feat: allow to pass multiple extra-arg arguments to clang-tidy

Signed-off-by: WU MENGHUNG <wu.menghung@jp.panasonic.com>

ament_clang_tidy/ament_clang_tidy/main.py

@@ -58,6 +58,8 @@ def main(argv=sys.argv[1:]):
     parser.add_argument(
         '--extra-arg',
         type=str,
+        action='append',
+        dest='extra_arg',
         default=None,
         help='Additional argument to append to the compiler command line')
 
@@ -158,7 +160,8 @@ def invoke_clang_tidy(compilation_db_path):
         if args.system_headers:
             cmd.append('--system-headers')
         if args.extra_arg:
-            cmd.append('--extra-arg=' + args.extra_arg)
+            for arg in args.extra_arg:
+                cmd.append('--extra-arg=' + arg)
 
         def is_gtest_source(file_name):
             if file_name == 'gtest_main.cc' or file_name == 'gtest-all.cc' \