chore: migrate to eslint 9 and eslint-config-airbnb-extended

eslint.config.mjs

@@ -0,0 +1,79 @@
+/**
+ * THIS FILE WAS AUTO-GENERATED.
+ * PLEASE DO NOT EDIT IT MANUALLY.
+ * ===============================
+ * IF YOU COPY THIS INTO AN ESLINT CONFIG, REMOVE THIS COMMENT BLOCK.
+ */
+
+import js from '@eslint/js';
+import { defineConfig } from 'eslint/config';
+import { configs, plugins, rules } from 'eslint-config-airbnb-extended';
+import chaiFriendly from 'eslint-plugin-chai-friendly';
+
+const jsConfig = defineConfig([
+    // ESLint recommended config
+    {
+        name: 'js/config',
+        ...js.configs.recommended,
+    },
+    // Stylistic plugin
+    plugins.stylistic,
+    // Import X plugin
+    plugins.importX,
+    // Airbnb base recommended config
+    ...configs.base.recommended,
+    // Strict import rules
+    rules.base.importsStrict,
+]);
+
+const nodeConfig = defineConfig([
+    // Node plugin
+    plugins.node,
+    // Airbnb Node recommended config
+    ...configs.node.recommended,
+]);
+
+const typescriptConfig = defineConfig([
+    // TypeScript ESLint plugin
+    plugins.typescriptEslint,
+    // Airbnb base TypeScript config
+    ...configs.base.typescript,
+    // Strict TypeScript rules
+    rules.typescript.typescriptEslintStrict,
+]);
+
+export default defineConfig([
+    // JavaScript config
+    ...jsConfig,
+    // Node config
+    ...nodeConfig,
+    // TypeScript config
+    ...typescriptConfig,
+    // Chai friendly plugin
+    chaiFriendly.configs.recommendedFlat,
+    // Custom overrides
+    {
+        rules: {
+            '@stylistic/indent': ['error', 4],
+            'no-underscore-dangle': 'off',
+            'no-bitwise': ['error', { allow: ['<<', '&', '|=', '|'] }],
+            'max-classes-per-file': 'off',
+            'n/no-sync': 'off',
+            '@typescript-eslint/no-use-before-define': 'off',
+            'eol-last': ['error', 'always'],
+            'import-x/prefer-default-export': 'off',
+            '@typescript-eslint/no-explicit-any': 'off',
+            'import-x/no-cycle': 'warn',
+            '@typescript-eslint/unified-signatures': 'off',
+            // We use empty inherited interface and decorator to merge implementation of mixin
+            '@typescript-eslint/no-empty-object-type': 'off',
+            '@typescript-eslint/no-unsafe-declaration-merging': 'off',
+        },
+    },
+    {
+        files: ['test/**'],
+        rules: {
+            '@typescript-eslint/no-non-null-assertion': 'off',
+        },
+    },
+]);