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Subject[PATCH v6] checkpatch.pl: Add SPDX license tag check
Date
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>
---
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)$/);

--
2.14.1
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