Create a gem and metadata and an rspec test file. Write a trivial failing test and make it pass.

Per #13 , current code fails silently in confusing ways when inkscape is missing. Behavior when lilypond, timidity, etc are missing is untested. Also unclear what will happen when one of these tools does not produce an expected file. Mock system calls to make this testable, and produce informative error messages.

The stuff in the .ly file that isn't part of the tag contents does get included in the hash, so that when the template changes the image gets regenerated.

Unfortunately, when the baseurl: is set (in the _config.yml file), the music doesn't show up in the post and I get the following error in the terminal:

ERROR `/lilypond_files/44d290db15f1c705113158a2385bef75-trimmed.svg' not found.

I tried setting the baseurl to an empty string, i.e. baseurl: "", and the music showed up fine without any errors (locally).

However, it's unfortunately not a satisfactory solution since setting the baseurl to an empty string would in this case cause other links to not work properly.

The link https://www.velleman.org/jekyll-lilypond leads to a 404 not found error; if I add .html to the end of the address, it goes to the right place.

Fail Jekyll build on lilypond failure and pass along lilypond error message

Error due to missing '-trimmed' in .svg file

I installed jekyll-lilypond and tried inserting some sample lilypond code into a markdown file (post), however after running bundle exec jekyll serve, I got the following error:

/usr/local/lib/ruby/gems/3.0.0/gems/jekyll-4.2.0/lib/jekyll/static_file.rb:71:in `stat': No such file or directory @ rb_file_s_stat - /Users/michael/sites/music-template/lilypond_files/fcf5de3d1b7e3729f701ea41da6b1b71-trimmed.svg (Errno::ENOENT)

It turned out that the lilypond_files directory included a file called fcf5de3d1b7e3729f701ea41da6b1b71.svg, but without the '-trimmed'.

Temporary solution/workaround:

After running rename -s '.svg' '-trimmed.svg' *.svg in the lilypond_files directory, everything worked and I could see the rendered music on the page in the browser.

However, Jekyll still gave me the following warning (I'm not quite sure why):

Conflict: The following destination is shared by multiple files.
                    The written file may end up with unexpected contents.
                    /Users/michael/sites/music-template/_site/lilypond_files/fcf5de3d1b7e3729f701ea41da6b1b71-trimmed.svg
                     - /Users/michael/sites/music-template/lilypond_files/fcf5de3d1b7e3729f701ea41da6b1b71-trimmed.svg
                     - /Users/michael/sites/music-template/lilypond_files/fcf5de3d1b7e3729f701ea41da6b1b71-trimmed.svg