linux-kernel - Re: [PATCH v3] checkpatch: allow URL >80 chars

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Date:   Tue, 21 Nov 2017 17:05:43 -0800
From:   Joe Perches <joe@...ches.com>
To:     Andreas Brauchli <a.brauchli@...mentarea.net>,
        Andy Whitcroft <apw@...onical.com>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] checkpatch: allow URL >80 chars

On Tue, 2017-11-21 at 22:50 +0100, Andreas Brauchli wrote:
> 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
> only non-word (\W) and underscore characters are allowed beside the
> URL (e.g. ' /* _https://..._ */')

Perhaps you are overthinking it.

If a line contains a URL, and it's > $max_line_length,
then it's probably OK not to warn about it as as overly
long line.

I suggest:

---
 scripts/checkpatch.pl | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 95cda3ecc66b..0e42e5ebe2f0 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2875,6 +2875,7 @@ sub process {
 #	logging functions like pr_info that end in a string
 #	lines with a single string
 #	#defines that are a single string
+#	lines with an RFC3986 like URL
 #
 # There are 3 different line length message types:
 # LONG_LINE_COMMENT	a comment starts before but extends beyond $max_line_length
@@ -2906,6 +2907,10 @@ sub process {
 				 $line =~ /^\+\s*(?:\w+)?\s*DEFINE_PER_CPU/) {
 				$msg_type = "";
 
+			# URL ($rawline is used if the URL is in a comment)
+			} elsif ($rawline =~ /^\+.*\b[a-z][\w\.\+\-]*:\/\/\S+/i) {
+				$msg_type = "";
+
 			# Otherwise set the alternate message types
 
 			# a comment starts before $max_line_length