From: Jeff King <peff@peff.net>
To: Bryan Turner <bturner@atlassian.com>
Cc: Robert Dailey <rcdailey.lists@gmail.com>, Git <git@vger.kernel.org>
Subject: Re: Strange annotated tag issue
Date: Thu, 21 Mar 2019 15:39:12 -0400 [thread overview]
Message-ID: <20190321193912.GB19427@sigill.intra.peff.net> (raw)
In-Reply-To: <CAGyf7-F4vvzwVsdgtiog+xvwgHgYkNMKQ59bCxrZYtdn+eGAPw@mail.gmail.com>
On Thu, Mar 21, 2019 at 12:04:22PM -0700, Bryan Turner wrote:
> > Why does it show two entries? In my `packed-refs` file, it also shows
> > a strange revision for the tag (I expect to see just 1 SHA1). Not sure
> > if it is related:
> >
> > ```
> > 66c41d67da887025c4e22e9891f5cd261f82eb31 refs/tags/4.2.0.1900
> > ^2fcfd00ef84572fb88852be55315914f37e91e11
> > ```
>
> This part, though, is normal for "packed-refs". The first line shows
> the annotated tag object's hash ("66c41d67da8") and the tagged
> object's hash ("2fcfd00ef8"). You can see that "2fcfd00ef8" matches
> the tagged commit output by "git show". The leading "^" on the second
> line is how Git knows the line identifies a peeled tag's target rather
> than the start of a new ref. If your "packed-refs" starts with
> "peeled" (and maybe "fully-peeled") then every annotated (or signed)
> tag in the file should have a second line prefixed by "^".
Nicely explained.
I think there's one other interesting bit of trivia, since we seem to be
dealing with a tag-of-a-tag here. We store only a single peeled value
for each ref, whatever is at the bottom (which is always a non-tag). So
in this case of a tag that points to a tag that points to a commit, the
peeled value is the commit, and the tag in the middle isn't mentioned.
Likewise for upload-pack output, which mentions the peeled objects (so
that clients can auto-fetch tags). It only gives the full peeling.
In theory we could store and advertise the intermediate objects, but I
don't think anybody has ever cared enough about this case to explore
that (and this is mostly an optimization; it should all work correctly,
and I recall fixing some bugs over the years).
-Peff
next prev parent reply other threads:[~2019-03-21 19:39 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-21 16:59 Strange annotated tag issue Robert Dailey
2019-03-21 19:04 ` Bryan Turner
2019-03-21 19:39 ` Jeff King [this message]
2019-03-21 19:29 ` Jeff King
2019-03-25 13:50 ` Robert Dailey
2019-03-25 14:49 ` Jeff King
2019-03-25 15:31 ` Robert Dailey
2019-03-25 18:43 ` Bryan Turner
2019-03-25 23:36 ` Jeff King
2019-03-25 19:19 ` Ævar Arnfjörð Bjarmason
2019-03-25 23:37 ` Jeff King
2019-03-26 7:53 ` [PATCH 0/3] tag: prevent recursive tags Denton Liu
2019-03-26 7:53 ` [PATCH 1/3] " Denton Liu
2019-03-26 8:51 ` Denton Liu
2019-03-26 10:10 ` Ævar Arnfjörð Bjarmason
2019-03-27 4:57 ` Elijah Newren
2019-03-27 10:27 ` Ævar Arnfjörð Bjarmason
2019-03-28 19:02 ` Robert Dailey
2019-03-26 7:53 ` [PATCH 2/3] t7004: ensure recursive tag behavior is working Denton Liu
2019-03-26 10:11 ` Ævar Arnfjörð Bjarmason
2019-03-26 7:53 ` [PATCH 3/3] git-tag.txt: document --allow-recursive-tag option Denton Liu
2019-03-26 10:16 ` Ævar Arnfjörð Bjarmason
2019-03-26 16:18 ` [PATCH 0/3] tag: prevent recursive tags Jeff King
2019-04-02 5:38 ` [PATCH v2 0/2] tag: prevent nested tags Denton Liu
2019-04-02 5:38 ` [PATCH v2 1/2] tag: fix formatting Denton Liu
2019-04-02 5:38 ` [PATCH v2 2/2] tag: prevent nested tags Denton Liu
2019-04-02 23:03 ` [PATCH v2.5 " Denton Liu
2019-04-03 7:32 ` Junio C Hamano
2019-04-03 8:49 ` Junio C Hamano
2019-04-03 18:26 ` Robert Dailey
2019-04-04 9:32 ` Junio C Hamano
2019-04-04 13:47 ` Robert Dailey
2019-04-04 21:50 ` Junio C Hamano
2019-04-05 2:51 ` Robert Dailey
2019-04-03 18:16 ` Johannes Sixt
2019-04-03 21:33 ` Denton Liu
2019-04-04 2:02 ` Jeff King
2019-04-04 9:31 ` Junio C Hamano
2019-04-04 12:27 ` Jeff King
2019-04-04 21:54 ` Junio C Hamano
2019-04-04 22:12 ` Jeff King
2019-04-11 18:40 ` Eckhard Maaß
2019-04-12 3:21 ` Junio C Hamano
2019-04-05 0:36 ` Elijah Newren
2019-04-05 5:29 ` Junio C Hamano
2019-04-04 18:25 ` [PATCH v3 0/2] tag: advise on recursive tagging Denton Liu
2019-04-04 18:25 ` [PATCH v3 1/2] tag: fix formatting Denton Liu
2019-04-04 18:25 ` [PATCH v3 2/2] tag: advise on nested tags Denton Liu
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