1 files changed, 11 insertions, 0 deletions
diff --git a/git-sh-setup-script b/git-sh-setup-script
index 84e15df1bc..9ed5e85152 100755
--- a/git-sh-setup-script
+++ b/git-sh-setup-script
@@ -11,6 +11,17 @@ die() {
 	exit 1
 }
 
+check_clean_tree() {
+    dirty1_=`git-update-cache -q --refresh` && {
+    dirty2_=`git-diff-cache --name-only --cached HEAD`
+    case "$dirty2_" in '') : ;; *) (exit 1) ;; esac
+    } || {
+	echo >&2 "$dirty1_"
+	echo "$dirty2_" | sed >&2 -e 's/^/modified: /'
+	(exit 1)
+    }
+}
+
 [ -h "$GIT_DIR/HEAD" ] &&
 [ -d "$GIT_DIR/refs" ] &&
 [ -d "$GIT_OBJECT_DIRECTORY/00" ]