Update user permission check for --help (archlinux#2568)

* Update user permission check for --help

* Fix code style

* Fix code style

* Fix docstring

* Fix newline

* Fix newline

* Fix argument error

* Fix formatting

archinstall/__init__.py

@@ -60,10 +60,6 @@
 # For support reasons, we'll log the disk layout pre installation to match against post-installation layout
 debug(f"Disk states before installing: {disk.disk_layouts()}")
 
-if 'sphinx' not in sys.modules and os.getuid() != 0:
-	print(_("Archinstall requires root privileges to run. See --help for more."))
-	exit(1)
-
 parser = ArgumentParser()
 
 
@@ -96,6 +92,16 @@ def define_arguments():
 						help="Skip the version check when running archinstall")
 
 
+if 'sphinx' not in sys.modules:
+	if '--help' in sys.argv or '-h' in sys.argv:
+		define_arguments()
+		parser.print_help()
+		exit(0)
+	if os.getuid() != 0:
+		print(_("Archinstall requires root privileges to run. See --help for more."))
+		exit(1)
+
+
 def parse_unspecified_argument_list(unknowns: list, multiple: bool = False, err: bool = False) -> dict:
 	"""We accept arguments not defined to the parser. (arguments "ad hoc").
 	Internally argparse return to us a list of words so we have to parse its contents, manually.