Replace clean-webpack-plugin with the core output cleaning feature

index.js

@@ -1491,7 +1491,7 @@ class Encore {
     /**
      * If enabled, the output directory is emptied between each build (to remove old files).
      *
-     * A list of available options can be found at https://github.com/johnagan/clean-webpack-plugin
+     * A list of available options can be found at https://webpack.js.org/configuration/output/#outputclean
      *
      * For example:
      *

lib/config-generator.js

@@ -28,7 +28,6 @@ const deleteUnusedEntriesPluginUtil = require('./plugins/delete-unused-entries')
 const entryFilesManifestPlugin = require('./plugins/entry-files-manifest');
 const manifestPluginUtil = require('./plugins/manifest');
 const variableProviderPluginUtil = require('./plugins/variable-provider');
-const cleanPluginUtil = require('./plugins/clean');
 const definePluginUtil = require('./plugins/define');
 const terserPluginUtil = require('./plugins/terser');
 const optimizeCssAssetsUtil = require('./plugins/optimize-css-assets');
@@ -40,6 +39,7 @@ const PluginPriorities = require('./plugins/plugin-priorities');
 const applyOptionsCallback = require('./utils/apply-options-callback');
 const copyEntryTmpName = require('./utils/copyEntryTmpName');
 const getVueVersion = require('./utils/get-vue-version');
+const multimatch = require('multimatch');
 const tmp = require('tmp');
 const fs = require('fs');
 const path = require('path');
@@ -244,6 +244,7 @@ class ConfigGenerator {
         }
 
         return {
+            clean: this.buildCleanConfig(),
             path: this.webpackConfig.outputPath,
             filename: filename,
             // default "asset module" filename
@@ -256,6 +257,26 @@ class ConfigGenerator {
         };
     }
 
+    /**
+     * @returns {import('webpack').CleanOptions|boolean}
+     */
+    buildCleanConfig() {
+        if (!this.webpackConfig.cleanupOutput) {
+            return false;
+        }
+
+        const cleanedPaths = [].concat(this.webpackConfig.cleanWebpackPluginPaths);
+        // works around a bug where manifest.json is emitted when
+        // using dev-server... but then CleanWebpackPlugin deletes it
+        cleanedPaths.push('!manifest.json');
+
+        const cleanConfig = {
+            keep: (path)=> multimatch(path, cleanedPaths).length === 0
+        };
+
+        return applyOptionsCallback(this.webpackConfig.cleanWebpackPluginOptionsCallback, cleanConfig);
+    }
+
     buildRulesConfig() {
         const applyRuleConfigurationCallback = (name, defaultRules) => {
             return applyOptionsCallback(this.webpackConfig.loaderConfigurationCallbacks[name], defaultRules);
@@ -457,8 +478,6 @@ class ConfigGenerator {
 
         variableProviderPluginUtil(plugins, this.webpackConfig);
 
-        cleanPluginUtil(plugins, this.webpackConfig);
-
         definePluginUtil(plugins, this.webpackConfig);
 
         notifierPluginUtil(plugins, this.webpackConfig);

lib/plugins/plugin-priorities.js

@@ -15,7 +15,6 @@ module.exports = {
     WebpackManifestPlugin: 120,
     LoaderOptionsPlugin: 110,
     ProvidePlugin: 90,
-    CleanWebpackPlugin: 80,
     DefinePlugin: 70,
     WebpackNotifier: 60,
     VueLoaderPlugin: 50,

package.json

@@ -31,11 +31,11 @@
     "assets-webpack-plugin": "7.0.*",
     "babel-loader": "^9.1.3",
     "chalk": "^4.0.0",
-    "clean-webpack-plugin": "^4.0.0",
     "css-loader": "^6.7.0",
     "css-minimizer-webpack-plugin": "^5.0.0",
     "fastest-levenshtein": "^1.0.16",
     "mini-css-extract-plugin": "^2.6.0",
+    "multimatch": "^5",
     "pretty-error": "^4.0.0",
     "resolve-url-loader": "^5.0.0",
     "semver": "^7.3.2",

test/config-generator.js

@@ -15,7 +15,6 @@ const RuntimeConfig = require('../lib/config/RuntimeConfig');
 const configGenerator = require('../lib/config-generator');
 const MiniCssExtractPlugin = require('mini-css-extract-plugin');
 const { WebpackManifestPlugin } = require('../lib/webpack-manifest-plugin');
-const { CleanWebpackPlugin } = require('clean-webpack-plugin');
 const webpack = require('webpack');
 const path = require('path');
 const logger = require('../lib/logger');
@@ -534,7 +533,7 @@ describe('The config-generator function', () => {
         });
     });
 
-    describe('cleanupOutputBeforeBuild() adds CleanWebpackPlugin', () => {
+    describe('cleanupOutputBeforeBuild() configures output cleaning', () => {
         it('without cleanupOutputBeforeBuild()', () => {
             const config = createConfig();
             config.outputPath = '/tmp/output/public-path';
@@ -543,8 +542,7 @@ describe('The config-generator function', () => {
 
             const actualConfig = configGenerator(config);
 
-            const cleanPlugin = findPlugin(CleanWebpackPlugin, actualConfig.plugins);
-            expect(cleanPlugin).to.be.undefined;
+            expect(actualConfig.output.clean).to.be.false;
         });
 
         it('with cleanupOutputBeforeBuild()', () => {
@@ -556,8 +554,7 @@ describe('The config-generator function', () => {
 
             const actualConfig = configGenerator(config);
 
-            const cleanPlugin = findPlugin(CleanWebpackPlugin, actualConfig.plugins);
-            expect(cleanPlugin).to.not.be.undefined;
+            expect(actualConfig.output.clean).to.be.haveOwnProperty('keep');
         });
     });