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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: Tue, 11 Aug 2020 11:38:06 -0700	[thread overview]
Message-ID: <xmqq5z9pav01.fsf@gitster.c.googlers.com> (raw)
In-Reply-To: <CAFQ2z_NMH75mewQyvN=NnjYR059ut3jfJLH_GPuiMA0ehyzBrQ@mail.gmail.com> (Han-Wen Nienhuys's message of "Tue, 11 Aug 2020 12:49:59 +0200")

Han-Wen Nienhuys <hanwen@google.com> writes:

> On Mon, Aug 10, 2020 at 6:04 PM Junio C Hamano <gitster@pobox.com> wrote:
>>
>> Han-Wen Nienhuys <hanwen@google.com> writes:
>>
>> > Dealing with FETCH_HEAD generically isn't possible unless we extend
>> > the API of the ref backend: the generic ref_store instance doesn't
>> > offer a way to get at the path that corresponds to FETCH_HEAD, so we
>> > can't handle it in refs_read_raw_ref(). In the current reftable
>> > series, FETCH_HEAD is dealt with in the backends separately.
>>
>> I am not sure what the best way would be, but I do not think any
>> existing code writes into it using the refs API at all, even though
>> it may be read only for the first object name using the refs API.
>>
>> And I am not sure if we want to extend the write side API so that
>> the callers can express the full flexibility of that single file.
>
> That's not what I am getting at. I am just interested in how to handle
> FETCH_HEAD in refs_read_raw_ref.
>
>> So perhaps the best way forward would be to ensure that anybody who
>> tries to read from FETCH_HEAD using the ref API reads the first
>> object name in it from $GIT_DIR/FETCH_HEAD file as we've always done
>> since the beginning of time, regardless of what ref backend is used,
>
> Right, but how do we get at the value of $GIT_DIR given a struct
> ref_store? We can either push that out to the ref store backend,
> because each backend knows what $GIT_DIR is, or we can make $GIT_DIR a
> property of the generic ref_store.
>
> I suppose it's cleaner to make the latter API extension.

Yup.  Sounds like the right direction to go.

Thanks.

  reply	other threads:[~2020-08-11 18:38 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-06 17:29 [PATCH 0/2] " 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
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 [this message]
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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