Thank you Dan and Jean. I'll do some experiments in the next few days and I'll update you.
On Tue, Nov 15, 2022 at 2:39 AM Dan Eble <dan@lyric.works> wrote: > On Nov 14, 2022, at 04:43, Paolo Prete <paolopr...@gmail.com> wrote: > > > > I need to execute the following automated test: > > given a .ly file, I would like to check if the produced output is what I > > expect it to be. > > For checking the impact of LilyPond changes on my own scores, I use a > Docker container and a bash script that does this: > > 1. reads PDF files from two directories recursively > 2. converts each page to a bitmap > 3. overlays the two versions of each page so that pixels which are white > in one and black in the other become either red or green > 4. collates the new images into new PDF files in a third directory > > Then I review every score. > > It works well when specific things have moved, appeared, or disappeared. > It can be quite noisy when there have been general changes to spacing. > > If that appeals to you, I can send you the scripts privately. > — > Dan > >
