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From:   Matthieu Baerts <matthieu.baerts@tessares.net>
Date:   Thu, 30 Mar 2023 20:13:24 +0200
Subject: [PATCH v3 2/4] checkpatch: use a list of "link" tags
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Message-Id: <20230314-doc-checkpatch-closes-tag-v3-2-d1bdcf31c71c@tessares.net>
References: <20230314-doc-checkpatch-closes-tag-v3-0-d1bdcf31c71c@tessares.net>
In-Reply-To: <20230314-doc-checkpatch-closes-tag-v3-0-d1bdcf31c71c@tessares.net>
To:     Jonathan Corbet <corbet@lwn.net>,
        Andy Whitcroft <apw@canonical.com>,
        Joe Perches <joe@perches.com>,
        Dwaipayan Ray <dwaipayanray1@gmail.com>,
        Lukas Bulwahn <lukas.bulwahn@gmail.com>,
        =?utf-8?q?Kai_Wasserb=C3=A4ch?= <kai@dev.carbon-project.org>,
        Thorsten Leemhuis <linux@leemhuis.info>,
        Andrew Morton <akpm@linux-foundation.org>,
        David Airlie <airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>,
        Konstantin Ryabitsev <konstantin@linuxfoundation.org>,
        Bagas Sanjaya <bagasdotme@gmail.com>,
        Linus Torvalds <torvalds@linux-foundation.org>
Cc:     linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
        dri-devel@lists.freedesktop.org, mptcp@lists.linux.dev,
        Matthieu Baerts <matthieu.baerts@tessares.net>
Precedence: bulk

The following commit will allow the use of a similar "link" tag.

Because there is a possibility that other similar tags will be added in
the future and to reduce the number of places where the code will be
modified to allow this new tag, a list with all these "link" tags is now
used.

Two variables are created from it: one to search for such tags and one
to print all tags in a warning message.

Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
---
 scripts/checkpatch.pl | 32 ++++++++++++++++++++++++--------
 1 file changed, 24 insertions(+), 8 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index bd44d12965c9..9d092ff4fc16 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -620,6 +620,22 @@ our $signature_tags = qr{(?xi:
 	Cc:
 )};
 
+our @link_tags = qw(Link);
+
+#Create a search and print patterns for all these strings to be used directly below
+our $link_tags_search = "";
+our $link_tags_print = "";
+foreach my $entry (@link_tags) {
+	if ($link_tags_search ne "") {
+		$link_tags_search .= '|';
+		$link_tags_print .= ' or ';
+	}
+	$entry .= ':';
+	$link_tags_search .= $entry;
+	$link_tags_print .= "'$entry'";
+}
+$link_tags_search = "(?:${link_tags_search})";
+
 our $tracing_logging_tags = qr{(?xi:
 	[=-]*> |
 	<[=-]* |
@@ -3158,14 +3174,14 @@ sub process {
 				}
 			}
 
-# check if Reported-by: is followed by a Link:
+# check if Reported-by: is followed by a link tag
 			if ($sign_off =~ /^reported(?:|-and-tested)-by:$/i) {
 				if (!defined $lines[$linenr]) {
 					WARN("BAD_REPORTED_BY_LINK",
-					     "Reported-by: should be immediately followed by Link: to the report\n" . $herecurr . $rawlines[$linenr] . "\n");
-				} elsif ($rawlines[$linenr] !~ m{^link:\s*https?://}i) {
+					     "Reported-by: should be immediately followed by $link_tags_print to the report\n" . $herecurr . $rawlines[$linenr] . "\n");
+				} elsif ($rawlines[$linenr] !~ m{^$link_tags_search\s*https?://}i) {
 					WARN("BAD_REPORTED_BY_LINK",
-					     "Reported-by: should be immediately followed by Link: with a URL to the report\n" . $herecurr . $rawlines[$linenr] . "\n");
+					     "Reported-by: should be immediately followed by $link_tags_print with a URL to the report\n" . $herecurr . $rawlines[$linenr] . "\n");
 				}
 			}
 		}
@@ -3250,8 +3266,8 @@ sub process {
 					# file delta changes
 		      $line =~ /^\s*(?:[\w\.\-\+]*\/)++[\w\.\-\+]+:/ ||
 					# filename then :
-		      $line =~ /^\s*(?:Fixes:|Link:|$signature_tags)/i ||
-					# A Fixes: or Link: line or signature tag line
+		      $line =~ /^\s*(?:Fixes:|$link_tags_search|$signature_tags)/i ||
+					# A Fixes:, link or signature tag line
 		      $commit_log_possible_stack_dump)) {
 			WARN("COMMIT_LOG_LONG_LINE",
 			     "Possible unwrapped commit description (prefer a maximum 75 chars per line)\n" . $herecurr);
@@ -3266,13 +3282,13 @@ sub process {
 
 # Check for odd tags before a URI/URL
 		if ($in_commit_log &&
-		    $line =~ /^\s*(\w+):\s*http/ && $1 ne 'Link') {
+		    $line =~ /^\s*(\w+:)\s*http/ && $1 !~ /^$link_tags_search$/) {
 			if ($1 =~ /^v(?:ersion)?\d+/i) {
 				WARN("COMMIT_LOG_VERSIONING",
 				     "Patch version information should be after the --- line\n" . $herecurr);
 			} else {
 				WARN("COMMIT_LOG_USE_LINK",
-				     "Unknown link reference '$1:', use 'Link:' instead\n" . $herecurr);
+				     "Unknown link reference '$1', use $link_tags_print instead\n" . $herecurr);
 			}
 		}
 

-- 
2.39.2