From 9957ee5fd689792ff18194bec2a4bc7f4db70d61 Mon Sep 17 00:00:00 2001
From: Weijia Wang <9713184+wegank@users.noreply.github.com>
Date: Mon, 9 Jan 2023 13:08:37 +0100
Subject: [PATCH] darwin: add usage to generate-sdk-packages.sh

---
 .../apple-source-releases/generate-sdk-packages.sh   | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/pkgs/os-specific/darwin/apple-source-releases/generate-sdk-packages.sh b/pkgs/os-specific/darwin/apple-source-releases/generate-sdk-packages.sh
index 69410ed4746f..418a1d625d6a 100755
--- a/pkgs/os-specific/darwin/apple-source-releases/generate-sdk-packages.sh
+++ b/pkgs/os-specific/darwin/apple-source-releases/generate-sdk-packages.sh
@@ -1,8 +1,16 @@
 #!/usr/bin/env nix-shell
 #!nix-shell -i bash -p curl jq
 
-# usage:
-#   generate-sdk-packages.sh macos 11.0.1
+usage() {
+    cat <<EOF
+usage: $0 macos 11.0.1
+EOF
+}
+
+if [ "$#" != 2 ]; then
+    usage
+    exit 1
+fi
 
 cd $(dirname "$0")