#5728 Migrate eslint to flat config

eslint.config.mjs

@@ -0,0 +1,173 @@
+// Importing necessary ESLint plugins
+import typescriptEslint from 'typescript-eslint';
+import noOnlyTestsPlugin from 'eslint-plugin-no-only-tests';
+import headerPlugin from 'eslint-plugin-header';
+import jsdocPlugin from 'eslint-plugin-jsdoc';
+import preferArrowPlugin from 'eslint-plugin-prefer-arrow';
+import importPlugin from 'eslint-plugin-import';
+import noNullPlugin from 'eslint-plugin-no-null';
+import localRulesPlugin from 'eslint-plugin-local-rules'; // Adjust the import path as necessary
+import globals from 'globals';
+import eslintConfigPrettier from 'eslint-config-prettier';
+import pluginJs from '@eslint/js';
+export default [
+  pluginJs.configs.recommended,
+  eslintConfigPrettier,
+  ...typescriptEslint.config({
+    plugins: {
+      '@typescript-eslint': typescriptEslint.plugin,
+      'no-only-tests': noOnlyTestsPlugin,
+      header: headerPlugin,
+      jsdoc: jsdocPlugin,
+      'prefer-arrow': preferArrowPlugin,
+      import: importPlugin,
+      'no-null': noNullPlugin,
+      'local-rules': localRulesPlugin,
+    },
+    ignores: ['eslint.config.js'],
+    extends: [...typescriptEslint.configs.strictTypeChecked, ...typescriptEslint.configs.stylisticTypeChecked],
+    languageOptions: {
+      parser: typescriptEslint.parser,
+      sourceType: 'module',
+      ecmaVersion: 'latest',
+      sourceType: 'module',
+      globals: {
+        ...globals.browser,
+        ...globals.node,
+        ...globals.commonjs,
+        ...globals.es6,
+        $: false,
+        chrome: false,
+        OpenPGP: false,
+      },
+    },
+    rules: {
+      '@typescript-eslint/consistent-indexed-object-style': 'off',
+      '@typescript-eslint/consistent-type-assertions': 'error',
+      '@typescript-eslint/consistent-type-definitions': 'off',
+      '@typescript-eslint/dot-notation': 'error',
+      '@typescript-eslint/explicit-function-return-type': 'off',
+      '@typescript-eslint/explicit-member-accessibility': [
+        'error',
+        {
+          accessibility: 'explicit',
+        },
+      ],
+      '@typescript-eslint/explicit-module-boundary-types': 'off',
+      '@typescript-eslint/member-ordering': 'error',
+      '@typescript-eslint/naming-convention': [
+        'error',
+        {
+          selector: 'default',
+          format: ['camelCase'],
+          leadingUnderscore: 'allow',
+          trailingUnderscore: 'allow',
+        },
+        {
+          selector: 'variable',
+          format: ['camelCase', 'UPPER_CASE'],
+          leadingUnderscore: 'allow',
+          trailingUnderscore: 'allow',
+        },
+        {
+          selector: 'typeLike',
+          format: ['PascalCase'],
+        },
+        {
+          selector: ['classProperty', 'objectLiteralProperty', 'typeProperty', 'classMethod', 'objectLiteralMethod', 'typeMethod', 'accessor', 'enumMember'],
+          format: null,
+          modifiers: ['requiresQuotes'],
+        },
+        {
+          selector: ['classProperty'],
+          format: ['camelCase', 'UPPER_CASE'],
+          leadingUnderscore: 'allow',
+        },
+        {
+          selector: ['import'],
+          format: ['camelCase', 'PascalCase'],
+        },
+      ],
+      '@typescript-eslint/no-empty-interface': 'off',
+      '@typescript-eslint/no-explicit-any': ['warn'],
+      '@typescript-eslint/no-extraneous-class': 'off',
+      '@typescript-eslint/no-floating-promises': 'error',
+      '@typescript-eslint/no-misused-new': 'error',
+      '@typescript-eslint/no-namespace': 'off',
+      '@typescript-eslint/no-parameter-properties': 'off',
+      '@typescript-eslint/no-shadow': 'off',
+      '@typescript-eslint/no-unsafe-return': 'error',
+      '@typescript-eslint/no-unused-vars': ['error'],
+      '@typescript-eslint/no-unused-expressions': 'error',
+      '@typescript-eslint/no-use-before-define': 'off',
+      '@typescript-eslint/no-var-requires': 'error',
+      '@typescript-eslint/prefer-for-of': 'error',
+      '@typescript-eslint/prefer-function-type': 'error',
+      '@typescript-eslint/prefer-namespace-keyword': 'error',
+      '@typescript-eslint/type-annotation-spacing': 'off',
+      '@typescript-eslint/typedef': 'off',
+      '@typescript-eslint/unbound-method': ['error', { ignoreStatic: true }],
+      '@typescript-eslint/unified-signatures': 'error',
+      complexity: 'off',
+      'constructor-super': 'error',
+      'dot-notation': 'error',
+      eqeqeq: ['error', 'smart'],
+      'guard-for-in': 'error',
+      'header/header': ['error', 'block', ' ©️ 2016 - present FlowCrypt a.s. Limitations apply. Contact [email protected] '],
+      'id-denylist': 'error',
+      'id-match': 'error',
+      'import/order': 'off',
+      'jsdoc/check-alignment': 'off',
+      'jsdoc/check-indentation': 'off',
+      'jsdoc/newline-after-description': 'off',
+      'max-classes-per-file': 'off',
+      'no-bitwise': 'off',
+      'no-caller': 'error',
+      'no-cond-assign': 'error',
+      'no-console': 'off',
+      'no-constant-condition': 0,
+      'no-control-regex': 0,
+      'no-debugger': 'error',
+      'no-empty': 'error',
+      'no-empty-pattern': 0,
+      'no-eval': 'error',
+      'no-fallthrough': 0,
+      'no-invalid-this': 'off',
+      'no-new-wrappers': 'error',
+      'no-null/no-null': 'error',
+      'no-only-tests/no-only-tests': ['error'],
+      'no-prototype-builtins': 0,
+      'no-shadow': 'off',
+      'no-throw-literal': 'error',
+      'no-undef': 0,
+      'no-undef-init': 'error',
+      'no-underscore-dangle': 'error',
+      'no-unsafe-finally': 'error',
+      'no-unused-expressions': 'off',
+      'no-unused-labels': 'error',
+      'no-use-before-define': 'off',
+      'no-useless-escape': 0,
+      'no-var': 'error',
+      'object-shorthand': 'error',
+      'one-var': ['off', 'never'],
+      'prefer-arrow/prefer-arrow-functions': 'error',
+      'prefer-const': [
+        'error',
+        {
+          destructuring: 'all',
+        },
+      ],
+      radix: 'off',
+      'require-atomic-updates': 0,
+      'sort-imports': 'off',
+      'spaced-comment': [
+        'error',
+        'always',
+        {
+          markers: ['/'],
+        },
+      ],
+      'local-rules/standard-loops': 'error',
+    },
+  }),
+];