checkpatch: add option for excluding directories

.checkpatch.conf

@@ -27,3 +27,13 @@
 --ignore SWITCH_CASE_INDENT_LEVEL
 --ignore TRACING_LOGGING
 --ignore VOLATILE
+
+# ESPRESSIF
+--no-signoff
+--ignore COMMIT_MESSAGE
+--ignore UNKNOWN_COMMIT_ID
+--exclude src/jtag/drivers/libjaylink
+--exclude tools/git2cl
+--exclude .gitlab
+--exclude HACKING
+--exclude testing/esp

tools/checkpatch-esp.sh

@@ -1,13 +1,5 @@
 #!/bin/sh
 # SPDX-License-Identifier: GPL-2.0-or-later
 
-cnt=$(git rev-list --count HEAD ^origin/master)
-git diff HEAD~${cnt} \
-            | filterdiff \
-                -x "a/src/jtag/drivers/libjaylink/*" \
-                -x "a/tools/git2cl/*" \
-                -x "a/.gitlab/*" \
-                -x "a/HACKING" \
-                -x "a/testing/esp/*" \
-            | ./tools/scripts/checkpatch.pl --no-signoff \
-            --ignore FUNCTION_ARGUMENTS --ignore CAMELCASE --ignore LONG_LINE_STRING
+since=${1:-origin/master}
+tools/scripts/checkpatch.pl --git ${since}..

tools/scripts/checkpatch.pl

@@ -67,6 +67,7 @@
 my @use = ();
 my %ignore_type = ();
 my @ignore = ();
+my @exclude = ();
 my $help = 0;
 my $configuration_file = ".checkpatch.conf";
 my $max_line_length = 100;
@@ -123,6 +124,7 @@ sub help {
   --list-types               list the possible message types
   --types TYPE(,TYPE2...)    show only these comma separated message types
   --ignore TYPE(,TYPE2...)   ignore various comma separated message types
+  --exclude DIR(,DIR2...)    exclude directories
   --show-types               show the specific message type in the output
   --max-line-length=n        set the maximum line length, (default $max_line_length)
                              if exceeded, warn on patches
@@ -320,6 +322,7 @@ sub load_docs {
 	'subjective!'	=> \$check,
 	'strict!'	=> \$check,
 	'ignore=s'	=> \@ignore,
+	'exclude=s'	=> \@exclude,
 	'types=s'	=> \@use,
 	'show-types!'	=> \$show_types,
 	'list-types!'	=> \$list_types,
@@ -2930,6 +2933,16 @@ sub process {
 			$found_file = 1;
 		}
 
+		my $excluded = 0;
+		foreach (@exclude) {
+			if ($realfile =~ m@^(?:$_/)@) {
+				$excluded = 1;
+			}
+		}
+		if ($excluded) {
+			next;
+		}
+
 #make up the handle for any error we report on this line
 		if ($showfile) {
 			$prefix = "$realfile:$realline: "