1 files changed, 16 insertions, 0 deletions
diff --git a/setup.c b/setup.c
index 145eca50f4..43cd3f94ea 100644
--- a/setup.c
+++ b/setup.c
@@ -206,6 +206,22 @@ static const char *set_work_tree(const char *dir)
 	return NULL;
 }
 
+void setup_work_tree(void)
+{
+	const char *work_tree, *git_dir;
+	static int initialized = 0;
+
+	if (initialized)
+		return;
+	work_tree = get_git_work_tree();
+	git_dir = get_git_dir();
+	if (!is_absolute_path(git_dir))
+		set_git_dir(make_absolute_path(git_dir));
+	if (!work_tree || chdir(work_tree))
+		die("This operation must be run in a work tree");
+	initialized = 1;
+}
+
 /*
  * We cannot decide in this function whether we are in the work tree or
  * not, since the config can only be read _after_ this function was called.