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From: Stefan Beller <sbeller@google.com>
To: Junio C Hamano <gitster@pobox.com>
Cc: Duy Nguyen <pclouds@gmail.com>, Git Mailing List <git@vger.kernel.org>, Eric Sunshine <sunshine@sunshineco.com>, Jonathan Tan <jonathantanmy@google.com>
Subject: Re: [PATCH 00/26] Moving global state into the repository object (part 1)
Date: Tue, 13 Feb 2018 11:23:04 -0800
Message-ID: <CAGZ79kZOq+_NOOabBUtPJ_zKNb_vdais70F6VzVFoSn5B5A4fQ@mail.gmail.com> (raw)
In-Reply-To: <xmqq7ergra2y.fsf@gitster-ct.c.googlers.com>

On Tue, Feb 13, 2018 at 10:57 AM, Junio C Hamano <gitster@pobox.com> wrote:
> Stefan Beller <sbeller@google.com> writes:
>
>> Oh, that is an interesting perspective. Here is how I arrived at the opposite
>> conclusion initially: Searching for 'ignore_env' shows that we care about it
>> as well for the index and graft paths, which are not the object store, hence
>> it would be better kept in the repository. (The alternative would be to
>> duplicate it into the raw object store, but I do not like data duplication)
>>
>> But maybe it is better to duplicate this one bit instead of passing through
>> a larger scoped object.
>
> If a larger scoped repository refers to a smaller scoped
> object-store, is there still a need to duplicate that bit, instead
> of referring to the bit the smaller scoped one has when asking about
> the bit in the larger scoped one?

No (in theory). But in practice it may be worthwhile:

    "What's the value of this ref?"

    "Oh let me check the ignore_env bit that happens
    to live in the object store first."

would be super confusing to me.

> I am not sure if these "do not look at environment variables" is an
> attribute of these entities---it sounds more like an attribute for
> each invocation of an operation, i.e. "I want to learn where the
> index is but would ignore GIT_INDEX environment for this particular
> query." and "What's the value of this ref?  Please honor the
> common-dir environment during this query".

That sounds like we want to have a configset struct eventually.

For now the ignore_env bit lives in the repository, as that helps
when working with submodules, when reading its comments.
Unfortunately 359efeffc1 (repository: introduce the repository
object, 2017-06-22) did not reason about the existence of the ignore_env
flag in its commit message.

> So from that point of view, it may not matter where the "bit" lives,
> among repository, object-store, or ref-store.

It matters on the scale of confusing the developer?

Stefan

  reply index

Thread overview: 65+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-02-13  1:22 Stefan Beller
2018-02-13  1:22 ` [PATCH 01/26] repository: introduce raw object store field Stefan Beller
2018-02-13  1:22 ` [PATCH 02/26] object-store: move alt_odb_list and alt_odb_tail to object store Stefan Beller
2018-02-13 18:51   ` Brandon Williams
2018-02-13 19:46     ` Stefan Beller
2018-02-13  1:22 ` [PATCH 03/26] object-store: free alt_odb_list Stefan Beller
2018-02-13  1:22 ` [PATCH 04/26] object-store: move packed_git and packed_git_mru to object store Stefan Beller
2018-02-13  1:22 ` [PATCH 05/26] object-store: close all packs upon clearing the " Stefan Beller
2018-02-13  1:22 ` [PATCH 06/26] pack: move prepare_packed_git_run_once to " Stefan Beller
2018-02-13  1:22 ` [PATCH 07/26] pack: move approximate object count " Stefan Beller
2018-02-13  1:22 ` [PATCH 08/26] sha1_file: add raw_object_store argument to alt_odb_usable Stefan Beller
2018-02-13  1:22 ` [PATCH 09/26] sha1_file: add repository argument to link_alt_odb_entry Stefan Beller
2018-02-13  1:22 ` [PATCH 10/26] sha1_file: add repository argument to read_info_alternates Stefan Beller
2018-02-13  1:22 ` [PATCH 11/26] sha1_file: add repository argument to link_alt_odb_entries Stefan Beller
2018-02-13  1:22 ` [PATCH 12/26] sha1_file: add repository argument to prepare_alt_odb Stefan Beller
2018-02-13  1:22 ` [PATCH 13/26] sha1_file: allow link_alt_odb_entries to handle arbitrary repositories Stefan Beller
2018-02-13  1:22 ` [PATCH 14/26] sha1_file: allow prepare_alt_odb " Stefan Beller
2018-02-14  0:37   ` Duy Nguyen
2018-02-14 18:08     ` Brandon Williams
2018-02-13  1:22 ` [PATCH 15/26] sha1_file: add repository argument to sha1_file_name Stefan Beller
2018-02-13  1:22 ` [PATCH 16/26] sha1_file: add repository argument to stat_sha1_file Stefan Beller
2018-02-13  1:22 ` [PATCH 17/26] sha1_file: add repository argument to open_sha1_file Stefan Beller
2018-02-13  1:22 ` [PATCH 18/26] sha1_file: add repository argument to map_sha1_file_1 Stefan Beller
2018-02-13  1:22 ` [PATCH 19/26] sha1_file: add repository argument to map_sha1_file Stefan Beller
2018-02-13  1:22 ` [PATCH 20/26] sha1_file: add repository argument to sha1_loose_object_info Stefan Beller
2018-02-13  1:22 ` [PATCH 21/26] sha1_file: allow sha1_file_name to handle arbitrary repositories Stefan Beller
2018-02-13  1:22 ` [PATCH 22/26] sha1_file: allow stat_sha1_file " Stefan Beller
2018-02-13  1:22 ` [PATCH 23/26] sha1_file: allow open_sha1_file " Stefan Beller
2018-02-13  1:22 ` [PATCH 24/26] sha1_file: allow map_sha1_file_1 " Stefan Beller
2018-02-13  1:22 ` [PATCH 25/26] sha1_file: allow map_sha1_file " Stefan Beller
2018-02-13  1:22 ` [PATCH 26/26] sha1_file: allow sha1_loose_object_info " Stefan Beller
2018-02-13  1:38 ` [PATCH 00/26] Moving global state into the repository object (part 1) Stefan Beller
2018-02-13 11:49 ` Duy Nguyen
2018-02-13 12:13   ` Duy Nguyen
2018-02-13 16:52     ` Brandon Williams
2018-02-13 17:47     ` Stefan Beller
2018-02-13 18:57       ` Junio C Hamano
2018-02-13 19:23         ` Stefan Beller [this message]
2018-02-13 19:35           ` Junio C Hamano
2018-02-13 19:43             ` Stefan Beller
2018-02-14  0:30               ` Junio C Hamano
2018-02-13 19:26 ` Jonathan Nieder
2018-02-14  0:57   ` Duy Nguyen
2018-02-13 19:33 ` Brandon Williams
2018-02-15 20:42 ` Junio C Hamano
2018-02-15 21:09   ` Stefan Beller
2018-02-16 17:46   ` [PATCHv2 00/16] " Stefan Beller
2018-02-16 17:46     ` [PATCH 01/16] repository: introduce raw object store field Stefan Beller
2018-02-16 17:46     ` [PATCH 02/16] object-store: move alt_odb_list and alt_odb_tail to object store Stefan Beller
2018-02-16 17:46     ` [PATCH 03/16] object-store: free alt_odb_list Stefan Beller
2018-02-16 17:46     ` [PATCH 04/16] object-store: move packed_git and packed_git_mru to object store Stefan Beller
2018-02-16 20:27       ` Junio C Hamano
2018-02-16 17:46     ` [PATCH 05/16] object-store: close all packs upon clearing the " Stefan Beller
2018-02-16 17:46     ` [PATCH 06/16] pack: move prepare_packed_git_run_once to " Stefan Beller
2018-02-16 17:46     ` [PATCH 07/16] pack: move approximate object count " Stefan Beller
2018-02-16 17:46     ` [PATCH 08/16] sha1_file: add raw_object_store argument to alt_odb_usable Stefan Beller
2018-02-16 17:46     ` [PATCH 09/16] sha1_file: allow link_alt_odb_entries to handle arbitrary object stores Stefan Beller
2018-02-16 17:46     ` [PATCH 10/16] sha1_file: allow prepare_alt_odb " Stefan Beller
2018-02-16 17:46     ` [PATCH 11/16] sha1_file: allow sha1_file_name " Stefan Beller
2018-02-16 17:46     ` [PATCH 12/16] sha1_file: allow stat_sha1_file " Stefan Beller
2018-02-16 17:46     ` [PATCH 13/16] sha1_file: allow open_sha1_file " Stefan Beller
2018-02-16 17:46     ` [PATCH 14/16] sha1_file: allow map_sha1_file_1 " Stefan Beller
2018-02-16 17:46     ` [PATCH 15/16] sha1_file: allow map_sha1_file " Stefan Beller
2018-02-16 17:46     ` [PATCH 16/16] sha1_file: allow sha1_loose_object_info " Stefan Beller
2018-02-16 22:34     ` [PATCHv2 00/16] Moving global state into the repository object (part 1) Jonathan Nieder

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