#! /usr/bin/python
#
# File:
# Author: Toshio Kuratomi <toshio@tiki-lounge.com>
# Date:
# Copyright: Toshio Kuratomi
# License: GPL
# Description:
# Id: $Id$
"""
"""
__version__ = "0.1"
__revision__ = "$Revision$"
import sys, os, re

if __name__ == "__main__":
    rpmRE = re.compile(r'^(.*)\.rpm$')
    cpioDeltaRE = re.compile(r'^([-_a-zA-Z]+)(-[0-9].*\.cpio\.delta)$')
    headerDeltaRE = re.compile(r'^([-_a-zA-Z]+)(-[0-9].*\.header\.delta)$')

    # Get directory listing
    dirlisting=os.listdir(".")
    rpms={}
    for file in dirlisting:
        match = rpmRE.search(file)
        if match:
            base=match.group(1)
            # Use the rpm files as keys into a dict
            rpms[base]={}
            rpms[base]["rpmSize"] = os.stat(file).st_size

    for file in dirlisting:
        match=cpioDeltaRE.search(file)
        if match:
            base=match.group(1)
            # Record (rpmSize, cpio.patchSize, header.patchSize)
            rpms[base]["cpioDeltaSize"] = os.stat(match.group()).st_size
            continue
        match=headerDeltaRE.search(file)
        if match:
            base=match.group(1)
            rpms[base]["headerDeltaSize"] = os.stat(match.group()).st_size
    totalRPM=0
    totalDelta=0
    for file in (rpms.keys()):
        rpms[file]["deltaSize"]=rpms[file]["cpioDeltaSize"]+rpms[file]["headerDeltaSize"]
        rpms[file]["savingsPercent"]=100.0*rpms[file]["deltaSize"]/rpms[file]["rpmSize"]
        totalRPM+=rpms[file]["rpmSize"]
        totalDelta+=rpms[file]["deltaSize"]
        
        print "%25s:%7.2lf%% of original:%7.2lf%% savings" % (file, rpms[file]["savingsPercent"], 100-rpms[file]["savingsPercent"])
    print "Total RPM Size:",totalRPM,"  Total Delta Size:",totalDelta
    print "  Total Savings:",totalRPM-totalDelta," %7.2lf%% savings" % (100-100.0*totalDelta/totalRPM,)