtools/webpack/src/paths-plugin.ts

+28-8
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@@ -160,15 +160,35 @@ export function resolveWithPaths(
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const jsFilePath = `${pathNoExtension}.js`;
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if (host.fileExists(pathNoExtension)) {
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// This is mainly for secondary entry points
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// ex: 'node_modules/@angular/core/testing.d.ts' -> 'node_modules/@angular/core/testing'
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request.request = pathNoExtension;
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} else if (host.fileExists(packageRootPath)) {
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// Let webpack resolve the correct module format
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request.request = pathDirName;
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} else if (host.fileExists(jsFilePath)) {
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// This is mainly for secondary entry points
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// ex: 'node_modules/@angular/core/testing.d.ts' -> 'node_modules/@angular/core/testing'
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request.request = pathNoExtension;
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} else {
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const packageJsonContent = host.readFile(packageRootPath);
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let newRequest: string | undefined;
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if (packageJsonContent) {
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try {
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const packageJson = JSON.parse(packageJsonContent);
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// Let webpack resolve the correct module format IIF there is a main field in the
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// package.json.
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if (packageJson.main) {
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newRequest = pathDirName;
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}
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} catch {
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// Ignore exceptions and let it fall through (ie. if package.json file is invalid).
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}
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}
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if (newRequest === undefined && host.fileExists(jsFilePath)) {
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// Otherwise, if there is a file with a .js extension use that
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request.request = jsFilePath;
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newRequest = jsFilePath;
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}
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if (newRequest !== undefined) {
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request.request = newRequest;
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}
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}
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callback(null, request);

Diff for: ‎tests/legacy-cli/e2e/assets/webpack/test-app-path-mapping/aotplugin.config.json

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@@ -0,0 +1,4 @@
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{
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"tsConfigPath": "./src/tsconfig.json",
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"mainPath": "app/main.jit.ts"
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}

Diff for: ‎tests/legacy-cli/e2e/assets/webpack/test-app-path-mapping/package.json

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@@ -0,0 +1,29 @@
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{
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"name": "test",
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"license": "MIT",
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"dependencies": {
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"@angular/common": "^5.0.0-rc.8",
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"@angular/compiler": "^5.0.0-rc.8",
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"@angular/compiler-cli": "^5.0.0-rc.8",
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"@angular/core": "^5.0.0-rc.8",
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"@angular/http": "^5.0.0-rc.8",
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"@angular/platform-browser": "^5.0.0-rc.8",
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"@angular/platform-browser-dynamic": "^5.0.0-rc.8",
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"@angular/platform-server": "^5.0.0-rc.8",
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"@angular/router": "^5.0.0-rc.8",
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"@ngtools/webpack": "0.0.0",
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"core-js": "^2.4.1",
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"rxjs": "^5.5.0",
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"zone.js": "^0.8.14"
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},
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"devDependencies": {
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"node-sass": "^4.7.0",
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"performance-now": "^0.2.0",
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"preprocess-loader": "^0.2.2",
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"raw-loader": "^0.5.1",
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"sass-loader": "^6.0.0",
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"typescript": "~2.4.2",
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"webpack": "~4.0.1",
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"webpack-cli": "~2.0.9"
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}
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}

Diff for: ‎tests/legacy-cli/e2e/assets/webpack/test-app-path-mapping/src/app/app.module.ts

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@@ -0,0 +1,29 @@
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/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import { Component, NgModule } from '@angular/core';
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import { BrowserModule } from '@angular/platform-browser';
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import { Foo } from 'foo/foo';
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console.log(Foo); // Make sure it's used.
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@Component({
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selector: 'home-view',
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template: 'home!',
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})
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export class HomeView {}
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@NgModule({
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declarations: [
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HomeView,
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],
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imports: [
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BrowserModule,
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],
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bootstrap: [HomeView],
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})
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export class AppModule { }

Diff for: ‎tests/legacy-cli/e2e/assets/webpack/test-app-path-mapping/src/app/main.jit.ts

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@@ -0,0 +1,5 @@
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import 'core-js/es7/reflect';
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import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';
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import {AppModule} from './app.module';
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platformBrowserDynamic().bootstrapModule(AppModule);

Diff for: ‎tests/legacy-cli/e2e/assets/webpack/test-app-path-mapping/src/foo/foo.d.ts

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@@ -0,0 +1,9 @@
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/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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export class Foo {}

Diff for: ‎tests/legacy-cli/e2e/assets/webpack/test-app-path-mapping/src/foo/foo.js

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console.log('NGTOOLS_WEBPACK_TEST_WRONG_FILE');
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module.exports = {
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Foo: () => {}, // Empty "class".
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};

Diff for: ‎tests/legacy-cli/e2e/assets/webpack/test-app-path-mapping/src/foo/package.json

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@@ -0,0 +1,3 @@
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{
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"main": "right/foo.js"
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}

Diff for: ‎tests/legacy-cli/e2e/assets/webpack/test-app-path-mapping/src/foo/right/foo.js

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@@ -0,0 +1,6 @@
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console.log('NGTOOLS_WEBPACK_TEST_RIGHT_FILE');
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module.exports = {
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Foo: () => {}, // Empty "class".
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};

Diff for: ‎tests/legacy-cli/e2e/assets/webpack/test-app-path-mapping/src/index.html

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<html>
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<head>
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<meta charset="UTF-8">
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<title>Document</title>
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<base href="">
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</head>
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<body>
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<app-root></app-root>
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<script src="node_modules/zone.js/dist/zone.js"></script>
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<script src="dist/app.main.js"></script>
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</body>
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</html>

Diff for: ‎tests/legacy-cli/e2e/assets/webpack/test-app-path-mapping/src/tsconfig.json

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{
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"compilerOptions": {
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"module": "es2015",
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"moduleResolution": "node",
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"target": "es5",
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"baseUrl": ".",
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"noImplicitAny": false,
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"sourceMap": true,
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"mapRoot": "",
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"emitDecoratorMetadata": true,
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"experimentalDecorators": true,
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"lib": [
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"es2017",
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"dom"
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],
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"outDir": "lib",
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"skipLibCheck": true,
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"rootDir": ".",
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"paths": {
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"foo/*": [
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"./foo/*",
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"*"
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]
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}
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},
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"angularCompilerOptions": {
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"genDir": "app/generated/",
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"entryModule": "app/app.module#AppModule"
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}
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}

Diff for: ‎tests/legacy-cli/e2e/assets/webpack/test-app-path-mapping/webpack.config.js

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@@ -0,0 +1,45 @@
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/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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const ngToolsWebpack = require('@ngtools/webpack');
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const path = require('path');
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const flags = require('./webpack.flags.json');
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const preprocessLoader = 'preprocess-loader' + (flags.DEBUG ? '?+DEBUG' : '');
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module.exports = {
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resolve: {
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extensions: ['.ts', '.js']
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},
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entry: './src/app/main.jit.ts',
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output: {
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path: path.resolve('./dist'),
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publicPath: 'dist/',
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filename: 'app.main.js'
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},
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plugins: [
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new ngToolsWebpack.AngularCompilerPlugin(require('./aotplugin.config.json'))
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],
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module: {
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rules: [
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{ test: /\.scss$/, loaders: ['raw-loader', 'sass-loader', preprocessLoader] },
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{ test: /\.css$/, loader: 'raw-loader' },
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{ test: /\.html$/, loaders: ['raw-loader', preprocessLoader] },
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// Use preprocess to remove DEBUG only code.
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// @ngtools/webpack must be the first (right most) loader.
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{ test: /\.ts$/, use: [
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{ loader: preprocessLoader },
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{ loader: '@ngtools/webpack' }
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] }
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]
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},
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devServer: {
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historyApiFallback: true
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}
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};

Diff for: ‎tests/legacy-cli/e2e/assets/webpack/test-app-path-mapping/webpack.flags.json

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{
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"DEBUG": false
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}

Diff for: ‎tests/legacy-cli/e2e/tests/packages/webpack/test-path-mapping.ts

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@@ -0,0 +1,13 @@
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import {normalize} from 'path';
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import {createProjectFromAsset} from '../../../utils/assets';
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import {exec} from '../../../utils/process';
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import {expectFileSizeToBeUnder, replaceInFile, expectFileToMatch} from '../../../utils/fs';
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export default function(skipCleaning: () => void) {
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return Promise.resolve()
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.then(() => createProjectFromAsset('webpack/test-app-path-mapping'))
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.then(() => exec(normalize('node_modules/.bin/webpack-cli')))
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.then(() => expectFileToMatch('dist/app.main.js', 'NGTOOLS_WEBPACK_TEST_RIGHT_FILE'))
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.then(() => skipCleaning());
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}

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