Re: Syntax error encountered while engraving a successfully updated Mutopia ly file

[David Kastrup]

Aaron Hill <lilypond@hillvisions.com> writes:

> convert-ly knows how to fix this:
>
> %%%%
>   \override Thing #'property #'sub-property = #'value
> % ...to...
>   \override Thing.property.sub-property = #'value
> %%%%
>
> It does not however seem to correct:
>
> %%%%
>   variable #'key = #'value
> % ...to...
>   variable.key = #'value
> %%%%

commit 10df1245877fb5e16410388ef42b71c9aa06a9d9
Author: David Kastrup <dak@gnu.org>
Date:   Mon Mar 30 00:49:14 2020 +0200

    Issue 5872: convert-ly rule for 2.19.39 as cleanup for issue 4800
    
    That issue made previously valid and promoted code invalid without
    proper replacement.
    
    Property assignments of the form
    
    staffgroup-staff-spacing #'basic-distance = #15
    
    are converted to
    
    staffgroup-staff-spacing.basic-distance = #15
    
    for various paper or layout spacing variables.


The problem is that this convert-ly rule was done rather late and so you
need at least convert-ly from 2.21.0 to get this right.  So if you used
an older convert-ly for getting your version across 2.19.39, this
convert-ly fix will no longer get applied.

The good news should be that the given score should work in 2.21.x+
again assuming that you convert it all the way from its ancient version
with the new convert-ly.

Of course it would also work in 2.20 if you use the latest convert-ly to
go just up to 2.20.  But who does that?

-- 
David Kastrup