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From: Junio C Hamano <gitster@pobox.com>
To: Denton Liu <liu.denton@gmail.com>
Cc: Git Mailing List <git@vger.kernel.org>
Subject: Re: [PATCH v2 3/4] builtin/diff: parse --no-index using parse_options()
Date: Thu, 10 Sep 2020 11:35:42 -0700	[thread overview]
Message-ID: <xmqqo8mdpji9.fsf@gitster.c.googlers.com> (raw)
In-Reply-To: <ea6717e7b3a8b89fc3750505678321803cde78dc.1599723087.git.liu.denton@gmail.com>

Denton Liu <liu.denton@gmail.com> writes:

> Instead of parsing the `--no-index` option with a plain strcmp, use
> parse_options() to parse options. This allows us to easily add more
> options in a future commit.
>
> As a result of this change, `--no-index` is removed from `argv` so, as a
> result, we no longer need to handle it in diff_no_index().
>
> Signed-off-by: Denton Liu <liu.denton@gmail.com>
> ---
>  builtin/diff.c  | 33 ++++++++++++++++++++++-----------
>  diff-no-index.c | 15 +++------------
>  2 files changed, 25 insertions(+), 23 deletions(-)
>
> diff --git a/builtin/diff.c b/builtin/diff.c
> index cb98811c21..0e086ed7c4 100644
> --- a/builtin/diff.c
> +++ b/builtin/diff.c
> @@ -373,6 +373,13 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
>  	int nongit = 0, no_index = 0;
>  	int result = 0;
>  	struct symdiff sdiff;
> +	struct option options[] = {
> +		OPT_SET_INT_F(0, "no-index", &no_index,
> +			   N_("compare the given paths on the filesystem"),
> +			   DIFF_NO_INDEX_EXPLICIT,
> +			   PARSE_OPT_NONEG),
> +		OPT_END(),
> +	};

What's the reasoning behind teaching the "--merge-base" option only
to "diff" and not allowing "diff-index" and "diff-tree" to also
benefit from the new support?  It should be taught to be handled by
diff.c::diff_opt_parse() instead, like all other "diff" options.  I
simply do not see what makes "--merge-base" so special compared to
other options like "-R", "--color-words", etc.

And with that, this step will become totally unnecessary, because
the options[] array will still have only the "no-index" option and
nothing else.

UNLESS we are planning to use this array to parse all diff options
here, whether it is for the no-index mode or the normal invocation
of diff, but that is unlikely to happen---we'd still share many
options between the plumbing "diff-*" family and Porcelain "diff"
commands.

Thanks.

  reply	other threads:[~2020-09-10 18:36 UTC|newest]

Thread overview: 58+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-05 19:08 [PATCH 0/4] builtin/diff: learn --merge-base Denton Liu
2020-09-05 19:08 ` [PATCH 1/4] t4068: remove unnecessary >tmp Denton Liu
2020-09-05 19:08 ` [PATCH 2/4] git-diff.txt: backtick quote command text Denton Liu
2020-09-05 19:08 ` [PATCH 3/4] builtin/diff: parse --no-index using parse_options() Denton Liu
2020-09-05 19:08 ` [PATCH 4/4] builtin/diff: learn --merge-base Denton Liu
2020-09-06 21:58   ` Junio C Hamano
2020-09-10  7:32 ` [PATCH v2 0/4] " Denton Liu
2020-09-10  7:32   ` [PATCH v2 1/4] t4068: remove unnecessary >tmp Denton Liu
2020-09-10  7:32   ` [PATCH v2 2/4] git-diff.txt: backtick quote command text Denton Liu
2020-09-10  7:32   ` [PATCH v2 3/4] builtin/diff: parse --no-index using parse_options() Denton Liu
2020-09-10 18:35     ` Junio C Hamano [this message]
2020-09-13  8:31       ` Denton Liu
2020-09-13 21:45         ` Junio C Hamano
2020-09-10  7:32   ` [PATCH v2 4/4] builtin/diff: learn --merge-base Denton Liu
2020-09-17  7:44   ` [PATCH v3 00/10] " Denton Liu
2020-09-17  7:44     ` [PATCH v3 01/10] t4068: remove unnecessary >tmp Denton Liu
2020-09-17  7:44     ` [PATCH v3 02/10] git-diff-index.txt: make --cached description a proper sentence Denton Liu
2020-09-17  7:44     ` [PATCH v3 03/10] git-diff.txt: backtick quote command text Denton Liu
2020-09-17  7:44     ` [PATCH v3 04/10] contrib/completion: extract common diff/difftool options Denton Liu
2020-09-17  7:44     ` [PATCH v3 05/10] diff-lib: accept option flags in run_diff_index() Denton Liu
2020-09-17 17:00       ` Junio C Hamano
2020-09-17  7:44     ` [PATCH v3 06/10] diff-lib: define diff_get_merge_base() Denton Liu
2020-09-17 17:16       ` Junio C Hamano
2020-09-18 10:34         ` Denton Liu
2020-09-19  0:33           ` Junio C Hamano
2020-09-17  7:44     ` [PATCH v3 07/10] t4068: add --merge-base tests Denton Liu
2020-09-17  7:44     ` [PATCH v3 08/10] builtin/diff-index: learn --merge-base Denton Liu
2020-09-17 17:28       ` Junio C Hamano
2020-09-17 18:13         ` Jeff King
2020-09-18  5:11           ` Junio C Hamano
2020-09-18 18:12             ` Jeff King
2020-09-17  7:44     ` [PATCH v3 09/10] builtin/diff-tree: " Denton Liu
2020-09-17 18:23       ` Junio C Hamano
2020-09-18 10:48         ` Denton Liu
2020-09-18 16:52           ` Junio C Hamano
2020-09-20 11:01             ` Denton Liu
2020-09-21 16:05               ` Junio C Hamano
2020-09-21 17:27                 ` Denton Liu
2020-09-21 21:09                   ` Junio C Hamano
2020-09-21 21:19                     ` Junio C Hamano
2020-09-21 21:54                     ` Denton Liu
2020-09-21 22:18                       ` Junio C Hamano
2020-09-23  9:47                         ` Denton Liu
2020-09-25 21:02                           ` Junio C Hamano
2020-09-26  1:52                             ` Denton Liu
2020-09-17  7:44     ` [PATCH v3 10/10] contrib/completion: complete `git diff --merge-base` Denton Liu
2020-09-20 11:22     ` [PATCH v4 00/10] builtin/diff: learn --merge-base Denton Liu
2020-09-20 11:22       ` [PATCH v4 01/10] t4068: remove unnecessary >tmp Denton Liu
2020-09-20 11:22       ` [PATCH v4 02/10] git-diff-index.txt: make --cached description a proper sentence Denton Liu
2020-09-20 11:22       ` [PATCH v4 03/10] git-diff.txt: backtick quote command text Denton Liu
2020-09-20 11:22       ` [PATCH v4 04/10] contrib/completion: extract common diff/difftool options Denton Liu
2020-09-20 11:22       ` [PATCH v4 05/10] diff-lib: accept option flags in run_diff_index() Denton Liu
2020-09-20 11:22       ` [PATCH v4 06/10] diff-lib: define diff_get_merge_base() Denton Liu
2020-09-20 11:22       ` [PATCH v4 07/10] t4068: add --merge-base tests Denton Liu
2020-09-20 11:22       ` [PATCH v4 08/10] builtin/diff-index: learn --merge-base Denton Liu
2020-09-29 19:53         ` Martin Ågren
2020-09-20 11:22       ` [PATCH v4 09/10] builtin/diff-tree: " Denton Liu
2020-09-20 11:22       ` [PATCH v4 10/10] contrib/completion: complete `git diff --merge-base` Denton Liu

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