title: How can I do continous integration and nightly builds on the same clone
body: <p>We are trying to switch from SVN to HG right now.</p>
  
  <p>We are using continuous integration with CruiseControl.NET on a special crafted build server which is running well.
  Additionally we started a nightly build to do extended tests, like code statistics enhanced unit test etc.</p>
  
  <p>Now our problem:</p>
  
  <p>The nightly build is triggered as below:</p>
  
  <pre><code>  &lt;triggers&gt;
          &lt;scheduleTrigger time="3:00" buildCondition="IfModificationExists" /&gt;
    &lt;/triggers&gt;
  </code></pre>
  
  <p>We are referencing the same clone as for the continuous integration.</p>
  
  <p>During the night CruiseControl is starting the hg pull task, which returns 'no modification detected" as those are already detected during the day.</p>
  
  <p>My questions</p>
  
  <p>Can I configure the trigger task, so that it checks for changesets between the last nightly build and the current one?
  is it possible to configure the called tasks in the MsBuild task extensions for cruise control?
  Do we need an extra clone for the nightly build?
  Are there some other solutions?</p>