Motivation:
I keep my Lilypond files in a git repository. I would like to
interpolate the repo's version number in the Lilypond output by running
a command like "git log|head -1". I can do this from raw Scheme using
the system() function, but this does not seem to work in Lilypond.
So, now the question:
How do I run a system command from within Lilypond? I realise that being
able to do so opens up a massive security hole, but that is not a
problem here.
There are workarounds, like having a cron job that writes the text into
a file at regular intervals and then including that file. But that is
messy - and not portable to a machine that does not have that cron job.
BTW I run Lilypond from Frescobaldi.
--
In software design, perfection has been reached not when there
is nothing left to add, but when there is nothing left to take
away. - After RFC1925
