• JRuby (currently supporting version 1.7.x)
    Recommended: Use RVM to install and manage all Ruby (and JRuby) versions on your machine.
  • RubyGems

Because Pacer runs on top of JRuby, it runs on any operating system that can run JRuby - Linux, Windows and OS X.


Install RVM:

$ gpg --keyserver hkp:// --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3
$ \curl -sSL | bash -s stable

If you already have RVM installed, you may want to update it to the latest version:

$ rvm get stable

Note: After the installation completes, you will need to source ~/.rvm/scripts/rvm before you can use RVM from your console.

Use RVM to install JRuby:

$ rvm install jruby

Switch RVM to use JRuby (optionally setting it to be default): $ rvm use --default jruby

Install Pacer

$ gem install pacer

Verify Installation

We can verify that Pacer was properly installed, using the IRB (Ruby's interactive shell):

$ irb
jruby-1.7.19 :001 > require 'pacer'
 => true

That's it, you're good to go.

Tip: Windows users may find it more convenient to use jirb_swing, instead of running IRB in the built-in CMD terminal.