slire/eslint.config.mjs at main · dchowitz/slire · GitHub

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// Flat config for ESLint 9+ with TypeScript and ESM
import tseslint from 'typescript-eslint';
import importPlugin from 'eslint-plugin-import';
import eslintConfigPrettier from 'eslint-config-prettier';

export default [
  // Ignore build output and deps
  { ignores: ['dist/**', 'node_modules/**'] },

  // Base TypeScript rules for source and tests
  ...tseslint.configs.recommended,
  {
    files: ['src/**/*.ts', 'tests/**/*.ts'],
    languageOptions: {
      ecmaVersion: 'latest',
      sourceType: 'module',
    },
  },

  // Jest test files: enable test globals
  {
    files: ['tests/**/*.ts'],
    languageOptions: {
      globals: {
        // Common Jest globals
        jest: 'readonly',
        expect: 'readonly',
        describe: 'readonly',
        it: 'readonly',
        test: 'readonly',
        beforeAll: 'readonly',
        afterAll: 'readonly',
        beforeEach: 'readonly',
        afterEach: 'readonly',
      },
    },
  },

  // CommonJS utility scripts used by Jest emulators
  {
    files: ['jest-emulator-setup.js', 'jest-emulator-teardown.js'],
    languageOptions: {
      ecmaVersion: 'latest',
      sourceType: 'commonjs',
    },
    linterOptions: {
      reportUnusedDisableDirectives: true,
    },
    rules: {
      '@typescript-eslint/no-require-imports': 'off',
      '@typescript-eslint/no-var-requires': 'off',
    },
  },

  // Turn off stylistic rules that conflict with Prettier
  eslintConfigPrettier,

  // Imports
  {
    files: ['**/*.ts', '**/*.tsx', '**/*.js', '**/*.jsx'],
    plugins: {
      import: importPlugin,
    },
    rules: {
      'sort-imports': [
        'error',
        {
          ignoreDeclarationSort: true, // keep import/order in charge of import lines
          ignoreCase: true,
          allowSeparatedGroups: true,
          // memberSyntaxSortOrder default is fine: ['none','all','multiple','single']
        },
      ],
      'import/order': [
        'error',
        {
          groups: [
            'builtin',
            'external',
            'internal',
            'parent',
            'sibling',
            'index',
            'object',
            'type',
          ],
          'newlines-between': 'never',
          alphabetize: {
            order: 'asc',
            caseInsensitive: true,
          },
        },
      ],
    },
  },

  // Override or add rules here
  {
    files: ['**/*.ts', '**/*.tsx', '**/*.cts', '**/*.mts'],
    rules: {
      '@typescript-eslint/no-unused-vars': [
        'error',
        {
          argsIgnorePattern: '^_',
          varsIgnorePattern: '^_',
          caughtErrorsIgnorePattern: '^_',
          ignoreRestSiblings: true,
        },
      ],
      '@typescript-eslint/no-explicit-any': 'off',
      '@typescript-eslint/no-empty-object-type': 'off',
      '@typescript-eslint/no-non-null-assertion': 'off',
      'no-unused-vars': 'off', // Turn off base rule as it conflicts with TypeScript rule
      'no-case-declarations': 'off',
    },
  },
];