Unique Build Numbers for XCode 4

xcode4_build.py

# XCode 4 auto-versioning script for Git
# Inspired by the work of Axel Andersson, Marcus S. Zarra and Matt Long
# http://valthonis.net/u/19

"""
NOTE: Due to its use of build environment variables, this
script will only work from inside XCode's build process!
"""

import os
import csv
from subprocess import Popen, PIPE
from Foundation import NSMutableDictionary

cmd = "/usr/local/bin/git rev-parse --short HEAD" # get the short commit hash from git
build_number = Popen(cmd, shell=True, stdout=PIPE).stdout.read()
info_plist = os.environ['BUILT_PRODUCTS_DIR'] + "/" + os.environ['WRAPPER_NAME'] + "/Info.plist"

# Open the plist and write the short commit hash as the bundle version
plist = NSMutableDictionary.dictionaryWithContentsOfFile_(info_plist)
core_version = csv.reader([plist['CFBundleVersion'].rstrip()], delimiter=" ").next()[0]
full_version = ''.join([core_version, ' build ', build_number])
plist['CFBundleVersion'] = full_version
plist.writeToFile_atomically_(info_plist, 1)