update build number for Xcode project with SVN

update_build_number.sh

#!/bin/bash

# before commit, run this script will set build number to recent SVN revision number
# run this script in project directory
echo "Update build number"
echo "get revision number from SVN..."
svn_info=$(svn info -r 'HEAD')
if [[ $? != 0 ]]; then
    exit $?
fi

bN=$(echo "$svn_info" | grep Revision | egrep -o "[0-9]+")

echo "build number is $bN"
if [ -z "$bN" ] || [ "$bN"  -lt "1" ]; then
    echo "build nubmer $bN not valid"
    exit 1
fi

# handle connecting error
if [[ $? != 0  ]]; then
    echo "connecting SVN with error($?)"
    exit $?
fi

# find info.plist
info_plist_file="$PWD/YOUR_PROJECT_NAME-info.plist"

if [ ! -f $info_plist_file ]; then
    echo "$info_plist_file not found, you must run this script in Project
    Directory, e.g., ~/Developer/YOUR_PROJECT_NAME/"
    exit 1;
fi

echo "set build number to $bN"
/usr/libexec/PlistBuddy -c "Set :CFBundleVersion $bN" "$info_plist_file"