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From: Stefan Beller <sbeller@google.com>
To: Michael Haggerty <mhagger@alum.mit.edu>
Cc: git <git@vger.kernel.org>,
	Jonathan Tan <jonathantanmy@google.com>,
	sunshine@sunshineco.us, Duy Nguyen <pclouds@gmail.com>,
	René Scharfe <l.s.r@web.de>,
	"brian m. carlson" <sandals@crustytoothpaste.net>
Subject: Re: [PATCH 12/16] refs: store the main ref store inside the repository struct
Date: Tue, 10 Apr 2018 11:38:02 -0700
Message-ID: <CAGZ79kZEOzAOqYePMxHMZChuoO3ryy8xY41KCPTp=HT-3TRVPw@mail.gmail.com> (raw)
In-Reply-To: <2c6214de-36b0-c67b-9a40-d43d28e780c4@alum.mit.edu>

Hi Michael,

On Tue, Apr 10, 2018 at 7:02 AM, Michael Haggerty <mhagger@alum.mit.edu> wrote:

> This also makes sense to me, as far as it goes. I have a few comments
> and questions:
>
> Why do you call the new member `main_ref_store`? Is there expected to be
> some other `ref_store` associated with a repository?

I'll rename it in a reroll.

>
> I think the origin of the name `main_ref_store` was to distinguish it
> from submodule ref stores. But presumably those will soon become the
> "main" ref stores for their respective submodule repository objects,
> right?

I hope so.

> So maybe calling things `repository.ref_store` and
> `get_ref_store(repository)` would be appropriate.

ok.

>
> There are some places in the reference code that only work with the main
> repository. The ones that I can think of are:
>
> * `ref_resolves_to_object()` depends on an object store.
>
> * `peel_object()` and `ref_iterator_peel()` also have to look up objects
> (in this case, tag objects).
>
> * Anything that calls `files_assert_main_repository()` or depends on
> `REF_STORE_MAIN` isn't implemented for other reference stores (usually,
> I think, these are functions that depend on the object store).
>
> Some of these things might be easy to generalize to non-main
> repositories, but I didn't bother because AFAIK currently only the main
> repository store is ever mutated.
>
> You can move a now-obsolete comment above the definition of `struct
> files_ref_store` if you haven't in some other patch (search for
> "libification").

ok, I'll have a look at that.

My plan was to remove the submodule accessors from the refs API, and
mandate the access via

    repo_submodule_init(&submodule_repo, superproject_repo, path);
    sub_ref_store = get_ref_store(submodule_repo);

instead of also having

    sub_ref_store = get_submodule_ref_store(path);

as that would ease the refs API (and its internals potentially)
as well as avoiding errors with mixing up repositories. As the
construction of a submodule repository struct requires its
superproject repo, it helps avoiding pitfalls with nested
submodules IMO.

Thanks for the comments,
Stefan

>
> Hope that helps,
> Michael

  reply index

Thread overview: 91+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-06 23:21 [RFC PATCH 00/19] object-store refactoring 3 (replace objects, main ref store) Stefan Beller
2018-04-06 23:21 ` [PATCH 01/19] replace_object.c: rename to use dash in file name Stefan Beller
2018-04-06 23:21 ` [PATCH 02/19] replace-object: move replace_object to object store Stefan Beller
2018-04-09 13:51   ` Derrick Stolee
2018-04-06 23:21 ` [PATCH 03/19] object-store: move lookup_replace_object to replace-object.h Stefan Beller
2018-04-06 23:21 ` [PATCH 04/19] replace-object: move replace objects prepared flag to object store Stefan Beller
2018-04-06 23:21 ` [PATCH 05/19] replace-object: check_replace_refs is safe in multi repo environment Stefan Beller
2018-04-06 23:21 ` [PATCH 06/19] refs: add repository argument to get_main_ref_store Stefan Beller
2018-04-07  6:53   ` Eric Sunshine
2018-04-09 18:51     ` Stefan Beller
2018-04-06 23:21 ` [PATCH 07/19] refs: add repository argument to for_each_replace_ref Stefan Beller
2018-04-06 23:21 ` [PATCH 08/19] replace-object: add repository argument to replace_object_pos Stefan Beller
2018-04-06 23:21 ` [PATCH 09/19] replace-object: add repository argument to register_replace_object Stefan Beller
2018-04-06 23:21 ` [PATCH 10/19] replace-object: add repository argument to prepare_replace_object Stefan Beller
2018-04-06 23:21 ` [PATCH 11/19] replace-object: add repository argument to do_lookup_replace_object Stefan Beller
2018-04-06 23:21 ` [PATCH 12/19] replace-object: add repository argument to lookup_replace_object Stefan Beller
2018-04-06 23:21 ` [PATCH 13/19] refs: store the main ref store inside the repository struct Stefan Beller
2018-04-07  6:54   ` Eric Sunshine
2018-04-06 23:21 ` [PATCH 14/19] refs: allow for_each_replace_ref to handle arbitrary repositories Stefan Beller
2018-04-06 23:21 ` [PATCH 15/19] replace-object: allow replace_object_pos " Stefan Beller
2018-04-06 23:21 ` [PATCH 16/19] replace-object: allow register_replace_object " Stefan Beller
2018-04-06 23:21 ` [PATCH 17/19] replace-object: allow prepare_replace_object " Stefan Beller
2018-04-06 23:21 ` [PATCH 18/19] replace-object: allow do_lookup_replace_object " Stefan Beller
2018-04-06 23:21 ` [PATCH 19/19] replace-object: allow lookup_replace_object " Stefan Beller
2018-04-07  4:58 ` [RFC PATCH 00/19] object-store refactoring 3 (replace objects, main ref store) René Scharfe
2018-04-09 17:44   ` Stefan Beller
2018-04-07  9:50 ` Duy Nguyen
2018-04-09 17:39   ` Stefan Beller
2018-04-09 13:58 ` Derrick Stolee
     [not found] ` <nycvar.QRO.7.76.6.1804091038430.55@ZVAVAG-6OXH6DA.rhebcr.pbec.zvpebfbsg.pbz>
2018-04-09 17:36   ` Stefan Beller
2018-04-09 22:45 ` [PATCHv2 00/16] " Stefan Beller
2018-04-09 22:45   ` [PATCH 01/16] replace_object: use oidmap Stefan Beller
2018-04-10  2:57     ` Junio C Hamano
2018-04-09 22:45   ` [PATCH 02/16] replace_object.c: rename to use dash in file name Stefan Beller
2018-04-10  3:00     ` Junio C Hamano
2018-04-10 17:57       ` Stefan Beller
2018-04-10 21:26       ` [PATCH 0/6] Rename files to use dashes instead of underscores Stefan Beller
2018-04-10 21:26         ` [PATCH 1/6] write_or_die.c: rename to use dashes in file name Stefan Beller
2018-04-10 21:26         ` [PATCH 2/6] unicode_width.h: rename to use dash " Stefan Beller
2018-04-10 21:26         ` [PATCH 3/6] exec_cmd: " Stefan Beller
2018-04-10 21:26         ` [PATCH 4/6] sha1_name.c: " Stefan Beller
2018-04-10 21:26         ` [PATCH 5/6] sha1_file.c: " Stefan Beller
2018-04-10 21:26         ` [PATCH 6/6] replace_object.c: " Stefan Beller
2018-04-10 21:28         ` [PATCH 0/6] Rename files to use dashes instead of underscores Stefan Beller
2018-04-10 22:39         ` Johannes Schindelin
2018-04-10 22:47           ` Stefan Beller
2018-04-11 23:13         ` brian m. carlson
2018-04-09 22:45   ` [PATCH 03/16] replace-object: move replace_map to object store Stefan Beller
2018-04-10  3:10     ` Junio C Hamano
2018-04-09 22:45   ` [PATCH 04/16] object-store: move lookup_replace_object to replace-object.h Stefan Beller
2018-04-09 22:45   ` [PATCH 05/16] replace-object: eliminate replace objects prepared flag Stefan Beller
2018-04-10  3:21     ` Junio C Hamano
2018-04-10  7:32     ` René Scharfe
2018-04-09 22:45   ` [PATCH 06/16] replace-object: check_replace_refs is safe in multi repo environment Stefan Beller
2018-04-10  3:37     ` Junio C Hamano
2018-04-09 22:45   ` [PATCH 07/16] refs: add repository argument to get_main_ref_store Stefan Beller
2018-04-10 13:36     ` Michael Haggerty
2018-04-10 18:27       ` Stefan Beller
2018-04-09 22:45   ` [PATCH 08/16] refs: add repository argument to for_each_replace_ref Stefan Beller
2018-04-09 22:45   ` [PATCH 09/16] replace-object: add repository argument to prepare_replace_object Stefan Beller
2018-04-09 22:45   ` [PATCH 10/16] replace-object: add repository argument to do_lookup_replace_object Stefan Beller
2018-04-09 22:45   ` [PATCH 11/16] replace-object: add repository argument to lookup_replace_object Stefan Beller
2018-04-09 22:45   ` [PATCH 12/16] refs: store the main ref store inside the repository struct Stefan Beller
2018-04-09 23:24     ` Brandon Williams
2018-04-09 23:29       ` Stefan Beller
2018-04-09 23:35         ` Brandon Williams
2018-04-10 14:02     ` Michael Haggerty
2018-04-10 18:38       ` Stefan Beller [this message]
2018-04-09 22:45   ` [PATCH 13/16] refs: allow for_each_replace_ref to handle arbitrary repositories Stefan Beller
2018-04-09 22:45   ` [PATCH 14/16] replace-object: allow prepare_replace_object " Stefan Beller
2018-04-09 22:45   ` [PATCH 15/16] replace-object: allow do_lookup_replace_object " Stefan Beller
2018-04-09 22:45   ` [PATCH 16/16] replace-object: allow lookup_replace_object " Stefan Beller
2018-04-09 23:25   ` [PATCHv2 00/16] object-store refactoring 3 (replace objects, main ref store) Brandon Williams
2018-04-09 23:31     ` Stefan Beller
2018-04-12  0:21   ` [PATCHv3 00/15] replace_object.c: rename to use dash in file name Stefan Beller
2018-04-12  0:21     ` [PATCH 01/15] replace_object: use oidmap Stefan Beller
2018-04-12  0:21     ` [PATCH 02/15] replace-object: move replace_map to object store Stefan Beller
2018-04-12  0:21     ` [PATCH 03/15] object-store: move lookup_replace_object to replace-object.h Stefan Beller
2018-04-12  0:21     ` [PATCH 04/15] replace-object: eliminate replace objects prepared flag Stefan Beller
2018-04-12  0:21     ` [PATCH 05/15] replace-object: check_replace_refs is safe in multi repo environment Stefan Beller
2018-04-12  0:21     ` [PATCH 06/15] refs: add repository argument to get_main_ref_store Stefan Beller
2018-04-12  0:21     ` [PATCH 07/15] refs: add repository argument to for_each_replace_ref Stefan Beller
2018-04-12  0:21     ` [PATCH 08/15] replace-object: add repository argument to prepare_replace_object Stefan Beller
2018-04-12  0:21     ` [PATCH 09/15] replace-object: add repository argument to do_lookup_replace_object Stefan Beller
2018-04-12  0:21     ` [PATCH 10/15] replace-object: add repository argument to lookup_replace_object Stefan Beller
2018-04-12  0:21     ` [PATCH 11/15] refs: store the main ref store inside the repository struct Stefan Beller
2018-04-12  0:21     ` [PATCH 12/15] refs: allow for_each_replace_ref to handle arbitrary repositories Stefan Beller
2018-04-12  0:21     ` [PATCH 13/15] replace-object: allow prepare_replace_object " Stefan Beller
2018-04-12  0:21     ` [PATCH 14/15] replace-object: allow do_lookup_replace_object " Stefan Beller
2018-04-12  0:21     ` [PATCH 15/15] replace-object: allow lookup_replace_object " Stefan Beller
2018-04-12 11:43     ` [PATCHv3 00/15] replace_object.c: rename to use dash in file name Derrick Stolee

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