1 files changed, 38 insertions, 0 deletions
diff --git a/packages/integrations/vercel/src/lib/nft.ts b/packages/integrations/vercel/src/lib/nft.ts
new file mode 100644
index 000000000..d88429714
--- /dev/null
+++ b/packages/integrations/vercel/src/lib/nft.ts
@@ -0,0 +1,38 @@
+import * as fs from 'node:fs/promises';
+import { fileURLToPath } from 'node:url';
+import { nodeFileTrace } from '@vercel/nft';
+
+export async function copyDependenciesToFunction(
+	root: URL,
+	functionFolder: URL,
+	serverEntry: string
+) {
+	const entryPath = fileURLToPath(new URL(`./${serverEntry}`, functionFolder));
+
+	const result = await nodeFileTrace([entryPath], {
+		base: fileURLToPath(root),
+	});
+
+	for (const file of result.fileList) {
+		if (file.startsWith('.vercel/')) continue;
+		const origin = new URL(file, root);
+		const dest = new URL(file, functionFolder);
+
+		const meta = await fs.stat(origin);
+		const isSymlink = (await fs.lstat(origin)).isSymbolicLink();
+
+		// Create directories recursively
+		if (meta.isDirectory() && !isSymlink) {
+			await fs.mkdir(new URL('..', dest), { recursive: true });
+		} else {
+			await fs.mkdir(new URL('.', dest), { recursive: true });
+		}
+
+		if (isSymlink) {
+			const link = await fs.readlink(origin);
+			await fs.symlink(link, dest, meta.isDirectory() ? 'dir' : 'file');
+		} else {
+			await fs.copyFile(origin, dest);
+		}
+	}
+}