eslint/vue: tweak WebpackConfig#enableEslintLoader()

Author: Kocal

lib/WebpackConfig.js

@@ -133,6 +133,9 @@ class WebpackConfig {
         this.vueOptions = {
             useJsx: false,
         };
+        this.eslintOptions = {
+            lintVue: false,
+        };
 
         // Features/Loaders options callbacks
         this.postCssLoaderOptionsCallback = () => {};
@@ -686,31 +689,33 @@ class WebpackConfig {
         this.vueOptions = vueOptions;
     }
 
-    enableEslintLoader(eslintLoaderOptionsOrCallback = () => {}) {
+    enableEslintLoader(eslintLoaderOptionsOrCallback = () => {}, eslintOptions = {}) {
         this.useEslintLoader = true;
 
         if (typeof eslintLoaderOptionsOrCallback === 'function') {
             this.eslintLoaderOptionsCallback = eslintLoaderOptionsOrCallback;
-            return;
-        }
-
-        if (typeof eslintLoaderOptionsOrCallback === 'string') {
+        } else if (typeof eslintLoaderOptionsOrCallback === 'string') {
             logger.deprecation('enableEslintLoader: Extending from a configuration is deprecated, please use a configuration file instead. See https://eslint.org/docs/user-guide/configuring for more information.');
 
             this.eslintLoaderOptionsCallback = (options) => {
                 options.extends = eslintLoaderOptionsOrCallback;
             };
-            return;
-        }
-
-        if (typeof eslintLoaderOptionsOrCallback === 'object') {
+        } else if (typeof eslintLoaderOptionsOrCallback === 'object') {
             this.eslintLoaderOptionsCallback = (options) => {
                 Object.assign(options, eslintLoaderOptionsOrCallback);
             };
-            return;
+        } else {
+            throw new Error('Argument 1 to enableEslintLoader() must be either a string, object or callback function.');
+        }
+
+        // Check allowed keys
+        for (const key of Object.keys(eslintOptions)) {
+            if (!(key in this.eslintOptions)) {
+                throw new Error(`"${key}" is not a valid key for enableEslintLoader(). Valid keys: ${Object.keys(this.eslintOptions).join(', ')}.`);
+            }
         }
 
-        throw new Error('Argument 1 to enableEslintLoader() must be either a string, object or callback function.');
+        this.eslintOptions = eslintOptions;
     }
 
     enableBuildNotifications(enabled = true, notifierPluginOptionsCallback = () => {}) {

test/WebpackConfig.js

@@ -1277,4 +1277,16 @@ describe('WebpackConfig object', () => {
             expect(() => config.enableIntegrityHashes(true, ['sha1', 'foo', 'sha256'])).to.throw('Invalid hash algorithm "foo"');
         });
     });
+
+    describe('enableEslintLoader', () => {
+        it('Should validate Encore-specific options', () => {
+            const config = createConfig();
+
+            expect(() => {
+                config.enableEslintLoader(() => {}, {
+                    notExisting: false,
+                });
+            }).to.throw('"notExisting" is not a valid key for enableEslintLoader(). Valid keys: lintVue.');
+        });
+    });
 });