do not write null sha1s to on-disk index

diff --git a/path.c b/path.c
index b6f71d1086981dc41bdbbc8954eccd9e9b719f98..6f2aa699ad63c2f7c65632761efbaebb7f461868 100644 (file)
--- a/path.c
+++ b/path.c
@@ -293,7 +293,7 @@ const char *enter_repo(const char *path, int strict)
 
        if (!strict) {
                static const char *suffix[] = {
-                       ".git/.git", "/.git", ".git", "", NULL,
+                       "/.git", "", ".git/.git", ".git", NULL,
                };
                const char *gitfile;
                int len = strlen(path);
@@ -324,8 +324,11 @@ const char *enter_repo(const char *path, int strict)
                        return NULL;
                len = strlen(used_path);
                for (i = 0; suffix[i]; i++) {
+                       struct stat st;
                        strcpy(used_path + len, suffix[i]);
-                       if (!access(used_path, F_OK)) {
+                       if (!stat(used_path, &st) &&
+                           (S_ISREG(st.st_mode) ||
+                           (S_ISDIR(st.st_mode) && is_git_directory(used_path)))) {
                                strcat(validated_path, suffix[i]);
                                break;
                        }