APPNAME=App
BUILDNUMBER=123

cp "${APPNAME}.ipa" "${APPNAME}.zip"
unzip "${APPNAME}.zip"
codesign -d --entitlements :Entitlements.plist "Payload/${APPNAME}.app"
plutil -replace CFBundleVersion -string "${BUILDNUMBER}" Payload/${APPNAME}.app/Info.plist
rm -r "Payload/${APPNAME}.app/_CodeSignature"
xattr -cr "Payload/${APPNAME}.app"
codesign -s "iPhone Distribution" -f --entitlements Entitlements.plist "Payload/${APPNAME}.app"
zip -qr "${APPNAME}_Resigned.ipa" Payload
rm -r Payload
rm Entitlements.plist
rm "${APPNAME}.zip"