Simplify --version

PFERD/__main__.py

@@ -8,7 +8,6 @@ from .config import Config, ConfigDumpError, ConfigLoadError, ConfigOptionError
 from .logging import log
 from .pferd import Pferd, PferdLoadError
 from .transformer import RuleParseError
-from .version import NAME, VERSION
 
 
 def load_config_parser(args: argparse.Namespace) -> configparser.ConfigParser:
@@ -81,10 +80,6 @@ def dump_config(args: argparse.Namespace, config: Config) -> None:
 def main() -> None:
     args = PARSER.parse_args()
 
-    if args.version:
-        print(f"{NAME} {VERSION}")
-        exit()
-
     # Configuring logging happens in two stages because CLI args have
     # precedence over config file options and loading the config already
     # produces some kinds of log messages (usually only explain()-s).

PFERD/cli/parser.py

@@ -3,6 +3,7 @@ import configparser
 from pathlib import Path
 
 from ..output_dir import OnConflict, Redownload
+from ..version import NAME, VERSION
 
 CRAWLER_PARSER = argparse.ArgumentParser(add_help=False)
 CRAWLER_PARSER_GROUP = CRAWLER_PARSER.add_argument_group(
@@ -70,8 +71,8 @@ PARSER = argparse.ArgumentParser()
 PARSER.set_defaults(command=None)
 PARSER.add_argument(
     "--version",
-    action="store_true",
-    help="print version and exit"
+    action="version",
+    version=f"{NAME} {VERSION}",
 )
 PARSER.add_argument(
     "--config", "-c",