Migrate the repository tooling to Rolldown and isolated declarations.

.circleci/template.yml

@@ -108,6 +108,9 @@ jobs:
       - run:
           name: Validate versions of dependencies
           command: pnpm run check-versions-match
+      - run:
+          name: Type check the project
+          command: pnpm run typecheck
       - run:
           name: Execute tests for internal scripts
           command: pnpm run test:scripts

package.json

@@ -30,7 +30,9 @@
     "lint-staged": "^16.4.0",
     "listr2": "^8.3.3",
     "minimist": "^1.2.8",
+    "oxc-transform": "^0.112.0",
     "semver": "^7.7.4",
+    "typescript": "5.5.4",
     "upath": "^2.0.1",
     "vite": ">=7.3.2 <8",
     "vitest": "^4.1.2"
@@ -46,6 +48,7 @@
     "release:prepare-packages": "node ./scripts/preparepackages.js",
     "release:publish-packages": "node ./scripts/publishpackages.js",
     "lint": "eslint --concurrency=4",
+    "typecheck": "tsc",
     "precommit": "lint-staged",
     "reinstall": "pnpx rimraf --glob \"**/node_modules\" && pnpm install",
     "check-dependencies": "ckeditor5-dev-dependency-checker"

packages/ckeditor5-dev-build-tools/package.json

@@ -53,13 +53,13 @@
     "@types/css": "^0.0.38",
     "@types/node": "^22.19.17",
     "@vitest/coverage-v8": "^4.1.2",
+    "rolldown": "^1.0.0",
     "type-fest": "^4.41.0",
-    "typescript": "5.5.4",
     "vitest": "^4.1.2"
   },
   "scripts": {
-    "build": "rollup -c rollup.config.js --forceExit",
-    "dev": "rollup -c rollup.config.js --watch",
+    "build": "rolldown -c rolldown.config.js",
+    "dev": "rolldown -c rolldown.config.js --watch",
     "test": "vitest run --config vitest.config.ts",
     "coverage": "vitest run --config vitest.config.ts --coverage",
     "test:dev": "vitest dev"

packages/ckeditor5-dev-build-tools/rolldown.config.js

@@ -0,0 +1,28 @@
+/**
+ * @license Copyright (c) 2003-2026, CKSource Holding sp. z o.o. All rights reserved.
+ * For licensing, see LICENSE.md.
+ */
+
+import { defineConfig } from 'rolldown';
+import { declarationFilesPlugin } from '../../scripts/plugin-declarations.js';
+import pkg from './package.json' with { type: 'json' };
+
+const externals = [
+	...Object.keys( pkg.dependencies || {} ),
+	...Object.keys( pkg.peerDependencies || {} )
+];
+
+export default defineConfig( {
+	input: 'src/index.ts',
+	platform: 'node',
+	output: {
+		cleanDir: true,
+		format: 'esm',
+		dir: 'dist',
+		assetFileNames: '[name][extname]'
+	},
+	plugins: [
+		declarationFilesPlugin()
+	],
+	external: id => externals.some( name => id.startsWith( name ) )
+} );

packages/ckeditor5-dev-build-tools/tests/config/config.test.ts

@@ -6,6 +6,7 @@
 import { test, expect } from 'vitest';
 import { getRollupConfig } from '../../src/config.js';
 import { mockGetUserDependency } from '../_utils/utils.js';
+import type { Plugin } from 'rollup';
 
 type Options = Parameters<typeof getRollupConfig>[0];
 
@@ -28,7 +29,7 @@ const defaults: Options = {
 	cwd: ''
 };
 
-function getConfig( config: Partial<Options> = {} ) {
+function getConfig( config: Partial<Options> = {} ): ReturnType<typeof getRollupConfig> {
 	return getRollupConfig( Object.assign( {}, defaults, config ) );
 }
 
@@ -53,9 +54,9 @@ test( '--tsconfig', async () => {
 		declarations: false
 	} );
 
-	expect( fileExists.plugins.some( plugin => plugin?.name === 'typescript' ) ).toBe( true );
-	expect( fileDoesntExist.plugins.some( plugin => plugin?.name === 'typescript' ) ).toBe( false );
-	expect( declarationsFalse.plugins.some( plugin => plugin?.name === 'typescript' ) ).toBe( true );
+	expect( ( fileExists.plugins as Array<Plugin> ).some( plugin => plugin?.name === 'typescript' ) ).toBe( true );
+	expect( ( fileDoesntExist.plugins as Array<Plugin> ).some( plugin => plugin?.name === 'typescript' ) ).toBe( false );
+	expect( ( declarationsFalse.plugins as Array<Plugin> ).some( plugin => plugin?.name === 'typescript' ) ).toBe( true );
 } );
 
 test( '--tsconfig should do typechecking regardless of --declarations', async () => {
@@ -68,8 +69,8 @@ test( '--tsconfig should do typechecking regardless of --declarations', async ()
 		declarations: false
 	} );
 
-	expect( withDeclarations.plugins.some( plugin => plugin?.name === 'typescript' ) ).toBe( true );
-	expect( withoutDeclarations.plugins.some( plugin => plugin?.name === 'typescript' ) ).toBe( true );
+	expect( ( withDeclarations.plugins as Array<Plugin> ).some( plugin => plugin?.name === 'typescript' ) ).toBe( true );
+	expect( ( withoutDeclarations.plugins as Array<Plugin> ).some( plugin => plugin?.name === 'typescript' ) ).toBe( true );
 } );
 
 test( '--external', async () => {
@@ -81,22 +82,22 @@ test( '--external', async () => {
 	} );
 
 	// Exclude simple package names.
-	expect( config.external( 'foo' ) ).toBe( true );
+	expect( ( config.external as Function )( 'foo' ) ).toBe( true );
 
 	// Exclude package names that contain a dot (which might be treated as a file extension).
-	expect( config.external( 'socket.io-client' ) ).toBe( true );
+	expect( ( config.external as Function )( 'socket.io-client' ) ).toBe( true );
 
 	// Exclude packages with a code file extension (.ts, .js, .json, etc.).
-	expect( config.external( 'socket.io-client/src/index.js' ) ).toBe( true );
+	expect( ( config.external as Function )( 'socket.io-client/src/index.js' ) ).toBe( true );
 
 	// Don't exclude CSS files.
-	expect( config.external( 'socket.io-client/src/index.css' ) ).toBe( false );
+	expect( ( config.external as Function )( 'socket.io-client/src/index.css' ) ).toBe( false );
 
 	// Don't exclude SVG files.
-	expect( config.external( 'socket.io-client/theme/icon.svg' ) ).toBe( false );
+	expect( ( config.external as Function )( 'socket.io-client/theme/icon.svg' ) ).toBe( false );
 
 	// Don't exclude packages not listed in the "external" option.
-	expect( config.external( 'bar' ) ).toBe( false );
+	expect( ( config.external as Function )( 'bar' ) ).toBe( false );
 } );
 
 test( '--external automatically adds packages that make up the "ckeditor5"', async () => {
@@ -115,10 +116,10 @@ test( '--external automatically adds packages that make up the "ckeditor5"', asy
 		external: [ 'ckeditor5' ]
 	} );
 
-	expect( config.external( 'ckeditor5' ) ).toBe( true );
-	expect( config.external( 'ckeditor5/src/ui.js' ) ).toBe( true );
-	expect( config.external( '@ckeditor/ckeditor5-core' ) ).toBe( true );
-	expect( config.external( '@ckeditor/ckeditor5-code-block/theme/codeblock.css' ) ).toBe( false );
+	expect( ( config.external as Function )( 'ckeditor5' ) ).toBe( true );
+	expect( ( config.external as Function )( 'ckeditor5/src/ui.js' ) ).toBe( true );
+	expect( ( config.external as Function )( '@ckeditor/ckeditor5-core' ) ).toBe( true );
+	expect( ( config.external as Function )( '@ckeditor/ckeditor5-code-block/theme/codeblock.css' ) ).toBe( false );
 } );
 
 test( '--external automatically adds packages that make up the "ckeditor5-premium-features"', async () => {
@@ -138,10 +139,10 @@ test( '--external automatically adds packages that make up the "ckeditor5-premiu
 		external: [ 'ckeditor5-premium-features' ]
 	} );
 
-	expect( config.external( 'ckeditor5-premium-features' ) ).toBe( true );
-	expect( config.external( 'ckeditor5-collaboration/src/collaboration-core.js' ) ).toBe( true );
-	expect( config.external( '@ckeditor/ckeditor5-case-change' ) ).toBe( true );
-	expect( config.external( '@ckeditor/ckeditor5-real-time-collaboration/theme/usermarkers.css' ) ).toBe( false );
+	expect( ( config.external as Function )( 'ckeditor5-premium-features' ) ).toBe( true );
+	expect( ( config.external as Function )( 'ckeditor5-collaboration/src/collaboration-core.js' ) ).toBe( true );
+	expect( ( config.external as Function )( '@ckeditor/ckeditor5-case-change' ) ).toBe( true );
+	expect( ( config.external as Function )( '@ckeditor/ckeditor5-real-time-collaboration/theme/usermarkers.css' ) ).toBe( false );
 } );
 
 test( '--external doesn\'t fail when "ckeditor5-premium-features" is not installed', async () => {
@@ -156,7 +157,7 @@ test( '--external doesn\'t fail when "ckeditor5-premium-features" is not install
 		external: [ 'ckeditor5-premium-features' ]
 	} );
 
-	expect( config.external( 'ckeditor5-premium-features' ) ).toBe( true );
+	expect( ( config.external as Function )( 'ckeditor5-premium-features' ) ).toBe( true );
 } );
 
 test( '--translations', async () => {
@@ -165,8 +166,8 @@ test( '--translations', async () => {
 		translations: '**/*.po'
 	} );
 
-	expect( withoutTranslations.plugins.some( plugin => plugin?.name === 'cke5-translations' ) ).toBe( false );
-	expect( withTranslations.plugins.some( plugin => plugin?.name === 'cke5-translations' ) ).toBe( true );
+	expect( ( withoutTranslations.plugins as Array<Plugin> ).some( plugin => plugin?.name === 'cke5-translations' ) ).toBe( false );
+	expect( ( withTranslations.plugins as Array<Plugin> ).some( plugin => plugin?.name === 'cke5-translations' ) ).toBe( true );
 } );
 
 test( '--minify', async () => {
@@ -175,6 +176,6 @@ test( '--minify', async () => {
 		minify: true
 	} );
 
-	expect( withoutMinification.plugins.some( plugin => plugin?.name === 'terser' ) ).toBe( false );
-	expect( withMinification.plugins.some( plugin => plugin?.name === 'terser' ) ).toBe( true );
+	expect( ( withoutMinification.plugins as Array<Plugin> ).some( plugin => plugin?.name === 'terser' ) ).toBe( false );
+	expect( ( withMinification.plugins as Array<Plugin> ).some( plugin => plugin?.name === 'terser' ) ).toBe( true );
 } );

packages/ckeditor5-dev-changelog/package.json

@@ -38,21 +38,17 @@
     "upath": "^2.0.1"
   },
   "devDependencies": {
-    "@rollup/plugin-node-resolve": "^16.0.3",
-    "@rollup/plugin-typescript": "12.3.0",
     "@types/semver": "^7.7.1",
     "@vitest/coverage-v8": "^4.1.2",
-    "rollup": "^4.60.1",
-    "typescript": "5.5.4",
+    "rolldown": "^1.0.0",
     "vitest": "^4.1.2"
   },
   "scripts": {
-    "build": "rollup -c rollup.config.js --forceExit",
-    "dev": "rollup -c rollup.config.js --watch",
+    "build": "rolldown -c rolldown.config.js",
+    "dev": "rolldown -c rolldown.config.js --watch",
     "test": "vitest run --config vitest.config.ts",
     "coverage": "vitest run --config vitest.config.ts --coverage",
-    "test:dev": "vitest dev",
-    "types": "tsc --noEmit --rootDir ./"
+    "test:dev": "vitest dev"
   },
   "depcheckIgnore": [
     "@vitest/coverage-v8",

packages/ckeditor5-dev-changelog/rolldown.config.js

@@ -0,0 +1,31 @@
+/**
+ * @license Copyright (c) 2003-2026, CKSource Holding sp. z o.o. All rights reserved.
+ * For licensing, see LICENSE.md.
+ */
+
+import { defineConfig } from 'rolldown';
+import { declarationFilesPlugin } from '../../scripts/plugin-declarations.js';
+import pkg from './package.json' with { type: 'json' };
+
+const externals = [
+	...Object.keys( pkg.dependencies || {} ),
+	...Object.keys( pkg.peerDependencies || {} )
+];
+
+export default defineConfig( {
+	input: {
+		index: 'src/index.ts',
+		template: 'src/template.ts'
+	},
+	platform: 'node',
+	output: {
+		cleanDir: true,
+		format: 'esm',
+		dir: 'dist',
+		assetFileNames: '[name][extname]'
+	},
+	external: id => externals.some( name => id.startsWith( name ) ),
+	plugins: [
+		declarationFilesPlugin()
+	]
+} );