fix: handle existing broken symlinks

src/utils/fs-exists.ts

@@ -1,8 +1,9 @@
 import fs from 'fs';
 
+// Checks if symlink file exists
 export const fsExists = (
 	path: string,
-) => fs.promises.access(path).then(
+) => fs.promises.lstat(path).then(
 	() => true,
 	() => false,
 );

src/utils/symlink.ts

@@ -8,7 +8,7 @@ export async function symlink(
 	type?: string,
 ) {
 	if (await fsExists(symlinkPath)) {
-		const symlinkRealpath = await fs.promises.realpath(symlinkPath);
+		const symlinkRealpath = await fs.promises.realpath(symlinkPath).catch(() => null);
 
 		if (targetPath === symlinkRealpath) {
 			return;

tests/specs/cli.ts

@@ -59,6 +59,46 @@ export default testSuite(({ describe }, nodePath: string) => {
 
 				await fixture.rm();
 			});
+
+			test('symlink exists', async () => {
+				const fixture = await createFixture('./tests/fixtures/');
+				const packageEntryPath = path.join(fixture.path, 'package-entry');
+
+				await fs.promises.mkdir(path.join(packageEntryPath, 'node_modules'));
+				await fs.promises.symlink(
+					'../../package-files',
+					path.join(packageEntryPath, 'node_modules/package-files'),
+				);
+
+				const linkProcess = await link(['../package-files'], {
+					cwd: packageEntryPath,
+					nodePath,
+				});
+
+				expect(linkProcess.exitCode).toBe(0);
+
+				await fixture.rm();
+			});
+
+			test('broken symlink exists', async () => {
+				const fixture = await createFixture('./tests/fixtures/');
+				const packageEntryPath = path.join(fixture.path, 'package-entry');
+
+				await fs.promises.mkdir(path.join(packageEntryPath, 'node_modules'));
+				await fs.promises.symlink(
+					'../broken-symlink/../../package-files',
+					path.join(packageEntryPath, 'node_modules/package-files'),
+				);
+
+				const linkProcess = await link(['../package-files'], {
+					cwd: path.join(fixture.path, 'package-entry'),
+					nodePath,
+				});
+
+				expect(linkProcess.exitCode).toBe(0);
+
+				await fixture.rm();
+			});
 		});
 
 		test('consecutive links', async () => {