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From: Junio C Hamano <gitster@pobox.com>
To: "Đoàn Trần Công Danh" <congdanhqx@gmail.com>
Cc: git@vger.kernel.org, Jeff King <peff@peff.net>
Subject: Re: [PATCH v3 1/2] revision: differentiate if --no-abbrev asked explicitly
Date: Thu, 13 Aug 2020 17:50:31 -0700	[thread overview]
Message-ID: <xmqq8sei125k.fsf@gitster.c.googlers.com> (raw)
In-Reply-To: <9a26c5b6110081cd8d029f2ab0327c4a1d228ef7.1597364493.git.congdanhqx@gmail.com> (=?utf-8?B?IsSQb8OgbiBUcuG6p24gQ8O0bmc=?= Danh"'s message of "Fri, 14 Aug 2020 07:23:09 +0700")

Đoàn Trần Công Danh  <congdanhqx@gmail.com> writes:

> When we see --no-abbrev in command's arguments, we reset the 'abbrev'
> field in diff-options to 0 and this value will be looked at
> diff_abbrev_oid() to decide not to truncate the object name.
>
> In a later change, we want to extend --abbrev support to diff-patch
> format. When --abbrev supporting diff-patch, we need to differentiate
> those below scenarios:
>
> * None of those options --abbrev, --no-abbrev, and --full-index are
>   asked. diff-patch should keep old behavior of using DEFAULT_ABBREV
>   for the index length.
> * --no-abbrev is asked, diff-patch should treat this option as same as
>   --full-index and show full object name in index line.

Sorry, but are you saying that the above two cases cannot be
differentiated in the current code?

 * If none of --abbrev, --no-abbrev, --full-index are given, then
   diff.c::prep_parse_options() will leave options->flags.full_index
   and options->abbrev untouched.  They are initialized to false and
   DEFAULT_ABBREV (typically -1 when unconfigured).

 * If --no-abbrev is given, options->abbrev is set to 0.
   options->flags.full_index is not touched.

So you should be able to tell these two apart by only looking at
options->flags.full_index bit.  Perhaps, even though you said "we
need to differentiate", you meant something else?

> While not doing anything is very effective way to show full object id,
> we couldn't differentiate if --no-abbrev or not.

Hmph.  --no-abbrev without --full-index would not set
flags.full_index bit; using --full-index would set the bit.  Are you
planning to do something special when BOTH --no-abbrev and --full-index
is given?  I am confused X-<.


  reply	other threads:[~2020-08-14  0:50 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-09  2:19 [RFC PATCH 0/2] extend --abbrev support to diff-patch format Đoàn Trần Công Danh
2020-08-09  2:19 ` [RFC PATCH 1/2] revision: differentiate if --no-abbrev asked explicitly Đoàn Trần Công Danh
2020-08-09  2:19 ` [RFC PATCH 2/2] diff: extend --abbrev support to diff-patch format Đoàn Trần Công Danh
2020-08-09 19:01 ` [RFC PATCH 0/2] " Junio C Hamano
2020-08-10 10:00   ` Jeff King
2020-08-10 12:31     ` Đoàn Trần Công Danh
2020-08-10 15:15       ` Junio C Hamano
2020-08-10 15:27         ` Jeff King
2020-08-11  0:33           ` Đoàn Trần Công Danh
2020-08-11  5:22             ` Jeff King
2020-08-11 12:07               ` Đoàn Trần Công Danh
2020-08-10 15:06     ` Junio C Hamano
2020-08-11 11:49 ` [PATCH v2 0/2] diff: index-line: respect --abbrev in object's name Đoàn Trần Công Danh
2020-08-11 11:49   ` [PATCH v2 1/2] revision: differentiate if --no-abbrev asked explicitly Đoàn Trần Công Danh
2020-08-11 18:54     ` Junio C Hamano
2020-08-11 11:49   ` [PATCH v2 2/2] diff: index-line: respect --abbrev in object's name Đoàn Trần Công Danh
2020-08-14  0:23 ` [PATCH v3 0/2] " Đoàn Trần Công Danh
2020-08-14  0:23   ` [PATCH v3 1/2] revision: differentiate if --no-abbrev asked explicitly Đoàn Trần Công Danh
2020-08-14  0:50     ` Junio C Hamano [this message]
2020-08-14  0:59       ` Đoàn Trần Công Danh
2020-08-14  1:06         ` Junio C Hamano
2020-08-14 14:50           ` Đoàn Trần Công Danh
2020-08-19 22:50             ` Junio C Hamano
2020-08-14  0:23   ` [PATCH v3 2/2] diff: index-line: respect --abbrev in object's name Đoàn Trần Công Danh
2020-08-14 15:18     ` SZEDER Gábor
2020-08-14 17:00       ` Junio C Hamano
2020-08-14 18:59         ` Junio C Hamano
2020-08-15  0:21           ` brian m. carlson
2020-08-15  2:27             ` Đoàn Trần Công Danh
2020-08-17 16:17               ` Junio C Hamano
2020-08-20  4:56               ` Junio C Hamano
2020-08-20 12:35 ` [PATCH v4 0/2] " Đoàn Trần Công Danh
2020-08-20 12:35   ` [PATCH v4 1/2] t4013: improve diff-post-processor logic Đoàn Trần Công Danh
2020-08-20 19:49     ` Junio C Hamano
2020-08-21 12:05       ` Đoàn Trần Công Danh
2020-08-21 15:44         ` Junio C Hamano
2020-08-20 12:35   ` [PATCH v4 2/2] diff: index-line: respect --abbrev in object's name Đoàn Trần Công Danh
2020-08-20 19:58     ` Junio C Hamano
2020-08-21 11:51 ` [PATCH v5 0/2] " Đoàn Trần Công Danh
2020-08-21 11:51   ` [PATCH v5 1/2] t4013: improve diff-post-processor logic Đoàn Trần Công Danh
2020-08-21 11:51   ` [PATCH v5 2/2] diff: index-line: respect --abbrev in object's name Đoàn Trần Công Danh

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