ref-filter: limit traversal to prefix

diff --git a/refs.c b/refs.c
index b3860a9e333b7b0fc284b7794a2d40ea621eb638..f0685c92513e306188d89380a1c3020024a4edb4 100644 (file)
--- a/refs.c
+++ b/refs.c
@@ -1259,6 +1259,11 @@ struct ref_iterator *refs_ref_iterator_begin(
 {
        struct ref_iterator *iter;
 
+       if (ref_paranoia < 0)
+               ref_paranoia = git_env_bool("GIT_REF_PARANOIA", 0);
+       if (ref_paranoia)
+               flags |= DO_FOR_EACH_INCLUDE_BROKEN;
+
        iter = refs->be->iterator_begin(refs, prefix, flags);
 
        /*
@@ -1702,6 +1707,29 @@ int create_symref(const char *ref_target, const char *refs_heads_master,
                                  refs_heads_master, logmsg);
 }
 
+int ref_update_reject_duplicates(struct string_list *refnames,
+                                struct strbuf *err)
+{
+       size_t i, n = refnames->nr;
+
+       assert(err);
+
+       for (i = 1; i < n; i++) {
+               int cmp = strcmp(refnames->items[i - 1].string,
+                                refnames->items[i].string);
+
+               if (!cmp) {
+                       strbuf_addf(err,
+                                   "multiple updates for ref '%s' not allowed.",
+                                   refnames->items[i].string);
+                       return 1;
+               } else if (cmp > 0) {
+                       die("BUG: ref_update_reject_duplicates() received unsorted list");
+               }
+       }
+       return 0;
+}
+
 int ref_transaction_prepare(struct ref_transaction *transaction,
                            struct strbuf *err)
 {