Feat/lightningcss (#6427)

* Added lightning css for minification of css

* Added esbuild for minification

* Upgraded to Node 22

* Fixed.

* Temporary change branch

* Rebased changes.

.github/workflows/backend-tests.yml

@@ -24,7 +24,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node: [18, 20, 21]
+        node: [18, 20, 22]
     steps:
       -
         name: Checkout repository
@@ -81,7 +81,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node: [18, 20, 21]
+        node: [18, 20, 22]
     steps:
       -
         name: Checkout repository
@@ -211,7 +211,7 @@ jobs:
       -
         uses: actions/setup-node@v4
         with:
-          node-version: 21
+          node-version: 22
       - uses: pnpm/action-setup@v4
         name: Install pnpm
         with:

.github/workflows/frontend-admin-tests.yml

@@ -18,7 +18,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node: [20, 21]
+        node: [20, 22]
 
     steps:
       -

.github/workflows/frontend-tests.yml

@@ -26,7 +26,7 @@ jobs:
       -
         uses: actions/setup-node@v4
         with:
-          node-version: 21
+          node-version: 22
       - uses: pnpm/action-setup@v4
         name: Install pnpm
         with:
@@ -92,7 +92,7 @@ jobs:
         uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 21
+          node-version: 22
       - uses: pnpm/action-setup@v4
         name: Install pnpm
         with:
@@ -159,7 +159,7 @@ jobs:
       -
         uses: actions/setup-node@v4
         with:
-          node-version: 21
+          node-version: 22
       - uses: pnpm/action-setup@v4
         name: Install pnpm
         with:

.github/workflows/upgrade-from-latest-release.yml

@@ -24,13 +24,13 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node: [18, 20, 21]
+        node: [18, 20, 22]
     steps:
       -
         name: Check out latest release
         uses: actions/checkout@v4
         with:
-          ref: master
+          ref: develop #FIXME change to master when doing release
       -
         uses: actions/setup-node@v4
         with:

.github/workflows/windows.yml

@@ -34,7 +34,7 @@ jobs:
       -
         uses: actions/setup-node@v4
         with:
-          node-version: 21
+          node-version: 22
       - uses: pnpm/action-setup@v4
         name: Install pnpm
         with:

src/node/utils/MinifyWorker.js

@@ -3,31 +3,45 @@
  * Worker thread to minify JS & CSS files out of the main NodeJS thread
  */
 
-const CleanCSS = require('clean-css');
-const Terser = require('terser');
 const fsp = require('fs').promises;
-const path = require('path');
-const Threads = require('threads');
+import path from 'node:path'
+import {expose} from 'threads'
+import lightminify from 'lightningcss'
+import {transform} from 'esbuild';
 
-const compressJS = (content) => Terser.minify(content);
+/*
+  * Minify JS content
+  * @param {string} content - JS content to minify
+ */
+const compressJS = async (content) => {
+  return await transform(content, {minify: true});
+}
 
+/*
+  * Minify CSS content
+  * @param {string} filename - name of the file
+  * @param {string} ROOT_DIR - the root dir of Etherpad
+ */
 const compressCSS = async (filename, ROOT_DIR) => {
   const absPath = path.resolve(ROOT_DIR, filename);
   try {
     const basePath = path.dirname(absPath);
-    const output = await new CleanCSS({
-      rebase: true,
-      rebaseTo: basePath,
-    }).minify([absPath]);
-    return output.styles;
+    const file = await fsp.readFile(absPath, 'utf8');
+    let { code } = lightminify.transform({
+      errorRecovery: true,
+      filename: basePath,
+      minify: true,
+      code: Buffer.from(file, 'utf8')
+    });
+    return code.toString();
   } catch (error) {
     // on error, just yield the un-minified original, but write a log message
-    console.error(`Unexpected error minifying ${filename} (${absPath}): ${error}`);
+    console.error(`Unexpected error minifying ${filename} (${absPath}): ${JSON.stringify(error)}`);
     return await fsp.readFile(absPath, 'utf8');
   }
 };
 
-Threads.expose({
-  compressJS,
+expose({
+  compressJS: compressJS,
   compressCSS,
 });

src/package.json

@@ -32,7 +32,6 @@
   "dependencies": {
     "async": "^3.2.5",
     "axios": "^1.7.2",
-    "clean-css": "^5.3.3",
     "cookie-parser": "^1.4.6",
     "cross-spawn": "^7.0.3",
     "ejs": "^3.1.10",
@@ -51,9 +50,11 @@
     "jsonminify": "0.4.2",
     "jsonwebtoken": "^9.0.2",
     "languages4translatewiki": "0.1.3",
+    "lightningcss": "^1.25.1",
     "live-plugin-manager": "^1.0.0",
     "lodash.clonedeep": "4.5.0",
     "log4js": "^6.9.1",
+    "lru-cache": "^10.2.0",
     "measured-core": "^2.0.0",
     "mime-types": "^2.1.35",
     "oidc-provider": "^8.4.5",
@@ -68,15 +69,13 @@
     "socket.io": "^4.7.5",
     "socket.io-client": "^4.7.5",
     "superagent": "^9.0.2",
-    "terser": "^5.30.3",
     "threads": "^1.7.0",
     "tinycon": "0.6.8",
     "tsx": "^4.11.2",
     "ueberdb2": "^4.2.63",
     "underscore": "1.13.6",
     "unorm": "1.6.0",
-    "wtfnode": "^0.9.2",
-    "lru-cache": "^10.2.0"
+    "wtfnode": "^0.9.2"
   },
   "bin": {
     "etherpad-healthcheck": "../bin/etherpad-healthcheck",
@@ -97,6 +96,7 @@
     "@types/sinon": "^17.0.3",
     "@types/supertest": "^6.0.2",
     "@types/underscore": "^1.11.15",
+    "esbuild": "^0.21.4",
     "eslint": "^9.2.0",
     "eslint-config-etherpad": "^4.0.4",
     "etherpad-cli-client": "^3.0.2",