Upgrade to eslint 9.

Author: fniephaus

.eslintignore

@@ -28,11 +28,11 @@ jobs:
         java-version: ['23', '21', '17', '20', 'dev']
         distribution: ['graalvm', 'graalvm-community']
         os: [
-          ubuntu-latest,
-          macos-latest, # macOS on Apple silicon
-          macos-13,     # macOS on Intel
-          windows-latest
-        ]
+            ubuntu-latest,
+            macos-latest, # macOS on Apple silicon
+            macos-13, # macOS on Intel
+            windows-latest
+          ]
         set-gds-token: [false]
         components: ['']
         include:
@@ -456,4 +456,4 @@ jobs:
           mvn --no-transfer-progress -Pnative package
           cmd /c verify-sbom.cmd
         shell: cmd
-        if: runner.os == 'Windows'
+        if: runner.os == 'Windows'

.eslintrc.json

@@ -1,3 +1,3 @@
 dist/
-lib/
-node_modules/
+node_modules/
+README.md

.github/workflows/test.yml

@@ -0,0 +1,16 @@
+# See: https://prettier.io/docs/en/configuration
+
+printWidth: 80
+tabWidth: 2
+useTabs: false
+semi: false
+singleQuote: true
+quoteProps: as-needed
+jsxSingleQuote: false
+trailingComma: none
+bracketSpacing: true
+bracketSameLine: true
+arrowParens: always
+proseWrap: always
+htmlWhitespaceSensitivity: css
+endOfLine: lf

.prettierignore

@@ -0,0 +1,81 @@
+// See: https://eslint.org/docs/latest/use/configure/configuration-files
+
+import {fixupPluginRules} from '@eslint/compat'
+import {FlatCompat} from '@eslint/eslintrc'
+import js from '@eslint/js'
+import typescriptEslint from '@typescript-eslint/eslint-plugin'
+import tsParser from '@typescript-eslint/parser'
+import _import from 'eslint-plugin-import'
+import jest from 'eslint-plugin-jest'
+import prettier from 'eslint-plugin-prettier'
+import globals from 'globals'
+import path from 'node:path'
+import {fileURLToPath} from 'node:url'
+
+const __filename = fileURLToPath(import.meta.url)
+const __dirname = path.dirname(__filename)
+const compat = new FlatCompat({
+  baseDirectory: __dirname,
+  recommendedConfig: js.configs.recommended,
+  allConfig: js.configs.all
+})
+
+export default [
+  {
+    ignores: ['**/coverage', '**/dist', '**/linter', '**/node_modules']
+  },
+  ...compat.extends(
+    'eslint:recommended',
+    'plugin:@typescript-eslint/eslint-recommended',
+    'plugin:@typescript-eslint/recommended',
+    'plugin:jest/recommended',
+    'plugin:prettier/recommended'
+  ),
+  {
+    plugins: {
+      import: fixupPluginRules(_import),
+      jest,
+      prettier,
+      '@typescript-eslint': typescriptEslint
+    },
+
+    languageOptions: {
+      globals: {
+        ...globals.node,
+        ...globals.jest,
+        Atomics: 'readonly',
+        SharedArrayBuffer: 'readonly'
+      },
+
+      parser: tsParser,
+      ecmaVersion: 2023,
+      sourceType: 'module',
+
+      parserOptions: {
+        project: ['tsconfig.eslint.json'],
+        tsconfigRootDir: '.'
+      }
+    },
+
+    settings: {
+      'import/resolver': {
+        typescript: {
+          alwaysTryTypes: true,
+          project: 'tsconfig.eslint.json'
+        }
+      }
+    },
+
+    rules: {
+      camelcase: 'off',
+      'eslint-comments/no-use': 'off',
+      'eslint-comments/no-unused-disable': 'off',
+      'i18n-text/no-en': 'off',
+      'import/no-namespace': 'off',
+      'no-console': 'off',
+      'no-shadow': 'off',
+      'no-unused-vars': 'off',
+      'prettier/prettier': 'error'
+    }
+  }
+]

.prettierrc.yml

@@ -6,4 +6,4 @@ module.exports = {
     '^.+\\.ts$': 'ts-jest'
   },
   verbose: true
-}
+}