From a49cc56d631eb6e08bf18c7e84794d00cfff2c11 Mon Sep 17 00:00:00 2001
From: Shuhao Wu <shuhao@shuhaowu.com>
Date: Mon, 9 Oct 2023 20:18:27 -0400
Subject: [PATCH] Fixed build script

---
 exercise3-2/build.sh | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/exercise3-2/build.sh b/exercise3-2/build.sh
index 9127896..97d0fe2 100755
--- a/exercise3-2/build.sh
+++ b/exercise3-2/build.sh
@@ -1,4 +1,7 @@
 #!/bin/bash
 
-tar xzf /opt/exercise3-2-build-output.tar.gz
+if [ ! -d build ]; then
+  tar xzf /opt/exercise3-2-build-output.tar.gz
+fi
+
 colcon build