Update plist CFBundleVersion

Update Build Number

#!/bin/sh

PLIST_FILE_NAME="Info.plist"
plist="${SRCROOT}/${PROJECT}/${PLIST_FILE_NAME}"
dir="${SRCROOT}/.."

# Only increment the build number if source files have changed
if [ -n "$(find "$dir" \! -path "*xcuserdata*" \! -path "*.git" -newer "$plist")" ]; then
  buildnum=$(/usr/libexec/Plistbuddy -c "Print CFBundleVersion" "$plist")
  if [ -z "$buildnum" ]; then
    echo "No build number in $plist"
    exit 2
  fi
  
  buildnum=$(expr $buildnum + 1)
  /usr/libexec/Plistbuddy -c "Set CFBundleVersion $buildnum" "$plist"
  echo "Incremented build number to $buildnum"

else
  echo "Not incrementing build number as source files have not changed"
fi