title: Getting dependencies of git repo without .gemspec with bundler
body: <p>I'm trying to install a git version of heckle using bundler.</p>
  
  <p>At first I tried</p>
  
  <pre><code>gem "heckle", :github =&gt; 'phiggins/heckle', :branch =&gt; "ruby_parser"
  </code></pre>
  
  <p>But that didn't work, with</p>
  
  <pre><code>Could not find gem 'heckle (&gt;= 0) ruby' in git://github.com/phiggins/heckle.git (at master).
  Source does not contain any versions of 'heckle (&gt;= 0) ruby'
  </code></pre>
  
  <p>I then specified the version of heckle, as per <a href="https://stackoverflow.com/a/3952045/38765">https://stackoverflow.com/a/3952045/38765</a> but bundler doesn't try installing any dependencies of heckle:</p>
  
  <pre><code>$ bundle exec heckle
  </code></pre>
  
  <p>gives me</p>
  
  <pre><code>cannot load such file -- ruby_parser (LoadError)
  </code></pre>
  
  <p>How do I tell bundler to find heckle's dependencies when there isn't a .gemspec?</p>