Patrick Steinhardt <ps@xxxxxx> writes: > On Tue, Jun 04, 2024 at 12:49:35AM +0200, Rubén Justo wrote: >> If either `--interdiff` or `--range-diff` is specified without >> `--cover-letter`, we'll abort if it would result in a multi-patch series >> being generated. Because the cover-letter is needed to give the diff >> text in a multi-patch series. >> >> Considering that `format-patch` generates a multi-patch as needed, let's >> adopt a similar "cover as necessary" approach when using `--interdiff` >> or `--range-diff`. > > What does git-format-patch(1) do right now in this situation? > > In any case, this change should probably have a test or two to > demonstrate that it works as advertised. Yes. I think the existing tests for giving --interdiff to a single patch series serves as the "it does not trigger when it shouldn't" side of the test, so a positive "it does what it claims to do" test should be sufficient. Thanks.