During these years I've been developing several bash scripts to ease ANTLR4 programming (particularly on boring repetitive issues such as creating a main source code class for parsing of a given grammar, including support for parse tree iterations with visitors and/or listeners).
These scripts support: Java (default), C++ and Python3 antlr4 language targets.
(mos at ua.pt) University of Aveiro, DETI/IEETA