chore: move lint rules to Biome

benchmark/packages/timer/src/index.ts

@@ -27,7 +27,6 @@ export default function createIntegration(): AstroIntegration {
 				setAdapter(getAdapter());
 
 				if (config.output === 'static') {
-					// eslint-disable-next-line no-console
 					console.warn(`[@benchmark/timer] \`output: "server"\` is required to use this adapter.`);
 				}
 			},

benchmark/packages/timer/src/preview.ts

@@ -9,7 +9,7 @@ const preview: CreatePreviewServer = async function ({ serverEntrypoint, host, p
 	server.listen(port, host);
 	enableDestroy(server);
 
-	// eslint-disable-next-line no-console
+	// biome-ignore lint/suspicious/noConsoleLog: allowed
 	console.log(`Preview server listening on http://${host}:${port}`);
 
 	// Resolves once the server is closed

biome.jsonc

@@ -0,0 +1,139 @@
+{
+	"$schema": "https://biomejs.dev/schemas/1.9.3/schema.json",
+	"files": {
+		"ignore": [
+			"vendor",
+			"**/dist/**",
+			"**/smoke/**",
+			"**/fixtures/**",
+			"**/vendor/**",
+			"**/.vercel/**",
+		],
+		"include": ["test/**", "e2e/**", "packages/**", "/scripts/**"],
+	},
+	"formatter": {
+		"indentStyle": "tab",
+		"indentWidth": 2,
+		"lineWidth": 100,
+		"ignore": [
+			"benchmark/projects/",
+			"benchmark/results/",
+			".changeset",
+			"pnpm-lock.yaml",
+			"*.astro",
+		],
+	},
+	"organizeImports": {
+		"enabled": true,
+	},
+	"linter": {
+		"enabled": true,
+		"rules": {
+			"recommended": false,
+			"style": {
+				"useNodejsImportProtocol": "error",
+				// Enforce separate type imports for type-only imports to avoid bundling unneeded code
+				"useImportType": "error",
+			},
+			"suspicious": {
+				// This one is specific to catch `console.log`. The rest of logs are permitted
+				"noConsoleLog": "warn",
+			},
+			"correctness": {
+				"noUnusedVariables": "info",
+				"noUnusedFunctionParameters": "info",
+			},
+		},
+	},
+	"javascript": {
+		"formatter": {
+			"trailingCommas": "all",
+			"quoteStyle": "single",
+			"semicolons": "always",
+		},
+	},
+	"json": {
+		"parser": {
+			"allowComments": true,
+			"allowTrailingCommas": true,
+		},
+		"formatter": {
+			"indentStyle": "space",
+			"trailingCommas": "none",
+		},
+	},
+	"overrides": [
+		{
+			// Workaround to format files like npm does
+			"include": ["package.json"],
+			"json": {
+				"formatter": {
+					"lineWidth": 1,
+				},
+			},
+		},
+		{
+			// We don"t want to have node modules in code that should be runtime agnostic
+			"include": ["packages/astro/src/runtime/**/*.ts"],
+			"linter": {
+				"rules": {
+					"correctness": {
+						"noNodejsModules": "error",
+					},
+				},
+			},
+		},
+		{
+			"include": ["*.test.js"],
+			"linter": {
+				"rules": {
+					"suspicious": {
+						"noFocusedTests": "error",
+						"noConsole": "off",
+					},
+				},
+			},
+		},
+		{
+			"include": ["*.astro", "client.d.ts"],
+			"linter": {
+				"rules": {
+					"correctness": {
+						"noUnusedVariables": "off",
+					},
+				},
+			},
+		},
+		{
+			"include": ["packages/integrations/**/*.ts"],
+			"linter": {
+				"rules": {
+					"suspicious": {
+						"noConsole": {
+							"level": "error",
+							"options": {
+								"allow": ["warn", "error", "info", "debug"],
+							},
+						},
+					},
+				},
+			},
+		},
+		{
+			"include": [
+				"packages/db/**/cli/**/*.ts",
+				"benchmark/**/*.js",
+				"packages/astro/src/cli/**/*.ts",
+				"packages/astro/astro.js",
+			],
+			"linter": {
+				"rules": {
+					"suspicious": {
+						"noConsole": "off",
+						"noConsoleLog": "off",
+					},
+				},
+			},
+		},
+	],
+}

eslint.config.js

@@ -1,6 +1,5 @@
 import path from 'node:path';
 import { fileURLToPath } from 'node:url';
-import { builtinModules } from 'node:module';
 
 import tseslint from 'typescript-eslint';
 
@@ -51,19 +50,11 @@ export default [
 		rules: {
 			// These off/configured-differently-by-default rules fit well for us
 			'@typescript-eslint/switch-exhaustiveness-check': 'error',
-			'@typescript-eslint/no-unused-vars': [
-				'error',
-				{
-					argsIgnorePattern: '^_',
-					varsIgnorePattern: '^_',
-					caughtErrorsIgnorePattern: '^_',
-					ignoreRestSiblings: true,
-				},
-			],
 			'@typescript-eslint/no-shadow': 'error',
-			'no-console': 'warn',
+			'no-console': 'off',
 
 			// Todo: do we want these?
+			'@typescript-eslint/no-unused-vars': 'off',
 			'@typescript-eslint/array-type': 'off',
 			'@typescript-eslint/ban-ts-comment': 'off',
 			'@typescript-eslint/class-literal-property-style': 'off',
@@ -95,16 +86,8 @@ export default [
 			'@typescript-eslint/unbound-method': 'off',
 			'@typescript-eslint/no-explicit-any': 'off',
 
-			// Enforce separate type imports for type-only imports to avoid bundling unneeded code
-			'@typescript-eslint/consistent-type-imports': [
-				'error',
-				{
-					prefer: 'type-imports',
-					fixStyle: 'separate-type-imports',
-					disallowTypeAnnotations: false,
-				},
-			],
-
+			// Used by Biome
+			'@typescript-eslint/consistent-type-imports': 'off',
 			// These rules enabled by the preset configs don't work well for us
 			'@typescript-eslint/await-thenable': 'off',
 			'prefer-const': 'off',
@@ -115,20 +98,6 @@ export default [
 			'regexp/prefer-regexp-test': 'warn',
 		},
 	},
-
-	{
-		// Ensure Node builtins aren't included in Astro's server runtime
-		files: ['packages/astro/src/runtime/**/*.ts'],
-		rules: {
-			'no-restricted-imports': [
-				'error',
-				{
-					paths: [...builtinModules],
-					patterns: ['node:*'],
-				},
-			],
-		},
-	},
 	{
 		files: ['packages/astro/src/runtime/client/**/*.ts'],
 		languageOptions: {
@@ -137,36 +106,6 @@ export default [
 			},
 		},
 	},
-	{
-		files: ['packages/**/test/*.js', 'packages/**/*.js'],
-		languageOptions: {
-			globals: {
-				globalThis: false, // false means read-only
-			},
-		},
-		rules: {
-			'no-console': 'off',
-		},
-	},
-	{
-		files: ['packages/integrations/**/*.ts'],
-		rules: {
-			'no-console': ['error', { allow: ['warn', 'error', 'info', 'debug'] }],
-		},
-	},
-	{
-		files: ['benchmark/**/*.js'],
-		rules: {
-			'@typescript-eslint/no-unused-vars': 'off',
-			'no-console': 'off',
-		},
-	},
-	{
-		files: ['packages/db/**/cli/**/*.ts'],
-		rules: {
-			'no-console': 'off',
-		},
-	},
 	{
 		files: ['packages/astro/src/core/errors/errors-data.ts'],
 		rules: {

package.json

@@ -36,6 +36,7 @@
     "test:e2e:hosts": "turbo run test:hosted",
     "benchmark": "astro-benchmark",
     "lint": "biome lint && eslint . --report-unused-disable-directives",
+    "lint:fix": "biome lint --write --unsafe",
     "version": "changeset version && node ./scripts/deps/update-example-versions.js && pnpm install --no-frozen-lockfile && pnpm run format",
     "preinstall": "npx only-allow pnpm"
   },
@@ -53,7 +54,7 @@
   },
   "devDependencies": {
     "@astrojs/check": "^0.9.4",
-    "@biomejs/biome": "1.8.3",
+    "@biomejs/biome": "1.9.3",
     "@changesets/changelog-github": "^0.5.0",
     "@changesets/cli": "^2.27.9",
     "@types/node": "^18.17.8",

packages/astro-prism/src/highlighter.ts

@@ -26,7 +26,6 @@ export function runHighlighterWithAstro(lang: string | undefined, code: string)
 	}
 
 	if (lang && !Prism.languages[lang]) {
-		// eslint-disable-next-line no-console
 		console.warn(`Unable to load the language: ${lang}`);
 	}
 

packages/astro-prism/src/plugin.ts

@@ -8,7 +8,6 @@ export function addAstro(Prism: typeof import('prismjs')) {
 		scriptLang = 'typescript';
 	} else {
 		scriptLang = 'javascript';
-		// eslint-disable-next-line no-console
 		console.warn(
 			'Prism TypeScript language not loaded, Astro scripts will be treated as JavaScript.',
 		);

packages/astro-rss/src/index.ts

@@ -70,7 +70,6 @@ const rssOptionsValidator = z.object({
 		.or(globResultValidator)
 		.transform((items) => {
 			if (!Array.isArray(items)) {
-				// eslint-disable-next-line
 				console.warn(
 					yellow(
 						'[RSS] Passing a glob result directly has been deprecated. Please migrate to the `pagesGlobToRssItems()` helper: https://docs.astro.build/en/guides/rss/',

packages/astro/astro-jsx.d.ts

@@ -1,5 +1,4 @@
 /// <reference lib="dom" />
-/* eslint @typescript-eslint/no-unused-vars: off */
 /**
  * Adapted from babel-plugin-react-html-attrs's TypeScript definition from DefinitelyTyped.
  * @see https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/types/babel-plugin-react-html-attrs/index.d.ts