[PATCH] checkpatch: allow URL >80 chars

[Andreas Brauchli <a.brauchli@elementarea.net>]

Allow URL to exceed the 80 char limit for improved interaction in
adaption to ongoing but undocumented practice.

$ git grep -E '://\S{77}.*' -- '*.[ch]'

The patch checks that the URL is indeed on its own line in that it
allows a maximal prefix of 4 characters to account for a URL after a
comment (e.g. ' // https://...')

The URL format allows for up to 5 protocol characters before the
separator :// (e.g. https, git, ...). Additionally, an URL starting
with a "domain.tld" or "subdomain.domain" pattern (e.g.
'www.kernel.org') is also accepted.

$rawline is used in the check as comments are removed from $line.

Signed-off-by: Andreas Brauchli <andreas.brauchli@sensirion.com>
---
 scripts/checkpatch.pl | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 8b80bac055e4..aed447923354 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2904,6 +2904,11 @@ sub process {
 			} elsif ($line =~ /^\+.*\bEFI_GUID\s*\(/) {
 				$msg_type = "";
 
+			# URL (w/ minimal padding e.g. "+ // ")
+			} elsif ($rawline =~ /^\+.*?\b((?:\w{1,5}:\/\/|\w+\.\w+)\S+).*$/ &&
+				 length($rawline) - length($1) <= 5) {
+				$msg_type = "";
+
 			# Otherwise set the alternate message types
 
 			# a comment starts before $max_line_length
-- 
2.14.1