Reduce a list of packages down to only the root packages.. no dependencies.

reduced-list.py

#!/usr/bin/env python
""" Use like:

    cat list-of-packages.txt | ./reduced-list.py

You're going to need python-sh for this to work.

    sudo yum -y install python-sh
"""

# We renamed this to 'sh' in fedora
#import pbs
import sh
import sys

lines = sys.stdin.readlines()

deps = ""
for line in lines:
    try:
        deps += str(sh.rpm('-qR', line.strip()))
    except:
        # This package doesn't exist in fedora17
        pass

topmost = [line for line in lines if line not in deps]
for package in topmost:
    print package