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authorJonathan Tan <jonathantanmy@google.com>2022-10-05 00:13:41 +0300
committerJunio C Hamano <gitster@pobox.com>2022-10-05 21:06:53 +0300
commit301f1e3ac1531dc3a15064a06b24fa98f02a3b78 (patch)
tree7c6a16c1ec7d57dadd06fed09fb57bf8d4bf1523 /promisor-remote.c
parent00057bf14c9269cb26a6b8ba7e8bc9ecd634d22c (diff)
promisor-remote: die upon failing fetch
In a partial clone, an attempt to read a missing object results in an attempt to fetch that single object. In order to avoid multiple sequential fetches, which would occur when multiple objects are missing (which is the typical case), some commands have been taught to prefetch in a batch: such a command would, in a partial clone, notice that several objects that it will eventually need are missing, and call promisor_remote_get_direct() with all such objects at once. When this batch prefetch fails, these commands fall back to the sequential fetches. But at $DAYJOB we have noticed that this results in a bad user experience: a command would take unexpectedly long to finish (and possibly use up a lot of bandwidth) if the batch prefetch would fail for some intermittent reason, but all subsequent fetches would work. It would be a better user experience for such a command would just fail. Therefore, make it a fatal error if the prefetch fails and at least one object being fetched is known to be a promisor object. (The latter criterion is to make sure that we are not misleading the user that such an object would be present from the promisor remote. For example, a missing object may be a result of repository corruption and not because it is expectedly missing due to the repository being a partial clone.) Signed-off-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'promisor-remote.c')
-rw-r--r--promisor-remote.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/promisor-remote.c b/promisor-remote.c
index 8b4d650b4c..faa7612941 100644
--- a/promisor-remote.c
+++ b/promisor-remote.c
@@ -4,6 +4,7 @@
#include "config.h"
#include "transport.h"
#include "strvec.h"
+#include "packfile.h"
struct promisor_remote_config {
struct promisor_remote *promisors;
@@ -238,6 +239,7 @@ void promisor_remote_get_direct(struct repository *repo,
struct object_id *remaining_oids = (struct object_id *)oids;
int remaining_nr = oid_nr;
int to_free = 0;
+ int i;
if (oid_nr == 0)
return;
@@ -255,9 +257,16 @@ void promisor_remote_get_direct(struct repository *repo,
continue;
}
}
- break;
+ goto all_fetched;
+ }
+
+ for (i = 0; i < remaining_nr; i++) {
+ if (is_promisor_object(&remaining_oids[i]))
+ die(_("could not fetch %s from promisor remote"),
+ oid_to_hex(&remaining_oids[i]));
}
+all_fetched:
if (to_free)
free(remaining_oids);
}