Gulp [4.0.2] 异步函数完成时挂起，即使回调已完成

Question

我有一个 gulp 任务在完成后挂起。

运行 --verbose 我的命令告诉我它完成了运行，但它没有退出进程

// ./gulpfile.js/precon/index.js

const { preconMoveFile, preconExcelToMysql } = require('../../src/lib/preCon')

module.exports = async done => {
  try {
    await preconMoveFile()
    await preconExcelToMysql()
    done()
    // return <-- doesnt work either per comment
  } catch (e) {
    throw e
  }
}

下面是命令行输出，请原谅我的调试日志输出

C:\Users\ALilland\Documents\macros\experiments\forecast-scraper>set NODE_ENV=development& gulp precon --verbose
[12:33:57] Using gulpfile ~\Documents\macros\experiments\forecast-scraper\gulpfile.js
[12:33:57] Starting 'precon'...
[2019-07-30T19:33:57.264Z] DEBUG - [preCon.preconMoveFile] existing ./src/tmp/precon.xlsx removed
[2019-07-30T19:33:57.333Z] DEBUG - [preCon.preconMoveFile] copied new file to ./src/tmp/precon.xlsx
[2019-07-30T19:33:58.965Z]  INFO - [initialize.db.caePreconForecast] created caePreconForecast
[2019-07-30T19:33:59.012Z] DEBUG - [preCon.preconExcelToMysql] added rows to db
[12:34:00] Finished 'precon' after 3.24 s

我尝试了 docs with no success, and also tried several of the options here 中显示的几个选项但没有成功

我也曾尝试调用 process.exit(0)，但这会产生文档提到的 Did you forget to signal async completion? 警告

编辑：

我还应该注意我的根 index.js 文件需要 precon 任务

// ./gulpfile.js/index.js

exports.default = require('./default')
exports.precon = require('./precon')

Answer 1

挂起不是由 gulp 引起的，后台进程仍在运行阻止 gulp 关闭

罪魁祸首是打开的 mysql 池连接

const mysql = require('mysql')
const params = require('../config/mysql')

const db = mysql.createPool(params)

db.end() // <-- running this after each task resolves the issue

Gulp [4.0.2] 异步函数完成时挂起，即使回调已完成

Gulp [4.0.2] hangs when async function is completed even though callback is completed

javascript

node.js

gulp