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Subject: Re: [PATCH v3] checkpatch: add dedicated checker for 'Fixes:' tag
To:     Wang YanQing <udknight@gmail.com>, Joe Perches <joe@perches.com>,
        Andy Whitcroft <apw@canonical.com>,
        kernel-janitors@vger.kernel.org
References: <20200428020223.GA28074@udknight>
From:   Markus Elfring <Markus.Elfring@web.de>
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Cc:     linux-kernel@vger.kernel.org,
        Alexei Starovoitov <alexei.starovoitov@gmail.com>,
        Matteo Croce <mcroce@redhat.com>
Message-ID: <35069ae9-cdb4-4728-5e94-6d863dd2721c@web.de>
Date:   Tue, 28 Apr 2020 08:21:37 +0200
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> ...
> Do not split the tag across multiple
> lines, tags are exempt from the "wrap at 75 columns" rule in order to si=
mplify
> parsing scripts
> ...

I suggest to reformat the quotation.

=E2=80=9C=E2=80=A6
Do not split the tag across multiple lines, tags are exempt from
the "wrap at 75 columns" rule in order to simplify parsing scripts.
=E2=80=A6=E2=80=9D


> And there is no 'Fixes:' tag format checker in checkpatch to check
> the commit id length too, so let's add dedicated checker to check
> these conditions for 'Fixes:' tag.

It seems that there are further challenges to consider for an imperative w=
ording
in such a change description.

How do you think about the following wording variant?

   The script =E2=80=9Ccheckpatch.pl=E2=80=9D did not provide a check for =
the commit
   identification length. Thus add a dedicated check.


>  v2-v3

I would find a shorter version identification (without the arrow)
also sufficient.


>  1:No modification to GIT_COMMIT_ID checker.

Would you like to add a space character for the item enumeration?


>    I make a mistake previously, =E2=80=A6

Would you like to use the word =E2=80=9Cmade=E2=80=9D here?


> +		    my $id =3D '0123456789ab';
> +		    my $orig_desc =3D "commit description";

How much do these variable initialisations matter?


> +			$lines =3D 0 if ($1 =3D~ /^\(\"(?:.*)\"\)$/i);

I wonder why you see a need to use a non-capturing group in such
a regular expression (when no alternatives were specified there).


> +				ERROR("FIXES_TAG",
> +					"Please use 'Fixes:' tag with commit description style '<12+ chars=
 of sha1> (\"<title line>\")', and the title line doesn't across multiple =
lines - ie: '$fixes_tag_fmt'\n" . $herecurr);

* Would we like to support any other quotation characters around
  the commit summary?

* I propose to split the error message.
  May it become multi-line?

* How do you think about another wording variant?

  The title must be specified as a single line (without line breaks).

* Would you like to point questionable commit titles out?

Regards,
Markus