From: Junio C Hamano <gitster@pobox.com>
To: Han-Wen Nienhuys <hanwen@google.com>
Cc: Han-Wen Nienhuys via GitGitGadget <gitgitgadget@gmail.com>,
git <git@vger.kernel.org>, Han-Wen Nienhuys <hanwenn@gmail.com>
Subject: Re: [PATCH v3 0/3] Remove special casing for PSEUDOREF updates
Date: Wed, 05 Aug 2020 08:54:01 -0700 [thread overview]
Message-ID: <xmqqk0ydozqe.fsf@gitster.c.googlers.com> (raw)
In-Reply-To: <CAFQ2z_NU4=WcUDvVY9PNs+p-WU4u5=QY+=DHonGyK29numhWoQ@mail.gmail.com> (Han-Wen Nienhuys's message of "Wed, 5 Aug 2020 12:48:21 +0200")
Han-Wen Nienhuys <hanwen@google.com> writes:
>> All of which means FETCH_HEAD is special and we may not want to
>> burden the special casing of it to newer backends.
>
> Can you confirm that FETCH_HEAD is the only thing that can store more
> than just a symref / SHA1 ? Based on the name, and a comment in the
> JGit source, I thought that MERGE_HEAD might contain more than one
> SHA1 at a time.
No I cannot. I do not think MERGE_HEAD is something I added with as
deep a thought as I did with FETCH_HEAD. If it mimics FETCH_HEAD,
then perhaps it does, but I somehow doubt it.
As can be seen in builtin/merge.c::collect_parents(), we do special
case FETCH_HEAD when grabbing what commit*S* to merge, but all
others are read with get_merge_parent() that makes a single call to
get_oid(), i.e. anything other than FETCH_HEAD cannot have more than
one object recorded.
next prev parent reply other threads:[~2020-08-05 20:07 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-06 17:29 [PATCH 0/2] Remove special casing for PSEUDOREF updates Han-Wen Nienhuys via GitGitGadget
2020-07-06 17:29 ` [PATCH 1/2] Modify pseudo refs through ref backend storage Han-Wen Nienhuys via GitGitGadget
2020-07-06 20:26 ` Junio C Hamano
2020-07-07 13:56 ` Han-Wen Nienhuys
2020-07-07 15:20 ` Junio C Hamano
2020-07-07 17:15 ` Han-Wen Nienhuys
2020-07-07 18:14 ` Junio C Hamano
2020-07-06 17:29 ` [PATCH 2/2] Make HEAD a PSEUDOREF rather than PER_WORKTREE Han-Wen Nienhuys via GitGitGadget
2020-07-06 20:30 ` Junio C Hamano
2020-07-07 9:24 ` Han-Wen Nienhuys
2020-07-09 21:11 ` [PATCH v2 0/3] Remove special casing for PSEUDOREF updates Han-Wen Nienhuys via GitGitGadget
2020-07-09 21:11 ` [PATCH v2 1/3] t1400: use git rev-parse for testing PSEUDOREF existence Han-Wen Nienhuys via GitGitGadget
2020-07-09 21:11 ` [PATCH v2 2/3] Modify pseudo refs through ref backend storage Han-Wen Nienhuys via GitGitGadget
2020-07-09 21:11 ` [PATCH v2 3/3] Make HEAD a PSEUDOREF rather than PER_WORKTREE Han-Wen Nienhuys via GitGitGadget
2020-07-10 19:25 ` [PATCH v2 0/3] Remove special casing for PSEUDOREF updates Junio C Hamano
2020-07-16 18:45 ` [PATCH v3 " Han-Wen Nienhuys via GitGitGadget
2020-07-16 18:45 ` [PATCH v3 1/3] t1400: use git rev-parse for testing PSEUDOREF existence Han-Wen Nienhuys via GitGitGadget
2020-07-16 18:45 ` [PATCH v3 2/3] Modify pseudo refs through ref backend storage Han-Wen Nienhuys via GitGitGadget
2020-07-17 8:52 ` Johannes Schindelin
2020-07-27 15:41 ` Han-Wen Nienhuys
2020-07-16 18:45 ` [PATCH v3 3/3] Make HEAD a PSEUDOREF rather than PER_WORKTREE Han-Wen Nienhuys via GitGitGadget
2020-07-16 22:09 ` [PATCH v3 0/3] Remove special casing for PSEUDOREF updates Junio C Hamano
2020-07-27 8:50 ` Han-Wen Nienhuys
2020-07-27 16:20 ` Junio C Hamano
2020-08-03 19:07 ` Han-Wen Nienhuys
2020-08-03 20:07 ` Junio C Hamano
2020-08-05 1:45 ` Junio C Hamano
2020-08-05 10:48 ` Han-Wen Nienhuys
2020-08-05 15:54 ` Junio C Hamano [this message]
2020-08-10 14:27 ` Han-Wen Nienhuys
2020-08-10 16:04 ` Junio C Hamano
2020-08-11 10:49 ` Han-Wen Nienhuys
2020-08-11 18:38 ` Junio C Hamano
2020-08-19 13:19 ` Han-Wen Nienhuys
2020-08-19 15:52 ` Junio C Hamano
2020-07-27 16:25 ` [PATCH v4 " Han-Wen Nienhuys via GitGitGadget
2020-07-27 16:25 ` [PATCH v4 1/3] t1400: use git rev-parse for testing PSEUDOREF existence Han-Wen Nienhuys via GitGitGadget
2020-07-27 16:25 ` [PATCH v4 2/3] Modify pseudo refs through ref backend storage Han-Wen Nienhuys via GitGitGadget
2020-07-27 16:25 ` [PATCH v4 3/3] Make HEAD a PSEUDOREF rather than PER_WORKTREE Han-Wen Nienhuys via GitGitGadget
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