linux-kernel - Re: [PATCH] scripts/checkpatch.pl: add a check for the patch level (patch -p<num>)

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Date:	Fri, 21 Dec 2007 18:12:02 +0000
From:	Andy Whitcroft <apw@...dowen.org>
To:	bbpetkov@...oo.de, rdunlap@...otime.net, jschopp@...tin.ibm.com,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] scripts/checkpatch.pl: add a check for the patch level (patch -p<num>)

On Tue, Dec 18, 2007 at 06:46:41AM +0100, Borislav Petkov wrote:
> On Mon, Dec 17, 2007 at 08:11:05AM +0100, Borislav Petkov wrote:
> 
> A slightly microoptimized version 1.1:
> 
> ---
> From: Borislav Petkov <bbpetkov@...oo.de>
> 
> 
> Check the patch level of the single hunks in a patch file, however only when
> checkpatch.pl is called from within the kernel tree.
> 
> Signed-off-by: Borislav Petkov <bbpetkov@...oo.de>
> --
> 
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> index 579f50f..3eda27b 100755
> --- a/scripts/checkpatch.pl
> +++ b/scripts/checkpatch.pl
> @@ -653,6 +653,18 @@ sub CHK {
>  	}
>  }
>  
> +sub check_patchlevel {
> +
> +	if ($tree) {
> +		my ($path) = @_;
> +		$path =~ s![^/]*/!!;
> +
> +		if (!stat($path)) {
> +			WARN("Check the patchlevel (hint: patch option -p)");
> +		}
> +	}

Hmmm that will trigger on all patches which create new files if I am
grokking you correctly.

I would have thought this would pretty easy to check from the form of
the names.  Hmmm.

> +}
> +
>  sub process {
>  	my $filename = shift;
>  	my @lines = @_;
> @@ -713,10 +725,16 @@ sub process {
>  #extract the filename as it passes
>  		if ($line=~/^\+\+\+\s+(\S+)/) {
>  			$realfile=$1;
> +
> +			if ($realfile) {
> +				check_patchlevel($realfile);
> +			}
> +
>  			$realfile =~ s@^[^/]*/@@;
>  			$in_comment = 0;
>  			next;
>  		}
> +
>  #extract the line range in the file after the patch is applied
>  		if ($line=~/^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@/) {
>  			$is_patch = 1;

-apw
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