fix: variable arg handling

arger/parser/actions.py

@@ -15,7 +15,12 @@
 
 def get_nargs(typ: Any) -> Tuple[Any, Union[int, str]]:
     inner = unpack_type(typ)
-    if is_tuple(typ) and get_inner_args(typ):
+    if (
+        is_tuple(typ)
+        and typ != tuple
+        and not isinstance(typ, (VarKw, VarArg))
+        and get_inner_args(typ)
+    ):
         args = get_inner_args(typ)
         inner = inner if len(set(args)) == 1 else str
         return inner, '+' if (... in args) else len(args)
@@ -30,7 +35,7 @@ def __init__(self, *args, **kwargs):
         self.orig_type = typ
         if typ is not UNDEFINED:
             origin = get_origin(typ)
-            if is_iterable(origin) or isinstance(typ, (VarArg, VarKw)):
+            if is_iterable(origin):
                 origin, kwargs["nargs"] = get_nargs(typ)
 
             if is_enum(origin):

arger/parser/funcs.py

@@ -27,12 +27,14 @@ def get_param(param):
 def create_option(param: Param, default, option_generator):
     if isinstance(default, Argument):
         option = default
-        default.update_flags(param.name)
-        default.update(param.type)
+        option.update_flags(param.name)
+        if 'type' not in option.kwargs:
+            option.update(param.type)
     elif isinstance(default, Option):
         option = default
         option.update_flags(param.name, option_generator)
-        option.update(param.type)
+        if 'type' not in option.kwargs:
+            option.update(param.type)
     else:
         option = Option(help=param.help)
         option.update_flags(param.name, option_generator)

arger/types.py

@@ -14,7 +14,7 @@ class VarArg:
     __args__ = ()
 
     def __init__(self, tp):
-        self.__args__ = (tp,)
+        self.__args__ = (tp, ...)
 
     def __repr__(self):
         tp = self.__args__[0]

tests/conftest.py

@@ -58,6 +58,6 @@ def pytest_generate_tests(metafunc):
             cmds.pop(0)
             cmds.pop(0)
             cmds.insert(0, py_file.name)
-            idlist.append("-".join(cmds))
+            idlist.append("-".join(cmds).replace('.', ''))
             argvalues.append((py_file, cmd, output))
         metafunc.parametrize("pyfile, cmd, expected", argvalues, ids=idlist)