added --dry-run flag (#570)

* added --dry-run flag

archinstall/__init__.py

@@ -32,7 +32,9 @@ def initialize_arguments():
 	parser.add_argument("--config", nargs="?", help="JSON configuration file or URL")
 	parser.add_argument("--creds", nargs="?", help="JSON credentials configuration file")
 	parser.add_argument("--silent", action="store_true",
-						help="Warning!!! No prompts, ignored if config is not passed")
+						help="WARNING: Disables all prompts for input and confirmation. If no configuration is provided, this is ignored")
+	parser.add_argument("--dry-run", action="store_true",
+						help="Generates a configuration file and then exits instead of performing an installation")
 	parser.add_argument("--script", default="guided", nargs="?", help="Script to run for installation", type=str)
 	args, unknowns = parser.parse_known_args()
 	if args.config is not None:
@@ -61,6 +63,8 @@ def initialize_arguments():
 				key, val = arg[2:], True
 			config[key] = val
 	config["script"] = args.script
+	if args.dry_run is not None:
+		config["dry_run"] = args.dry_run
 	return config
 
 

examples/guided.py

@@ -270,7 +270,10 @@ def perform_installation_steps():
 	with open("/var/log/archinstall/user_configuration.json", "w") as config_file:
 		config_file.write(user_configuration)
 	print()
-
+	
+	if archinstall.arguments.get('dry_run'):
+		exit(0)
+	
 	if not archinstall.arguments.get('silent'):
 		input('Press Enter to continue.')