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

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Date:   Thu, 03 Nov 2022 18:27:35 -0700
From:   Joe Perches <joe@...ches.com>
To:     Peter Collingbourne <pcc@...gle.com>,
        Bjorn Helgaas <helgaas@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     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, 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) {
 			WARN("PREFER_LORE_ARCHIVE",
 			     "Use lore.kernel.org archive links when possible - see https://lore.kernel.org/lists.html\n" . $herecurr);
 		}