syntax-checker/eslint.config.js at main · doc4d/syntax-checker · GitHub

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import js from '@eslint/js';
import tseslint from '@typescript-eslint/eslint-plugin';
import tsparser from '@typescript-eslint/parser';

export default [
  // Apply to all JS/TS files
  {
    files: ['**/*.{js,ts}'],
    languageOptions: {
      parser: tsparser,
      parserOptions: {
        ecmaVersion: 2022,
        sourceType: 'module',
      },
      globals: {
        console: 'readonly',
        process: 'readonly',
        Buffer: 'readonly',
        __dirname: 'readonly',
        __filename: 'readonly',
        global: 'readonly',
        exports: 'readonly',
        module: 'readonly',
        require: 'readonly',
        performance: 'readonly'
      }
    },
    plugins: {
      '@typescript-eslint': tseslint,
    },
    rules: {
      // Base JavaScript rules
      ...js.configs.recommended.rules,

      // TypeScript-specific rules
      '@typescript-eslint/no-unused-vars': ['error', {
        'argsIgnorePattern': '^_',
        'varsIgnorePattern': '^_'
      }],
      '@typescript-eslint/no-explicit-any': 'warn',
      '@typescript-eslint/explicit-function-return-type': 'off',
      '@typescript-eslint/explicit-module-boundary-types': 'off',
      '@typescript-eslint/no-inferrable-types': 'off',

      // Code style rules
      'indent': ['error', 4, { 'SwitchCase': 1 }],
      'quotes': ['error', 'single', { 'avoidEscape': true }],
      'semi': ['error', 'always'],
      'comma-dangle': ['error', 'never'],
      'no-trailing-spaces': 'error',
      'no-multiple-empty-lines': ['error', { 'max': 2 }],
      'eol-last': 'error',

      // Best practices
      'no-console': 'off', // Allow console for CLI tool
      'no-debugger': 'error',
      'no-alert': 'error',
      'no-eval': 'error',
      'no-implied-eval': 'error',
      'no-new-func': 'error',
      'no-script-url': 'error',

      // Allow unused vars in constants/enums (common in TypeScript)
      'no-unused-vars': 'off', // Use TypeScript rule instead

      // Relax some strict rules for this project
      'no-case-declarations': 'off'
    },
  },

  // Test files - more relaxed rules
  {
    files: ['tests/**/*.{js,ts}', '**/*.test.{js,ts}', '**/*.spec.{js,ts}'],
    rules: {
      '@typescript-eslint/no-explicit-any': 'off',
      'no-console': 'off',
      '@typescript-eslint/no-unused-vars': 'off'
    },
  },

  // Configuration files
  {
    files: ['*.config.{js,ts}', '.eslintrc.{js,ts}'],
    languageOptions: {
      globals: {
        module: 'readonly',
        require: 'readonly',
        process: 'readonly',
        __dirname: 'readonly',
        __filename: 'readonly'
      }
    }
  },

  // Ignore patterns
  {
    ignores: [
      'out/**',
      'dist/**',
      'node_modules/**',
      'coverage/**',
      '*.d.ts',
      'vitest.config.js'
    ]
  }
];