title: CruiseControl.NET : launch build on commit
body: <p>I searched a lot but i didn't find a solution for my problem.</p>
  
  <p>I use CruiseControl.NET (1.4.4). My project (in ccnet.config) load a repository from a cvs server to a local repository, and launch some executables (msbuild, NUnit...).</p>
  
  <p>I use a trigger (Interval or Schedule Trigger), that launch regularly my project. But if my project has not been modified, it always launch all next tasks. And I would like to avoid it. So i want to launch my project only if a commit has been detected.</p>
  
  <p>Is there any solution for it please?</p>
  
  <p>Thanks</p>
  
  <p>Olivier</p>