1 files changed, 27 insertions, 0 deletions
diff --git a/git-sh-setup.sh b/git-sh-setup.sh
new file mode 100755
index 0000000000..06d8299ce0
--- /dev/null
+++ b/git-sh-setup.sh
@@ -0,0 +1,27 @@
+#!/bin/sh
+#
+# Set up GIT_DIR and GIT_OBJECT_DIRECTORY
+# and return true if everything looks ok
+#
+: ${GIT_DIR=.git}
+: ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}
+
+die() {
+	echo "$@" >&2
+	exit 1
+}
+
+check_clean_tree() {
+    dirty1_=`git-update-index -q --refresh` && {
+    dirty2_=`git-diff-index --name-only --cached HEAD`
+    case "$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" ]