Allow CLI output to a new path

pytest/test_cli.py

@@ -0,0 +1,17 @@
+from click.testing import CliRunner
+
+from uncompyle6.bin import uncompile
+
+
+def test_output_option_accepts_new_file(tmp_path, monkeypatch):
+    input_path = tmp_path / "input.pyc"
+    output_path = tmp_path / "new-output.py"
+    input_path.write_bytes(b"")
+
+    monkeypatch.setattr(uncompile, "main", lambda *args, **kwargs: (0, 0, 0, 0))
+    result = CliRunner().invoke(
+        uncompile.main_bin,
+        ["--output", str(output_path), str(input_path)],
+    )
+
+    assert result.exit_code == 0

uncompyle6/bin/uncompile.py

@@ -120,7 +120,7 @@ def usage():
     "-o",
     "outfile",
     type=click.Path(
-        exists=True, file_okay=True, dir_okay=True, writable=True, resolve_path=True
+        exists=False, file_okay=True, dir_okay=True, writable=True, resolve_path=True
     ),
     required=False,
 )