linux-kernel - Re: [PATCH] checkpatch: Require author Signed-off-by

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Date:   Tue, 10 Jul 2018 08:27:56 -0700
From:   Joe Perches <joe@...ches.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Geert Uytterhoeven <geert+renesas@...der.be>,
        Andy Whitcroft <apw@...onical.com>, jgg@...lanox.com,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Linus Walleij <linus.walleij@...aro.org>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] checkpatch: Require author Signed-off-by

On Tue, 2018-07-10 at 17:07 +0200, Geert Uytterhoeven wrote:
> Hi Joe,

Hi Geert

> On Tue, Jul 10, 2018 at 4:34 PM Joe Perches <joe@...ches.com> wrote:
> > On Tue, 2018-07-10 at 14:10 +0200, Geert Uytterhoeven wrote:
> > > Print an error if none of the Signed-off-by lines cover the patch
> > > author.
> > 
> > []
> > > diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> > 
> > []
> > > @@ -13,6 +13,7 @@ use POSIX;
> > >  use File::Basename;
> > >  use Cwd 'abs_path';
> > >  use Term::ANSIColor qw(:constants);
> > > +use MIME::Words 'decode_mimewords';
> > 
> > Is this a typically installed perl module?
> > If so, what perl version installed it by default?
> 
> I don't know. At least my Ubuntu 16.04LTS and 18.04LTS systems had it
> installed.
> It does not seem to be part of the core modules, cfr.
> https://perldoc.perl.org/index-modules-M.html
> 
> I've tried using MIME::QuotedPrint instead, but then we need to parse
> =?UTF-8?q? ourselves, as decode_qp() only transforms the actual
> quoted printable bits in side the encoded From: address.

I'd looked too and couldn't find it from 5.10 forward,
so I'd prefer not requiring that module.

Also, the From: line is also an email header and I don't
believe it should be used author information in the
same way as a patch From: line.

So likely the

+# Check the patch for a From:
+               if ($line =~ /^\s*From: (.*)/i) {

should be "if ($in_commit_log && $line =~ /^\s*From: (.*)/) {

with some regex or function to remove the MIME encoded word.