deref_tag() prints a warning if the object that a tag refers to does not
exist. However, when a partial clone has an annotated tag from its
promisor remote, but not the object that it refers to, printing a
warning on such a tag is incorrect.
This occurs, for example, when the checkout that happens after a partial
clone causes some objects to be fetched - and as part of the fetch, all
local refs are read. The test included in this patch demonstrates this
situation.
Therefore, do not print a warning in this case.
Signed-off-by: Jonathan Tan <jonathantanmy@xxxxxxxxxx>
---
t/t5616-partial-clone.sh | 9 +++++++--
tag.c | 13 ++++++++++---
2 files changed, 17 insertions(+), 5 deletions(-)
diff --git a/t/t5616-partial-clone.sh b/t/t5616-partial-clone.sh
index e8dfeafe7..bbbe7537d 100755
--- a/t/t5616-partial-clone.sh
+++ b/t/t5616-partial-clone.sh
@@ -229,9 +229,13 @@ test_expect_success 'when partial cloning, tolerate server not sending target of
git -C "$SERVER" tag -m message -a myblob "$BLOB" &&
# Craft a packfile including the tag, but not the blob it points to.
- printf "%s\n%s\n--not\n%s\n" \
+ # Also, omit objects referenced from HEAD in order to force a second
+ # fetch (to fetch missing objects) upon the automatic checkout that
+ # happens after a clone.
+ printf "%s\n%s\n--not\n%s\n%s\n" \
$(git -C "$SERVER" rev-parse HEAD) \
$(git -C "$SERVER" rev-parse myblob) \
+ $(git -C "$SERVER" rev-parse HEAD^{tree}) \
$(git -C "$SERVER" rev-parse myblob^{blob}) |
git -C "$SERVER" pack-objects --thin --stdout >incomplete.pack &&
@@ -249,7 +253,8 @@ test_expect_success 'when partial cloning, tolerate server not sending target of
# Exercise to make sure it works.
git -c protocol.version=2 clone \
- --filter=blob:none $HTTPD_URL/one_time_sed/server repo &&
+ --filter=blob:none $HTTPD_URL/one_time_sed/server repo 2> err &&
+ ! grep "missing object referenced by" err &&
# Ensure that the one-time-sed script was used.
! test -e "$HTTPD_ROOT_PATH/one-time-sed"
diff --git a/tag.c b/tag.c
index 3d37c1bd2..1110e3643 100644
--- a/tag.c
+++ b/tag.c
@@ -4,6 +4,7 @@
#include "tree.h"
#include "blob.h"
#include "gpg-interface.h"
+#include "packfile.h"
const char *tag_type = "tag";
@@ -64,12 +65,18 @@ int gpg_verify_tag(const struct object_id *oid, const char *name_to_report,
struct object *deref_tag(struct object *o, const char *warn, int warnlen)
{
+ struct object_id *last_oid = NULL;
while (o && o->type == OBJ_TAG)
- if (((struct tag *)o)->tagged)
- o = parse_object(&((struct tag *)o)->tagged->oid);
- else
+ if (((struct tag *)o)->tagged) {
+ last_oid = &((struct tag *)o)->tagged->oid;
+ o = parse_object(last_oid);
+ } else {
+ last_oid = NULL;
o = NULL;
+ }
if (!o && warn) {
+ if (last_oid && is_promisor_object(last_oid))
+ return NULL;
if (!warnlen)
warnlen = strlen(warn);
error("missing object referenced by '%.*s'", warnlen, warn);
--
2.18.0.203.gfac676dfb9-goog
