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From: "Đoàn Trần Công Danh" <congdanhqx@gmail.com>
To: git@vger.kernel.org
Cc: "Đoàn Trần Công Danh" <congdanhqx@gmail.com>,
	"Junio C Hamano" <gitster@pobox.com>, "Jeff King" <peff@peff.net>
Subject: [PATCH v3 0/2] diff: index-line: respect --abbrev in object's name
Date: Fri, 14 Aug 2020 07:23:08 +0700	[thread overview]
Message-ID: <cover.1597364493.git.congdanhqx@gmail.com> (raw)
In-Reply-To: <cover.1596887883.git.congdanhqx@gmail.com>

For diff-family, Git supports 2 different options for 2 different
purposes, `--full-index' for showing diff-patch object's name in full,
and `--abbrev' to customize the length of object names in diff-raw and
diff-tree header lines, without any options to customise the length of
object names in diff-patch format. When working with diff-patch format,
we only have two options, either full index, or default abbrev length.

Although, that consistent is documented, it doesn't stop users from
trying to use `--abbrev' with the hope of customising diff-patch's
objects' name's abbreviation.

Let's resolve that inconsistency.

Đoàn Trần Công Danh (2):
  revision: differentiate if --no-abbrev asked explicitly
  diff: index-line: respect --abbrev in object's name

 Documentation/diff-options.txt                |  9 +++---
 diff.c                                        |  5 +++-
 revision.c                                    |  2 +-
 t/t4013-diff-various.sh                       |  3 ++
 ...ff.diff-tree_--root_-p_--abbrev=10_initial | 29 +++++++++++++++++++
 ...--root_-p_--full-index_--abbrev=10_initial | 29 +++++++++++++++++++
 ...f.diff-tree_--root_-p_--full-index_initial | 29 +++++++++++++++++++
 7 files changed, 100 insertions(+), 6 deletions(-)
 create mode 100644 t/t4013/diff.diff-tree_--root_-p_--abbrev=10_initial
 create mode 100644 t/t4013/diff.diff-tree_--root_-p_--full-index_--abbrev=10_initial
 create mode 100644 t/t4013/diff.diff-tree_--root_-p_--full-index_initial

Range-diff against v2:
1:  9daef7445c ! 1:  9a26c5b611 revision: differentiate if --no-abbrev asked explicitly
    @@ Metadata
      ## Commit message ##
         revision: differentiate if --no-abbrev asked explicitly
     
    -    When we see `--no-abbrev' in command's arguments, we reset `abbrev' of
    -    `diff_options` to 0, thus, on a later stage, the object id won't
    -    be shortened (by not set object_id[abbrev] to '\0').
    +    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.
     
         While not doing anything is very effective way to show full object id,
         we couldn't differentiate if --no-abbrev or not.
     
    -    In a later change, we want to extend --abbrev support to diff-patch
    -    format.
    +    We can differentiate those above scenarios by either:
    +    * Add a new field in diff-options to mark if --no-abbrev was asked.
    +      With this option, we have a new field for a single purpose, and one
    +      more thing to worry about.
    +    * Treat --no-abbrev as same as --full-index. This option is problematic,
    +      since we want to allow --abbrev overwrite --no-abbrev again.
    +      On the other hand, we also need to keep our promises with scripter
    +      who uses --full-index to ask for full object names in index line,
    +      so, we need to respsect --full-index regardless of --abbrev.
    +    * Set 'abbrev' field in diff-options to the length of the hash we are
    +      using. With this option, we can differentiate if --no-abbrev was asked
    +      ('abbrev' is hash's length) or none of --[no-]abbrev was asked
    +      ('abbrev' is '0'), script with --full-index still works and our
    +      headache is kept as is.
     
    -    Let's ask for full object id if we see --no-abbrev instead.
    +    Let's ask for full object id if we see --no-abbrev.
     
         Signed-off-by: Đoàn Trần Công Danh <congdanhqx@gmail.com>
     
2:  12acf1fe5d = 2:  760df7782d diff: index-line: respect --abbrev in object's name
-- 
2.28.0.215.g32ffa52ee0


  parent reply	other threads:[~2020-08-14  0:23 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 ` Đoàn Trần Công Danh [this message]
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
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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