Hide default value when show_default is False

CHANGES.rst

@@ -7,6 +7,7 @@ Unreleased
 
 -   Use modern packaging metadata with ``pyproject.toml`` instead of ``setup.cfg``.
     :pr:`326`
+-   Do not display values in prompts when `show_default=False` on Options
 
 
 Version 8.1.4

src/click/core.py

@@ -2865,6 +2865,7 @@ def prompt_for_value(self, ctx: Context) -> t.Any:
             show_choices=self.show_choices,
             confirmation_prompt=self.confirmation_prompt,
             value_proc=lambda x: self.process_value(ctx, x),
+            show_default=(False if self.show_default is False else True),
         )
 
     def resolve_envvar_value(self, ctx: Context) -> t.Optional[str]:

tests/test_termui.py

@@ -446,3 +446,14 @@ def cli(password):
 
     if prompt == "Confirm Password":
         assert "Confirm Password: " in result.output
+
+
+def test_false_show_default_cause_no_default_display_in_prompt(runner):
+    @click.command()
+    @click.option("--arg1", show_default=False, prompt=True, default="my-default-value")
+    def cmd(arg1):
+        pass
+
+    # Confirm that the default value is not included in the output when `show_default` is False
+    result = runner.invoke(cmd, input="my-input", standalone_mode=False)
+    assert "my-default-value" not in result.output