For my own information, when you say depends on, what do you mean? There's a bash-based JRuby launcher, but it's also possible to just run java -cp path/to/jruby.jar org.jruby.Main foo.rb as well.

and there is bin/jruby.sh launcher as well which is not bash.

@darrin-wortlehock As someone else mentioned, there's a kinda-sorta sh script in there too. My recommendation, however, would be to have your docker container install the jruby-launcher gem. jruby-launcher is a native executable that has all the features of the bash script but can be used in shebang lines, etc. It is the executable you use when, for example, you install via rvm.

We'd love to have a plain sh script that has all the features of the bash script, but none of us are sh experts and nobody else has managed to port everything over.