Add models sub command to show info about models.

Simplify settings sub command.

charla/chat.py

@@ -96,9 +96,7 @@ def run(argv: argparse.Namespace) -> None:
     chats_path = Path(argv.chats_path)
     config.mkdir(chats_path, exist_ok=True, parents=True)
     save(chats_path, output, argv.model)
-
     print_fmt(HTML('<b>Exiting program.</b>'))
-    sys.exit()
 
 
 def save(chats_path: Path, output: list[str], model_name: str) -> None:

charla/cli.py

@@ -1,11 +1,19 @@
 #!/usr/bin/env python
 import argparse
+import json
 import sys
 
 from charla import chat, config
 from charla.__about__ import __version__
 
 
+def handle_models(argv):
+    if argv.verbose:
+        print(json.dumps(argv.models, indent=4))
+    else:
+        print('\n'.join(argv.model_names))
+
+
 def main():
     if (models := chat.available_models()) is None:
         sys.exit('No language models available.')
@@ -14,19 +22,25 @@ def main():
     user_settings = config.settings()
     user_settings['model'] = user_settings['model'] or model_names[0]
 
+    parent = argparse.ArgumentParser(add_help=False)
+    parent.add_argument('--verbose', '-v', action='store_true', help='Verbose program output.')
+
     parser = argparse.ArgumentParser(description='Chat with local language models.')
-    parser.add_argument('--model', '-m', nargs=1, choices=model_names, action='store', help='Language model to chat with.')
+    parser.add_argument('--model', '-m', nargs=1, metavar='MODEL', choices=model_names, action='store', help='Name of language model to chat with.')
     parser.add_argument('--chats-path', type=str, help='Directory to store chats.')
     parser.add_argument('--prompt-history', type=str, help='File to store prompt history.')
     parser.add_argument('--version', action='version', version=f'%(prog)s {__version__}')
     parser.set_defaults(**user_settings, func=chat.run)
 
     subparsers = parser.add_subparsers(help='Sub Commands')
-    parser_settings = subparsers.add_parser('settings', help='Manage Charla settings')
-    parser_settings.add_argument('--show', action='store_true', help='Show current settings.')
+
+    parser_settings = subparsers.add_parser('settings', help='Show current settings.')
     parser_settings.add_argument('--location', action='store_true', help='Show location of settings file.')
     parser_settings.set_defaults(func=config.manage)
 
+    parser_models = subparsers.add_parser('models', parents=[parent], help='Show available models.')
+    parser_models.set_defaults(func=handle_models, models=models, model_names=model_names)
+
     argv = parser.parse_args()
 
     # Make sure model is installed

charla/config.py

@@ -40,9 +40,8 @@ def settings() -> dict[str, str]:
 
 
 def manage(argv: argparse.Namespace) -> None:
-    if argv.show:
-        user_settings = {k: v for k, v in vars(argv).items() if k in default_settings}
-        print(json.dumps(user_settings, indent=4))
     if argv.location:
         print(path_settings)
-    sys.exit()
+    else:
+        user_settings = {k: v for k, v in vars(argv).items() if k in default_settings}
+        print(json.dumps(user_settings, indent=4))