feat: synchronous API (#5)

src/index.ts

@@ -1,7 +1,7 @@
 import _fs from 'fs';
 import path from 'path';
 import type { PackageJson } from 'type-fest';
-import { getAllFiles } from './utils/get-all-files.js';
+import { getAllFiles, getAllFilesSync } from './utils/get-all-files.js';
 import { createPathMatcher, pathMatches, type PathMatcher } from './utils/path-matcher.js';
 import { STAR } from './utils/constants.js';
 
@@ -197,18 +197,10 @@ const legacyCondition = (
 	filePath: string,
 ) => [[['default'], filePath] as ConditionToPath];
 
-export const getPackageEntryPoints = async (
-	packagePath: string,
-	fs = _fs.promises,
-): Promise<PackageEntryPoints> => {
-	const packageJsonString = await fs.readFile(path.join(packagePath, 'package.json'), 'utf8');
-	const packageJson = JSON.parse(packageJsonString) as PackageJson;
-	const packageFiles = await getAllFiles(fs, packagePath);
-
-	if (packageJson.exports !== undefined) {
-		return analyzeExportsWithFiles(packageJson.exports, packageFiles);
-	}
-
+const analyzeLegacyExports = (
+	packageJson: PackageJson,
+	packageFiles: string[],
+): PackageEntryPoints => {
 	const jsExtension = /\.(?:json|[cm]?js|d\.ts)$/;
 	const legacyExports = Object.fromEntries(
 		packageFiles
@@ -235,3 +227,33 @@ export const getPackageEntryPoints = async (
 
 	return legacyExports;
 };
+
+export const getPackageEntryPoints = async (
+	packagePath: string,
+	fs = _fs.promises,
+): Promise<PackageEntryPoints> => {
+	const packageJsonString = await fs.readFile(path.join(packagePath, 'package.json'), 'utf8');
+	const packageJson = JSON.parse(packageJsonString) as PackageJson;
+	const packageFiles = await getAllFiles(fs, packagePath);
+
+	if (packageJson.exports !== undefined) {
+		return analyzeExportsWithFiles(packageJson.exports, packageFiles);
+	}
+
+	return analyzeLegacyExports(packageJson, packageFiles);
+};
+
+export const getPackageEntryPointsSync = (
+	packagePath: string,
+	fs = _fs,
+): PackageEntryPoints => {
+	const packageJsonString = fs.readFileSync(path.join(packagePath, 'package.json'), 'utf8');
+	const packageJson = JSON.parse(packageJsonString) as PackageJson;
+	const packageFiles = getAllFilesSync(fs, packagePath);
+
+	if (packageJson.exports !== undefined) {
+		return analyzeExportsWithFiles(packageJson.exports, packageFiles);
+	}
+
+	return analyzeLegacyExports(packageJson, packageFiles);
+};

src/utils/get-all-files.ts

@@ -31,3 +31,32 @@ export const getAllFiles = async (
 
 	return fileTree.flat();
 };
+
+export const getAllFilesSync = (
+	fs: Pick<typeof _fs, 'readdirSync' | 'statSync'>,
+	directoryPath: string,
+	dontShortenPath?: boolean,
+): string[] => {
+	const directoryFiles = fs.readdirSync(directoryPath);
+	const fileTree = directoryFiles.map((fileName) => {
+		const filePath = path.join(directoryPath, fileName);
+		const stat = fs.statSync(filePath);
+
+		if (stat.isDirectory()) {
+			const files = getAllFilesSync(fs, filePath, true);
+			return (
+				dontShortenPath
+					? files
+					: files.map(file => `./${path.relative(directoryPath, file)}`)
+			);
+		}
+
+		return (
+			dontShortenPath
+				? filePath
+				: `./${path.relative(directoryPath, filePath)}`
+		);
+	});
+
+	return fileTree.flat();
+};