push: enhance unspecified push default warning

diff --git a/read-cache.c b/read-cache.c
index 885943a6df77da646481c34d2876d7fdaa5c12b8..33dd676ccbbd24e0bace49347f1f5d81b5099bcc 100644 (file)
--- a/read-cache.c
+++ b/read-cache.c
@@ -643,7 +643,7 @@ int add_to_index(struct index_state *istate, const char *path, struct stat *st,
                        if (*ptr == '/') {
                                struct cache_entry *foundce;
                                ++ptr;
-                               foundce = index_name_exists(istate, ce->name, ptr - ce->name, ignore_case);
+                               foundce = index_dir_exists(istate, ce->name, ptr - ce->name - 1);
                                if (foundce) {
                                        memcpy((void *)startPtr, foundce->name + (startPtr - ce->name), ptr - startPtr);
                                        startPtr = ptr;
@@ -652,7 +652,7 @@ int add_to_index(struct index_state *istate, const char *path, struct stat *st,
                }
        }
 
-       alias = index_name_exists(istate, ce->name, ce_namelen(ce), ignore_case);
+       alias = index_file_exists(istate, ce->name, ce_namelen(ce), ignore_case);
        if (alias && !ce_stage(alias) && !ie_match_stat(istate, alias, st, ce_option)) {
                /* Nothing changed, really */
                free(ce);
@@ -1818,8 +1818,17 @@ int write_index(struct index_state *istate, int newfd)
                        continue;
                if (!ce_uptodate(ce) && is_racy_timestamp(istate, ce))
                        ce_smudge_racily_clean_entry(ce);
-               if (is_null_sha1(ce->sha1))
-                       return error("cache entry has null sha1: %s", ce->name);
+               if (is_null_sha1(ce->sha1)) {
+                       static const char msg[] = "cache entry has null sha1: %s";
+                       static int allow = -1;
+
+                       if (allow < 0)
+                               allow = git_env_bool("GIT_ALLOW_NULL_SHA1", 0);
+                       if (allow)
+                               warning(msg, ce->name);
+                       else
+                               return error(msg, ce->name);
+               }
                if (ce_write_entry(&c, newfd, ce, previous_name) < 0)
                        return -1;
        }