Build Tools: Restore license headers for CodeMirror JS and CSS.

westonruter · gemini-code-assist[bot] · westonruter · commit 2fb47e41d624 · 2026-01-22T18:41:05.000-08:00
Adds the required license header to the minified CodeMirror bundles during the build process.

- Updates tools/webpack/codemirror.config.js to include the license header using BannerPlugin and ensures Terser preserves important comments.
- Adds a usebanner:codemirror task to Gruntfile.js to append the license header to the minified CSS.
- Dynamically retrieves the CodeMirror version from package.json for inclusion in the header.
- Reformats the license headers to use multi-line backtick string literals for better maintainability.

Co-authored-by: gemini-code-assist[bot] &lt;176961590+gemini-code-assist[bot]@users.noreply.github.com&gt;
diff --git a/Gruntfile.js b/Gruntfile.js
@@ -1,10 +1,12 @@
 /* jshint node:true */
 /* jshint esversion: 6 */
+/* eslint-env es6 */
 /* globals Set */
 var webpackConfig = require( './webpack.config' );
 var installChanged = require( 'install-changed' );
 
 module.exports = function(grunt) {
+	var pkg = grunt.file.readJSON( 'package.json' );
 	var path = require('path'),
 		fs = require( 'fs' ),
 		glob = require( 'glob' ),
@@ -173,7 +175,27 @@ module.exports = function(grunt) {
 			options: {
 				position: 'top',
 				banner: BANNER_TEXT,
-				linebreak: true
+				linebreak: false
+			},
+			codemirror: {
+				options: {
+					banner: `/*! This file is auto-generated from CodeMirror - v${ pkg.dependencies.codemirror }\n` +
+						`\n` +
+						`CodeMirror, copyright (c) by Marijn Haverbeke and others\n` +
+						`Distributed under an MIT license: http://codemirror.net/LICENSE\n` +
+						`\n` +
+						`This is CodeMirror (http://codemirror.net), a code editor\n` +
+						`implemented in JavaScript on top of the browser's DOM.\n` +
+						`\n` +
+						`You can find some technical background for some of the code below\n` +
+						`at http://marijnhaverbeke.nl/blog/#cm-internals .\n` +
+						`*/`
+				},
+				files: {
+					src: [
+						WORKING_DIR + 'wp-includes/js/codemirror/codemirror.min.css'
+					]
+				}
 			},
 			files: {
 				src: [
@@ -1705,6 +1727,7 @@ module.exports = function(grunt) {
 		'webpack:codemirror',
 		'concat:codemirror',
 		'cssmin:codemirror',
+		'usebanner:codemirror',
 		'copy:codemirror'
 	] );
 
diff --git a/tools/webpack/codemirror.config.js b/tools/webpack/codemirror.config.js
@@ -1,5 +1,7 @@
 const path = require( 'path' );
+const webpack = require( 'webpack' );
 const TerserPlugin = require( 'terser-webpack-plugin' );
+const pkg = require( '../../package.json' );
 
 const config = {
 	mode: 'production',
@@ -14,13 +16,30 @@ const config = {
 			new TerserPlugin( {
 				terserOptions: {
 					format: {
-						comments: false,
+						comments: /^\!/,
 					},
 				},
 				extractComments: false,
 			} ),
 		],
 	},
+	plugins: [
+		new webpack.BannerPlugin( {
+			banner: `/*! This file is auto-generated from CodeMirror - v${ pkg.dependencies.codemirror }\n` +
+				`\n` +
+				`CodeMirror, copyright (c) by Marijn Haverbeke and others\n` +
+				`Distributed under an MIT license: http://codemirror.net/LICENSE\n` +
+				`\n` +
+				`This is CodeMirror (http://codemirror.net), a code editor\n` +
+				`implemented in JavaScript on top of the browser's DOM.\n` +
+				`\n` +
+				`You can find some technical background for some of the code below\n` +
+				`at http://marijnhaverbeke.nl/blog/#cm-internals .\n` +
+				`*/\n`,
+			raw: true,
+			entryOnly: true,
+		} ),
+	],
 };
 
 module.exports = config;
