mac Os下全局安装vue cli3.0出现的报错解决方案

摘要：直接全局安装是会出现错误错误如下这种错误提示是你没有权限将安装文件直接写入一个权限控制文件里。

直接 npm install -g @vue/cli全局安装是会出现错误

错误如下:

Last login: Tue Oct 30 23:43:58 on ttys000
asusdeMac:~ asus$ npm install -g @vue/cli
npm WARN deprecated cross-spawn-async@2.2.5: cross-spawn no longer requires a build toolchain, use it instead
npm WARN checkPermissions Missing write access to /usr/local/lib/node_modules
npm WARN apollo-link-persisted-queries@0.2.1 requires a peer of graphql@^0.11.0 || ^0.12.0 || ^0.13.0 but none is installed. You must install peer dependencies yourself.
npm WARN graphql-subscriptions@0.5.8 requires a peer of graphql@^0.10.5 || ^0.11.3 || ^0.12.0 || ^0.13.0 but none is installed. You must install peer dependencies yourself.
npm WARN @apollographql/apollo-upload-server@5.0.3 requires a peer of graphql@^0.13.1 but none is installed. You must install peer dependencies yourself.
npm WARN graphql-tools@3.1.1 requires a peer of graphql@^0.13.0 but none is installed. You must install peer dependencies yourself.
npm WARN graphql-subscriptions@0.5.8 requires a peer of graphql@^0.10.5 || ^0.11.3 || ^0.12.0 || ^0.13.0 but none is installed. You must install peer dependencies yourself.

npm ERR! path /usr/local/lib/node_modules
npm ERR! code EACCES
npm ERR! errno -13
npm ERR! syscall access
npm ERR! Error: EACCES: permission denied, access "/usr/local/lib/node_modules"
npm ERR!  { Error: EACCES: permission denied, access "/usr/local/lib/node_modules"
npm ERR!   stack: "Error: EACCES: permission denied, access "/usr/local/lib/node_modules"",
npm ERR!   errno: -13,
npm ERR!   code: "EACCES",
npm ERR!   syscall: "access",
npm ERR!   path: "/usr/local/lib/node_modules" }
npm ERR! 
npm ERR! The operation was rejected by your operating system.
npm ERR! It is likely you do not have the permissions to access this file as the current user
npm ERR! 
npm ERR! If you believe this might be a permissions issue, please double-check the
npm ERR! permissions of the file and its containing directories, or try running
npm ERR! the command again as root/Administrator (though this is not recommended).

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/asus/.npm/_logs/2018-10-31T06_48_54_915Z-debug.log

这种错误提示是你没有权限将安装文件直接写入一个权限控制文件里。

npm全局安装文件时可以使用 ‘sudo’ 任何管理员账户都可以使用sudo来获取 root 权限。

使用 sudo npm install -g @vue/cli 进行安装

1、输入安装命令后，命令提醒你输入Password密码，目的使用管理员权限去安装

Last login: Tue Oct 30 23:44:47 on ttys000
asusdeMac:~ asus$ sudo npm install -g @vue/cli

We trust you have received the usual lecture from the local System
Administrator. It usually boils down to these three things:

    #1) Respect the privacy of others.
    #2) Think before you type.
    #3) With great power comes great responsibility.

Password:

密码输入完后稍等一会儿就安装成功啦！

asusdeMac:~ asus$ sudo npm install -g @vue/cli
npm WARN deprecated cross-spawn-async@2.2.5: cross-spawn no longer requires a build toolchain, use it instead
/usr/local/bin/vue -> /usr/local/lib/node_modules/@vue/cli/bin/vue.js

> fsevents@1.2.4 install /usr/local/lib/node_modules/@vue/cli/node_modules/fsevents
> node install

[fsevents] Success: "/usr/local/lib/node_modules/@vue/cli/node_modules/fsevents/lib/binding/Release/node-v57-darwin-x64/fse.node" already installed
Pass --update-binary to reinstall or --build-from-source to recompile

> protobufjs@6.8.8 postinstall /usr/local/lib/node_modules/@vue/cli/node_modules/protobufjs
> node scripts/postinstall


> nodemon@1.18.5 postinstall /usr/local/lib/node_modules/@vue/cli/node_modules/nodemon
> node bin/postinstall || exit 0

Love nodemon? You can now support the project via the open collective:
 > https://opencollective.com/nodemon/donate

npm WARN graphql-subscriptions@0.5.8 requires a peer of graphql@^0.10.5 || ^0.11.3 || ^0.12.0 || ^0.13.0 but none is installed. You must install peer dependencies yourself.
npm WARN apollo-link-persisted-queries@0.2.1 requires a peer of graphql@^0.11.0 || ^0.12.0 || ^0.13.0 but none is installed. You must install peer dependencies yourself.
npm WARN graphql-subscriptions@0.5.8 requires a peer of graphql@^0.10.5 || ^0.11.3 || ^0.12.0 || ^0.13.0 but none is installed. You must install peer dependencies yourself.
npm WARN @apollographql/apollo-upload-server@5.0.3 requires a peer of graphql@^0.13.1 but none is installed. You must install peer dependencies yourself.
npm WARN graphql-tools@3.1.1 requires a peer of graphql@^0.13.0 but none is installed. You must install peer dependencies yourself.

+ @vue/cli@3.0.5
added 730 packages from 514 contributors in 167.036s

检测是否在全局安装成功 输入命令 vue -v

asusdeMac:~ asus$ vue -v
Usage: vue  [options]

Options:
  -V, --version                         output the version number
  -h, --help                            output usage information

Commands:
  create [options]            create a new project powered by vue-cli-service
  add  [pluginOptions]          install a plugin and invoke its generator in an already created project
  invoke  [pluginOptions]       invoke the generator of a plugin in an already created project
  inspect [options] [paths...]          inspect the webpack config in a project with vue-cli-service
  serve [options] [entry]               serve a .js or .vue file in development mode with zero config
  build [options] [entry]               build a .js or .vue file in production mode with zero config
  ui [options]                          start and open the vue-cli ui
  init [options]