linux-kernel - Re: [PATCH] checkpatch: add warning for non-lore mailing list URLs

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Date:   Thu, 3 Nov 2022 18:34:31 -0700
From:   Peter Collingbourne <pcc@...gle.com>
To:     Joe Perches <joe@...ches.com>
Cc:     Bjorn Helgaas <helgaas@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andy Whitcroft <apw@...onical.com>,
        Dwaipayan Ray <dwaipayanray1@...il.com>,
        Lukas Bulwahn <lukas.bulwahn@...il.com>,
        Kees Cook <keescook@...omium.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        linux-kernel@...r.kernel.org, Bjorn Helgaas <bhelgaas@...gle.com>
Subject: Re: [PATCH] checkpatch: add warning for non-lore mailing list URLs

On Thu, Nov 3, 2022 at 6:27 PM Joe Perches <joe@...ches.com> wrote:
>
> On Thu, 2022-11-03 at 18:07 -0700, Peter Collingbourne wrote:
> > On Wed, Oct 19, 2022 at 03:28:43PM -0500, Bjorn Helgaas wrote:
> > > From: Bjorn Helgaas <bhelgaas@...gle.com>
> > >
> > > The lkml.org, marc.info, spinics.net, etc archives are not quite as useful
> > > as lore.kernel.org because they use different styles, add advertising, and
> > > may disappear in the future.  The lore archives are more consistent and
> > > more likely to stick around, so prefer https://lore.kernel.org URLs when
> > > they exist.
> >
> > If the commit message contains a line like:
> >
> > Cc: linux-arm-kernel@...ts.infradead.org
> >
> > this patch causes checkpatch.pl to complain. Would it be possible to
> > restrict this to URLs?
>
> Yes, I believe this would probably work well enough:
> ---
>  scripts/checkpatch.pl | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> index 7be93c3df2bcb..fe25642d8bacc 100755
> --- a/scripts/checkpatch.pl
> +++ b/scripts/checkpatch.pl
> @@ -3336,7 +3336,8 @@ sub process {
>                 }
>
>  # Check for mailing list archives other than lore.kernel.org
> -               if ($rawline =~ m{\b$obsolete_archives}) {
> +               if ($rawline =~ m{\b$obsolete_archives} &&
> +                   $rawline !~ /^\s*cc:/i) {

Can we make this (to|cc): instead? Otherwise developers (like me) who
use custom scripts to add To: headers to their patches before passing
them to checkpatch.pl will also hit this warning if their patch is
being sent To: one of these mailing lists.

Peter