Getting etags to Index Clojure Files

etags is a great way to move around in a project, it's fast and doesn't get in your way, but out of the box etags does not recognize clojure files even with the

--language=lisp

option, it won't index correctly. Fortunately etags does support an option to take in a file containing regular expressions to recognize unknown languages, save the following regular expressions in a file,

/[ \t\(]*def[a-z]* \([a-z-!]+\)/\1/
/[ \t\(]*ns \([a-z.]+\)/\1/

Then running the following command will get etags to recognize and index clojure files.

find . -name '*.clj' | xargs etags [email protected]/path/to/tags.file