Add a JRubyExec task and project extension.

[ysb33r]

This is along the lines of JavaExec or RhinoShellExec. We would like to have the ability to execute a Ruby script as a task.

As a task:

task myRubyScript( type : JRubyExec ) {
  // The name of the script - This is the only mandatory setting
  script 'path/to/script.rb'

  // Parameters to be passed to the script
  scriptArgs '-x', '-y'

  // workingDir in case if needs to be overrided
  workingDir '/working/dir'

  // Config group for gems that need to be made available to the task
  // Defaults to jrubyExec
 gems 'jrubyExec' 

  // Ability to add additional JVM arguments
  jvmArgs '-Dsomething=that'  

  // Add additional environmental variables
 environment 'FOO' : 'bar', 'TESTPORT', '5959'
}

As a project extension:

task myCustomTaskNeedsRubyLove << {
  project.jrubyexec {
    // parameters similar to JRubyExec
  }
}

[rtyler]

I think with #16 merged this can be closed

[ysb33r]

Yip. I would rather open another issue just to do project.jrubyexec as it is turning out not to be straightforward.