linux-kernel - Re: [PATCH 3/3] checkpatch: Add --showfile to allow input via pipe to show filenames

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Date:	Thu, 04 Jun 2015 05:40:55 -0700
From:	Joe Perches <joe@...ches.com>
To:	Petr Mladek <pmladek@...e.cz>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Andy Whitcroft <apw@...onical.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] checkpatch: Add --showfile to allow input via pipe
 to show filenames

On Thu, 2015-06-04 at 14:18 +0200, Petr Mladek wrote:
> On Wed 2015-06-03 08:53:40, Joe Perches wrote:
> > Using "git diff | ./scripts/checkpatch -" does not have an
> > easy mechanism to see the files and lines actually modified.
> > 
> > Add --showfile to see the file and line specified in the diff.
> > 
> > When --showfile is used without --terse, the second line of each
> > message output is redundant, so it is removed.
> 
> > Signed-off-by: Joe Perches <joe@...ches.com>
> 
> I like idea but there is a problem, see below.
[]
> > @@ -5606,7 +5618,7 @@ sub process {
> >  		ERROR("NOT_UNIFIED_DIFF",
> >  		      "Does not appear to be a unified-diff format patch\n");
> >  	}
> > -	if ($is_patch && $chk_signoff && $signoff == 0) {
> > +	if ($is_patch && $filename ne '-' && $chk_signoff && $signoff == 0) {
> 
> You might use also "cat $patch | ./scripts/checkpatch -" and in this
> case you would want to print the warning.

Yeah, but I'm not straining for likely unusual use-cases.

> It still prints invalid filename:linenum when you call:
> ./scripts/checkpatch 0001-my-commit.patch

I don't see this.
It prints the file/line of the patch without -terse
just as before.

> A better solution would be to omit the filename:linenum information
> for this patch-specific messages or print the patchname instead of
> the filename.

Anyway, I think the patch appropriate to apply
for now and I'll ponder and listen to suggestions
for improvement later.

cheers, Joe

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