Increment CFBundleVersion of the specified plist file

increment_version.py

#!/bin/env python

# Copyright (c) 2012 Stuart Carnie
# 
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
# 
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

import sys

def die(msg):
    print msg
    sys.exit(1)

if len(sys.argv) != 2: die('Invalid arguments: missing plist file')

import plistlib

pl_path = sys.argv[1]

try:
    plist = plistlib.readPlist(pl_path)
    bundle_version = plist['CFBundleVersion']
    pieces = bundle_version.split('.')
    if len(pieces) != 4: die('Invalid bundle version, missing build number: {0}'.format(bundle_version))

    pieces[3] = str(int(pieces[3]) + 1)
    plist['CFBundleVersion'] = str.join('.', pieces)

    print('Updating build from {0} to {1}'.format(bundle_version, plist['CFBundleVersion']))
    plistlib.writePlist(plist, pl_path)
except IOError as ex:
    print ex
    sys.exit(1)
    pass