linux-kernel - Re: [PATCH] checkpatch.pl: Relax commit ID check to allow more than 12 chars

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Message-ID: <Y9mBYEAq/g42s/S2@probook>
Date:   Tue, 31 Jan 2023 22:00:16 +0100
From:   Jonathan Neuschäfer <j.neuschaefer@....net>
To:     Joe Perches <joe@...ches.com>
Cc:     Jonathan Neuschäfer <j.neuschaefer@....net>,
        linux-kernel@...r.kernel.org, Andy Whitcroft <apw@...onical.com>,
        Dwaipayan Ray <dwaipayanray1@...il.com>,
        Lukas Bulwahn <lukas.bulwahn@...il.com>
Subject: Re: [PATCH] checkpatch.pl: Relax commit ID check to allow more than
 12 chars

On Sun, Jan 29, 2023 at 09:52:38AM -0800, Joe Perches wrote:
> On Sun, 2023-01-29 at 13:34 +0100, Jonathan Neuschäfer wrote:
> > By now, `git log --pretty=%h` (on my copy of linux.git) prints commit
> > hashes with 13 digits, because of the number of objects.
> > 
> > Relax the rule in checkpatch.pl to allow a few more digits (up to 16).
> 
> NAK without updating the process docs first.

Good point, I'll do that.

Thanks,
Jonathan

> 
> Documentation/process/submitting-patches.rst-If your patch fixes a bug in a specific commit, e.g. you found an issue using
> Documentation/process/submitting-patches.rst:``git bisect``, please use the 'Fixes:' tag with the first 12 characters of
> Documentation/process/submitting-patches.rst-the SHA-1 ID, and the one line summary.  Do not split the tag across multiple
> Documentation/process/submitting-patches.rst-lines, tags are exempt from the "wrap at 75 columns" rule in order to simplify
> Documentation/process/submitting-patches.rst-parsing scripts.  For example::
> Documentation/process/submitting-patches.rst-
> Documentation/process/submitting-patches.rst-   Fixes: 54a4f0239f2e ("KVM: MMU: make kvm_mmu_zap_page() return the number of pages it actually fr>
> Documentation/process/submitting-patches.rst-
> Documentation/process/submitting-patches.rst-The following ``git config`` settings can be used to add a pretty format for
> Documentation/process/submitting-patches.rst-outputting the above style in the ``git log`` or ``git show`` commands::
> Documentation/process/submitting-patches.rst-
> Documentation/process/submitting-patches.rst-   [core]
> Documentation/process/submitting-patches.rst:           abbrev = 12
> Documentation/process/submitting-patches.rst-   [pretty]
> Documentation/process/submitting-patches.rst-           fixes = Fixes: %h (\"%s\")
> 
> > diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> []
> > @@ -3177,7 +3177,7 @@ sub process {
> >  				$tag_case = 0 if $tag eq "Fixes:";
> >  				$tag_space = 0 if ($line =~ /^fixes:? [0-9a-f]{5,} ($balanced_parens)/i);
> > 
> > -				$id_length = 0 if ($orig_commit =~ /^[0-9a-f]{12}$/i);
> > +				$id_length = 0 if ($orig_commit =~ /^[0-9a-f]{12,16}$/i);
> >  				$id_case = 0 if ($orig_commit !~ /[A-F]/);
> > 
> >  				# Always strip leading/trailing parens then double quotes if existing
> > @@ -3194,7 +3194,7 @@ sub process {
> >  			if ($ctitle ne $title || $tag_case || $tag_space ||
> >  			    $id_length || $id_case || !$title_has_quotes) {
> >  				if (WARN("BAD_FIXES_TAG",
> > -				     "Please use correct Fixes: style 'Fixes: <12 chars of sha1> (\"<title line>\")' - ie: 'Fixes: $cid (\"$ctitle\")'\n" . $herecurr) &&
> > +				     "Please use correct Fixes: style 'Fixes: <12-16 chars of sha1> (\"<title line>\")' - ie: 'Fixes: $cid (\"$ctitle\")'\n" . $herecurr) &&
> >  				    $fix) {
> >  					$fixed[$fixlinenr] = "Fixes: $cid (\"$ctitle\")";
> >  				}
> > --
> > 2.39.0
> > 
> 

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