linux-kernel - Re: [PATCH] checkpatch: add --fix option for OPEN

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Date:   Wed, 18 Nov 2020 11:58:46 -0800
From:   Joe Perches <joe@...ches.com>
To:     Dwaipayan Ray <dwaipayanray1@...il.com>
Cc:     linux-kernel-mentees@...ts.linuxfoundation.org,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Lukas Bulwahn <lukas.bulwahn@...il.com>
Subject: Re: [PATCH] checkpatch: add --fix option for OPEN_BRACE issues

On Thu, 2020-11-19 at 00:15 +0530, Dwaipayan Ray wrote:
> On Thu, Nov 19, 2020 at 12:09 AM Joe Perches <joe@...ches.com> wrote:
> > 
> > On Thu, 2020-11-19 at 00:03 +0530, Dwaipayan Ray wrote:
> > > On Wed, Nov 18, 2020 at 11:44 PM Joe Perches <joe@...ches.com> wrote:
> > > > 
> > > > On Wed, 2020-11-18 at 18:10 +0530, Dwaipayan Ray wrote:
> > > > > Brace style misuses of the following types are now
> > > > > corrected:
> > > > []
> > > > > diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> > > > []
> > > > > @@ -3937,9 +3937,23 @@ sub process {
> > > > >                       #print "pre<$pre_ctx>\nline<$line>\nctx<$ctx>\nnext<$lines[$ctx_ln - 1]>\n";
> > > > > 
> > > > > 
> > > > >                       if ($ctx !~ /{\s*/ && defined($lines[$ctx_ln - 1]) && $lines[$ctx_ln - 1] =~ /^\+\s*{/) {
> > > > > -                             ERROR("OPEN_BRACE",
> > > > > -                                   "that open brace { should be on the previous line\n" .
> > > > > -                                     "$here\n$ctx\n$rawlines[$ctx_ln - 1]\n");
> > > > > +                             if (ERROR("OPEN_BRACE",
> > > > > +                                       "that open brace { should be on the previous line\n" .
> > > > > +                                             "$here\n$ctx\n$rawlines[$ctx_ln - 1]\n") &&
> > > > > +                                 $fix) {
> > > > > +                                     my $line1 = $rawlines[$ctx_ln - 2];
> > > > 
> > > > How are you sure that in a patch context this line always starts with /^\+/ ?
> > > 
> > > Hi,
> > > I followed it from the other fixes for OPEN_BRACE which were already
> > > there. In the patch context if the lines are added then only I think the fix
> > > should be triggered. Other instances should not be modified.
> > 
> > As far as I know there are no existing uses of --fix with OPEN_BRACE.
> > 
> 
> I think you added it via 8d1824780f2f1 ("checkpatch: add --fix option
> for a couple OPEN_BRACE misuses")

The difference here is that you are dealing with a $stat context and
the existing --fix entries are just for single line fixes.