Enable settings the parser without bucket nor collection parameters.

For xml2kinto and kinto2xml we need to define multiple bucket/collection couples.

r=@magopian

kinto_client/cli_utils.py

@@ -37,6 +37,8 @@ def set_parser_server_options(parser=None,
                               default_auth=None,
                               default_bucket=None,
                               default_collection=None,
+                              bucket=True,
+                              collection=True,
                               **kwargs):
 
     if parser is None:
@@ -50,13 +52,15 @@ def set_parser_server_options(parser=None,
                         help='BasicAuth token:my-secret',
                         type=str, default=default_auth, action=AuthAction)
 
-    parser.add_argument('-b', '--bucket',
-                        help='Bucket name.',
-                        type=str, default=default_bucket)
+    if bucket:
+        parser.add_argument('-b', '--bucket',
+                            help='Bucket name.',
+                            type=str, default=default_bucket)
 
-    parser.add_argument('-c', '--collection',
-                        help='Collection name.',
-                        type=str, default=default_collection)
+    if collection:
+        parser.add_argument('-c', '--collection',
+                            help='Collection name.',
+                            type=str, default=default_collection)
 
     # Defaults
     parser.add_argument('-v', '--verbose', action='store_const',

kinto_client/tests/test_cli_utils.py

@@ -38,6 +38,20 @@ def test_set_parser_server_options_adds_arguments_on_existing_parser(self):
                                    *ALL_PARAMETERS)
         assert len(parser._actions) == 9
 
+    def test_set_parser_server_options_can_ignore_bucket_and_collection(self):
+        parser = cli_utils.set_parser_server_options(
+            bucket=None, collection=None)
+        parameters = [
+            ['-h', '--help'],
+            ['-s', '--server'],
+            ['-a', '--auth'],
+            ['-v', '--verbose'],
+            ['-q', '--quiet'],
+            ['-D', '--debug'],
+        ]
+        self.assert_option_strings(parser, *parameters)
+        assert len(parser._actions) == 6
+
     def test_can_change_default_values(self):
         parser = cli_utils.set_parser_server_options(
             default_server="https://firefox.settings.services.mozilla.com/",