How to make a lilypond snippet fully justified (according to surrounding text)?

Question

My issue

I have a lilypond snippet (i.e. some music staffs) embedded within a document containing text.

My question: How to make the snippet justified, i.e. that its size matches the \textwidth?

In other terms, how to make the blue lines match the red ones in following example:

My trials

Of course, I am not using the quote option of \lilypondfile. A similar question is reported in the lilypond mailing list, but the solution is to manually adjust the line-width that is imho not satisfactory.

I tried \lilypondfile[line-width=\linewidth] (and with \textwidth). I tried also to print the value of \linewidth ( i.e. to have in the .lytex document following line: \lipsum[1] \the\linewidth) and then report the value into the line-width option. But each time, the blue and red lines are still not matching.

---

MWE

The related MWE is:

• lytex file

  \documentclass{scrartcl}
  
      \usepackage{lipsum}
  
  \begin{document}
  
      \lipsum[1]
      \lilypondfile[noindent]{myFile.ly}        
      \lipsum[2]
  
  \end{document}
  

• The related myFile.ly

  \version "2.18.2"
  
  \paper {
    left-margin = 0
    indent = 0
  }
  
  %% MUSIQUE %%
  melodieRepeat =
      {
          \once \override Score.RehearsalMark.font-size = #2
          \override Score.BarNumber.break-visibility = ##(#f #f #f)
               r4 e'8 e' e' e' f' g'
               g' g' r g' g' g' f' e'
               c'4 r16 c' c' c' c'8 c' d' e'
               g' g' r4 r8 c'' a' f'
      }
  
  %% PAROLES %%
  
  mylyrics = 
      \lyricmode{
              Vers les Hom -- mes sans lu  --  | miè --  re, Al --  lez por -- ter la | paix, Et cette a -- mi -- tié qui é -- | 
              clair -- e, Por -- tez l'a -- 
      }
  
  %% PARTITION %%
  \score {
      \layout {
      indent = #0
      }
      \new ChoirStaff
      <<
          \new Voice = "melodie"
              <<
              \key c \major
              \time 4/4
              \clef treble
              \melodieRepeat
              >>
          \new Lyrics \lyricsto "melodie" {
              \mylyrics 
          }
      >>
  }
  

• Compiling workflow

  I'm following this workflow.

Answer 1

It appears that lilypond-book explicitly adds a little bit of padding around examples (4mm at the moment), and lilypond adds it's own padding on the left-hand side for braces and line numbers. If you know that you won't be using braces, line numbers, or anything else to the left of the staff, you can try this (kind of hacky) solution.

In the preamble to your lytex document add the following:

\def\preLilyPondExample{\hspace*{-3mm}}
\newcommand{\betweenLilyPondSystem}[1]{\linebreak\hspace*{-3mm}}

and in the \paper block in myFile.ly add the line

line-width = #(+ line-width (* mm 4))

Like I said, this feels pretty hacky, but I think it gets pretty close to your desired appearance.