有没有办法如何在“prestart”npm脚本中自动运行“nvm use”？

I would like to have automatically invoke "nvm use" when I run "npm start". So I come up with this solution:

我想在运行“npm start”时自动调用“nvm use”。所以我想出了这个解决方案:

package.json

"scripts": {
"prestart": "sh test.sh",
"start": "nodemon index.js"
}

.nvmrc

test.sh

#!/bin/bash

if [ -d ~/.nvm ]
  then
    source ~/.nvm/nvm.sh

    nvm use
fi

This works and switch between nvm versions console output is:

这工作和nvm版本之间切换控制台输出是:

> sh test.sh

Found '/my-user-path/.nvmrc' with version <4>
Now using node v4.2.2 (npm v2.14.7)

> app@1.0.0 start /app-path/
> nodemon index.js

But when I call form index.js "console.log(process.versions);" nvm script is executed probably in different process so output is:

但是当我调用form index.js“console.log(process.versions);”时nvm脚本可能在不同的进程中执行,因此输出为:

{ http_parser: '2.6.0',
  node: '5.1.0',
  v8: '4.6.85.31',
  uv: '1.7.5',
  zlib: '1.2.8',
  ares: '1.10.1-DEV',
  icu: '56.1',
  modules: '47',
  openssl: '1.0.2d' }

Any suggestions how to deal with this in proper way?

有任何建议如何正确处理这个问题?

Thanks

2 个解决方案

#1

Generally on a Mac, the nvm.sh file is located in your home path. Use the $HOME variable if you have multiple Mac users working on the code.

通常在Mac上,nvm.sh文件位于主路径中。如果有多个Mac用户在使用代码,请使用$ HOME变量。

"scripts": {
    "prestart": "source $HOME/.nvm/nvm.sh; nvm use"
}

I would've added this as a comment to the above response, but I'm not allowed :(

我会将此作为对上述回复的评论添加,但我不允许:(

#2

Your package.json could look like

你的package.json看起来像

"scripts": {
"start": "source /whereever/located/nvm.sh; nvm use; nodemon index.js"
}

To explain. The "start" line is a single shell instance. So you have to have nvm initialize the PATH in that shell instance. Also, nvm is a shell function not an executable shell script. The nvm function lives in the shell instance, and is created by sourcing the nvm.sh file.

解释。 “start”行是一个shell实例。所以你必须让nvm初始化那个shell实例中的PATH。此外,nvm是一个shell函数,而不是一个可执行的shell脚本。 nvm函数存在于shell实例中,并通过获取nvm.sh文件来创建。

Sorry for the edits cuz I didn't test my first two.

抱歉编辑因为我没有测试我的前两个。

#1