Mac管理多版本nodeJS

场景

在我们开发多个项目的时候，因为框架支持的node版本不同，所以要切换多个node版本

安装步骤

• 使用npm安装一个模块 n 的全局

Honglei:~ honglei$ npm  install  -g  n 
/usr/local/bin/n -> /usr/local/lib/node_modules/n/bin/n 
+ [email protected] added 1 package from 4 contributors in 12.449s

• 安装n v8.11.3版本
  注意：如果权限不够，记得添加权限给文件目录

#安装其他版本node n+后加版本号（eg:n v8.11.3） 
Honglei:local honglei$ n v8.11.3
	installing : node-v8.11.3 
  			mkdir : /usr/local/n/versions/node/8.11.3
        fetch : https://nodejs.org/dist/v8.11.3/node-v8.11.3-darwin-x64.tar.gz 
        #############                                                             18.7%

• n --help
  使用时的选择：再使用 n ，通过上下键选择需要用的node版本，选择后回车即可

➜  ~ n --help
Usage: n [options] [COMMAND] [args]
Commands:

  n                              Display downloaded node versions and install selection
  n latest                       Install the latest node release (downloading if necessary)
  n lts                          Install the latest LTS node release (downloading if necessary)
  n <version>                    Install node <version> (downloading if necessary)
  n run <version> [args ...]     Execute downloaded node <version> with [args ...]
  n which <version>              Output path for downloaded node <version>
  n exec <vers> <cmd> [args...]  Execute command with modified PATH, so downloaded node <version> and npm first
  n rm <version ...>             Remove the given downloaded version(s)
  n prune                        Remove all downloaded versions except the installed version
  n --latest                     Output the latest node version available
  n --lts                        Output the latest LTS node version available
  n ls                           Output downloaded versions
  n ls-remote [version]          Output matching versions available for download
  n uninstall                    Remove the installed node and npm

Options:

  -V, --version   Output version of n
  -h, --help      Display help information
  -q, --quiet     Disable curl output (if available)
  -d, --download  Download only
  -a, --arch      Override system architecture
  --all           ls-remote displays all matches instead of last 20
  --insecure      Turn off certificate checking for https requests (may be needed from behind a proxy server)

Aliases:

  which: bin
  run: use, as
  ls: list
  lsr: ls-remote
  rm: -
  lts: stable
  latest: current

Versions:

  Numeric version numbers can be complete or incomplete, with an optional leading 'v'.
  Versions can also be specified by label, or codename,
  and other downloadable releases by <remote-folder>/<version>

    4.9.1, 8, v6.1    Numeric versions
    lts               Newest Long Term Support official release
    latest, current   Newest official release
    boron, carbon     Codenames for release streams
    and nightly, chakracore-release/latest, rc/10 et al

• 其它命令

#执行语句  
n latest    安装最新版本  
n stable   安装稳定版本  
n rm x.x.x  删除某个版本  
n rm v8.11.3