From 059a865170335cf1ce19fe062f32676cc773b8aa Mon Sep 17 00:00:00 2001
From: Lewis Carhart <lewis@trycomp.ai>
Date: Thu, 20 Aug 2026 16:29:06 -0400
Subject: [PATCH] fix(build-func): vendor peer deps needed by @nestjs/swagger
 at runtime

@nestjs/swagger, @nestjs/common, and @nestjs/core declare their runtime
deps as peerDependencies, so vendoring only followed `dependencies` and
missed reflect-metadata, class-transformer, class-validator, and rxjs.
The bundled function crashed with MODULE_NOT_FOUND on every request in
production. vendorDeps now walks non-optional peerDependencies too.

Verified by booting the built function locally against dev Postgres and
confirming GET /openapi.json returns 200 with a real document.
---
 apps/api/scripts/build-func.mjs | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/apps/api/scripts/build-func.mjs b/apps/api/scripts/build-func.mjs
index 7c10a9c1a..b06f0c017 100644
--- a/apps/api/scripts/build-func.mjs
+++ b/apps/api/scripts/build-func.mjs
@@ -30,7 +30,15 @@ const EXTERNALS = [
 	"cardinal",
 ];
 
-const VENDOR_ROOTS = ["express", "@nestjs/swagger", "reflect-metadata"];
+const VENDOR_ROOTS = [
+	"express",
+	"@nestjs/swagger",
+	"reflect-metadata",
+	"@nestjs/common",
+	"@nestjs/core",
+	"class-transformer",
+	"class-validator",
+];
 
 rmSync(outDir, { recursive: true, force: true });
 mkdirSync(funcDir, { recursive: true });
@@ -102,7 +110,18 @@ function vendorDeps(realDir, name, placedDir) {
 	} catch {
 		return;
 	}
-	for (const depName of Object.keys(pj.dependencies || {})) {
+	const optionalPeers = new Set(
+		Object.entries(pj.peerDependenciesMeta || {})
+			.filter(([, meta]) => meta.optional)
+			.map(([depName]) => depName),
+	);
+	const depNames = new Set([
+		...Object.keys(pj.dependencies || {}),
+		...Object.keys(pj.peerDependencies || {}).filter(
+			(depName) => !optionalPeers.has(depName),
+		),
+	]);
+	for (const depName of depNames) {
 		const depReal = resolveDep(realDir, name, depName);
 		if (!depReal) {
 			console.warn(`  ! not found: ${depName} (needed by ${name})`);