Replace read-package-up with find-up-simple

package.json

@@ -64,12 +64,12 @@
 		"clean-regexp": "^1.0.0",
 		"core-js-compat": "^3.41.0",
 		"esquery": "^1.6.0",
+		"find-up-simple": "^1.0.1",
 		"globals": "^16.0.0",
 		"indent-string": "^5.0.0",
 		"is-builtin-module": "^5.0.0",
 		"jsesc": "^3.1.0",
 		"pluralize": "^8.0.0",
-		"read-package-up": "^11.0.0",
 		"regexp-tree": "^0.1.27",
 		"regjsparser": "^0.12.0",
 		"semver": "^7.7.1",

rules/expiring-todo-comments.js

@@ -1,9 +1,9 @@
 import path from 'node:path';
 import {isRegExp} from 'node:util/types';
-import {readPackageUpSync} from 'read-package-up';
 import semver from 'semver';
 import * as ci from 'ci-info';
 import getBuiltinRule from './utils/get-builtin-rule.js';
+import {readPackageJson} from './shared/package-json.js';
 
 const baseRule = getBuiltinRule('no-warning-comments');
 
@@ -50,20 +50,9 @@
 
 /** @param {string} dirname */
 function getPackageHelpers(dirname) {
-	// We don't need to normalize the package.json data, because we are only using 2 properties and those 2 properties
-	// aren't validated by the normalization. But when this plugin is used in a monorepo, the name field in the
-	// package.json can be invalid and would make this plugin throw an error. See also #1871
-	/** @type {readPkgUp.ReadResult | undefined} */
-	let packageResult;
-	try {
-		packageResult = readPackageUpSync({normalize: false, cwd: dirname});
-	} catch {
-		// This can happen if package.json files have comments in them etc.
-		packageResult = undefined;
-	}
-
-	const hasPackage = Boolean(packageResult);
-	const packageJson = packageResult ? packageResult.packageJson : {};
+	const packageJsonResult = readPackageJson(dirname);
+	const packageJson = packageJsonResult?.packageJson ?? {};
+	const hasPackage = Boolean(packageJsonResult);
 
 	const packageDependencies = {
 		...packageJson.dependencies,
@@ -187,7 +176,7 @@
 	}
 
 	return {
-		packageResult,
+		packageResult: packageJsonResult,
 		hasPackage,
 		packageJson,
 		packageDependencies,
@@ -328,7 +317,7 @@
 	});
 	const rules = baseRule.create(fakeContext);
 
 	function processComment(comment) {
 		if (ignoreRegexes.some(ignore => ignore.test(comment.value))) {
 			return;
 		}

rules/no-unnecessary-polyfills.js

@@ -1,8 +1,8 @@
 import path from 'node:path';
-import {readPackageUpSync} from 'read-package-up';
 import coreJsCompat from 'core-js-compat';
 import {camelCase} from './utils/lodash.js';
 import isStaticRequire from './ast/is-static-require.js';
+import {readPackageJson} from './shared/package-json.js';
 
 const {data: compatData, entries: coreJsEntries} = coreJsCompat;
 
@@ -57,18 +57,13 @@ function getTargets(options, dirname) {
 		return options.targets;
 	}
 
-	/** @type {readPkgUp.ReadResult | undefined} */
-	let packageResult;
-	try {
-		// It can fail if, for example, the package.json file has comments.
-		packageResult = readPackageUpSync({normalize: false, cwd: dirname});
-	} catch {}
+	const packageJsonResult = readPackageJson(dirname);
 
-	if (!packageResult) {
+	if (!packageJsonResult) {
 		return;
 	}
 
-	const {browserslist, engines} = packageResult.packageJson;
+	const {browserslist, engines} = packageJsonResult.packageJson;
 	return browserslist ?? engines;
 }
 

rules/shared/package-json.js

@@ -0,0 +1,42 @@
+import fs from 'node:fs';
+import {findUpSync} from 'find-up-simple';
+
+const directoryCache = new Map();
+const dataCache = new Map();
+
+/**
+Finds the closest package.json file to the given directory and returns its path and contents.
+
+Caches the result for future lookups.
+
+@param dirname {string}
+@return {{ path: string, packageJson: Record<string, unknown> } | undefined}
+*/
+export function readPackageJson(dirname) {
+	let packageJsonPath;
+	if (directoryCache.has(dirname)) {
+		packageJsonPath = directoryCache.get(dirname);
+	} else {
+		packageJsonPath = findUpSync('package.json', {cwd: dirname, type: 'file'});
+		directoryCache.set(dirname, packageJsonPath);
+	}
+
+	if (!packageJsonPath) {
+		return;
+	}
+
+	let packageJson;
+	if (dataCache.has(packageJsonPath)) {
+		packageJson = dataCache.get(packageJsonPath);
+	} else {
+		try {
+			packageJson = JSON.parse(fs.readFileSync(packageJsonPath));
+			dataCache.set(packageJsonPath, packageJson);
+		} catch {
+			// This can happen if package.json files have comments in them etc.
+			return;
+		}
+	}
+
+	return {path: packageJsonPath, packageJson};
+}

test/expiring-todo-comments.js

@@ -60,16 +60,16 @@ test({
 		},
 		'// Expire Condition [2000-01-01]: new term name',
 		'// TODO [>2000]: We sure didnt past this version',
-		'// TODO [-read-package-up]: We actually use this.',
+		'// TODO [-find-up-simple]: We actually use this.',
 		'// TODO [+popura]: I think we wont need a broken package.',
 		'// TODO [semver@>1000]: Welp hopefully we wont get at that.',
 		'// TODO [semver@>=1000]: Welp hopefully we wont get at that.',
 		'// TODO [@lubien/fixture-beta-package@>=1.0.0]: we are using a pre-release',
 		'// TODO [@lubien/fixture-beta-package@>=1.0.0-gamma.1]: beta comes first from gamma',
 		'// TODO [@lubien/fixture-beta-package@>=1.0.0-beta.2]: we are in beta.1',
-		'// TODO [2200-12-12, -read-package-up]: Combo',
-		'// TODO [2200-12-12, -read-package-up, +popura]: Combo',
-		'// TODO [2200-12-12, -read-package-up, +popura, semver@>=1000]: Combo',
+		'// TODO [2200-12-12, -find-up-simple]: Combo',
+		'// TODO [2200-12-12, -find-up-simple, +popura]: Combo',
+		'// TODO [2200-12-12, -find-up-simple, +popura, semver@>=1000]: Combo',
 		'// TODO [engine:node@>=100]: When we start supporting only >= 10',
 		`// TODO [2200-12-12]: Multiple
 		// TODO [2200-12-12]: Lines`,
@@ -209,24 +209,24 @@ test({
 			errors: [reachedPackageVersionError('>=1', 'if your package.json version is >=1')],
 		},
 		{
-			code: '// TODO [+read-package-up]: when you install `read-package-up`',
-			errors: [havePackageError('read-package-up', 'when you install `read-package-up`')],
+			code: '// TODO [+find-up-simple]: when you install `find-up-simple`',
+			errors: [havePackageError('find-up-simple', 'when you install `find-up-simple`')],
 		},
 		{
 			code: '// TODO [-popura]: when you uninstall `popura`',
 			errors: [dontHavePackageError('popura', 'when you uninstall `popura`')],
 		},
 		{
-			code: '// TODO [read-package-up@>1]: when `read-package-up` version is > 1',
-			errors: [versionMatchesError('read-package-up > 1', 'when `read-package-up` version is > 1')],
+			code: '// TODO [find-up-simple@>=1]: when `find-up-simple` version is >= 1',
+			errors: [versionMatchesError('find-up-simple >= 1', 'when `find-up-simple` version is >= 1')],
 		},
 		{
 			code: '// TODO [engine:node@>=8]: when support is for node >= 8',
 			errors: [engineMatchesError('node>=8', 'when support is for node >= 8')],
 		},
 		{
-			code: '// TODO [read-package-up@>=5.1.1]: when `read-package-up` version is >= 5.1.1',
-			errors: [versionMatchesError('read-package-up >= 5.1.1', 'when `read-package-up` version is >= 5.1.1')],
+			code: '// TODO [find-up-simple@>0.2.0]: when `find-up-simple` version is > 0.2.0',
+			errors: [versionMatchesError('find-up-simple > 0.2.0', 'when `find-up-simple` version is > 0.2.0')],
 		},
 		{
 			code: '// TODO [@lubien/fixture-beta-package@>=1.0.0-alfa.1]: when `@lubien/fixture-beta-package` version is >= 1.0.0-alfa.1',
@@ -323,16 +323,16 @@ test({
 			],
 		},
 		{
-			code: '// TODO [-popura, read-package-up@>1]: Combine not having a package with version match',
+			code: '// TODO [-popura, find-up-simple@>=1]: Combine not having a package with version match',
 			errors: [
 				dontHavePackageError('popura', 'Combine not having a package with version match'),
-				versionMatchesError('read-package-up > 1', 'Combine not having a package with version match'),
+				versionMatchesError('find-up-simple >= 1', 'Combine not having a package with version match'),
 			],
 		},
 		{
-			code: '// TODO [+read-package-up, -popura]: Combine presence/absence of packages',
+			code: '// TODO [+find-up-simple, -popura]: Combine presence/absence of packages',
 			errors: [
-				havePackageError('read-package-up', 'Combine presence/absence of packages'),
+				havePackageError('find-up-simple', 'Combine presence/absence of packages'),
 				dontHavePackageError('popura', 'Combine presence/absence of packages'),
 			],
 		},
@@ -352,13 +352,13 @@ test({
 			],
 		},
 		{
-			code: '// HUGETODO [semver @>=1, engine:node@>=8, 2000-01-01, -popura, >1, +read-package-up, read-package-up@>1]: Big mix',
+			code: '// HUGETODO [semver @>=1, engine:node@>=8, 2000-01-01, -popura, >1, +find-up-simple, find-up-simple@>=1]: Big mix',
 			errors: [
 				expiredTodoError('2000-01-01', 'Big mix'),
 				reachedPackageVersionError('>1', 'Big mix'),
 				dontHavePackageError('popura', 'Big mix'),
-				havePackageError('read-package-up', 'Big mix'),
-				versionMatchesError('read-package-up > 1', 'Big mix'),
+				havePackageError('find-up-simple', 'Big mix'),
+				versionMatchesError('find-up-simple >= 1', 'Big mix'),
 				engineMatchesError('node>=8', 'Big mix'),
 				removeWhitespaceError('semver @>=1', 'Big mix'),
 			],