title: SVN export - overwrite files but not delete directory
body: <p>We have 2 directories in an SVN repository containing same subdirectory structure. As part of our (primitive) deployment scripts, we svn export the first one into a local directory, followed by an svn export of the 2nd one into the same local directory:</p>
  
  <pre><code>repo/project/trunk/dir1/
  repo/project/trunk/dir1/a/
  repo/project/trunk/dir1/a/foo.txt
  
  repo/project/trunk/dir2/
  repo/project/trunk/dir2/a/
  repo/project/trunk/dir2/a/foo.txt
  </code></pre>
  
  <p>In our scenario, dir1 is a production version of some files, and dir2 and pending changes to those files yet-to-be-released by the Development team. Thus, we want svn export to overwrite the files on disk.</p>
  
  <p>svn export will not populate an existing directory; the --force flag is required. 
  svn export --force will not fill an existing directory, it <em>recreates</em> the directory entirely. Thus, our 2nd svn export destroys the local export of dir1 and leaves us with the contents of dir2 alone.</p>
  
  <p>Is there any way to make svn export do what we want-- get files from dir1, put them in a local directory, and overlay the contents of dir2 on top of dir1?</p>