set-global-staff-size from inside Scheme function

[Urs Liska]

Hi,

I have been there already, but I can't find the corresponding email, and 
I don't recall if they actually contained a solution or only an 
explanation of the cause of the issue. So I have to start nes.

For the creation of music examples in a book I have written a function 
\compileScore which does a number of things like munging file names, 
cleaning up temporary files and particularly compiling different 
versions of the file.

One particular issue is that it includes appropriate style sheets 
according to the example type (which is expressed as a variable).
The problem is that #(set-global-staff-size) doesn't work in that 
constellation, IISC because it's not a toplevel expression anymore.

The attached files show a very stripped-down version of the stuff and 
will probably not look very useful.

But my question is: How can I set the global staff size from within the 
included file?

Best
Urs

main-file.ly
Description: Text Data

example-styles.ily
Description: Text document