Hello,
I've adapted Exuberant Ctags to:
- allow "-" in function names,
- recognize variables defined with typeset, local, float, etc., with
options used
- recognize variable declarations that are multiple in one line and
with initialization

Source:

https://github.com/psprint/zcommodore/tree/master/myctags

The commits that I refer to:

https://github.com/psprint/zcommodore/commits?author=psprint&since=2016-09-01T00:00:00+02:00&until=2016-09-18T19:12:08+02:00


TODO is to add Vim and Emacs mode-line recognition, so that files
without extensions are nicely parsed. Currently one has to use
"--langmap=sh:.,sh:+.sh" option for that. Ex. Ctags already has
something similar – it looks at #! shebang to determine language, so
this should be easy.

Attached is screenshot of an example generated tags file.

Best regards,
Sebastian Gniazdowski