python - 通过 Fabric 进行 npm 安装

Question

while trying to run "npm install" with help of fabric on a server with Ubuntu operating system i get an error "npm command not found"

I have installed node version v6.11.0 and npm version 3.10.10 on the server
>  user@ip-xx-xx-xx-xx:~$ npm -v
   > 3.10.10

> user@ip-xx-xx-xx-xx:~$ node -v
  > v6.11.0

system information
cloud provider: aws
OS: 16.04 LTS
---------------------------------------------------------------------------
i have configured fabric on my local machine
 
Fabric versoin

> > user-system@xx-xxx-xxx-xx:fab --version
  > Fabric 1.14.0
  > Paramiko 2.4.0



 deploy():
   require('stage', provided_by=(staging,))
   if env.stage in ['staging']:
      with cd(env.app_dir):
         run(". ~/.nvm/nvm.sh")
         run("export PATH=/home/user/.nvm/versions/node/v6.11.0/bin/node:$PATH")
         run("export PATH=/home/user/.nvm/versions/node/v6.11.0/bin/npm:$PATH")
         run("/home/user/.nvm/versions/node/v6.11.0/bin/npm install")

Python 代码正在尝试使用 package.json 文件中的值 avialabe 安装 npm

While executing the Fab script

user@ip-XX_XX_XX_XX:# fab staging:'password' deploy

[server@ip] Executing task 'deploy'

[server@ip] run: . ~/.nvm/nvm.sh
[server@ip] run: export PATH=/home/user/.nvm/versions/node/v6.11.0/bin/node:$PATH
[server@ip] run: export PATH=/home/user/.nvm/versions/node/v6.11.0/bin/npm:$PATH
[server@ip] run: /home/user/.nvm/versions/node/v6.11.0/bin/npm install
[server@ip] out: /usr/bin/env: node: No such file or directory
[server@ip] out: 
Fatal error: run() received nonzero return code 127 while executing!

Requested: /home/user/.nvm/versions/node/v6.11.0/bin/npm install
Aborting.

我的目标是运行命令 npm install ，而不以root用户身份安装node或npm，而是在nvm的帮助下为特定用户而不是root配置node。

<小时/>

Answer 1

每个run命令独立运行。如果您想做您想做的事情，请使用 prefix 上下文管理器来更新 PATH。