[tex-live] Package preparation question (directory structure)

[Karl Berry]

    will have a 'lily-' prefix which is less ugly than lgl- and should
    definitely be sufficient with regard to unique file-names.

Unless there are other Lilypond-related packages (not in TeX) which use
such names ...  That's why the ugly lgl- came to mind.

    Exactly, this is 'import'ed by the other scripts.  I do not see why
    this complicates things,

Because the gen*Command scripts will be in the bin/ directory, but
lilyglyphs_common.py should not be, since it's not meant to be invoked
directly.  PATH directories should not be cluttered with
non-user-level-executables.

So, you have to do something in the user-level scripts so that it can
find the common script.  As far as Python (in TL) goes, I believe you
will be breaking new ground here, sorry to say.  

For TL, the files will installed be like this:

  bin/i386-linux/lgl-genImageCommand [as a symlink, but that's irrelevant here]
  ...
  texmf-dist/scripts/lilyglyphs/lilyglyphs_common.py
  ...

So it's not trivial to locate the common file.  We don't and can't do
anything about PYTHONPATH or anything like that.

I think the most reliable way to find it is by running something like
(sh-ish syntax for example):
com=`kpsewhich --progname=lilyglyphs --format=texmfscripts lilyglyphs_common.py`
And then read in $com.  I don't know how hard or easy that may be in the
Python world.

Hope this helps,
karl