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From: Junio C Hamano <gitster@pobox.com>
To: Eric Sunshine <sunshine@sunshineco.com>
Cc: 20210217072904.16257-1-charvi077@gmail.com,
	Git List <git@vger.kernel.org>,
	Christian Couder <christian.couder@gmail.com>,
	Phillip Wood <phillip.wood123@gmail.com>,
	Charvi Mendiratta <charvi077@gmail.com>,
	Christian Couder <chriscool@tuxfamily.org>,
	Phillip Wood <phillip.wood@dunelm.org.uk>
Subject: Re: [PATCH v3 2/6] commit: add amend suboption to --fixup to create amend! commit
Date: Mon, 01 Mar 2021 14:32:18 -0800	[thread overview]
Message-ID: <xmqqlfb6mrnx.fsf@gitster.c.googlers.com> (raw)
In-Reply-To: <CAPig+cQAG3p6rhGHzBNGPUxMXQbbLZgiw-uUpizNiEWY9wm-3A@mail.gmail.com> (Eric Sunshine's message of "Mon, 1 Mar 2021 17:15:05 -0500")

Eric Sunshine <sunshine@sunshineco.com> writes:

>> +               if (len && fixup_message[len] == ':') {
>> +                       fixup_message[len++] = '\0';
>> +                       fixup_commit = fixup_message + len;
>> +                       if (starts_with("amend", fixup_message))
>> +                               fixup_prefix = "amend";
>> +                       else
>> +                               die(_("unknown option: --fixup=%s:%s"), fixup_message, fixup_commit);
>
> I haven't read ahead in the series yet, but I presume you're making
> this code extra generic because you plan to support additional `fixup`
> options (such as `reword`), but I wonder if the cognitive overhead is
> warranted or you could get by with something simpler, such as:
>
>     if (skip_prefix(msg, "amend:", &arg) ||
>         skip_prefix(msg, "reword:", &arg)) {
>         ...
>     }

You still need to compute "len" because you'd want to tell between
--fixup="HEAD^{/^area: string}" and --fixup=bogus:HEAD (the latter
would want to say "no such variant 'bogus' for --fixup", but the
colon in the former is not the end of the name of variant.

So, skip_prefix() would not buy us much, I guess.

But the use of starts_with() in the original patch is bogus, I
think.  fixup_message[] by the time the comparison is made is
NULL terminated at where the colon was originally, so we should be
doing !strcmp() to reject "--fixup=amendo:HEAD~2" with "no, 'amendo'
is not a valid variant name for --fixup option".

> Also, am I misreading when I think that the use of starts_with() could
> be replaced with a simple strcmp() since you've already inserted a
> '\0' immediately after the final alphabetic character?

Correct.


  reply	other threads:[~2021-03-02 11:59 UTC|newest]

Thread overview: 95+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-01  8:45 [PATCH v3 0/6][Outreachy] commit: Implementation of "amend!" commit Charvi Mendiratta
2021-03-01  8:45 ` [PATCH v3 1/6] sequencer: export subject_length() Charvi Mendiratta
2021-03-01 20:25   ` Eric Sunshine
2021-03-03  6:26     ` Junio C Hamano
2021-03-03  7:35     ` Charvi Mendiratta
2021-03-01  8:45 ` [PATCH v3 2/6] commit: add amend suboption to --fixup to create amend! commit Charvi Mendiratta
2021-03-01 18:34   ` Junio C Hamano
2021-03-03  7:32     ` Charvi Mendiratta
2021-03-01 22:15   ` Eric Sunshine
2021-03-01 22:32     ` Junio C Hamano [this message]
2021-03-01 22:47       ` Eric Sunshine
2021-03-03  7:42         ` Charvi Mendiratta
2021-03-03  7:41       ` Charvi Mendiratta
2021-03-03  7:57         ` Eric Sunshine
2021-03-03 19:21           ` Charvi Mendiratta
2021-03-04  0:58           ` Junio C Hamano
2021-03-04  9:01             ` Charvi Mendiratta
2021-03-03  7:37     ` Charvi Mendiratta
2021-03-03  7:46       ` Eric Sunshine
2021-03-03 19:21         ` Charvi Mendiratta
2021-03-01  8:45 ` [PATCH v3 3/6] commit: add a reword suboption to --fixup Charvi Mendiratta
2021-03-01 18:41   ` Junio C Hamano
2021-03-03  7:33     ` Charvi Mendiratta
2021-03-01 22:36   ` Eric Sunshine
2021-03-03  7:41     ` Charvi Mendiratta
2021-03-01  8:45 ` [PATCH v3 4/6] t7500: add tests for --fixup=[amend|reword] options Charvi Mendiratta
2021-03-02  5:43   ` Eric Sunshine
2021-03-03  6:28     ` Junio C Hamano
2021-03-03  7:43     ` Charvi Mendiratta
2021-03-01  8:45 ` [PATCH v3 5/6] t3437: use --fixup with options to create amend! commit Charvi Mendiratta
2021-03-01  8:45 ` [PATCH v3 6/6] doc/git-commit: add documentation for fixup=[amend|reword] options Charvi Mendiratta
2021-03-01 18:44   ` Junio C Hamano
2021-03-03  7:33     ` Charvi Mendiratta
2021-03-02  6:39   ` Eric Sunshine
2021-03-03  7:43     ` Charvi Mendiratta
2021-03-03  8:18       ` Eric Sunshine
2021-03-03 19:22         ` Charvi Mendiratta
2021-03-04  1:05         ` Junio C Hamano
2021-03-04  9:00           ` Charvi Mendiratta
2021-03-04 22:18             ` Junio C Hamano
2021-03-05  6:14               ` Charvi Mendiratta
2021-03-05 18:25                 ` Junio C Hamano
2021-03-06  4:13                   ` Charvi Mendiratta
2021-03-06  6:11                     ` Eric Sunshine
2021-03-01 18:45 ` [PATCH v3 0/6][Outreachy] commit: Implementation of "amend!" commit Junio C Hamano
2021-03-03  7:33   ` Charvi Mendiratta
2021-03-10 19:43 ` [PATCH v4 " Charvi Mendiratta
2021-03-11  8:06   ` Eric Sunshine
2021-03-11 15:24     ` Charvi Mendiratta
2021-03-13 13:40   ` [PATCH v5 " Charvi Mendiratta
2021-03-13 13:40   ` [PATCH v5 1/6] sequencer: export and rename subject_length() Charvi Mendiratta
2021-03-13 13:40   ` [PATCH v5 2/6] commit: add amend suboption to --fixup to create amend! commit Charvi Mendiratta
2021-03-14  1:32     ` Eric Sunshine
2021-03-13 13:40   ` [PATCH v5 3/6] commit: add a reword suboption to --fixup Charvi Mendiratta
2021-03-13 13:40   ` [PATCH v5 4/6] t7500: add tests for --fixup=[amend|reword] options Charvi Mendiratta
2021-03-13 13:40   ` [PATCH v5 5/6] t3437: use --fixup with options to create amend! commit Charvi Mendiratta
2021-03-13 13:40   ` [PATCH v5 6/6] doc/git-commit: add documentation for fixup=[amend|reword] options Charvi Mendiratta
2021-03-14  1:10     ` Eric Sunshine
2021-03-14 13:57       ` Charvi Mendiratta
2021-03-15  7:54   ` [PATCH v6 0/6][Outreachy] commit: Implementation of "amend!" commit Charvi Mendiratta
2021-03-19  0:52     ` Junio C Hamano
2021-03-19  3:16       ` Eric Sunshine
2021-03-19 14:10         ` Charvi Mendiratta
2021-03-15  7:54   ` [PATCH v6 1/6] sequencer: export and rename subject_length() Charvi Mendiratta
2021-03-15  7:54   ` [PATCH v6 2/6] commit: add amend suboption to --fixup to create amend! commit Charvi Mendiratta
2021-03-15  7:54   ` [PATCH v6 3/6] commit: add a reword suboption to --fixup Charvi Mendiratta
2021-03-15  7:54   ` [PATCH v6 4/6] t7500: add tests for --fixup=[amend|reword] options Charvi Mendiratta
2021-03-15  7:54   ` [PATCH v6 5/6] t3437: use --fixup with options to create amend! commit Charvi Mendiratta
2021-03-15  7:54   ` [PATCH v6 6/6] doc/git-commit: add documentation for fixup=[amend|reword] options Charvi Mendiratta
2021-03-10 19:43 ` [PATCH v4 1/6] sequencer: export and rename subject_length() Charvi Mendiratta
2021-03-10 19:43 ` [PATCH v4 2/6] commit: add amend suboption to --fixup to create amend! commit Charvi Mendiratta
2021-03-11  6:25   ` Eric Sunshine
2021-03-11 15:24     ` Charvi Mendiratta
2021-03-11 17:07       ` Eric Sunshine
2021-03-11 17:51         ` Charvi Mendiratta
2021-03-14  2:25         ` Junio C Hamano
2021-03-14 13:58           ` Charvi Mendiratta
2021-03-14 22:43             ` Junio C Hamano
2021-03-14 23:07               ` Eric Sunshine
2021-03-15  7:59                 ` Charvi Mendiratta
2021-03-15  8:16                   ` Eric Sunshine
2021-03-15  9:35                     ` Charvi Mendiratta
2021-03-10 19:43 ` [PATCH v4 3/6] commit: add a reword suboption to --fixup Charvi Mendiratta
2021-03-11  0:31   ` Junio C Hamano
2021-03-11  4:01     ` Charvi Mendiratta
2021-03-11  5:37       ` Junio C Hamano
2021-03-11  6:37         ` Eric Sunshine
2021-03-11 15:23         ` Charvi Mendiratta
2021-03-10 19:43 ` [PATCH v4 4/6] t7500: add tests for --fixup=[amend|reword] options Charvi Mendiratta
2021-03-10 19:43 ` [PATCH v4 5/6] t3437: use --fixup with options to create amend! commit Charvi Mendiratta
2021-03-10 19:43 ` [PATCH v4 6/6] doc/git-commit: add documentation for fixup=[amend|reword] options Charvi Mendiratta
2021-03-11  0:30   ` Junio C Hamano
2021-03-11  4:02     ` Charvi Mendiratta
2021-03-11  7:48   ` Eric Sunshine
2021-03-11 15:24     ` Charvi Mendiratta

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