linux-kernel - Re: [PATCH] checkpatch: use patch subject when reading from stdin

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Date:   Tue, 8 Oct 2019 14:59:15 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Joe Perches <joe@...ches.com>
Cc:     Geert Uytterhoeven <geert+renesas@...der.be>,
        Andy Whitcroft <apw@...onical.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] checkpatch: use patch subject when reading from stdin

Hi Joe,

On Tue, Oct 8, 2019 at 2:50 PM Joe Perches <joe@...ches.com> wrote:
> On Tue, 2019-10-08 at 11:40 +0200, Geert Uytterhoeven wrote:
> > When reading a patch file from standard input, checkpatch calls it "Your
> > patch", and reports its state as:
> >
> >     Your patch has style problems, please review.
> >
> > or:
> >
> >     Your patch has no obvious style problems and is ready for submission.
> >
> > Hence when checking multiple patches by piping them to checkpatch, e.g.
> > when checking patchwork bundles using:
> >
> >     formail -s scripts/checkpatch.pl < bundle-foo.mbox
> >
> > it is difficult to identify which patches need to be reviewed and
> > improved.
> >
> > Fix this by replacing "Your patch" by the patch subject, if present.
>
> Seems sensible, thanks Geert
>
> > Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
> > ---
> >  scripts/checkpatch.pl | 4 ++++
> >  1 file changed, 4 insertions(+)
> >
> > diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> > index 6fcc66afb0880830..6b9feb4d646a116b 100755
> > --- a/scripts/checkpatch.pl
> > +++ b/scripts/checkpatch.pl
> > @@ -1047,6 +1047,10 @@ for my $filename (@ARGV) {
> >       }
> >       while (<$FILE>) {
> >               chomp;
> > +             if ($vname eq 'Your patch') {
> > +                     my ($subject) = $_ =~ /^Subject:\s*(.*)/;
> > +                     $vname = '"' . $subject . '"' if $subject;
>
> trivia:
>
> Not a big deal and is likely good enough but this will
> cut off subjects that are continued on multiple lines.
>
> e.g.:
>
> Subject: [PATCH Vx n/M] very long description with a subject spanning
>  multiple lines
> From: patch submitter <submitter@...ain.tld>

I know.

Fixing that is not that simple, I'm afraid.
And $vname is used before process() is called.

>
> > +             }
> >               push(@rawlines, $_);
> >       }
> >       close($FILE);
>


-- 
Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds