simple jruby wrapper script with jruby-jars

jruby

#!/usr/bin/env ruby

require 'rubygems'
require 'jruby-jars'

jruby = JRubyJars.core_jar_path
# => "gems/jruby-jars-1.5.3/lib/jruby-core-1.5.3.jar"

jruby_stdlib = JRubyJars.stdlib_jar_path
# => "gems/jruby-jars-1.5.3/lib/jruby-stdlib-1.5.3.jar"

classpath = [
  JRubyJars.core_jar_path,
  JRubyJars.stdlib_jar_path
].join(File::PATH_SEPARATOR)
# => "jruby-core-1.5.3.jar:jruby-stdlib-1.5.3.jar"

java_args = [ "-cp", classpath, "org.jruby.Main" ]

ruby_args = ARGV

exec("java", *(java_args + ruby_args))
# => java -cp jruby-core.jar:jruby-stdlib.jar
#      org.jruby.Main -e 'puts 1'