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checkpatch.pl: add SPDX license tag check 

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.

Link: http://lkml.kernel.org/r/20180202154026.15298-1-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Philippe Ombredanne <pombredanne@nexb.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Joe Perches <joe@perches.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Igor Stoppa <igor.stoppa@huawei.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Rob Herring 2018-04-10 16:33:13 -07:00 committed by Linus Torvalds
parent 85e12066ea
commit 9f3a89926d
1 changed files with 27 additions and 0 deletions
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27
scripts/checkpatch.pl
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@ -2257,6 +2257,8 @@ sub process {
my $camelcase_file_seeded = 0;
my $checklicenseline = 1;
sanitise_line_reset();
my $line;
foreach my $rawline (@rawlines) {
@ -2448,6 +2450,7 @@ sub process {
} else {
$check = $check_orig;
}
$checklicenseline = 1;
next;
}
@ -2911,6 +2914,30 @@ sub process {
}
}
# check for using SPDX license tag at beginning of files
if ($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)$/);