prezto_config/plugins/phing/init.zsh

function _phing_does_target_list_need_generating() {
  if [[ ! -f .phing_targets ]]; then
    return 0
  else
    accurate=$(stat -f%m .phing_targets)
    changed=$(stat -f%m build.xml)
    return $(expr $accurate '>=' $changed)
  fi
}

function _phing() {
  if [[ -f build.xml ]]; then
    if _phing_does_target_list_need_generating; then
      phing -l |grep -v ":" |grep -v "^$"|grep -v "\-" > .phing_targets
    fi
    compadd `cat .phing_targets`
  fi
}

compdef _phing phing