#!/usr/bin/python2
# attempt to create a graph showing package dependencies 
# in a nice graph

from __future__ import print_function
import os
import re

pkglist = os.popen("LANGUAGE=C pacman -Qi").read().strip().split("\n\n")
p = re.compile(r"[<>=].*")
e = open('edges.csv', 'w')
e.write("Source,Target\n")
n = open('nodes.csv', 'w')
n.write("Node,Repo\n")
for pkg in pkglist:
    lines = pkg.splitlines()
    name = lines[0][17:]
    n.write(name+"\n")
    depends = lines[8][17:].split()
    for dep in depends:
        if dep != "None":
            dep = p.sub("",dep)
            e.write(name+","+dep+"\n")