Include PDF snippet from Lilypond to the song environment

[tappoz]

I am trying to include some minimal music score into the \begin{song} ... \end{song} environment. The idea is to provide at the top of the song lyric (with chords) some basic melodies for nursery rhymes e.g. "Old MacDonald has a farm".

I went with a basic Lilypond file just to try something out with the simplest melody.

I have ly/sample.ly with:

% command `lilypond --version`
\version "2.20.0"
{
  c' e' g' e'
}

Then I invoke the following command to generate sample.pdf:

cd $(PWD)/songs/ly && \
    lilypond --pdf --pspdfopt=TeX sample.ly

Then in nursery-rhymes-old-macdonald-had-a-farm.tex inside \begin{song} ... \end{song} I have:

\begin{figure}[htpb]
    \centering
    \includegraphics[width=0.8\textwidth]{ly/sample.pdf}
    \caption{The score for the main melody}
    \label{fig:sample-score}
\end{figure}

But this leads to the error ! LaTeX Error: Not in outer par mode. that I am not able to troubleshoot.

I have to say that I come from an endless list of various attempts, some of the bumps are related to the issues with the command lilypond-book not expanding LaTeX code from this leadsheets library like \includeleadsheet[gobble-preamble=false]{songs/nursery-rhymes-old-macdonald-had-a-farm.tex}.

Is this kind of flow possible at all within leadsheets?

[cgnieder]

without testing it my first guess is that the float is the problem here.

Does

% \begin{figure}[htpb]
%    \centering
    \includegraphics[width=0.8\textwidth]{ly/sample.pdf}
%     \caption{The score for the main melody}
%     \label{fig:sample-score}
% \end{figure}

work? If yes, I suggest to drop the float and just use a center environment. Together with the caption package that would look something like

\begin{center}
    \includegraphics[width=0.8\textwidth]{ly/sample.pdf}
    \captionof{figure}{The score for the main melody}
    \label{fig:sample-score}
\end{center}

[tappoz]

The float might be the reason, in fact now I just use \includegraphics, however I didn't manage to get something working with lilipond-book.

I found out this LaTeX/Lua package \usepackage[program=/usr/bin/lilypond]{lyluatex}.

I basically write lots of dummy .tex files to include just the Lilypond file e.g.

\documentclass{scrartcl}

% `which lilypond`
\usepackage[program=/usr/bin/lilypond]{lyluatex}

\begin{document}
\lilypondfile[staffsize=17]{old-macdonald-had-a-farm.ly}
\end{document}

I then just throw these files away, they help generating the PDF snippet I need (see below).

This generates a folder tmp-ly where I find a small PDF sample with a filename based on a UUID e.g. 34ca8fd9fddd6b0a8a58f64bb8b5786c-1.pdf. I cannot force this to have a name of my choice, it looks like an hash-code of whatever I write inside the .ly file.

I just need to react to whatever is produced in that folder and then do: \includegraphics[width=130mm]{songs/ly/tmp-ly/34ca8fd9fddd6b0a8a58f64bb8b5786c-1} inside the leadsheets environment \begin{song} ... \end{song}.

Now: I doubt leadsheets was a problem at all, I am not super familiar with LaTeX so I might be missing some obvious context here. Anyway: I got something kind of working with a minimum acceptable automation.

It would be good to combine leadsheets with Lilypond and perhaps guitar/ukulele chord diagrams. This would lead to very useful songbooks.