+/*
+ * Test it it looks like we're at the top
+ * level git directory. We want to see a
+ *
+ * - a HEAD symlink and a refs/ directory under ".git"
+ * - either a .git/objects/ directory _or_ the proper
+ * GIT_OBJECT_DIRECTORY environment variable
+ */
+static int is_toplevel_directory(void)
+{
+ struct stat st;
+
+ return !lstat(".git/HEAD", &st) &&
+ S_ISLNK(st.st_mode) &&
+ !access(".git/refs/", X_OK) &&
+ (getenv(DB_ENVIRONMENT) || !access(".git/objects/", X_OK));
+}
+