eslint.config.js

import eslint from "@eslint/js";
import vitest from "@vitest/eslint-plugin";
import n from "eslint-plugin-n";
import tseslint from "typescript-eslint";

export default tseslint.config(
	{
		ignores: [
			"coverage*",
			"lib",
			"node_modules",
			"pnpm-lock.yaml",
			"**/*.snap",
		],
	},
	{
		linterOptions: {
			reportUnusedDisableDirectives: "error",
		},
	},
	eslint.configs.recommended,
	n.configs["flat/recommended"],
	...tseslint.config({
		extends: tseslint.configs.recommendedTypeChecked,
		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: ["*.jsonc"],
		rules: {
			"jsonc/comma-dangle": "off",
			"jsonc/no-comments": "off",
			"jsonc/sort-keys": "error",
		},
	},
	{
		extends: [tseslint.configs.disableTypeChecked],
		files: ["**/*.md/*.ts"],
		rules: {
			"n/no-missing-import": ["error", { allowModules: ["test-lib"] }],
		},
	},
	{
		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",
		},
	},
);