chore: use ESLint v10

examples/eslint-v9/eslint.config.ts

@@ -0,0 +1,69 @@
+import js from '@eslint/js';
+// @ts-expect-error - Could not find a declaration file for module '@shopify/eslint-plugin'.
+import shopifyEslintPlugin from '@shopify/eslint-plugin';
+import tsParser from '@typescript-eslint/parser';
+import tseslint from 'typescript-eslint';
+import { defineConfig } from 'eslint/config';
+import wyrm from 'eslint-plugin-wyrm';
+import * as sonarjs from 'eslint-plugin-sonarjs';
+import eslintPluginUnicorn from 'eslint-plugin-unicorn';
+import type { Plugin } from '@eslint/core';
+
+export default defineConfig([
+  {
+    files: ['**/*.{js,mjs,cjs,ts,mts,cts}'],
+    extends: [
+      js.configs.recommended,
+      tseslint.configs.strictTypeChecked,
+      tseslint.configs.stylisticTypeChecked,
+    ],
+    languageOptions: {
+      parser: tsParser,
+      ecmaVersion: 'latest',
+      sourceType: 'module',
+      parserOptions: {
+        projectService: true,
+        tsconfigRootDir: import.meta.dirname,
+      },
+    },
+    linterOptions: {
+      reportUnusedDisableDirectives: 'error',
+      reportUnusedInlineConfigs: 'error',
+    },
+  },
+
+  {
+    plugins: { shopify: shopifyEslintPlugin as Plugin },
+  },
+
+  sonarjs.configs.recommended,
+  eslintPluginUnicorn.configs.recommended,
+
+  // ...shopifyEslintPlugin.configs.esnext,
+  // ...shopifyEslintPlugin.configs.typescript,
+  // ...shopifyEslintPlugin.configs['typescript-type-checking'],
+
+  {
+    rules: {
+      'no-else-return': ['error', { allowElseIf: false }],
+      'no-lone-blocks': 'error',
+
+      'unicorn/prevent-abbreviations': 'off',
+      'unicorn/no-useless-undefined': 'off',
+      'unicorn/throw-new-error': 'off',
+      'unicorn/new-for-builtins': 'off',
+      'unicorn/no-null': 'off',
+      'unicorn/no-negated-condition': 'off',
+      'unicorn/no-array-reduce': 'off',
+      'unicorn/prefer-spread': 'off',
+
+      'sonarjs/deprecation': 'off',
+
+      'shopify/prefer-early-return': 'error',
+
+      '@typescript-eslint/array-type': ['error', { default: 'array-simple' }],
+    },
+  },
+
+  wyrm.configs.strictTypeChecked,
+]);

examples/eslint-v9/package.json

@@ -0,0 +1,26 @@
+{
+  "name": "@eslint-plugin-wyrm/eslint-v9",
+  "version": "0.0.0",
+  "private": true,
+  "description": "Example for eslint@9 with eslint-plugin-wyrm",
+  "type": "module",
+  "main": "src/index.ts",
+  "scripts": {
+    "fix:format": "prettier --write .",
+    "lint:format": "prettier --check .",
+    "lint:js": "eslint ."
+  },
+  "devDependencies": {
+    "@eslint/core": "^1.1.1",
+    "@eslint/js": "npm:@eslint/js@9.39.2",
+    "@shopify/eslint-plugin": "^50.0.0",
+    "@typescript-eslint/parser": "^8.56.1",
+    "eslint": "npm:eslint@9.39.2",
+    "eslint-plugin-sonarjs": "^4.0.0",
+    "eslint-plugin-unicorn": "^63.0.0",
+    "eslint-plugin-wyrm": "workspace:*",
+    "jiti": "^2.6.1",
+    "prettier": "^3.8.1",
+    "typescript-eslint": "^8.56.1"
+  }
+}

examples/eslint-v9/src/index.ts

@@ -0,0 +1 @@
+export * from './rules/distribute-boolean-casts.js';

examples/eslint-v9/src/rules/distribute-boolean-casts.ts

@@ -0,0 +1,17 @@
+interface Bar {
+  isOpen: boolean;
+  tables: number[];
+}
+
+interface Foo {
+  description: string;
+}
+
+export function distributeBooleanCast(
+  bar: Bar | undefined,
+  foo?: Foo,
+  defaultDescription?: string,
+): boolean {
+  // eslint-disable-next-line wyrm/distribute-boolean-casts
+  return !!(bar && bar.tables.length > 42 && (foo?.description ?? defaultDescription));
+}

examples/eslint-v9/tsconfig.json

@@ -0,0 +1,28 @@
+{
+  "compilerOptions": {
+    "noEmit": true,
+
+    "module": "nodenext",
+    "target": "esnext",
+    "lib": ["esnext"],
+
+    "allowJs": true,
+    "checkJs": true,
+
+    "verbatimModuleSyntax": true,
+    "isolatedModules": true,
+    "moduleDetection": "force",
+    "skipLibCheck": true,
+
+    "noUncheckedSideEffectImports": true,
+    "noUncheckedIndexedAccess": true,
+    "exactOptionalPropertyTypes": true,
+    "noImplicitReturns": true,
+    "noImplicitOverride": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noFallthroughCasesInSwitch": true,
+    "noPropertyAccessFromIndexSignature": true,
+    "strict": true
+  }
+}

examples/example-react/package.json

@@ -32,7 +32,6 @@
     "globals": "^17.4.0",
     "jiti": "^2.6.1",
     "prettier": "^3.8.1",
-    "rolldown-vite": "^7.3.1",
     "typescript": "~5.9.3",
     "typescript-eslint": "^8.56.1",
     "vite": "^8.0.0"