[NTG-context] differences of perl/ruby texexec

[Henning Hraban Ramm]

Ahoi!

While processing my LilyPond/ConTeXt songbook, I experience still the  
same behaviour as in 2006-10:

The checking, if a LilyPond buffer/temp file has changed, works only  
with the old Perl texexec, the recent Ruby version creates/processes  
the files only if they're missing completely and then still  
uncomplete: after 20-some songs, some buffers get dropped, so that  
LilyPond score and ConTeXt lyrics don't match.

But I can't simply use the Perl texexec, because that doesn't create  
table of contents and references. Besides being much slower.

Looks like the workaround of first Perl, then Ruby gives the expected  
result, but it's an annoyance.

Maybe it's only a problem of the LilyPond module, but I guess the  
filechange check is somehow broken in the Ruby version.

What details should I provide to track the problem down?

Greetlings from Lake Constance!
Hraban
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http://www.fiee.net/texnique/
http://wiki.contextgarden.net
https://www.cacert.org (I'm an assurer)