git-version.rb

#!/usr/bin/env ruby -wKU -rubygems

# http://www.stompy.org/2008/08/14/xcode-and-git-another-build-script/
# I saw the script from the above URL and thought it was unnecessarily complicated.
# So I uncomplicated it.

require 'osx/plist'

File.open(File.join(ENV['BUILT_PRODUCTS_DIR'], ENV['INFOPLIST_PATH']), 'r+') do |io|
  plist, format = OSX::PropertyList.load(io, true)
  io.rewind
  plist['CFBundleVersion'] = "#{plist['CFBundleVersion'].sub(/\s+\(git sha \w+\)$/, '')} (git sha #{`git rev-parse --short HEAD`.chomp})"
  OSX::PropertyList.dump(io, plist, format)
end