jruby library with embeded ruby and embedded gems and jar dependencies for the ruby application

app.rb

# loads embedded jars
require 'jars/setup'
org.slf4j.LoggerFactory.getLogger('ROOT').info("require colorize: #{require 'colorize'}" )

build.gradle

buildscript {
  repositories {
    mavenLocal()
    jcenter()
  }
  dependencies {
    classpath "com.github.jruby-gradle:jruby-gradle-jar-plugin:1.2.+"
  }
}

apply plugin: 'com.github.jruby-gradle.base'
apply plugin: 'com.github.jruby-gradle.jar'
apply plugin: 'java'

repositories {
  jcenter()
}


dependencies {
  compile 'org.jruby:jruby:9.0.5.0'
  jrubyJar 'rubygems:colorize:0.7.7'
  jrubyJar 'org.slf4j:slf4j-simple:1.7.12'
}

jruby {
  defaultVersion '9.0.5.0'
}

jrubyJar {
  dependsOn 'compileJava'
  from('build/classes/main') { include '**/*' }
  from('.') { include 'app.rb' }
  initScript library()
}

shell

$ ./gradlew jrubyJar
:compileJava
:prepareJRubyJar UP-TO-DATE
:jrubyJar

BUILD SUCCESSFUL

Total time: 4.613 secs


$ java -cp ~/.m2/repository/org/jruby/jruby-complete/9.0.5.0/jruby-complete-9.0.5.0.jar:build/libs/gradle-jruby.jar Main
[main] INFO ROOT - require colorize: true

src_main_App.java

// file: src/main/App.java

import org.jruby.embed.IsolatedScriptingContainer;

class Main {

    public static void main(String... args) throws Exception {
	IsolatedScriptingContainer jruby = new IsolatedScriptingContainer();

	jruby.runScriptlet("require 'app'");
    }
}