eslint.config.js

import eslint from '@eslint/js'
import vitest from '@vitest/eslint-plugin'
import tseslint from 'typescript-eslint'

export default tseslint.config(
  {
    ignores: [
      'coverage*',
      'lib',
      'node_modules',
      'pnpm-lock.yaml',
      '**/*.snap',
    ],
  },
  {
    linterOptions: {
      reportUnusedDisableDirectives: 'error',
    },
  },
  eslint.configs.recommended,
  ...tseslint.config({
    extends: tseslint.configs.strictTypeChecked,
    files: ['**/*.js', '**/*.ts'],
    languageOptions: {
      parserOptions: {
        projectService: {
          allowDefaultProject: ['*.*s', 'eslint.config.js'],
          defaultProject: './tsconfig.json',
        },
        tsconfigRootDir: import.meta.dirname,
      },
    },
    rules: {
      // These on-by-default rules don't work well for this repo and we like them off.
      'no-constant-condition': 'off',

      // These on-by-default rules work well for this repo if configured
      '@typescript-eslint/no-unused-vars': ['error', { caughtErrors: 'all' }],
    },
  }),
  {
    files: ['**/*.test.*'],
    languageOptions: {
      globals: vitest.environments.env.globals,
    },
    plugins: { vitest },
    rules: {
      ...vitest.configs.recommended.rules,

      // These on-by-default rules aren't useful in test files.
      '@typescript-eslint/no-unsafe-assignment': 'off',
      '@typescript-eslint/no-unsafe-call': 'off',
    },
  },
)