migrate eslint config to new format required since 9.0.0

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

.eslintignore

@@ -1,3 +0,0 @@
-/dist/**
-/coverage/**
-/node_modules/**

.eslintrc.json

@@ -1,24 +0,0 @@
-{
-  "env": {
-    "node": true,
-    "es6": true,
-    "jest": true
-  },
-  "extends": [
-    "eslint:recommended",
-    "plugin:@typescript-eslint/eslint-recommended",
-    "plugin:@typescript-eslint/recommended",
-    "plugin:jest/recommended",
-    "plugin:prettier/recommended"
-  ],
-  "parser": "@typescript-eslint/parser",
-  "parserOptions": {
-    "ecmaVersion": 2023,
-    "sourceType": "module"
-  },
-  "plugins": [
-    "@typescript-eslint",
-    "jest",
-    "prettier"
-  ]
-}

eslint.config.js

@@ -0,0 +1,58 @@
+/* eslint-disable @typescript-eslint/no-require-imports */
+const {defineConfig, globalIgnores} = require('eslint/config');
+const {fixupConfigRules, fixupPluginRules} = require('@eslint/compat');
+const typescriptEslint = require('@typescript-eslint/eslint-plugin');
+const jestPlugin = require('eslint-plugin-jest');
+const prettier = require('eslint-plugin-prettier');
+const globals = require('globals');
+const tsParser = require('@typescript-eslint/parser');
+const js = require('@eslint/js');
+const {FlatCompat} = require('@eslint/eslintrc');
+
+// __dirname and __filename exist natively in CommonJS
+const compat = new FlatCompat({
+  baseDirectory: __dirname,
+  recommendedConfig: js.configs.recommended,
+  allConfig: js.configs.all
+});
+
+module.exports = defineConfig([
+  globalIgnores(['dist/**/*', 'coverage/**/*', 'node_modules/**/*']),
+  {
+    // prettier-ignore
+    extends: fixupConfigRules(
+      compat.extends(
+        'eslint:recommended',
+        'plugin:@typescript-eslint/eslint-recommended',
+        'plugin:@typescript-eslint/recommended',
+        'plugin:jest/recommended',
+        'plugin:prettier/recommended'
+      )
+    ),
+
+    plugins: {
+      '@typescript-eslint': fixupPluginRules(typescriptEslint),
+      jest: fixupPluginRules(jestPlugin),
+      prettier: fixupPluginRules(prettier)
+    },
+
+    languageOptions: {
+      globals: {
+        ...globals.node,
+        ...globals.jest
+      },
+      parser: tsParser,
+      ecmaVersion: 'latest',
+      sourceType: 'module'
+    },
+
+    rules: {
+      '@typescript-eslint/no-require-imports': [
+        'error',
+        {
+          allowAsImport: true
+        }
+      ]
+    }
+  }
+]);

package.json

@@ -31,6 +31,9 @@
     "handlebars": "^4.7.7"
   },
   "devDependencies": {
+    "@eslint/compat": "^2.0.0",
+    "@eslint/eslintrc": "^3.3.3",
+    "@eslint/js": "^9.39.2",
     "@types/node": "^20.19.27",
     "@typescript-eslint/eslint-plugin": "^8.50.0",
     "@typescript-eslint/parser": "^8.50.0",

yarn.lock

@@ -1174,6 +1174,20 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@eslint/compat@npm:^2.0.0":
+  version: 2.0.0
+  resolution: "@eslint/compat@npm:2.0.0"
+  dependencies:
+    "@eslint/core": ^1.0.0
+  peerDependencies:
+    eslint: ^8.40 || 9
+  peerDependenciesMeta:
+    eslint:
+      optional: true
+  checksum: b13e61d2f376744cfa4d2698f50ab12c13f92dbadc853211a8f293b282ab31940c0e7090db33b9be95887b7ebafc8c4f8c497ab39bb830ed5559cf21d079b39e
+  languageName: node
+  linkType: hard
+
 "@eslint/config-array@npm:^0.21.1":
   version: 0.21.1
   resolution: "@eslint/config-array@npm:0.21.1"
@@ -1203,7 +1217,16 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@eslint/eslintrc@npm:^3.3.1":
+"@eslint/core@npm:^1.0.0":
+  version: 1.0.0
+  resolution: "@eslint/core@npm:1.0.0"
+  dependencies:
+    "@types/json-schema": ^7.0.15
+  checksum: 9f32f5c813d4336f94de3ed2f95140d89a842d0b3978254b6f5ddacaa1db5a05cf59d65055040242f91fb5a340638cd3b2bcca875c1b82279a6e63700c80c3cc
+  languageName: node
+  linkType: hard
+
+"@eslint/eslintrc@npm:^3.3.1, @eslint/eslintrc@npm:^3.3.3":
   version: 3.3.3
   resolution: "@eslint/eslintrc@npm:3.3.3"
   dependencies:
@@ -1220,7 +1243,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@eslint/js@npm:9.39.2":
+"@eslint/js@npm:9.39.2, @eslint/js@npm:^9.39.2":
   version: 9.39.2
   resolution: "@eslint/js@npm:9.39.2"
   checksum: 362aa447266fa5717e762b2b252f177345cb0d7b2954113db9773b3a28898f7cbbc807e07f8078995e6da3f62791f7c5fa2c03517b7170a8e76613cf7fd83c92
@@ -3485,6 +3508,9 @@ __metadata:
   dependencies:
     "@actions/core": ^1.11.1
     "@docker/actions-toolkit": 0.62.1
+    "@eslint/compat": ^2.0.0
+    "@eslint/eslintrc": ^3.3.3
+    "@eslint/js": ^9.39.2
     "@types/node": ^20.19.27
     "@typescript-eslint/eslint-plugin": ^8.50.0
     "@typescript-eslint/parser": ^8.50.0