revert: do not remove state until sequence is finished

diff --git a/builtin/fetch.c b/builtin/fetch.c
index 9d481f8ca9d9470311b356e9bd5356fa362ffd6a..91731b909aeb22bf8d4e366b8b92281ac0f9ac0c 100644 (file)
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -13,6 +13,7 @@
 #include "sigchain.h"
 #include "transport.h"
 #include "submodule.h"
+#include "connected.h"
 
 static const char * const builtin_fetch_usage[] = {
        "git fetch [<options>] [<repository> [<refspec>...]]",
@@ -345,6 +346,18 @@ static int update_local_ref(struct ref *ref,
        }
 }
 
+static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
+{
+       struct ref **rm = cb_data;
+       struct ref *ref = *rm;
+
+       if (!ref)
+               return -1; /* end of the list */
+       *rm = ref->next;
+       hashcpy(sha1, ref->old_sha1);
+       return 0;
+}
+
 static int store_updated_refs(const char *raw_url, const char *remote_name,
                struct ref *ref_map)
 {
@@ -364,6 +377,13 @@ static int store_updated_refs(const char *raw_url, const char *remote_name,
                url = transport_anonymize_url(raw_url);
        else
                url = xstrdup("foreign");
+
+       rm = ref_map;
+       if (check_everything_connected(iterate_ref_map, 0, &rm)) {
+               rc = error(_("%s did not send all necessary objects\n"), url);
+               goto abort;
+       }
+
        for (rm = ref_map; rm; rm = rm->next) {
                struct ref *ref = NULL;
 
@@ -444,12 +464,15 @@ static int store_updated_refs(const char *raw_url, const char *remote_name,
                                fprintf(stderr, " %s\n", note);
                }
        }
-       free(url);
-       fclose(fp);
+
        if (rc & STORE_REF_ERROR_DF_CONFLICT)
                error(_("some local refs could not be updated; try running\n"
                      " 'git remote prune %s' to remove any old, conflicting "
                      "branches"), remote_name);
+
+ abort:
+       free(url);
+       fclose(fp);
        return rc;
 }
 
@@ -457,23 +480,10 @@ static int store_updated_refs(const char *raw_url, const char *remote_name,
  * We would want to bypass the object transfer altogether if
  * everything we are going to fetch already exists and is connected
  * locally.
- *
- * The refs we are going to fetch are in ref_map.  If running
- *
- *  $ git rev-list --objects --stdin --not --all
- *
- * (feeding all the refs in ref_map on its standard input)
- * does not error out, that means everything reachable from the
- * refs we are going to fetch exists and is connected to some of
- * our existing refs.
  */
 static int quickfetch(struct ref *ref_map)
 {
-       struct child_process revlist;
-       struct ref *ref;
-       int err;
-       const char *argv[] = {"rev-list",
-               "--quiet", "--objects", "--stdin", "--not", "--all", NULL};
+       struct ref *rm = ref_map;
 
        /*
         * If we are deepening a shallow clone we already have these
@@ -484,47 +494,7 @@ static int quickfetch(struct ref *ref_map)
         */
        if (depth)
                return -1;
-
-       if (!ref_map)
-               return 0;
-
-       memset(&revlist, 0, sizeof(revlist));
-       revlist.argv = argv;
-       revlist.git_cmd = 1;
-       revlist.no_stdout = 1;
-       revlist.no_stderr = 1;
-       revlist.in = -1;
-
-       err = start_command(&revlist);
-       if (err) {
-               error(_("could not run rev-list"));
-               return err;
-       }
-
-       /*
-        * If rev-list --stdin encounters an unknown commit, it terminates,
-        * which will cause SIGPIPE in the write loop below.
-        */
-       sigchain_push(SIGPIPE, SIG_IGN);
-
-       for (ref = ref_map; ref; ref = ref->next) {
-               if (write_in_full(revlist.in, sha1_to_hex(ref->old_sha1), 40) < 0 ||
-                   write_str_in_full(revlist.in, "\n") < 0) {
-                       if (errno != EPIPE && errno != EINVAL)
-                               error(_("failed write to rev-list: %s"), strerror(errno));
-                       err = -1;
-                       break;
-               }
-       }
-
-       if (close(revlist.in)) {
-               error(_("failed to close rev-list's stdin: %s"), strerror(errno));
-               err = -1;
-       }
-
-       sigchain_pop(SIGPIPE);
-
-       return finish_command(&revlist) || err;
+       return check_everything_connected(iterate_ref_map, 1, &rm);
 }
 
 static int fetch_refs(struct transport *transport, struct ref *ref_map)