Fixed inconsistency in forwarding params in Context.forward

CHANGES.rst

@@ -203,6 +203,9 @@ Unreleased
     does not raise a ``UnicodeEncodeError``. :issue:`848`
 -   Fix an issue where ``readline`` would clear the entire ``prompt()``
     line instead of only the input when pressing backspace. :issue:`665`
+-   Add all kwargs passed to ``Context.invoke()`` to ``ctx.params``.
+    Fixes an inconsistency when nesting ``Context.forward()`` calls.
+    :issue:`1568`
 
 
 Version 7.1.2

src/click/core.py

@@ -678,6 +678,10 @@ def invoke(*args, **kwargs):  # noqa: B902
         in against the intention of this code and no context was created.  For
         more information about this change and why it was done in a bugfix
         release see :ref:`upgrade-to-3.2`.
+
+        .. versionchanged:: 8.0
+            All ``kwargs`` are tracked in :attr:`params` so they will be
+            passed if :meth:`forward` is called at multiple levels.
         """
         self, callback = args[:2]
         ctx = self
@@ -700,6 +704,10 @@ def invoke(*args, **kwargs):  # noqa: B902
                 if param.name not in kwargs and param.expose_value:
                     kwargs[param.name] = param.get_default(ctx)
 
+            # Track all kwargs as params, so that forward() will pass
+            # them on in subsequent calls.
+            ctx.params.update(kwargs)
+
         args = args[2:]
         with augment_usage_errors(self):
             with ctx:
@@ -709,6 +717,10 @@ def forward(*args, **kwargs):  # noqa: B902
         """Similar to :meth:`invoke` but fills in default keyword
         arguments from the current context if the other command expects
         it.  This cannot invoke callbacks directly, only other commands.
+
+        .. versionchanged:: 8.0
+            All ``kwargs`` are tracked in :attr:`params` so they will be
+            passed if ``forward`` is called at multiple levels.
         """
         self, cmd = args[:2]
 

tests/test_commands.py

@@ -39,6 +39,28 @@ def dist(ctx, count):
     assert result.output == "Count: 1\nCount: 42\n"
 
 
+def test_forwarded_params_consistency(runner):
+    cli = click.Group()
+
+    @cli.command()
+    @click.option("-a")
+    @click.pass_context
+    def first(ctx, **kwargs):
+        click.echo(f"{ctx.params}")
+
+    @cli.command()
+    @click.option("-a")
+    @click.option("-b")
+    @click.pass_context
+    def second(ctx, **kwargs):
+        click.echo(f"{ctx.params}")
+        ctx.forward(first)
+
+    result = runner.invoke(cli, ["second", "-a", "foo", "-b", "bar"])
+    assert not result.exception
+    assert result.output == "{'a': 'foo', 'b': 'bar'}\n{'a': 'foo', 'b': 'bar'}\n"
+
+
 def test_auto_shorthelp(runner):
     @click.group()
     def cli():