Create addon-dev package

.eslintignore

@@ -20,6 +20,8 @@
 /packages/test-setup/**/*.d.ts
 /packages/addon-shim/**/*.js
 /packages/addon-shim/**/*.d.ts
+/packages/addon-dev/**/*.js
+/packages/addon-dev/**/*.d.ts
 /tests/fixtures/
 
 # unconventional js

packages/addon-dev/.eslintignore

@@ -0,0 +1,7 @@
+# compiled output
+/src/**/*.js
+/src/**/*.d.ts
+
+# dependencies
+/node_modules/
+

packages/addon-dev/.gitignore

@@ -0,0 +1,10 @@
+# See https://help.github.com/ignore-files/ for more about ignoring files.
+
+# compiled output
+/src/**/*.js
+/src/**/*.d.ts
+/src/**/*.map
+
+# dependencies
+/node_modules/
+

packages/addon-dev/.prettierrc.js

@@ -0,0 +1,5 @@
+'use strict';
+
+module.exports = {
+  singleQuote: true,
+};

packages/addon-dev/README.md

@@ -0,0 +1,34 @@
+# @embroider/addon-dev
+
+Utilities for working on v2 addons.
+
+## Rollup Utilities
+
+`@embroider/addon-dev/rollup` exports utilities for building addons with rollup. To use them:
+
+1. Add the following `devDependencies` to your addon:
+
+   - @embroider/addon-dev
+   - rollup
+   - @babel/core
+   - @rollup/plugin-babel
+
+2. Copy the `./sample-rollup.config.js` in this repo to your own `rollup.config.js`.
+
+## addon-dev command
+
+The `addon-dev` command helps with common tasks in v2 addons.
+
+- linking up a test application that is embedded within your addon's repo
+- synchronizing `devDependencies` from an embedded test application out into
+  your addon's actual package.json
+
+(You can avoid the need for both of these if you keep your addon and its test app as separate packages in a monorepo instead.)
+
+## Contributing
+
+See the top-level CONTRIBUTING.md in this monorepo.
+
+## License
+
+This project is licensed under the MIT License.

packages/addon-dev/package.json

@@ -0,0 +1,41 @@
+{
+  "name": "@embroider/addon-dev",
+  "version": "0.45.0",
+  "description": "Utilities for addon authors",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/embroider-build/embroider.git",
+    "directory": "packages/addon-dev"
+  },
+  "license": "MIT",
+  "author": "Edward Faulkner <edward@eaf4.com>",
+  "bin": {
+    "addon-dev": "./src/commands.js"
+  },
+  "exports": {
+    "./template-colocation-plugin": "./src/template-colocation-plugin.js",
+    "./rollup": "./src/rollup.js"
+  },
+  "dependencies": {
+    "@embroider/shared-internals": "^0.45.0",
+    "@rollup/pluginutils": "^4.1.1",
+    "fs-extra": "^10.0.0",
+    "minimatch": "^3.0.4",
+    "rollup-plugin-copy-assets": "^2.0.3",
+    "rollup-plugin-delete": "^2.0.0",
+    "walk-sync": "^3.0.0",
+    "yargs": "^17.0.1"
+  },
+  "devDependencies": {
+    "@types/fs-extra": "^9.0.12",
+    "@types/minimatch": "^3.0.4",
+    "@types/yargs": "^17.0.3",
+    "rollup": "^2.58.0"
+  },
+  "engines": {
+    "node": "12.* || 14.* || >= 16"
+  },
+  "volta": {
+    "extends": "../../package.json"
+  }
+}

packages/addon-dev/sample-rollup.config.js

@@ -0,0 +1,41 @@
+import babel from '@rollup/plugin-babel';
+import { Addon } from '@embroider/addon-dev/rollup';
+
+const addon = new Addon({
+  srcDir: 'src',
+  destDir: 'dist',
+});
+
+export default {
+  // This provides defaults that work well alongside `publicEntrypoints` below.
+  // You can augment this if you need to.
+  output: addon.output(),
+
+  plugins: [
+    // These are the modules that users should be able to import from your
+    // addon. Anything not listed here may get optimized away.
+    addon.publicEntrypoints(['components/**/*.js', 'index.js']),
+
+    // These are the modules that should get reexported into the traditional
+    // "app" tree. Things in here should also be in publicEntrypoints above, but
+    // not everything in publicEntrypoints necessarily needs to go here.
+    addon.appReexports(['components/welcome-page.js']),
+
+    // This babel config should *not* apply presets or compile away ES modules.
+    // It exists only to provide development niceties for you, like automatic
+    // template colocation.
+    babel({
+      plugins: ['@embroider/addon-dev/template-colocation-plugin'],
+    }),
+
+    // Ensure that standalone .hbs files are properly integrated as Javascript.
+    addon.hbs(),
+
+    // addons are allowed to contain imports of .css files, which we want rollup
+    // to leave alone and keep in the published output.
+    addon.keepAssets(['**/*.css']),
+
+    // Remove leftover build artifacts when starting a new build.
+    addon.clean(),
+  ],
+};

packages/addon-shim/src/commands.ts → packages/addon-dev/src/commands.ts

@@ -20,7 +20,7 @@ function commonArgs(yargs: Argv) {
 }
 
 yargs(process.argv.slice(2))
-  .scriptName('addon-shim')
+  .scriptName('addon-dev')
   .command(
     'link-test-app',
     'Ensures that a test app (that lives a subdir under an addon) has access to the addon and all appropriate deps',

packages/addon-dev/src/rollup-app-reexports.ts

@@ -0,0 +1,31 @@
+import { readJsonSync, writeJsonSync } from 'fs-extra';
+import minimatch from 'minimatch';
+import type { Plugin } from 'rollup';
+
+export default function appReexports(opts: {
+  from: string;
+  to: string;
+  include: string[];
+}): Plugin {
+  return {
+    name: 'app-reexports',
+    generateBundle(_, bundle) {
+      let pkg = readJsonSync('package.json');
+      let appJS: Record<string, string> = {};
+      for (let filename of Object.keys(bundle)) {
+        if (opts.include.some((glob) => minimatch(filename, glob))) {
+          appJS[`./${filename}`] = `./dist/_app_/${filename}`;
+          this.emitFile({
+            type: 'asset',
+            fileName: `_app_/${filename}`,
+            source: `export { default } from "${pkg.name}/${filename}";\n`,
+          });
+        }
+      }
+      pkg['ember-addon'] = Object.assign({}, pkg['ember-addon'], {
+        'app-js': appJS,
+      });
+      writeJsonSync('package.json', pkg, { spaces: 2 });
+    },
+  };
+}

packages/addon-dev/src/rollup-hbs-plugin.ts

@@ -0,0 +1,23 @@
+import { createFilter } from '@rollup/pluginutils';
+import type { Plugin } from 'rollup';
+import { readFileSync } from 'fs';
+const backtick = '`';
+
+export default function rollupHbsPlugin(): Plugin {
+  const filter = createFilter('**/*.hbs');
+
+  return {
+    name: 'rollup-hbs-plugin',
+    load(id: string) {
+      if (!filter(id)) return;
+      let input = readFileSync(id, 'utf8');
+      let code =
+        `import { hbs } from 'ember-cli-htmlbars';\n` +
+        `export default hbs${backtick}${input}${backtick};`;
+      return {
+        code,
+        id: id + '.js',
+      };
+    },
+  };
+}

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

@@ -0,0 +1,48 @@
+import walkSync from 'walk-sync';
+import type { Plugin } from 'rollup';
+import { readFileSync } from 'fs';
+import { join } from 'path';
+import minimatch from 'minimatch';
+
+export default function keepAssets({
+  from,
+  include,
+}: {
+  from: string;
+  include: string[];
+}): Plugin {
+  return {
+    name: 'copy-assets',
+
+    // imports of assets should be left alone in the source code. This can cover
+    // the case of .css as defined in the embroider v2 addon spec.
+    async resolveId(source, importer, options) {
+      const resolution = await this.resolve(source, importer, {
+        skipSelf: true,
+        ...options,
+      });
+      if (
+        resolution &&
+        include.some((pattern) => minimatch(resolution.id, pattern))
+      ) {
+        return { id: source, external: true };
+      }
+      return resolution;
+    },
+
+    // the assets go into the output directory in the same relative locations as
+    // in the input directory
+    async generateBundle() {
+      for (let name of walkSync(from, {
+        globs: include,
+        directories: false,
+      })) {
+        this.emitFile({
+          type: 'asset',
+          fileName: name,
+          source: readFileSync(join(from, name), 'utf8'),
+        });
+      }
+    },
+  };
+}

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

@@ -0,0 +1,23 @@
+import walkSync from 'walk-sync';
+import type { Plugin } from 'rollup';
+import { join } from 'path';
+
+export default function publicEntrypoints(args: {
+  srcDir: string;
+  include: string[];
+}): Plugin {
+  return {
+    name: 'addon-modules',
+    buildStart() {
+      for (let name of walkSync(args.srcDir, {
+        globs: args.include,
+      })) {
+        this.emitFile({
+          type: 'chunk',
+          id: join(args.srcDir, name),
+          fileName: name,
+        });
+      }
+    },
+  };
+}

packages/addon-dev/src/rollup.ts

@@ -0,0 +1,66 @@
+import { default as hbs } from './rollup-hbs-plugin';
+import { default as publicEntrypoints } from './rollup-public-entrypoints';
+import { default as appReexports } from './rollup-app-reexports';
+import { default as clean } from 'rollup-plugin-delete';
+import { default as keepAssets } from './rollup-keep-assets';
+import type { Plugin } from 'rollup';
+
+export class Addon {
+  #srcDir: string;
+  #destDir: string;
+
+  constructor(params: { srcDir?: string; destDir?: string } = {}) {
+    this.#srcDir = params.srcDir ?? 'src';
+    this.#destDir = params.destDir ?? 'dist';
+  }
+
+  // Given a list of globs describing modules in your srcDir, this generates
+  // corresponding appTree modules that contain reexports, and updates your
+  // package.json metadata to list them all.
+  appReexports(patterns: string[]): Plugin {
+    return appReexports({
+      from: this.#srcDir,
+      to: this.#destDir,
+      include: patterns,
+    });
+  }
+
+  // This configures rollup to emit public entrypoints for each module in your
+  // srcDir that matches one of the given globs. Typical addons will want to
+  // match patterns like "components/**/*.js", "index.js", and "test-support.js".
+  publicEntrypoints(patterns: string[]) {
+    return publicEntrypoints({ srcDir: this.#srcDir, include: patterns });
+  }
+
+  // This wraps standalone .hbs files as Javascript files using inline
+  // templates. This means special resolving rules for .hbs files aren't
+  // required for javascript tooling to understand your package.
+  hbs() {
+    return hbs();
+  }
+
+  // By default rollup does not clear the output directory between builds. This
+  // does that.
+  clean() {
+    return clean({ targets: `${this.#destDir}/*` });
+  }
+
+  // V2 Addons are allowed to contain imports of .css files. This tells rollup
+  // to leave those imports alone and to make sure the corresponding .css files
+  // are kept in the same relative locations in the destDir as they were in the
+  // srcDir.
+  keepAssets(patterns: string[]) {
+    return keepAssets({
+      from: this.#srcDir,
+      include: patterns,
+    });
+  }
+
+  // This is the default `output` configuration you should pass to rollup. We're
+  // emitting ES modules, in your `destDir`, and their filenames are equal to
+  // their bundle names (the bundle names get generated by `publicEntrypoints`
+  // above).
+  output() {
+    return { dir: this.#destDir, format: 'es', entryFileNames: '[name]' };
+  }
+}

packages/addon-dev/src/template-colocation-plugin.ts

@@ -0,0 +1,4 @@
+export {
+  default,
+  Options,
+} from '@embroider/shared-internals/src/template-colocation-plugin';

packages/addon-shim/addon-main.js

@@ -9,8 +9,4 @@ module.exports = {
       .find((a) => a.name === 'ember-auto-import')
       .registerV2Addon(this.parent.name, this.parent.pkg.root);
   },
-
-  includedCommands() {
-    return require('./src/commands').default;
-  },
 };

packages/addon-shim/package.json

@@ -17,23 +17,16 @@
     "doc": "doc",
     "test": "tests"
   },
-  "bin": {
-    "addon-shim": "./src/commands.js"
-  },
   "scripts": {
     "prepare": "tsc"
   },
   "dependencies": {
     "@embroider/shared-internals": "^0.45.0",
     "ember-auto-import": "^2.2.0",
-    "fs-extra": "^10.0.0",
-    "semver": "^7.3.5",
-    "yargs": "^17.0.1"
+    "semver": "^7.3.5"
   },
   "devDependencies": {
-    "@types/fs-extra": "^9.0.12",
     "@types/semver": "^7.3.6",
-    "@types/yargs": "^17.0.2",
     "typescript": "*",
     "webpack": "^5"
   },