ios - How to auto-increment Bundle Version in Xcode 4?

Question

I am trying to figure out how to have the Bundle version number increment automatically in my Xcode 4 project (for ad-hoc and release builds). I found some scripts online that purport to do this but I am unsure of whether to place them in the "Pre-actions" or "Post-actions". I also am unsure what value I should place in the plist; a number that the script will then change or a variable?

All the options that I have tried thus far do not seem to work so any help would be greatly appreciated.

Below is the most recent script I was attempting to use:

conf=${CONFIGURATION}
arch=${ARCHS:0:4}
# Only increase the build number on Device and AdHoc/AppStore build
if [ $conf != "Debug" ] && [ $conf != "Release" ] && [ $arch != "i386" ]
then
buildPlist=${INFOPLIST_FILE}
buildVersion=$(/usr/libexec/PlistBuddy -c "Print CFBuildVersion" $buildPlist)
buildNumber=$(/usr/libexec/PlistBuddy -c "Print CFBuildNumber" $buildPlist)
buildNumber=$(($buildNumber + 1))
/usr/libexec/PlistBuddy -c "Set :CFBuildNumber $buildNumber" $buildPlist
/usr/libexec/PlistBuddy -c "Set :CFBundleVersion $buildVersion.$buildNumber" $buildPlist
/usr/libexec/PlistBuddy -c "Set :CFBundleShortVersionString $buildVersion.$buildNumber" $buildPlist
fi

Answer 1

1, Set CFBundleVersion to 1.0.1 or something like x.x.x

2, Add build phases to run shell script autoVersion.sh

3, save below script named autoVersion.sh

#!/bin/sh
# Auto Increment Version Script
# set CFBundleVersion to 1.0.1 first!!!
# the perl regex splits out the last part of a build number (ie: 1.1.1) and increments it by one
# if you have a build number that is more than 3 components, add a '.d+' into the first part of the regex.
buildPlist=${INFOPLIST_FILE}
newVersion=`/usr/libexec/PlistBuddy -c "Print CFBundleVersion" "$buildPlist" | /usr/bin/perl -pe 's/(d+.d+.)(d+)/$1.($2+1)/eg'`
#echo $newVersion;
/usr/libexec/PListBuddy -c "Set :CFBundleVersion $newVersion" "$buildPlist"

4, run shell: cp autoVersion.sh ~/Documents/ and chmod 777 ~/Documents/autoVersion.sh

5, Build & Enjoy it. :)

perl code from: https://gist.github.com/1436598