Update termui.py

src/click/termui.py

@@ -60,14 +60,16 @@ def hidden_prompt_func(prompt: str) -> str:
 def _build_prompt(
     text: str,
     suffix: str,
-    show_default: bool = False,
+    show_default: bool | str = False,
     default: t.Any | None = None,
     show_choices: bool = True,
     type: ParamType | None = None,
 ) -> str:
     prompt = text
     if type is not None and show_choices and isinstance(type, Choice):
         prompt += f" ({', '.join(map(str, type.choices))})"
+    if isinstance(show_default, str):
+        default = f"({show_default})"
     if default is not None and show_default:
         prompt = f"{prompt} [{_format_default(default)}]"
     return f"{prompt}{suffix}"
@@ -88,7 +90,7 @@ def prompt(
     type: ParamType | t.Any | None = None,
     value_proc: t.Callable[[str], t.Any] | None = None,
     prompt_suffix: str = ": ",
-    show_default: bool = True,
+    show_default: bool | str = True,
     err: bool = False,
     show_choices: bool = True,
 ) -> t.Any:
@@ -112,6 +114,8 @@ def prompt(
                        convert a value.
     :param prompt_suffix: a suffix that should be added to the prompt.
     :param show_default: shows or hides the default value in the prompt.
+                         If this value is a string, it shows that string 
+                         in parentheses instead of the actual value.
     :param err: if set to true the file defaults to ``stderr`` instead of
                 ``stdout``, the same as with echo.
     :param show_choices: Show or hide choices if the passed type is a Choice.