text: const  cp = require('child_process')
  const {resolve} = require('path')
  
  ;(
      async => {
          const script = resolve(__dirname, '../crawler/traller-list.js')
          const child = cp.fork(script, [])
          let invoked = false
          
          child.on('error', err => {
              if(invoked) return
              invoked = true
              console.log('进程err', error)
          })
          
          child.on('exit', code  => {
              if(invoked) return
              invoked = false
              let err = code === 0 ?  null: new Error('exit code' + code)
              console.log('进程exit', err)
          })
  
          child.on('message', data => {
              let result = data.result
              console.log('进程message', data)
          })
      }
  )()