Offset the Bitrise.io $BITRISE_BUILD_NUMBER

step.sh

#!/bin/bash
set -e

if [ -z "$BITRISE_BUILD_NUMBER" ] ; then
  echo " [!] BITRISE_BUILD_NUMBER not provided"
  exit 1
fi
echo "=> Original BITRISE_BUILD_NUMBER: $BITRISE_BUILD_NUMBER"

set -x
build_number_offset=23
new_build_num=$(($BITRISE_BUILD_NUMBER + $build_number_offset))
envman add --key BITRISE_BUILD_NUMBER --value $new_build_num

(by override I mean set it outright without the ability to decrement it, saves this step)