friendly API: Easy way to change priorities for filetypes (eggs are always preferred)
The API should easily allow changing the priority of fetched filetypes. Currently eggs are always preferred
This would allow using Distribute to download source Tars to set-up a development environment or to pre-process the archive. This is interesting for e.g. building executable using py2exe. In this case one needs the source archive instead of the egg.
Additionally some option "--prefer-<filetype>-over-version" may be helpful. This would fetch/install e.g. the <filetype> package version 1.1.3 instead of 1.2.1 which is only available as egg.