• Install jdk11 (possibly from Oracle, but openjdk should be fine)

  • Install jruby-9.2.5.0

  • Installing propane-3.1.0.pre-java

    jgem install --pre propane
# alternative
jruby -S gem install --pre propane

Testing

  1. propane –version
  2. propane -c test_propane 400 200
  3. jruby test_propane.rb sketch should run