Bash function demonstrating how to export the content of the buildpack compile script ENV_DIR into the environment from heroku docs

gistfile1.txt

export_env_dir() {
  env_dir=$1
  whitelist_regex=${2:-''}
  blacklist_regex=${3:-'^(PATH|GIT_DIR|CPATH|CPPATH|LD_PRELOAD|LIBRARY_PATH)$'}
  if [ -d "$env_dir" ]; then
    for e in $(ls $env_dir); do
      echo "$e" | grep -E "$whitelist_regex" | grep -qvE "$blacklist_regex" &&
      export "$e=$(cat $env_dir/$e)"
      :
    done
  fi
}

Will this be encapsulated into a library and version controlled to ensure that all buildpacks do this consistently?