From 1b79479fc01553cc688d8456b832650f84462bb8 Mon Sep 17 00:00:00 2001
From: Meghan Denny <hello@nektro.net>
Date: Mon, 15 Apr 2024 02:12:07 -0700
Subject: [PATCH] astro/cli/install-package.ts: whichPm may return null if ran
 in an empty directory (#10782)

---
 .changeset/many-hairs-jump.md             | 5 +++++
 packages/astro/src/cli/install-package.ts | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)
 create mode 100644 .changeset/many-hairs-jump.md

diff --git a/.changeset/many-hairs-jump.md b/.changeset/many-hairs-jump.md
new file mode 100644
index 000000000000..2e855708fb89
--- /dev/null
+++ b/.changeset/many-hairs-jump.md
@@ -0,0 +1,5 @@
+---
+"astro": patch
+---
+
+Handles possible null value when calling `which-pm` during dynamic package installation
diff --git a/packages/astro/src/cli/install-package.ts b/packages/astro/src/cli/install-package.ts
index 02e856846484..7c8601e48a8c 100644
--- a/packages/astro/src/cli/install-package.ts
+++ b/packages/astro/src/cli/install-package.ts
@@ -101,7 +101,7 @@ async function installPackage(
 	logger: Logger
 ): Promise<boolean> {
 	const cwd = options.cwd ?? process.cwd();
-	const packageManager = (await whichPm(cwd)).name ?? 'npm';
+	const packageManager = (await whichPm(cwd))?.name ?? 'npm';
 	const installCommand = getInstallCommand(packageNames, packageManager);
 
 	if (!installCommand) {