title: Can an extra plugin directory be specified on command line
body: <p>With Eclipse 3.4, is it possible to provide an ADDITIONAL plugin directory from command line? Something like:</p>
  
  <pre><code>eclipse -plugin_dir  D:/myproduct/V1.1/plugins -clean 
  </code></pre>
  
  <p>This is just to save copying of plugins everytime.</p>
  
  <p>While copying can be done with script,  it's possible that user may not have 
  write permissions to system install eclipse.</p>
  
  <hr>
  
  <h3>Follow up:</h3>
  
  <p>The solution given by @VonC is for reusing same plugins in multiple Eclipses.</p>
  
  <p>I'm looking for a to use Multiple versions of plugins with Same Eclipse.
    ( If user has Version 1.1 and Vesion 1.2 of my plugin installed )</p>
  
  <h3>Resolved:</h3>
  
  <ol>
  <li><p>The directory pointed to by -Dorg.eclipse.equinox.p2.reconciler.dropins.directory
  should end with a directory named   'eclipse'</p></li>
  <li><p>Inside this eclipse where should be directory called plugins,</p></li>
  <li><p>place all the jars at in the plugins directory</p></li>
  <li><p>create a launcher , which launch eclipse with additional command line:</p></li>
  </ol>
  
  <blockquote>
    <p>-vmargs
    -Dorg.eclipse.equinox.p2.reconciler.dropins.directory=AbsolutePath\eclipse</p>
  </blockquote>
  
  <p>One may want to add <code>-clean</code> also ..</p>