setup_git_env: avoid blind fall-back to ".git"

diff --git a/environment.c b/environment.c
index cdc097f80c4b876818fbe28dc1cc1a54cde68902..6a8e0c2d1b23e67a17158fc995c2acdc4a954c8d 100644 (file)
--- a/environment.c
+++ b/environment.c
@@ -167,8 +167,11 @@ static void setup_git_env(void)
        const char *replace_ref_base;
 
        git_dir = getenv(GIT_DIR_ENVIRONMENT);
-       if (!git_dir)
+       if (!git_dir) {
+               if (!startup_info->have_repository)
+                       die("BUG: setup_git_env called without repository");
                git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
+       }
        gitfile = read_gitfile(git_dir);
        git_dir = xstrdup(gitfile ? gitfile : git_dir);
        if (get_common_dir(&sb, git_dir))