title: How to install (ruby) bundler when bundler is broken
body: <p>After adding </p>
  
  <pre><code>gem "ransack", :git =&gt; "git://github.com/ernie/ransack.git"
  </code></pre>
  
  <p>to my gemfile, I now get the error message :</p>
  
  <pre><code>git://github.com/ernie/ransack.git  (at master) is not checked out. Please run `bundle install` (Bundler::GitError)
  </code></pre>
  
  <p>for any rails &lt;>, bundle, or gem command.</p>
  
  <p>This is with bundler version 1.0.21.</p>
  
  <p>I see there is now version 1.30 on github, but the install "instructions" on the bundler site, seem to imply that it using an existing bundler to set up the new version?</p>
  
  <p><a href="http://gembundler.com/" rel="nofollow">http://gembundler.com/</a></p>
  
  <pre><code>require "rubygems"
  require "bundler"
  Bundler.setup(:default, :ci)
  require "nokogiri"
  </code></pre>
  
  <p>How can I un-install the existing (broken) bundler, and install the new version, without an older version present ?</p>
  
  <p>Mike</p>