add a namespace option for public-assets plugin

docs/v2-faq.md

@@ -141,7 +141,8 @@ This is done by adding some meta data to the addon's `package.json`, specifying
 }
 ```
 
-If you have many files you want to expose this way, you can instead add the `addon.publicAssets()` plugin from `@embroider/addon-dev` to your Rollup config to automate the generation of this mapping data.
+If you have many files you want to expose this way, you can instead add the `addon.publicAssets()` plugin from `@embroider/addon-dev` to your Rollup config to automate the generation of this mapping data. This rollup plugin will automatically prefix your public assets with a folder name that matches your addon packages name, this is to prevent any name clashes between addons. You can read more about it in the docs for the addon-dev rollup plugin utilities https://github.com/embroider-build/embroider/tree/main/packages/addon-dev#rollup-utilities
+
 
 ## Build setup
 

packages/addon-dev/README.md

@@ -18,6 +18,10 @@ For a guide on porting a V1 addon to V2, see https://github.com/embroider-build/
 2. Copy the `./sample-rollup.config.js` in this repo to your own `rollup.config.js`.
 3. Copy the `./sample-babel.config.json` in this repo to your own `babel.config.json`.
 
+### addon.publicAssets(path <required>, options)
+
+A rollup plugin to expose a folder of assets. `path` is a required to define which folder to expose. `options.include` is a glob pattern passed to `walkSync.include` to pick files. `options.exlude` is a glob pattern passed to `walkSync.ignore` to exclude files. `options.namespace` is the namespace to expose files, defaults to the package name
+
 ## addon-dev command
 
 The `addon-dev` command helps with common tasks in v2 addons.

packages/addon-dev/src/rollup-public-assets.ts

@@ -1,10 +1,34 @@
 import { readJsonSync, writeJsonSync } from 'fs-extra';
 import walkSync from 'walk-sync';
 import type { Plugin } from 'rollup';
+import { resolve, join } from 'path/posix';
 
+export interface PublicAssetsOptions {
+  /**
+   * glob pattern passed to `walkSync.include` to pick files
+   */
+  include?: string[];
+
+  /**
+   * glob pattern passed to `walkSync.ignore` to exclude files
+   */
+  exclude?: string[];
+
+  /**
+   * namespace to expose files
+   */
+  namespace?: string;
+}
+
+/**
+ * A rollup plugin to expose a folder of assets
+ *
+ * @param path - the public folder that you want to add as public assets
+ * @returns
+ */
 export default function publicAssets(
   path: string,
-  opts: { include: string[]; exclude: string[] }
+  opts?: PublicAssetsOptions
 ): Plugin {
   const includeGlobPatterns = opts?.include;
   const excludedGlobPatterns = opts?.exclude || [];
@@ -27,7 +51,9 @@ export default function publicAssets(
       });
       const publicAssets: Record<string, string> = filenames.reduce(
         (acc: Record<string, string>, v): Record<string, string> => {
-          acc[`./${path}/${v}`] = ['/', pkg.name, '/', path, '/', v].join('');
+          acc[`./${path}/${v}`] = resolve(
+            '/' + join(opts?.namespace ?? pkg.name, path, v)
+          );
           return acc;
         },
         {}

packages/addon-dev/src/rollup.ts

@@ -6,7 +6,10 @@ import type { Options as DelOptions } from 'rollup-plugin-delete';
 import { default as clean } from 'rollup-plugin-delete';
 import { default as keepAssets } from './rollup-keep-assets';
 import { default as dependencies } from './rollup-addon-dependencies';
-import { default as publicAssets } from './rollup-public-assets';
+import {
+  default as publicAssets,
+  type PublicAssetsOptions,
+} from './rollup-public-assets';
 import type { Plugin } from 'rollup';
 
 export class Addon {
@@ -102,7 +105,7 @@ export class Addon {
     return dependencies();
   }
 
-  publicAssets(path: string, opts: { include: string[]; exclude: string[] }) {
+  publicAssets(path: string, opts?: PublicAssetsOptions) {
     return publicAssets(path, opts);
   }
 }

tests/scenarios/v2-addon-dev-test.ts

@@ -1,6 +1,6 @@
 import path from 'path';
 import { appScenarios, baseV2Addon } from './scenarios';
-import { PreparedApp } from 'scenario-tester';
+import { PreparedApp, type Project } from 'scenario-tester';
 import QUnit from 'qunit';
 import merge from 'lodash/merge';
 import type { ExpectFile } from '@embroider/test-support/file-assertions/qunit';
@@ -74,6 +74,7 @@ appScenarios
             addon.hbs(),
             addon.gjs(),
             addon.dependencies(),
+            addon.publicAssets('public'),
 
             babel({ babelHelpers: 'bundled', extensions: ['.js', '.hbs', '.gjs'] }),
 
@@ -151,19 +152,87 @@ appScenarios
           },
         },
       },
+      public: {
+        'thing.txt': 'hello there',
+      },
     });
 
-    addon.linkDependency('@embroider/addon-shim', { baseDir: __dirname });
-    addon.linkDependency('@embroider/addon-dev', { baseDir: __dirname });
-    addon.linkDependency('babel-plugin-ember-template-compilation', { baseDir: __dirname });
-    addon.linkDevDependency('@babel/core', { baseDir: __dirname });
-    addon.linkDevDependency('@babel/plugin-transform-class-static-block', { baseDir: __dirname });
-    addon.linkDevDependency('@babel/plugin-transform-class-properties', { baseDir: __dirname });
-    addon.linkDevDependency('@babel/plugin-proposal-decorators', { baseDir: __dirname });
-    addon.linkDevDependency('@rollup/plugin-babel', { baseDir: __dirname });
-    addon.linkDevDependency('rollup', { baseDir: __dirname });
+    let addonNoNamespace = baseV2Addon();
+    addonNoNamespace.pkg.name = 'v2-addon-no-namespace';
+    addonNoNamespace.pkg.scripts = {
+      build: 'node ./node_modules/rollup/dist/bin/rollup -c ./rollup.config.mjs',
+    };
+
+    merge(addonNoNamespace.files, {
+      src: {
+        components: {
+          'hello.hbs': '<h1>hello</h1>',
+        },
+      },
+      public: {
+        'other.txt': 'we meet again',
+      },
+      'babel.config.json': `
+        {
+          "plugins": [
+            "@embroider/addon-dev/template-colocation-plugin",
+            "@babel/plugin-transform-class-static-block",
+            ["babel-plugin-ember-template-compilation", {
+              targetFormat: 'hbs',
+              compilerPath: 'ember-source/dist/ember-template-compiler',
+            }],
+            ["@babel/plugin-proposal-decorators", { "legacy": true }],
+            [ "@babel/plugin-transform-class-properties" ]
+          ]
+        }
+      `,
+      'rollup.config.mjs': `
+        import { babel } from '@rollup/plugin-babel';
+        import { Addon } from '@embroider/addon-dev/rollup';
+
+        const addon = new Addon({
+          srcDir: 'src',
+          destDir: 'dist',
+        });
+
+        export default {
+          output: addon.output(),
+
+          plugins: [
+            addon.publicEntrypoints([
+              'components/**/*.js',
+            ], {
+              exclude: ['**/-excluded/**/*'],
+            }),
+
+            addon.hbs(),
+            addon.publicAssets('public', { namespace: '' }),
+
+            babel({ babelHelpers: 'bundled', extensions: ['.js', '.hbs', '.gjs'] }),
+
+            addon.clean(),
+          ],
+        };
+      `,
+    });
+
+    function linkDependencies(addon: Project) {
+      addon.linkDependency('@embroider/addon-shim', { baseDir: __dirname });
+      addon.linkDependency('@embroider/addon-dev', { baseDir: __dirname });
+      addon.linkDependency('babel-plugin-ember-template-compilation', { baseDir: __dirname });
+      addon.linkDevDependency('@babel/core', { baseDir: __dirname });
+      addon.linkDevDependency('@babel/plugin-transform-class-static-block', { baseDir: __dirname });
+      addon.linkDevDependency('@babel/plugin-transform-class-properties', { baseDir: __dirname });
+      addon.linkDevDependency('@babel/plugin-proposal-decorators', { baseDir: __dirname });
+      addon.linkDevDependency('@rollup/plugin-babel', { baseDir: __dirname });
+      addon.linkDevDependency('rollup', { baseDir: __dirname });
+    }
+
+    linkDependencies(addon);
+    linkDependencies(addonNoNamespace);
 
     project.addDevDependency(addon);
+    project.addDependency(addonNoNamespace);
 
     merge(project.files, {
       tests: {
@@ -226,6 +295,7 @@ appScenarios
         if (result.exitCode !== 0) {
           throw new Error(result.output);
         }
+        await inDependency(app, 'v2-addon-no-namespace').execute('pnpm build');
       });
 
       hooks.beforeEach(assert => {
@@ -301,6 +371,17 @@ setComponentTemplate(
 export { SingleFileComponent as default };
 //# sourceMappingURL=single-file-component.js.map`);
         });
+
+        test('publicAssets are namespaced correctly', async function (assert) {
+          let expectNoNamespaceFile = expectFilesAt(inDependency(app, 'v2-addon-no-namespace').dir, { qunit: assert });
+
+          expectFile('package.json').json('ember-addon.public-assets').deepEquals({
+            './public/thing.txt': '/v2-addon/public/thing.txt',
+          });
+          expectNoNamespaceFile('package.json').json('ember-addon.public-assets').deepEquals({
+            './public/other.txt': '/public/other.txt',
+          });
+        });
       });
 
       Qmodule('Consuming app', function () {