Merge branch 'nd/fetch-multi-gc-once'

"git fetch" that grabs from a group of remotes learned to run the
auto-gc only once at the very end.

* nd/fetch-multi-gc-once:
fetch: only run 'gc' once when fetching multiple remotes

diff --combined builtin/fetch.c
index c9b92b1e52448bb1537a229b3ed7d1587db28ecf,6a3c5078974d553447c6468032408f99e76cc57d..667f2cec7bdcc1bd5bf6f0f99d0dc39ff4071b98
--- 1/builtin/fetch.c
--- 2/builtin/fetch.c
+++ b/builtin/fetch.c
@@@ -48,6 -48,7 +48,7 @@@ static int prune_tags = -1; /* unspecif
  
  static int all, append, dry_run, force, keep, multiple, update_head_ok, verbosity, deepen_relative;
  static int progress = -1;
+ static int enable_auto_gc = 1;
  static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
  static int max_children = 1;
  static enum transport_family family;
@@@ -169,6 -170,8 +170,8 @@@ static struct option builtin_fetch_opti
        OPT_STRING_LIST(0, "negotiation-tip", &negotiation_tip, N_("revision"),
                        N_("report that we have only objects reachable from this object")),
        OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
+       OPT_BOOL(0, "auto-gc", &enable_auto_gc,
+                N_("run 'gc --auto' after fetching")),
        OPT_END()
  };
  
@@@ -239,7 -242,6 +242,7 @@@ static int will_fetch(struct ref **head
  struct refname_hash_entry {
        struct hashmap_entry ent; /* must be the first member */
        struct object_id oid;
 +      int ignore;
        char refname[FLEX_ARRAY];
  };
  
@@@ -288,11 -290,6 +291,11 @@@ static int refname_hash_exists(struct h
        return !!hashmap_get_from_hash(map, strhash(refname), refname);
  }
  
 +static void clear_item(struct refname_hash_entry *item)
 +{
 +      item->ignore = 1;
 +}
 +
  static void find_non_local_tags(const struct ref *refs,
                                struct ref **head,
                                struct ref ***tail)
@@@ -325,7 -322,7 +328,7 @@@
                            !will_fetch(head, ref->old_oid.hash) &&
                            !has_object_file_with_flags(&item->oid, OBJECT_INFO_QUICK) &&
                            !will_fetch(head, item->oid.hash))
 -                              oidclr(&item->oid);
 +                              clear_item(item);
                        item = NULL;
                        continue;
                }
@@@ -339,7 -336,7 +342,7 @@@
                if (item &&
                    !has_object_file_with_flags(&item->oid, OBJECT_INFO_QUICK) &&
                    !will_fetch(head, item->oid.hash))
 -                      oidclr(&item->oid);
 +                      clear_item(item);
  
                item = NULL;
  
@@@ -360,7 -357,7 +363,7 @@@
        if (item &&
            !has_object_file_with_flags(&item->oid, OBJECT_INFO_QUICK) &&
            !will_fetch(head, item->oid.hash))
 -              oidclr(&item->oid);
 +              clear_item(item);
  
        /*
         * For all the tags in the remote_refs_list,
@@@ -368,21 -365,19 +371,21 @@@
         */
        for_each_string_list_item(remote_ref_item, &remote_refs_list) {
                const char *refname = remote_ref_item->string;
 +              struct ref *rm;
  
                item = hashmap_get_from_hash(&remote_refs, strhash(refname), refname);
                if (!item)
                        BUG("unseen remote ref?");
  
                /* Unless we have already decided to ignore this item... */
 -              if (!is_null_oid(&item->oid)) {
 -                      struct ref *rm = alloc_ref(item->refname);
 -                      rm->peer_ref = alloc_ref(item->refname);
 -                      oidcpy(&rm->old_oid, &item->oid);
 -                      **tail = rm;
 -                      *tail = &rm->next;
 -              }
 +              if (item->ignore)
 +                      continue;
 +
 +              rm = alloc_ref(item->refname);
 +              rm->peer_ref = alloc_ref(item->refname);
 +              oidcpy(&rm->old_oid, &item->oid);
 +              **tail = rm;
 +              *tail = &rm->next;
        }
        hashmap_free(&remote_refs, 1);
        string_list_clear(&remote_refs_list, 0);
@@@ -1432,7 -1427,7 +1435,7 @@@ static int fetch_multiple(struct string
                        return errcode;
        }
  
-       argv_array_pushl(&argv, "fetch", "--append", NULL);
+       argv_array_pushl(&argv, "fetch", "--append", "--no-auto-gc", NULL);
        add_options_to_argv(&argv);
  
        for (i = 0; i < list->nr; i++) {
@@@ -1680,13 -1675,15 +1683,15 @@@ int cmd_fetch(int argc, const char **ar
  
        string_list_clear(&list, 0);
  
 -      close_all_packs(the_repository->objects);
 +      close_object_store(the_repository->objects);
  
-       argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
-       if (verbosity < 0)
-               argv_array_push(&argv_gc_auto, "--quiet");
-       run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
-       argv_array_clear(&argv_gc_auto);
+       if (enable_auto_gc) {
+               argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
+               if (verbosity < 0)
+                       argv_array_push(&argv_gc_auto, "--quiet");
+               run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
+               argv_array_clear(&argv_gc_auto);
+       }
  
        return result;
  }