linux-kernel - Re: [PATCH] checkpatch: Remove obsolete period from "ambiguous SHA1" query

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Date:   Fri, 30 Aug 2019 11:01:29 -0700
From:   Joe Perches <joe@...ches.com>
To:     Sean Christopherson <sean.j.christopherson@...el.com>
Cc:     Andy Whitcroft <apw@...onical.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] checkpatch: Remove obsolete period from "ambiguous
 SHA1" query

On Fri, 2019-08-30 at 10:17 -0700, Sean Christopherson wrote:
> On Fri, Aug 30, 2019 at 09:37:51AM -0700, Joe Perches wrote:
> > On Fri, 2019-08-30 at 09:31 -0700, Sean Christopherson wrote:
> > > Git dropped the period from its "ambiguous SHA1" error message in commit
> > > 0c99171ad2 ("get_short_sha1: mark ambiguity error for translation"),
> > > circa 2016.  Drop the period from checkpatch's associated query so as to
> > > match both the old and new error messages.
> > > 
> > > Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
> > > ---
> > >  scripts/checkpatch.pl | 2 +-
> > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > 
> > > diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> > > index 93a7edfe0f05..ef3642c53100 100755
> > > --- a/scripts/checkpatch.pl
> > > +++ b/scripts/checkpatch.pl
> > > @@ -962,7 +962,7 @@ sub git_commit_info {
> > >  
> > >  	return ($id, $desc) if ($#lines < 0);
> > >  
> > > -	if ($lines[0] =~ /^error: short SHA1 $commit is ambiguous\./) {
> > > +	if ($lines[0] =~ /^error: short SHA1 $commit is ambiguous/) {
> > >  # Maybe one day convert this block of bash into something that returns
> > >  # all matching commit ids, but it's very slow...
> > >  #
> > 
> > Thanks.
> > 
> > Did git ever change to actually support human readable
> > messages in multiple languages?
> 
> Yep, e.g.:
> 
>   error: Kurzer SHA-1 745f ist mehrdeutig.
> 
> > If so, this won't work for non-english output.
> 
> Yep again.  The next check for 'fatal: ambiguous argument' obviously fails
> as well and checkpatch ends up using git's error message as the id and
> description.
> 
>   ERROR: Please use git ... - ie: 'commit error: Kurze ("")'

Does git exit with unique failure codes?
If so, maybe the waitid/siginfo_t error could be used instead.