building a DIY Lilypond engraving server

[Kieren MacMillan]

Hey y'all,

I've got a long-term Lilypond-related project I'm interested in  
working on, and I wanted to brainstorm a bit...

I'm planning to publish all my music using Lilypond... of course!  ;-)

And for the most part, I will be personally making all the engraving  
choices (ahead of time), generating the appropriate PDFs, and making  
them available as "static documents" -- the standard publishing  
workflow.

However, for my (Broadway-style) musicals, I'm hoping to allow the  
"consumers" to make certain choices and have Lilypond "dynamically"  
generate them the scores/parts/etc. Specifically, the customer should  
be able to accomplish as many as possible/feasible of the following:

    1. Specify transpositions (on a per-song or even per section  
basis).
    2. Make cuts (i.e., omit sections of the music).
    3. Add/remove/modify repeats (e.g., "In Song #1, make mm. 22-24  
a vamp").
    4. Force page turns.
    5. Choose cue setups (e.g., "Reed 4 music: Song #1 goes into the  
synth part; Song #2 into the Reed 3 part; ...").

I'm sure there are other potential/desirable mods I'm not thinking of  
right now, but that's a good place to start this thread...

What I'm looking for are some "best practices" for how this might be  
set up -- first from a technological standpoint (e.g., how to  
configure such a server), and second from a Lily-code standpoint  
(e.g., how to write code that would allow "in-line" modifications of  
the volta structures).

Like I said, this is a *long-term* thought, so there's no rush... but  
if anyone has any bright ideas, I'd love to hear them!  =)

Best wishes,
Kieren.