Add --clang-format-version option

ament_clang_format/ament_clang_format/main.py

@@ -47,6 +47,9 @@ def main(argv=sys.argv[1:]):
         help='The files or directories to check. For directories files ending '
              'in %s will be considered.' %
              ', '.join(["'.%s'" % e for e in extensions]))
+    parser.add_argument(
+        '--clang-format-version',
+        help='The version of clang-format to use.')
     parser.add_argument(
         '--reformat',
         action='store_true',
@@ -80,6 +83,10 @@ def main(argv=sys.argv[1:]):
         'clang-format-3.4',
         'clang-format-3.3',
     ]
+
+    if args.clang_format_version:
+        bin_names = ['clang-format-' + args.clang_format_version]
+
     clang_format_bin = find_executable(bin_names)
     if not clang_format_bin:
         print('Could not find %s executable' %

ament_clang_format/doc/index.rst

@@ -12,10 +12,23 @@ How to run the check from the command line?
 
 .. code:: sh
 
-    ament_clang_format [<path> ...]
+    ament_clang_format [-h] [--config path]
+                       [--clang-format-version CLANG_FORMAT_VERSION]
+                       [--reformat] [--xunit-file XUNIT_FILE]
+                       [paths [paths ...]]
+
+``paths`` are directories to recursively search for files to run clang-format
+on.  If no ``paths`` option is set the current directory will be used.
+
+The ``--config`` allows you to set the path to the .clang-format file to use.
+
+The ``--clang-format-version`` enables you to set a different version of
+clang-format to use.
 
 When using the option ``--reformat`` the proposed changes are applied in place.
 
+The ``--xunit-file`` option is used to generate a xunit output file.
+
 
 How to run the check from within a CMake ament package as part of the tests?
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