Re: [Qemu-devel] [PATCH] checkpatch: warn about missing MAINTAINERS file changes

[Thomas Huth <thuth@redhat.com>]

On 12.03.2018 14:18, Stefan Hajnoczi wrote:
> Warn if files are added/renamed/deleted without MAINTAINERS file
> changes.  This has helped me in Linux and we could benefit from this
> check in QEMU.
> 
> This patch is a manual cherry-pick of Linux commit
> 13f1937ef33950b1112049972249e6191b82e6c9 ("checkpatch: emit a warning on
> file add/move/delete") by Joe Perches <joe@perches.com>.
> 
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> ---
> Note the 80-char lines are from upstream code.  Keep them as-is.
> 
>  scripts/checkpatch.pl | 19 +++++++++++++++++++
>  1 file changed, 19 insertions(+)
> 
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> index d1fe79bcc4..d0d8f63d48 100755
> --- a/scripts/checkpatch.pl
> +++ b/scripts/checkpatch.pl
> @@ -1177,6 +1177,7 @@ sub process {
>  	our $clean = 1;
>  	my $signoff = 0;
>  	my $is_patch = 0;
> +	my $reported_maintainer_file = 0;
>  
>  	our @report = ();
>  	our $cnt_lines = 0;
> @@ -1379,6 +1380,24 @@ sub process {
>  			}
>  		}
>  
> +# Check if MAINTAINERS is being updated.  If so, there's probably no need to
> +# emit the "does MAINTAINERS need updating?" message on file add/move/delete
> +		if ($line =~ /^\s*MAINTAINERS\s*\|/) {
> +			$reported_maintainer_file = 1;
> +		}
> +
> +# Check for added, moved or deleted files
> +		if (!$reported_maintainer_file &&
> +		    ($line =~ /^(?:new|deleted) file mode\s*\d+\s*$/ ||
> +		     $line =~ /^rename (?:from|to) [\w\/\.\-]+\s*$/ ||
> +		     ($line =~ /\{\s*([\w\/\.\-]*)\s*\=\>\s*([\w\/\.\-]*)\s*\}/ &&
> +		      (defined($1) || defined($2))))) {
> +			$is_patch = 1;
> +			$reported_maintainer_file = 1;
> +			WARN("added, moved or deleted file(s), does MAINTAINERS need updating?\n" .
> +				$herecurr);

Could you please turn this into a notification instead of a warning? For
rationale, please see the discussion of this patch last year:

http://lists.gnu.org/archive/html/qemu-devel/2017-01/msg05753.html

 Thanks,
  Thomas