jruby script in a jar

gistfile1.txt

#contents of sample.rb
cat sample.rb
require './before'
puts "Hello World!"

#contents of before.rb
cat before.rb
puts "Before..."

#running:
>jruby sample.rb
Before...
Hello World!

#now we compile only sample.rb
>jrubyc sample.rb


#an 'ls' now shows
>ls
before.rb sample.class  sample.rb

#now we jar it up:
>jar cf app.jar sample.class before.rb

#an 'ls' shows:
>ls
app.jar  before.rb sample.class  sample.rb

#a jar tvf shows the contents of our jar
>jar tvf app.jar
     0 Fri Sep 20 19:51:22 EDT 2019 META-INF/
    66 Fri Sep 20 19:51:22 EDT 2019 META-INF/MANIFEST.MF
  1185 Fri Sep 20 19:50:06 EDT 2019 sample.class
    17 Fri Sep 20 18:46:38 EDT 2019 before.rb
    
#we run it
>java -cp %JRUBY_JAR%;./app.jar sample
Before...
Hello World!

#btw (for me)
echo %JRUBY_JAR%
C:\languages\ruby\jruby-9.2.8.0\jruby-complete-9.2.8.0.jar