npm install 报错，提示`gyp ERR! stack Error: EACCES: permission denied` 解决方法

npm install 报错，提示gyp ERR! stack Error: EACCES: permission denied，下面是具体情况

> [email protected] install /www/server/yapi/vendors/node_modules/dtrace-provider
> node-gyp rebuild || node suppress-error.js

gyp WARN EACCES user "root" does not have permission to access the dev dir "/root/.node-gyp/10.15.3"
gyp WARN EACCES attempting to reinstall using temporary dev dir "/www/server/yapi/vendors/node_modules/dtrace-provider/.node-gyp"
gyp WARN install got an error, rolling back install
gyp WARN install got an error, rolling back install
gyp ERR! configure error 
gyp ERR! stack Error: EACCES: permission denied, mkdir '/www/server/yapi/vendors/node_modules/dtrace-provider/.node-gyp'
gyp ERR! System Linux 3.10.0-514.26.2.el7.x86_64
gyp ERR! command "/usr/local/src/node-v10.15.3-linux-x64/bin/node" "/usr/local/src/node-v10.15.3-linux-x64/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /www/server/yapi/vendors/node_modules/dtrace-provider
gyp ERR! node -v v10.15.3
gyp ERR! node-gyp -v v3.8.0
gyp ERR! not ok 

> [email protected] postinstall /www/server/yapi/vendors/node_modules/core-js
> node scripts/postinstall || echo "ignore"

Thank you for using core-js ( https://github.com/zloirock/core-js ) for polyfilling JavaScript standard library!

The project needs your help! Please consider supporting of core-js on Open Collective or Patreon: 
> https://opencollective.com/core-js 
> https://www.patreon.com/zloirock 

Also, the author of core-js ( https://github.com/zloirock ) is looking for a good job -)


> [email protected] postinstall /www/server/yapi/vendors/node_modules/jsonpath
> node lib/aesprim.js > generated/aesprim-browser.js

sh: generated/aesprim-browser.js: Permission denied
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] postinstall: `node lib/aesprim.js > generated/aesprim-browser.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the [email protected] postinstall script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /root/.npm/_logs/2019-06-05T15_08_06_583Z-debug.log

猜测可能是因为没有权限读写，ls -la看下文件权限设置情况

[root@root vendors]# ls -la
drwxr-xr-x 307 root root  12288 Jun  5 23:08 node_modules
-rwxr-xr-x   1 root root   5880 Jun  5 23:06 package.json
-rw-r--r--   1 root root 900847 Jun  5 23:06 package-lock.json

只有root用户组有读写权限，其他只读，将node_modules文件夹修改权限，再执行看看

[root@root vendors]# npm i --production

> [email protected] postinstall /www/server/yapi/vendors/node_modules/jsonpath
> node lib/aesprim.js > generated/aesprim-browser.js

sh: generated/aesprim-browser.js: Permission denied
npm WARN [email protected] requires a peer of mongoose@^4.1.12 but none is installed. You must install peer dependencies yourself.

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] postinstall: `node lib/aesprim.js > generated/aesprim-browser.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the [email protected] postinstall script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /root/.npm/_logs/2019-06-05T15_10_22_303Z-debug.log

经过面向搜索引擎开发，有提到用sudo，但是发现还是不行，实际原因是由于用的是root账户权限执行npm，而npm默认是不适用root权限创建内容，因此会出现权限问题而导致失败，加上参数--unsafe-perm=true --allow-root即可解决问题。

npm install --production --unsafe-perm=true --allow-root