Re: [PATCH v6] checkpatch.pl: Add SPDX license tag check

[Joe Perches <joe@perches.com>]

On Fri, 2018-02-02 at 13:18 -0800, Joe Perches wrote:
> On Fri, 2018-02-02 at 09:40 -0600, Rob Herring wrote:
> > Add SPDX license tag check based on the rules defined in
> > Documentation/process/license-rules.rst. To summarize, SPDX license tags
> > should be on the 1st line (or 2nd line in scripts) using the appropriate
> > comment style for the file type.
> > 
> > Cc: Andy Whitcroft <apw@canonical.com>
> > Cc: Joe Perches <joe@perches.com>
> > Cc: Thomas Gleixner <tglx@linutronix.de>
> > Cc: Philippe Ombredanne <pombredanne@nexb.com>
> > Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > Signed-off-by: Rob Herring <robh@kernel.org>
> 
> Signed-off-by: Joe Perches <joe@perches.com>

Andrew, would you pick this up please?

> > ---
> > v6:
> > - Dropped script extension check and only look for #!/... on 1st line. A 
> >   text executable file was not reliable either.
> > - Support .awk and .tc which may or may not have a #!/.
> > - Fixed a typo in script "#!" regex and also match on first /.
> > - Add Greg's ack.
> > 
> >  scripts/checkpatch.pl | 27 +++++++++++++++++++++++++++
> >  1 file changed, 27 insertions(+)
> > 
> > diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> > index ba03f17ff662..6db245e5f93b 100755
> > --- a/scripts/checkpatch.pl
> > +++ b/scripts/checkpatch.pl
> > @@ -2225,6 +2225,8 @@ sub process {
> >  
> >  	my $camelcase_file_seeded = 0;
> >  
> > +	my $checklicenseline = 1;
> > +
> >  	sanitise_line_reset();
> >  	my $line;
> >  	foreach my $rawline (@rawlines) {
> > @@ -2416,6 +2418,7 @@ sub process {
> >  			} else {
> >  				$check = $check_orig;
> >  			}
> > +			$checklicenseline = 1;
> >  			next;
> >  		}
> >  
> > @@ -2866,6 +2869,30 @@ sub process {
> >  			}
> >  		}
> >  
> > +# check for using SPDX license tag at beginning of files
> > +		if ($realline == $checklicenseline) {
> > +			if ($rawline =~ /^[ \+]\s*\#\!\s*\//) {
> > +				$checklicenseline = 2;
> > +			} elsif ($rawline =~ /^\+/) {
> > +				my $comment = "";
> > +				if ($realfile =~ /\.(h|s|S)$/) {
> > +					$comment = '/*';
> > +				} elsif ($realfile =~ /\.(c|dts|dtsi)$/) {
> > +					$comment = '//';
> > +				} elsif (($checklicenseline == 2) || $realfile =~ /\.(sh|pl|py|awk|tc)$/) {
> > +					$comment = '#';
> > +				} elsif ($realfile =~ /\.rst$/) {
> > +					$comment = '..';
> > +				}
> > +
> > +				if ($comment !~ /^$/ &&
> > +				    $rawline !~ /^\+\Q$comment\E SPDX-License-Identifier: /) {
> > +					WARN("SPDX_LICENSE_TAG",
> > +					     "Missing or malformed SPDX-License-Identifier tag in line $checklicenseline\n" . $herecurr);
> > +				}
> > +			}
> > +		}
> > +
> >  # check we are in a valid source file if not then ignore this hunk
> >  		next if ($realfile !~ /\.(h|c|s|S|sh|dtsi|dts)$/);
> >