Mac安装yarn并配置环境变量PATH，运行报错问题解决

// 切换root权限
sudo -s
// 输入密码
password:
// 编辑bash_profile文件
vi ./bash_profile
// 按s键进行编辑，添加以下配置
export PATH="$PATH:/usr/local/bin/yarn"
// 按control+c保存修改，输入:wq退出编辑

    at Object.openSync (fs.js:461:3)
    at readFileSync (fs.js:364:35)
    at /usr/local/lib/node_modules/yarn/lib/cli.js:101331:58
    at Array.map (<anonymous>)
    at parseRcPaths (/usr/local/lib/node_modules/yarn/lib/cli.js:101329:78)
    at Object.findRc (/usr/local/lib/node_modules/yarn/lib/cli.js:101343:10)
    at getRcConfigForCwd (/usr/local/lib/node_modules/yarn/lib/cli.js:56915:74)
    at /usr/local/lib/node_modules/yarn/lib/cli.js:92694:56
    at Generator.next (<anonymous>)
    at step (/usr/local/lib/node_modules/yarn/lib/cli.js:310:30)

sudo chown -R $USER:$GROUP ~/.config