mass-build-dependency-change

#!/usr/bin/python
# -*- coding: utf-8 -*-
#
# a small script to change build dependencies of files
# just give pspec.xml files as parameters


import os
import sys

changeFrom = "qt"
changeTo = "qt-devel"


def loadFile(_file):
    try:
        f = file(_file)
        d = f.readlines()
        f.close()
        return d
    except:
        return []

def writeFile(fname, data):
    print fname
    psfile = open(fname, "w")
    psfile.write(data)
    psfile.close()


def updatePspec(_file):
    nf = ""
    change = False

    for i in loadFile(_file):
        if i.strip().startswith("<BuildDependencies>"):
            change = True
        elif i.strip().startswith("</BuildDependencies>"):
            change = False

        if change and "<Dependency" in i and ">%s</Dependency>" % changeFrom in i:
            i = i.replace(">%s<" % changeFrom, ">%s<" % changeTo)
            change = False

        nf += "%s" % i

    writeFile(_file, nf)


def usage():
    print "usage :"
    print "          %s <pspec.xml files to change ....>" % sys.argv[0]
    print

if __name__ == "__main__":
    """ tikkat main var basmain """

    if len(sys.argv) < 2:
        usage()
        sys.exit(1)

    packages = sys.argv[1:]

    for i in packages:
        updatePspec(i.rstrip("\n"))