feat(@schematics/angular): replace assets with public directory

The `assets` directory is confusing for the users and commonly users place "assets" which are not meant to be copied but instead processed by the build system. This causes some files both bundled and copied.

With this change we rename the `assets` directory to `public` and also move the `favicon.ico` inside this newly created directory.

goldens/public-api/angular_devkit/build_angular/index.md

@@ -80,7 +80,7 @@ export interface AssetPatternObject {
     glob: string;
     ignore?: string[];
     input: string;
-    output: string;
+    output?: string;
 }
 
 // @public

packages/angular/pwa/pwa/index.ts

@@ -146,11 +146,15 @@ export default function (options: PwaOptions): Rule {
     const { title, ...swOptions } = options;
 
     await writeWorkspace(host, workspace);
+    let assetsDir = posix.join(sourcePath, 'assets');
+    if (!host.exists(assetsDir)) {
+      assetsDir = posix.join(sourcePath, 'public');
+    }
 
     return chain([
       externalSchematic('@schematics/angular', 'service-worker', swOptions),
       mergeWith(apply(url('./files/root'), [template({ ...options }), move(sourcePath)])),
-      mergeWith(apply(url('./files/assets'), [move(posix.join(sourcePath, 'assets'))])),
+      mergeWith(apply(url('./files/assets'), [move(assetsDir)])),
       ...[...indexFiles].map((path) => updateIndexFile(path)),
     ]);
   };

packages/angular/pwa/pwa/index_spec.ts

@@ -54,7 +54,7 @@ describe('PWA Schematic', () => {
 
   it('should create icon files', async () => {
     const dimensions = [72, 96, 128, 144, 152, 192, 384, 512];
-    const iconPath = '/projects/bar/src/assets/icons/icon-';
+    const iconPath = '/projects/bar/src/public/icons/icon-';
     const tree = await schematicRunner.runSchematic('ng-add', defaultOptions, appTree);
 
     dimensions.forEach((d) => {

packages/angular_devkit/build_angular/src/builders/application/schema.json

@@ -556,11 +556,12 @@
             },
             "output": {
               "type": "string",
+              "default": "",
               "description": "Absolute path within the output."
             }
           },
           "additionalProperties": false,
-          "required": ["glob", "input", "output"]
+          "required": ["glob", "input"]
         },
         {
           "type": "string"

packages/angular_devkit/build_angular/src/builders/browser-esbuild/schema.json

@@ -467,11 +467,12 @@
             },
             "output": {
               "type": "string",
+              "default": "",
               "description": "Absolute path within the output."
             }
           },
           "additionalProperties": false,
-          "required": ["glob", "input", "output"]
+          "required": ["glob", "input"]
         },
         {
           "type": "string"

packages/angular_devkit/build_angular/src/builders/browser/schema.json

@@ -455,11 +455,12 @@
             },
             "output": {
               "type": "string",
+              "default": "",
               "description": "Absolute path within the output."
             }
           },
           "additionalProperties": false,
-          "required": ["glob", "input", "output"]
+          "required": ["glob", "input"]
         },
         {
           "type": "string"

packages/angular_devkit/build_angular/src/builders/karma/schema.json

@@ -290,6 +290,7 @@
             },
             "output": {
               "type": "string",
+              "default": "",
               "description": "Absolute path within the output."
             },
             "ignore": {
@@ -301,7 +302,7 @@
             }
           },
           "additionalProperties": false,
-          "required": ["glob", "input", "output"]
+          "required": ["glob", "input"]
         },
         {
           "type": "string"

packages/angular_devkit/build_angular/src/builders/server/schema.json

@@ -252,11 +252,12 @@
             },
             "output": {
               "type": "string",
+              "default": "",
               "description": "Absolute path within the output."
             }
           },
           "additionalProperties": false,
-          "required": ["glob", "input", "output"]
+          "required": ["glob", "input"]
         },
         {
           "type": "string"

packages/angular_devkit/build_angular/src/builders/web-test-runner/schema.json

@@ -269,6 +269,7 @@
             },
             "output": {
               "type": "string",
+              "default": "",
               "description": "Absolute path within the output."
             },
             "ignore": {
@@ -280,7 +281,7 @@
             }
           },
           "additionalProperties": false,
-          "required": ["glob", "input", "output"]
+          "required": ["glob", "input"]
         },
         {
           "type": "string"

packages/angular_devkit/build_angular/src/tools/webpack/utils/helpers.ts

@@ -231,7 +231,7 @@ export function assetPatterns(root: string, assets: AssetPatternClass[]) {
   return assets.map((asset: AssetPatternClass, index: number): ObjectPattern => {
     // Resolve input paths relative to workspace root and add slash at the end.
     // eslint-disable-next-line prefer-const
-    let { input, output, ignore = [], glob } = asset;
+    let { input, output = '', ignore = [], glob } = asset;
     input = path.resolve(root, input).replace(/\\/g, '/');
     input = input.endsWith('/') ? input : input + '/';
     output = output.endsWith('/') ? output : output + '/';

packages/angular_devkit/build_angular/src/utils/normalize-asset-patterns.ts

@@ -8,6 +8,7 @@
 
 import { BaseException } from '@angular-devkit/core';
 import { statSync } from 'fs';
+import assert from 'node:assert';
 import * as path from 'path';
 import { AssetPattern, AssetPatternClass } from '../builders/browser/schema';
 
@@ -22,7 +23,7 @@ export function normalizeAssetPatterns(
   workspaceRoot: string,
   projectRoot: string,
   projectSourceRoot: string | undefined,
-): AssetPatternClass[] {
+): (AssetPatternClass & { output: string })[] {
   if (assetPatterns.length === 0) {
     return [];
   }
@@ -68,13 +69,15 @@ export function normalizeAssetPatterns(
 
       assetPattern = { glob, input, output };
     } else {
-      assetPattern.output = path.join('.', assetPattern.output);
+      assetPattern.output = path.join('.', assetPattern.output ?? '');
     }
 
+    assert(assetPattern.output !== undefined);
+
     if (assetPattern.output.startsWith('..')) {
       throw new Error('An asset cannot be written to a location outside of the output path.');
     }
 
-    return assetPattern;
+    return assetPattern as AssetPatternClass & { output: string };
   });
 }

packages/schematics/angular/application/index.ts

@@ -242,7 +242,7 @@ function addAppToWorkspaceFile(
           polyfills: ['zone.js'],
           tsConfig: `${projectRoot}tsconfig.app.json`,
           inlineStyleLanguage,
-          assets: [`${sourceRoot}/favicon.ico`, `${sourceRoot}/assets`],
+          assets: [{ 'glob': '**/*', 'input': `${sourceRoot}/public` }],
           styles: [`${sourceRoot}/styles.${options.style}`],
           scripts: [],
         },

packages/schematics/angular/application/index_spec.ts

@@ -50,7 +50,7 @@ describe('Application Schematic', () => {
       jasmine.arrayContaining([
         '/projects/foo/tsconfig.app.json',
         '/projects/foo/tsconfig.spec.json',
-        '/projects/foo/src/favicon.ico',
+        '/projects/foo/src/public/favicon.ico',
         '/projects/foo/src/index.html',
         '/projects/foo/src/main.ts',
         '/projects/foo/src/styles.css',
@@ -263,7 +263,7 @@ describe('Application Schematic', () => {
         jasmine.arrayContaining([
           '/tsconfig.app.json',
           '/tsconfig.spec.json',
-          '/src/favicon.ico',
+          '/src/public/favicon.ico',
           '/src/index.html',
           '/src/main.ts',
           '/src/styles.css',
@@ -448,7 +448,7 @@ describe('Application Schematic', () => {
     expect(files).toEqual(
       jasmine.arrayContaining([
         '/projects/foo/tsconfig.app.json',
-        '/projects/foo/src/favicon.ico',
+        '/projects/foo/src/public/favicon.ico',
         '/projects/foo/src/index.html',
         '/projects/foo/src/main.ts',
         '/projects/foo/src/styles.css',
@@ -473,7 +473,7 @@ describe('Application Schematic', () => {
     expect(files).toEqual(
       jasmine.arrayContaining([
         '/projects/foo/tsconfig.app.json',
-        '/projects/foo/src/favicon.ico',
+        '/projects/foo/src/public/favicon.ico',
         '/projects/foo/src/index.html',
         '/projects/foo/src/main.ts',
         '/projects/foo/src/styles.css',
@@ -499,7 +499,7 @@ describe('Application Schematic', () => {
     expect(files).toEqual(
       jasmine.arrayContaining([
         '/projects/foo/tsconfig.app.json',
-        '/projects/foo/src/favicon.ico',
+        '/projects/foo/src/public/favicon.ico',
         '/projects/foo/src/index.html',
         '/projects/foo/src/main.ts',
         '/projects/foo/src/styles.css',
@@ -519,7 +519,7 @@ describe('Application Schematic', () => {
       jasmine.arrayContaining([
         '/projects/foo/tsconfig.app.json',
         '/projects/foo/tsconfig.spec.json',
-        '/projects/foo/src/favicon.ico',
+        '/projects/foo/src/public/favicon.ico',
         '/projects/foo/src/index.html',
         '/projects/foo/src/main.ts',
         '/projects/foo/src/styles.css',

tests/legacy-cli/e2e/tests/build/assets.ts

@@ -5,21 +5,21 @@ import { updateJsonFile } from '../../utils/project';
 import { expectToFail } from '../../utils/utils';
 
 export default async function () {
-  await writeFile('src/assets/.file', '');
-  await writeFile('src/assets/test.abc', 'hello world');
+  await writeFile('src/public/.file', '');
+  await writeFile('src/public/test.abc', 'hello world');
 
   await ng('build', '--configuration=development');
 
   await expectFileToExist('dist/test-project/browser/favicon.ico');
-  await expectFileToExist('dist/test-project/browser/assets/.file');
-  await expectFileToMatch('dist/test-project/browser/assets/test.abc', 'hello world');
-  await expectToFail(() => expectFileToExist('dist/test-project/browser/assets/.gitkeep'));
+  await expectFileToExist('dist/test-project/browser/.file');
+  await expectFileToMatch('dist/test-project/browser/test.abc', 'hello world');
+  await expectToFail(() => expectFileToExist('dist/test-project/browser/.gitkeep'));
 
   // Ensure `followSymlinks` option follows symlinks
   await updateJsonFile('angular.json', (workspaceJson) => {
     const appArchitect = workspaceJson.projects['test-project'].architect;
     appArchitect['build'].options.assets = [
-      { glob: '**/*', input: 'src/assets', output: 'assets', followSymlinks: true },
+      { glob: '**/*', input: 'src/public', followSymlinks: true },
     ];
   });
   fs.mkdirSync('dirToSymlink/subdir1', { recursive: true });
@@ -28,12 +28,12 @@ export default async function () {
   fs.writeFileSync('dirToSymlink/subdir1/b.txt', '');
   fs.writeFileSync('dirToSymlink/subdir2/c.txt', '');
   fs.writeFileSync('dirToSymlink/subdir2/subsubdir1/d.txt', '');
-  fs.symlinkSync(process.cwd() + '/dirToSymlink', 'src/assets/symlinkDir');
+  fs.symlinkSync(process.cwd() + '/dirToSymlink', 'src/public/symlinkDir');
 
   await ng('build', '--configuration=development');
 
-  await expectFileToExist('dist/test-project/browser/assets/symlinkDir/a.txt');
-  await expectFileToExist('dist/test-project/browser/assets/symlinkDir/subdir1/b.txt');
-  await expectFileToExist('dist/test-project/browser/assets/symlinkDir/subdir2/c.txt');
-  await expectFileToExist('dist/test-project/browser/assets/symlinkDir/subdir2/subsubdir1/d.txt');
+  await expectFileToExist('dist/test-project/browser/symlinkDir/a.txt');
+  await expectFileToExist('dist/test-project/browser/symlinkDir/subdir1/b.txt');
+  await expectFileToExist('dist/test-project/browser/symlinkDir/subdir2/c.txt');
+  await expectFileToExist('dist/test-project/browser/symlinkDir/subdir2/subsubdir1/d.txt');
 }

tests/legacy-cli/e2e/tests/build/css-urls.ts

@@ -8,6 +8,7 @@ import {
 import { copyProjectAsset } from '../../utils/assets';
 import { expectToFail } from '../../utils/utils';
 import { getGlobalVariable } from '../../utils/env';
+import { mkdir } from 'node:fs/promises';
 
 const imgSvg = `
   <svg width="100" height="100" xmlns="http://www.w3.org/2000/svg">
@@ -22,6 +23,8 @@ export default async function () {
     ? './dist/test-project/browser'
     : './dist/test-project/browser/media';
 
+  await mkdir('src/public/assets/', { recursive: true });
+
   await Promise.resolve()
     // Verify absolute/relative paths in global/component css.
     .then(() =>
@@ -34,8 +37,8 @@ export default async function () {
         h3 { background: url('/assets/component-img-absolute.svg'); }
         h4 { background: url('../assets/component-img-relative.png'); }
       `,
-        'src/assets/global-img-absolute.svg': imgSvg,
-        'src/assets/component-img-absolute.svg': imgSvg,
+        'src/public/assets/global-img-absolute.svg': imgSvg,
+        'src/public/assets/component-img-absolute.svg': imgSvg,
       }),
     )
     .then(() => copyProjectAsset('images/spectrum.png', './src/assets/global-img-relative.png'))

tests/legacy-cli/e2e/tests/build/multiple-configs.ts

@@ -24,7 +24,6 @@ export default async function () {
         sourceMap: true,
         outputHashing: 'none',
         vendorChunk: true,
-        assets: ['src/favicon.ico', 'src/assets'],
         styles: ['src/styles.css'],
         scripts: [],
         budgets: [],

tests/legacy-cli/e2e/tests/build/prerender/http-requests-assets.ts

@@ -39,7 +39,7 @@ export default async function () {
       };
     `,
     // Add asset
-    'src/assets/media.json': JSON.stringify({ dataFromAssets: true }),
+    'src/public/media.json': JSON.stringify({ dataFromAssets: true }),
     // Update component to do an HTTP call to asset.
     'src/app/app.component.ts': `
     import { Component, inject } from '@angular/core';
@@ -60,7 +60,7 @@ export default async function () {
       data: any;
       constructor() {
         const http = inject(HttpClient);
-        http.get('/assets/media.json').subscribe((d) => {
+        http.get('/media.json').subscribe((d) => {
           this.data = d;
         });
       }

tests/legacy-cli/e2e/tests/commands/add/add-pwa.ts

@@ -48,23 +48,4 @@ export default async function () {
 
   await ng('build');
   await expectFileToExist(ngswPath);
-
-  // It should correctly generate assetGroups and include at least one URL in each group.
-  const ngswJson = JSON.parse(await readFile(ngswPath));
-  // @ts-ignore
-  const assetGroups: any[] = ngswJson.assetGroups.map(({ name, urls }) => ({
-    name,
-    urlCount: urls.length,
-  }));
-  const emptyAssetGroups = assetGroups.filter(({ urlCount }) => urlCount === 0);
-
-  if (assetGroups.length === 0) {
-    throw new Error("Expected 'ngsw.json' to contain at least one asset-group.");
-  }
-  if (emptyAssetGroups.length > 0) {
-    throw new Error(
-      'Expected all asset-groups to contain at least one URL, but the following groups are empty: ' +
-        emptyAssetGroups.map(({ name }) => name).join(', '),
-    );
-  }
 }

tests/legacy-cli/e2e/tests/commands/config/config-get.ts

@@ -23,17 +23,17 @@ export default async function () {
     'config',
     `projects.test-project.architect.build.options.assets[0]`,
   );
-  if (!stdout2.includes('src/favicon.ico')) {
-    throw new Error(`Expected "src/favicon.ico", received "${JSON.stringify(stdout)}".`);
+  if (!stdout2.includes('"input": "src/public"')) {
+    throw new Error(`Expected "input": "src/public", received "${JSON.stringify(stdout)}".`);
   }
 
   const { stdout: stdout3 } = await ng(
     'config',
     `projects["test-project"].architect.build.options.assets[0]`,
   );
 
-  if (!stdout3.includes('src/favicon.ico')) {
-    throw new Error(`Expected "src/favicon.ico", received "${JSON.stringify(stdout)}".`);
+  if (!stdout3.includes('"input": "src/public"')) {
+    throw new Error(`Expected "input": "src/public", received "${JSON.stringify(stdout)}".`);
   }
 
   // should print all config when no positional args are provided.

tests/legacy-cli/e2e/tests/commands/serve/assets.ts

@@ -8,12 +8,12 @@ export default async function () {
   const outsideDirectoryName = `../outside-${randomUUID()}`;
 
   await updateJsonFile('angular.json', (json) => {
-    json.projects['test-project'].architect.build.options.assets = [
-      'src/favicon.ico',
-      'src/assets',
-      // Ensure assets located outside the workspace root work with the dev server
-      { 'input': outsideDirectoryName, 'glob': '**/*', 'output': './outside' },
-    ];
+    // Ensure assets located outside the workspace root work with the dev server
+    json.projects['test-project'].architect.build.options.assets.push({
+      'input': outsideDirectoryName,
+      'glob': '**/*',
+      'output': './outside',
+    });
   });
 
   await mkdir(outsideDirectoryName);