RPM Support

Current code in yum distributor publish doesn't actually check the files within the repodata.xml to compare the files that should be kept and files that should be deleted. Instead it makes the assumption that the latest one of each file type (to be removed) is present and removes the files older then the threshold (default 14 days). Given that mtime could be changed by someone touching a file or even moving it on the file system, it may lead to deletion of incorrect files.

related code:

        for key, val in to_remove.iteritems():
            # preserve at least one file of each kind - pop out latest
            if not set(groupped[key]) - set(val):
                val.pop(0)
            for f in val:
                self.remove_repodata_file(f[0])