etags regex for Lilypond & LY_DEFINE* tags

[John Wheeler]

To facilitate using emacs xref in lilypond work, I wrote a script to 
assemble the needed TAGS file.  The unique feature of the script is that 
it includes the regex to find tags in Lilypond (.ly) files as well as 
tags defined in LY_DEFINE*  macros, in addition to the normal c++, 
python, lisp, scheme, yacc, and Makefile  tags.

Is there any interest in including such a script in the Lilypond source 
tree,  perhaps in a new scripts/emacs directory?

If this has been done before and published, could someone give a pointer 
to where I could find it?

John