Extracted island argument parsing into a separate file

monkey/monkey_island.py

@@ -1,5 +1,7 @@
 from gevent import monkey as gevent_monkey
 
+from monkey_island.cc.arg_parser import parse_cli_args
+
 gevent_monkey.patch_all()
 
 import json  # noqa: E402
@@ -11,51 +13,17 @@ from monkey_island.cc.consts import (
 from monkey_island.cc.island_logger import json_setup_logging  # noqa: E402
 
 
-def parse_cli_args():
-    import argparse
-
-    parser = argparse.ArgumentParser(
-        description="Infection Monkey Island CnC Server.  See https://infectionmonkey.com",
-        formatter_class=argparse.ArgumentDefaultsHelpFormatter,
-    )
-    parser.add_argument(
-        "-s",
-        "--setup-only",
-        action="store_true",
-        help="Pass this flag to cause the Island to setup and exit without actually starting. "
-        "This is useful for preparing Island to boot faster later-on, so for "
-        "compiling/packaging Islands.",
-    )
-    parser.add_argument(
-        "--server-config",
-        action="store",
-        help="The path to the server configuration file.",
-        default=DEFAULT_SERVER_CONFIG_PATH,
-    )
-    parser.add_argument(
-        "--logger-config",
-        action="store",
-        help="The path to the logging configuration file.",
-        default=DEFAULT_LOGGER_CONFIG_PATH,
-    )
-    args = parser.parse_args()
-
-    return (args.setup_only, args.server_config, args.logger_config)
-
-
 if "__main__" == __name__:
-    # TODO: Address https://github.com/guardicore/monkey/pull/963#discussion_r575022748
-    # before merging appimage PR
-    (is_setup_only, server_config, logger_config) = parse_cli_args()
+    island_args = parse_cli_args()
 
     # This is here in order to catch EVERYTHING, some functions are being called on
     # imports, so the log init needs to be first.
     try:
-        json_setup_logging(logger_config)
-    except (json.JSONDecodeError) as ex:
+        json_setup_logging(island_args.logger_config)
+    except json.JSONDecodeError as ex:
         print(f"Error loading logging config: {ex}")
         exit(1)
 
     from monkey_island.cc.main import main  # noqa: E402
 
-    main(is_setup_only, server_config)
+    main(island_args.setup_only, island_args.server_config)

monkey/monkey_island/cc/arg_parser.py

@@ -0,0 +1,42 @@
+from dataclasses import dataclass
+
+from monkey_island.cc.consts import DEFAULT_SERVER_CONFIG_PATH, DEFAULT_LOGGER_CONFIG_PATH
+
+
+@dataclass
+class IslandArgs:
+    setup_only: bool
+    server_config: str
+    logger_config: str
+
+
+def parse_cli_args() -> IslandArgs:
+    import argparse
+
+    parser = argparse.ArgumentParser(
+        description="Infection Monkey Island CnC Server.  See https://infectionmonkey.com",
+        formatter_class=argparse.ArgumentDefaultsHelpFormatter
+    )
+    parser.add_argument(
+        "-s",
+        "--setup-only",
+        action="store_true",
+        help="Pass this flag to cause the Island to setup and exit without actually starting. "
+        "This is useful for preparing Island to boot faster later-on, so for "
+        "compiling/packaging Islands.",
+    )
+    parser.add_argument(
+        "--server-config",
+        action="store",
+        help="The path to the server configuration file.",
+        default=DEFAULT_SERVER_CONFIG_PATH,
+    )
+    parser.add_argument(
+        "--logger-config",
+        action="store",
+        help="The path to the logging configuration file.",
+        default=DEFAULT_LOGGER_CONFIG_PATH,
+    )
+    args = parser.parse_args()
+
+    return IslandArgs(args.setup_only, args.server_config, args.logger_config)