Merge pull request #246 from DazzlingFugu/upgrade-to-eslint-v9

Upgrade ESLint from v8 to v9

.npmignore

@@ -7,8 +7,6 @@
 /.ember-cli
 /.env*
 /.eslintcache
-/.eslintignore
-/.eslintrc.js
 /.git/
 /.github/
 /.gitignore

.prettierrc.js

@@ -3,7 +3,7 @@
 module.exports = {
   overrides: [
     {
-      files: '*.{js,ts}',
+      files: '*.{js,mjs,ts}',
       options: {
         singleQuote: true,
       },

ember-cli-build.js

@@ -50,6 +50,6 @@ module.exports = function (defaults) {
         },
       },
     },
-    /* eslint-disable prettier/prettier */
+    /* eslint-enable prettier/prettier */
   });
 };

eslint.config.mjs

@@ -0,0 +1,109 @@
+import ember from 'eslint-plugin-ember';
+import globals from 'globals';
+import babelParser from '@babel/eslint-parser';
+import js from '@eslint/js';
+
+import pluginEmberRecommended from 'eslint-plugin-ember/configs/recommended';
+import pluginNode from 'eslint-plugin-n';
+import pluginPrettierRecommended from 'eslint-plugin-prettier/recommended';
+import pluginQunitRecommended from 'eslint-plugin-qunit/configs/recommended';
+
+export default [
+  js.configs.recommended,
+  ...pluginEmberRecommended,
+  pluginPrettierRecommended,
+
+  {
+    ignores: [
+      // Unconventional js
+      'blueprints/*/files/',
+
+      // Compiled output
+      'declarations/',
+      'dist/',
+
+      // Misc
+      'coverage/',
+      '!**/.*',
+      '**/.*/',
+
+      // ember-try
+      '.node_modules.ember-try/',
+    ],
+  },
+  {
+    plugins: {
+      ember,
+    },
+
+    languageOptions: {
+      globals: {
+        ...globals.browser,
+      },
+
+      parser: babelParser,
+      ecmaVersion: 'latest',
+      sourceType: 'module',
+
+      parserOptions: {
+        requireConfigFile: false,
+
+        babelOptions: {
+          plugins: [
+            [
+              '@babel/plugin-proposal-decorators',
+              {
+                decoratorsBeforeExport: true,
+              },
+            ],
+          ],
+        },
+      },
+    },
+
+    rules: {},
+  },
+  {
+    ...pluginNode.configs['flat/recommended-script'],
+    files: [
+      '.prettierrc.js',
+      '.stylelintrc.js',
+      '.template-lintrc.js',
+      'ember-cli-build.js',
+      'index.js',
+      'testem.js',
+      'blueprints/*/index.js',
+      'config/**/*.js',
+      'tests/dummy/config/**/*.js',
+    ],
+  },
+  {
+    files: [
+      '.prettierrc.js',
+      '.stylelintrc.js',
+      '.template-lintrc.js',
+      'ember-cli-build.js',
+      'index.js',
+      'testem.js',
+      'blueprints/*/index.js',
+      'config/**/*.js',
+      'tests/dummy/config/**/*.js',
+    ],
+
+    languageOptions: {
+      globals: {
+        ...Object.fromEntries(
+          Object.entries(globals.browser).map(([key]) => [key, 'off']),
+        ),
+        ...globals.node,
+      },
+
+      ecmaVersion: 5,
+      sourceType: 'script',
+    },
+  },
+  {
+    ...pluginQunitRecommended,
+    files: ['tests/**/*-test.{js,ts}'],
+  },
+];

package.json

@@ -66,6 +66,8 @@
     "@ember/string": "^4.0.0",
     "@ember/test-helpers": "^4.0.4",
     "@embroider/test-setup": "^3.0.3",
+    "@eslint/eslintrc": "^3.2.0",
+    "@eslint/js": "^9.15.0",
     "@glimmer/component": "^1.1.2",
     "@glimmer/tracking": "^1.1.2",
     "broccoli-asset-rev": "^3.0.0",
@@ -84,12 +86,13 @@
     "ember-source-channel-url": "^3.0.0",
     "ember-template-lint": "^5.13.0",
     "ember-try": "^3.0.0",
-    "eslint": "^8.57.0",
+    "eslint": "^9.15.0",
     "eslint-config-prettier": "^9.1.0",
-    "eslint-plugin-ember": "^12.2.0",
-    "eslint-plugin-n": "^16.6.2",
-    "eslint-plugin-prettier": "^5.1.3",
+    "eslint-plugin-ember": "^12.3.3",
+    "eslint-plugin-n": "^17.14.0",
+    "eslint-plugin-prettier": "^5.2.1",
     "eslint-plugin-qunit": "^8.1.1",
+    "globals": "^15.12.0",
     "loader.js": "^4.7.0",
     "prettier": "^3.2.5",
     "qunit": "^2.20.1",