From 5fda1eb42cbb985db5482c64e34029746fba8ffb Mon Sep 17 00:00:00 2001
From: Kyle McMartin <kyle@redhat.com>
Date: Thu, 18 Jul 2013 20:10:36 -0400
Subject: [PATCH] generate-git-snapshot.sh: warn if $LINUX_GIT dir is unset

---
 scripts/generate-git-snapshot.sh | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/scripts/generate-git-snapshot.sh b/scripts/generate-git-snapshot.sh
index 239b846c9..b6fe0d6c1 100755
--- a/scripts/generate-git-snapshot.sh
+++ b/scripts/generate-git-snapshot.sh
@@ -2,6 +2,8 @@
 #
 # Set LINUX_GIT to point to an upstream Linux git tree in your .bashrc or wherever.
 
+[ ! -d "$LINUX_GIT" ] && echo "error: set \$LINUX_GIT to point at upstream git tree" && exit 1
+
 VER=$(grep patch sources | head -n1 | awk '{ print $2 }' | sed s/patch-// | sed s/-git.*// | sed s/.xz//)
 
 OLDGIT=$(grep gitrev kernel.spec | head -n1 | sed s/%define\ gitrev\ //)