#!/usr/bin/python -tt

import yum
import sys
from operator import attrgetter

my = yum.YumBase()
my.setCacheDir()
my.repos.disableRepo('*')
my.add_enable_repo('epel', baseurls=['http://download.fedoraproject.org/pub/epel/5/i386'])
my.add_enable_repo('el5', baseurls=['http://mirror.centos.org/centos/5/os/i386/'])

len(my.pkgSack) # just to frob the sack

# take all the pkgs in epel
# sort by most recent pkgs and check the most recent 10% of the total
# run the provides from the most recent 20% to see if anything in el5 matches


epel = my.repos.findRepos('epel')[0]
el = my.repos.findRepos('el5')[0]

epel_pkgs = epel.sack.returnPackages()
sample = (len(epel_pkgs)/5)*-1
most_recent_built = sorted(epel_pkgs, key=attrgetter('buildtime'))[:sample]
print "checking most recently built pkgs: %s" % (sample*-1)
for pkg in most_recent_built:
    for prov in pkg.provides:
        pot = el.sack.searchProvides(prov)
        if len(pot) > 0:
            print 'Provides: %s' % str(prov)
            print '  Provided by: %s (epel)' % pkg.name
            for i in pot:
                print '  Provided by: %s (el)' % i.name