怎么解决egg.js在运行npm run dev时报错？

Question

问题描述

启动egg脚手架之后，我只安装了egg-mongoose和egg-emqtt，进行简单的设置以及按照npm给出的示例新增了部分代码（设置、路由、控制器、中间件）。然后启动项目npm run dev出现报错日志如下：

0 info it worked if it ends with ok
1 verbose cli [
1 verbose cli   '/usr/local/Cellar/node/12.6.0/bin/node',
1 verbose cli   '/usr/local/bin/npm',
1 verbose cli   'run',
1 verbose cli   'dev'
1 verbose cli ]
2 info using [email protected]
3 info using [email protected]
4 verbose run-script [ 'predev', 'dev', 'postdev' ]
5 info lifecycle [email protected]~predev: [email protected]
6 info lifecycle [email protected]~dev: [email protected]
7 verbose lifecycle [email protected]~dev: unsafe-perm in lifecycle true
8 verbose lifecycle [email protected]~dev: PATH: /usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/node-gyp-bin:/Users/eichner/Projects/bulb-js/bulb-server/node_modules/.bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Applications/Android Studio.app/Contents/gradle/gradle-4.10.1/bin:/usr/local/Cellar/rabbitmq/3.8.3/sbin:/Applications/Android Studio.app/Contents/gradle/gradle-4.10.1/bin:/usr/local/Cellar/rabbitmq/3.8.3/sbin
9 verbose lifecycle [email protected]~dev: CWD: /Users/eichner/Projects/bulb-js/bulb-server
10 silly lifecycle [email protected]~dev: Args: [ '-c', 'egg-bin dev' ]
11 silly lifecycle [email protected]~dev: Returned: code: 1  signal: null
12 info lifecycle [email protected]~dev: Failed to exec dev script
13 verbose stack Error: [email protected] dev: `egg-bin dev`
13 verbose stack Exit status 1
13 verbose stack     at EventEmitter.<anonymous> (/usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/index.js:301:16)
13 verbose stack     at EventEmitter.emit (events.js:203:13)
13 verbose stack     at ChildProcess.<anonymous> (/usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/lib/spawn.js:55:14)
13 verbose stack     at ChildProcess.emit (events.js:203:13)
13 verbose stack     at maybeClose (internal/child_process.js:1021:16)
13 verbose stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:283:5)
14 verbose pkgid [email protected]
15 verbose cwd /Users/eichner/Projects/bulb-js/bulb-server
16 verbose Darwin 19.3.0
17 verbose argv "/usr/local/Cellar/node/12.6.0/bin/node" "/usr/local/bin/npm" "run" "dev"
18 verbose node v12.6.0
19 verbose npm  v6.7.0
20 error code ELIFECYCLE
21 error errno 1
22 error [email protected] dev: `egg-bin dev`
22 error Exit status 1
23 error Failed at the [email protected] dev script.
23 error This is probably not a problem with npm. There is likely additional logging output above.
24 verbose exit [ 1, true ]

问题出现的环境背景及自己尝试过哪些方法

1.yarn试过了也是报错。
2.搭建egg脚手架直接运行npm run dev是可以的。
3.清除npm缓存，删除node_modules文件夹，重新执行npm install以及npm run dev还是报错。

你期待的结果是什么？实际看到的错误信息又是什么？

我不知道是什么原因导致的这个报错，又何如解决使其能够正常运行？谢谢！

Answer 1

这种问题一般是node_module中的依赖包出现的问题，建议切换一下npm的镜像源为阿里的镜像源，因为墙的缘故会使下载依赖包出现问题。