mycal/eslint.config.js at master · AungMyoKyaw/mycal · GitHub

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// @ts-check

import eslint from '@eslint/js';
import tseslint from 'typescript-eslint';
import { includeIgnoreFile } from '@eslint/compat';
import path from 'node:path';
import { fileURLToPath } from 'node:url';

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

const gitignorePath = path.resolve(__dirname, '.gitignore');

export default [
  // Include gitignore patterns
  includeIgnoreFile(gitignorePath),

  // Apply base ESLint recommended config
  eslint.configs.recommended,

  // Apply TypeScript ESLint recommended configs
  ...tseslint.configs.recommended,
  ...tseslint.configs.stylistic,

  // Global ignores
  {
    ignores: [
      'dist/**',
      'node_modules/**',
      'coverage/**',
      '*.config.js',
      '.husky/**',
    ],
  },

  // Main source files configuration
  {
    files: ['src/**/*.ts'],
    languageOptions: {
      parser: tseslint.parser,
      parserOptions: {
        projectService: true,
        tsconfigRootDir: __dirname,
        ecmaVersion: 'latest',
        sourceType: 'module',
      },
    },
    rules: {
      // TypeScript-specific rules
      '@typescript-eslint/no-unused-vars': [
        'error',
        {
          argsIgnorePattern: '^_',
          varsIgnorePattern: '^_',
          caughtErrorsIgnorePattern: '^_',
        },
      ],
      '@typescript-eslint/no-explicit-any': 'warn',
      '@typescript-eslint/explicit-function-return-type': 'off',
      '@typescript-eslint/explicit-module-boundary-types': 'off',
      '@typescript-eslint/no-non-null-assertion': 'off',
      '@typescript-eslint/prefer-nullish-coalescing': 'warn',
      '@typescript-eslint/prefer-optional-chain': 'warn',
      '@typescript-eslint/array-type': 'warn',
      '@typescript-eslint/strict-boolean-expressions': 'off',

      // General code quality
      'no-console': 'warn',
      'prefer-const': 'error',
      'no-var': 'error',
      eqeqeq: ['error', 'always'],
      curly: ['error', 'multi-line'],
      'no-throw-literal': 'error',

      // Style rules (complementing Prettier)
      semi: ['error', 'always'],
      quotes: ['error', 'single', { avoidEscape: true }],
    },
  },

  // Test files configuration (more relaxed rules, no type-aware linting)
  {
    files: ['test/**/*.ts', '**/*.test.ts', '**/*.spec.ts'],
    languageOptions: {
      parser: tseslint.parser,
      parserOptions: {
        project: null,
        ecmaVersion: 'latest',
        sourceType: 'module',
      },
    },
    rules: {
      'no-console': 'off',
      '@typescript-eslint/no-explicit-any': 'off',
      '@typescript-eslint/no-unused-vars': 'off',
      '@typescript-eslint/no-non-null-assertion': 'off',
      '@typescript-eslint/no-unused-expressions': 'off',
      '@typescript-eslint/no-floating-promises': 'off',
    },
  },

  // Configuration files
  {
    files: ['*.config.js', '*.config.ts'],
    languageOptions: {
      parserOptions: {
        sourceType: 'module',
      },
    },
    rules: {
      '@typescript-eslint/no-require-imports': 'off',
    },
  },
];