eslint.config.mjs

// @ts-check

import eslint from '@eslint/js';
import tseslint from 'typescript-eslint';

export default tseslint.config(
	eslint.configs.recommended,
	...tseslint.configs.recommendedTypeChecked,
	{
		plugins: {
			'@typescript-eslint': tseslint.plugin,
		},
		languageOptions: {
			parser: tseslint.parser,
			parserOptions: {
				project: true,
			},
		},
		rules: {
			eqeqeq: 'error',
			'@typescript-eslint/no-restricted-types': [
				'error',
				{
					types: {
						null: {
							message: "Use `undefined` as the equivalent to Lua's `nil`",
							fixWith: 'undefined',
							suggest: ['undefined'],
						},
					},
				},
			],
			'no-unused-vars': 'off',
			'@typescript-eslint/no-unused-vars': [
				'error',
				{
					args: 'all',
					argsIgnorePattern: '^_',
					caughtErrors: 'all',
					caughtErrorsIgnorePattern: '^_',
					destructuredArrayIgnorePattern: '^_',
					varsIgnorePattern: '^_',
					ignoreRestSiblings: true,
				},
			],
			'@typescript-eslint/strict-boolean-expressions': [
				'error',
				{
					allowString: false,
					allowNumber: false,
				},
			],
			'@typescript-eslint/restrict-plus-operands': 'off',
		},
	},
	{
		// disable type-aware linting on JS files
		files: ['**/*.js', '**/*.mjs', '**/*.cjs'],
		...tseslint.configs.disableTypeChecked,
	},
);