\include in scheme functions

[Pierre-Yves Saumont]

Hi,

The Lilypond documentation says that any lilypond code can be use in a Scheme function by enclosing it in a #{ ...  #} block, but it seems \include doesn't work in this case.

I am building a program to handle multiple Big Band scores. I need to extract parts for each instrument (16 to 22) and for all titles in a given program (10 - 15).

At this time, here is what I do:

\include "../Doxy/Doxy_music.ly"
\include "partAltoI.ly"
\include "../Alfie/Alfie_music.ly"
\include "partAltoI.ly"
\include "../CestSiBon/CestSiBon_music.ly"
\include "partAltoI.ly"
\include "../BeyondTheSea/BeyondTheSea_music.ly"
\include "partAltoI.ly"
\include "../CloseToYou/CloseToYou_music.ly"
\include "partAltoI.ly"

.

.

.

include "../Doxy/Doxy_music.ly"
\include "partAltoII.ly"
\include "../Alfie/Alfie_music.ly"
\include "partAltoII.ly"
\include "../CestSiBon/CestSiBon_music.ly"
\include "partAltoII.ly"
\include "../BeyondTheSea/BeyondTheSea_music.ly"
\include "partAltoII.ly"
\include "../CloseToYou/CloseToYou_music.ly"
\include "partAltoII.ly"

.

.

.

include "../Doxy/Doxy_music.ly"
\include "partTenorI.ly"
\include "../Alfie/Alfie_music.ly"
\include "partTenorI.ly"
\include "../CestSiBon/CestSiBon_music.ly"
\include "partTenorI.ly"
\include "../BeyondTheSea/BeyondTheSea_music.ly"
\include "partTenorI.ly"
\include "../CloseToYou/CloseToYou_music.ly"
\include "partTenorI.ly"

.

.

.

This is tedious, and I would like to be able to simply have to enter the list of titles:

Doxy

Alfie

CestSiBon

BeyondTheSea

CloseToYou

.

.

.

and the list of instruments:

AltoI

AltoII

TenorI

TenorII

Baritone

.

.

.

The result should be a series of PDF files, one for each instrument, containing the specific parts for all selected tunes.

I tried to write a function such as:

part = #(define-void-function (score instrument) (string? string?)
   #{
     \include "../Doxy/Doxy_music.ly"
     \include "partAltoI.ly"
   #})

(Here, I am not constructing the file names from the arguments, only testing the use of \include in the function.

This doesn't work, producing the following error:

.../include/LilyJAZZwithBarNums.ily:62:1: error: syntax error, unexpected SCM_TOKEN, expecting end of input

#(define jazz-map '(

/tmp/frescobaldi-1mgd5_wr/tmpys2kq_gz/March2022_parts_alto1.ly:13:1: error: error in #{ ... #}

\part "Doxy" "AltoI"

The message says the error is in LilyJAZZwithBarNums.ily, but since the same instructions work when not in a function, I presume it's not related to this file.

Is there a way to make this work, or is there another way to achieve the intended result? For example, is there a way to read a lilypond variable from a file without including the whole file?

Thanks for any advice!