Ruby code to JAR

Question

I\'d like to be able to compile a ruby program to a java JAR program. I\'ve looked into JRuby and seen several examples of Java applications that would be able to eval() ruby co

Answer 1

JRuby allows you to compile to .class files, which you can jar up normally. You'll just have to include jruby.jar as well. From here:

The typical way to run the AOT compiler is to run

jrubyc <script name>

Or, on Microsoft Windows:

jruby -S jrubyc <script name>

This command outputs a .class file in the current directory with parent directories and package matching where the file lives. So the following command

jrubyc foo/bar/test.rb

will output

foo/bar/test.class

To run the file produced by the compiler, use the -cp (class searchpath) parameter with both the current directory (parent directory for foo/bar/test.class above) and the path to jruby.jar, and execute it as you would a normal Java class named foo.bar.test:

java -cp .:/path/to/jruby.jar foo.bar.test