[inspector_protocol] Allow overriding specific config values.

CodeGenerator.py

Index: CodeGenerator.py
diff --git a/CodeGenerator.py b/CodeGenerator.py
index 4a0ecbef770eca3e670c9bcb4d80c179ce49192f..38cd846b1b5f0643b4890abffaa0c152263bdd54 100644
--- a/CodeGenerator.py
+++ b/CodeGenerator.py
@@ -52,6 +52,7 @@ def read_config():
         cmdline_parser.add_option("--output_base")
         cmdline_parser.add_option("--jinja_dir")
         cmdline_parser.add_option("--config")
+        cmdline_parser.add_option("--config_value", action="append", type="string")
         arg_options, _ = cmdline_parser.parse_args()
         jinja_dir = arg_options.jinja_dir
         if not jinja_dir:
@@ -63,6 +64,7 @@ def read_config():
         if not config_file:
             raise Exception("Config file name must be specified")
         config_base = os.path.dirname(config_file)
+        config_values = arg_options.config_value
     except Exception:
         # Work with python 2 and 3 http://docs.python.org/py3k/howto/pyporting.html
         exc = sys.exc_info()[1]
@@ -90,6 +92,10 @@ def read_config():
             ".lib.export_macro": "",
             ".lib.export_header": False,
         }
+        for key_value in config_values:
+            parts = key_value.split("=")
+            if len(parts) == 2:
+                defaults["." + parts[0]] = parts[1]
         return (jinja_dir, config_file, init_defaults(config_partial, "", defaults))
     except Exception:
         # Work with python 2 and 3 http://docs.python.org/py3k/howto/pyporting.html