Fix boolean env vars and cli arguments

llama_cpp/server/__main__.py

@@ -51,6 +51,21 @@ def contains_list_type(annotation) -> bool:
     else:
         return False
 
+def parse_bool_arg(arg):
+    if isinstance(arg, bytes):
+        arg = arg.decode('utf-8')
+
+    true_values = {'1', 'on', 't', 'true', 'y', 'yes'}
+    false_values = {'0', 'off', 'f', 'false', 'n', 'no'}
+
+    arg_str = str(arg).lower().strip()
+    
+    if arg_str in true_values:
+        return True
+    elif arg_str in false_values:
+        return False
+    else:
+        raise ValueError(f'Invalid boolean argument: {arg}')
 
 if __name__ == "__main__":
     parser = argparse.ArgumentParser()
@@ -72,16 +87,8 @@ if __name__ == "__main__":
             parser.add_argument(
                 f"--{name}",
                 dest=name,
-                action="store_true",
+                type=parse_bool_arg,
                 help=f"Disable {description}",
-                default=field.default,
-            )
-            parser.add_argument(
-                f"--no-{name}",
-                dest=name,
-                action="store_false",
-                help=f"Disable {description}",
-                default=field.default,
             )
 
     args = parser.parse_args()