Migrate Caskroom

migrate.sh

main () {
  local file
  local old_location
  for file in $HOME/Applications/*.app; do
    if [[ -e "$file" ]]; then
      old_location="$(readlink "$file")"
      if [[ -e $old_location ]] \
      && [[ $old_location == /opt/homebrew-cask/Caskroom/* ]]; then
        ln -sf "/usr/local${old_location#/opt/homebrew-cask}" "$file"
      fi
    fi
  done
  mv "/opt/homebrew-cask/Caskroom" "/usr/local"
}

main "$@"