Added lightning css for minification of css

src/node/utils/MinifyWorker.js

@@ -1,33 +0,0 @@
-'use strict';
-/**
- * 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');
-
-const compressJS = (content) => Terser.minify(content);
-
-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;
-  } catch (error) {
-    // on error, just yield the un-minified original, but write a log message
-    console.error(`Unexpected error minifying ${filename} (${absPath}): ${error}`);
-    return await fsp.readFile(absPath, 'utf8');
-  }
-};
-
-Threads.expose({
-  compressJS,
-  compressCSS,
-});

src/node/utils/MinifyWorker.ts

@@ -0,0 +1,36 @@
+'use strict';
+/**
+ * Worker thread to minify JS & CSS files out of the main NodeJS thread
+ */
+
+import Terser from 'terser'
+const fsp = require('fs').promises;
+import path from 'node:path'
+import Threads from 'threads'
+import lightminify from 'lightningcss'
+
+const compressJS = (content: string) => Terser.minify(content);
+
+const compressCSS = async (filename: string, ROOT_DIR: string) => {
+  const absPath = path.resolve(ROOT_DIR, filename);
+  try {
+    const basePath = path.dirname(absPath);
+    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}): ${JSON.stringify(error)}`);
+    return await fsp.readFile(absPath, 'utf8');
+  }
+};
+
+Threads.expose({
+  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",
@@ -75,8 +76,7 @@
     "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",