I've mentioned before that I (a) don't read music, and (b) am pretty much a beginner with LilyPond.
Before I make TOO many mistakes, and make a royal mess of things, I thought I'd offer up the three wee songs I've entered thus far. The sources: https://codeberg.org/ubuntourist/celtic_song_book/src/branch/main/source/song_of_the_heather.ly https://codeberg.org/ubuntourist/celtic_song_book/src/branch/main/source/irish/erin_tear_smile.ly https://codeberg.org/ubuntourist/celtic_song_book/src/branch/main/source/irish/go_where_glory_waits_thee.ly Resulting in: https://ubuntourist.codeberg.page/Celtic_Song_Book/song_of_the_heather.html https://ubuntourist.codeberg.page/Celtic_Song_Book/irish/erin_tear_smile.html https://ubuntourist.codeberg.page/Celtic_Song_Book/irish/go_where_glory_waits_thee.html Both the sources and the HTML pages have URLs linking back to the corresponding pages in the PDF I put up on the Internet Archive. The LilyPond sources have the URL at the top of the files, and the HTML pages have a link at the bottom of each page. I'm really only concerned here with how to better grok LilyPond. P.S. The Sphinx LilyPond extension, at the moment, doesn't handle repeats in the audio playback bars beneath the scores. Nothing I can do about that at the moment. Also, the Preface to the Online Edition, in addition to offering up my completely unqualified critique and opinions, provides links to the tools used, etc. (Don't worry about the long section introductions. I've roped milady into proofreading those, and she has a VERY critical eye for such things.)