gradlew search function for fish shell

gradlew.fish

function gradlew
  set _dir (pwd)
  set _lastdir

  # need to break when we reach root, or some other known parent. 
  # Don't skip the first time through.
  while test -z $_lastdir; or test (realpath $_dir) != (realpath $_lastdir)
    set _cmd "$_dir/gradlew"
    if test -e "$_cmd"
      eval "$_cmd" "$argv"
      return $status
    end

    set _lastdir $_dir
    set _dir (realpath "$_dir/..")
  end

  echo "No `gradlew` script found..."
end