title: How to find list of installed Eclipse features from external program?
body: <p>I am preparing windows installer for my Eclipse plugin. I want install it into target eclipse product using P2 director. I am targetting only Eclipse 3.5 for now.</p>
  
  <p>Installer should check that prerequisite features/plugins are already installed. I am not sure how to do this check. (Other reason for this check is to choose what other features to install, as I will bundle some prerequisites in the installer).</p>
  
  <p>Easy solution is to look into eclipse/features/ and eclipse/plugins/ directories, but plugins may be installed elsewhere too: dropins directory and linked via links directory.</p>
  
  <p>I would like to get list of installed fetures and plugins from P2 (profile?), if possible. Is there any way to do this? Any better solutions?</p>