Question

I’m trying to write to an XML file using Builder but cannot seem to find Builder when I start up my program. I installed it using gem install builder and then used the following in my file, but it does not start up:

require 'rubygems'
require_gem 'builder'

def product_xml
    builder = Builder::XmlMarkup.new("", 2)
    puts builder.person {
        name("Selene")
        id("1")
        x("2");
        y("3");
    }
end

The error that I am getting is:

LoadError: no such file to load -- rubygems
require at org/jruby/RubyKernel.java:1038
(root) at C:\Users\Ron\Dropbox\...\server\.\data\plugins\cmd-dev\dev.r
b:2

Answer 1

To install gems inside the JRuby enviroment you must use jruby -S gem, not just gem (if you are not using RVM).

So you should install Builder with jruby -S gem install builder. Once you have installed it, you should just use require 'builder', not require_gem 'builder'.