npm install报错node-sass

1.node-sass安装错误

Building: C:\Program Files\nodejs\node.exe D:\gitlab\coreui\node_modules\node-gyp\bin\node-gyp.js rebuild --verbose --libsass_ext= --libsass_cflags= --libsass_ldflags= --libsass_library=
gyp info it worked if it ends with ok
gyp verb cli [ 'C:\\Program Files\\nodejs\\node.exe',
gyp verb cli   'D:\\gitlab\\coreui\\node_modules\\node-gyp\\bin\\node-gyp.js',
gyp verb cli   'rebuild',
gyp verb cli   '--verbose',
gyp verb cli   '--libsass_ext=',
gyp verb cli   '--libsass_cflags=',
gyp verb cli   '--libsass_ldflags=',
gyp verb cli   '--libsass_library=' ]
gyp info using node-gyp@3.6.2
gyp info using node@8.11.1 | win32 | x64
gyp verb command rebuild []
gyp verb command clean []
gyp verb clean removing "build" directory
gyp verb command configure []
gyp verb check python checking for Python executable "python2" in the PATH
gyp verb `which` failed Error: not found: python2
gyp verb `which` failed     at getNotFoundError (D:\gitlab\coreui\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (D:\gitlab\coreui\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (D:\gitlab\coreui\node_modules\which\which.js:80:29)
gyp verb `which` failed     at D:\gitlab\coreui\node_modules\which\which.js:89:16
gyp verb `which` failed     at D:\gitlab\coreui\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at D:\gitlab\coreui\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:152:21)
gyp verb `which` failed  python2 { Error: not found: python2
gyp verb `which` failed     at getNotFoundError (D:\gitlab\coreui\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (D:\gitlab\coreui\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (D:\gitlab\coreui\node_modules\which\which.js:80:29)
gyp verb `which` failed     at D:\gitlab\coreui\node_modules\which\which.js:89:16
gyp verb `which` failed     at D:\gitlab\coreui\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at D:\gitlab\coreui\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:152:21)
gyp verb `which` failed   stack: 'Error: not found: python2\n    at getNotFoundError (D:\\gitlab\\coreui\\node_modules\\which\\which.js:13:12)\n    at F (D:\\gitlab\\coreui\\node_modules\\which\\which.js:68:19)\n    at E (D:\\gitlab\\coreui\\node_modules\\which\\which.js:80:29)\n    at D:\\gitlab\\coreui\\node_modules\\which\\which.js:89:16\n    at D:\\gitlab\\coreui\\node_modules\\isexe\\index.js:42:5\n    at D:\\gitlab\\coreui\\node_modules\\isexe\\windows.js:36:5\n    at FSReqWrap.oncomplete (fs.js:152:21)',
gyp verb `which` failed   code: 'ENOENT' }
gyp verb check python checking for Python executable "python" in the PATH
gyp verb `which` failed Error: not found: python
gyp verb `which` failed     at getNotFoundError (D:\gitlab\coreui\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (D:\gitlab\coreui\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (D:\gitlab\coreui\node_modules\which\which.js:80:29)
gyp verb `which` failed     at D:\gitlab\coreui\node_modules\which\which.js:89:16
gyp verb `which` failed     at D:\gitlab\coreui\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at D:\gitlab\coreui\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:152:21)
gyp verb `which` failed  python { Error: not found: python
gyp verb `which` failed     at getNotFoundError (D:\gitlab\coreui\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (D:\gitlab\coreui\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (D:\gitlab\coreui\node_modules\which\which.js:80:29)
gyp verb `which` failed     at D:\gitlab\coreui\node_modules\which\which.js:89:16
gyp verb `which` failed     at D:\gitlab\coreui\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at D:\gitlab\coreui\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:152:21)
gyp verb `which` failed   stack: 'Error: not found: python\n    at getNotFoundError (D:\\gitlab\\coreui\\node_modules\\which\\which.js:13:12)\n    at F (D:\\gitlab\\coreui\\node_modules\\which\\which.js:68:19)\n    at E (D:\\gitlab\\coreui\\node_modules\\which\\which.js:80:29)\n    at D:\\gitlab\\coreui\\node_modules\\which\\which.js:89:16\n    at D:\\gitlab\\coreui\\node_modules\\isexe\\index.js:42:5\n    at D:\\gitlab\\coreui\\node_modules\\isexe\\windows.js:36:5\n    at FSReqWrap.oncomplete (fs.js:152:21)',
gyp verb `which` failed   code: 'ENOENT' }
gyp verb could not find "python". checking python launcher
gyp verb could not find "python". guessing location
gyp verb ensuring that file exists: C:\Python27\python.exe
gyp ERR! configure error
gyp ERR! stack Error: Can't find Python executable "python", you can set the PYTHON env variable.
gyp ERR! stack     at PythonFinder.failNoPython (D:\gitlab\coreui\node_modules\node-gyp\lib\configure.js:483:19)
gyp ERR! stack     at PythonFinder.<anonymous> (D:\gitlab\coreui\node_modules\node-gyp\lib\configure.js:508:16)
gyp ERR! stack     at D:\gitlab\coreui\node_modules\graceful-fs\polyfills.js:284:29
gyp ERR! stack     at FSReqWrap.oncomplete (fs.js:152:21)
gyp ERR! System Windows_NT 10.0.15063
gyp ERR! command "C:\\Program Files\\nodejs\\node.exe" "D:\\gitlab\\coreui\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
gyp ERR! cwd D:\gitlab\coreui\node_modules\node-sass
gyp ERR! node -v v8.11.1
gyp ERR! node-gyp -v v3.6.2
gyp ERR! not ok
Build failed with error code: 1
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.4 (node_modules\nodemon\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.4: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.4 (node_modules\@babel\cli\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.4: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.1.3 (node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.1.3: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! node-sass@4.9.0 postinstall: `node scripts/build.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the node-sass@4.9.0 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!     D:\Users\xu.han\AppData\Roaming\npm-cache\_logs\2018-08-02T02_10_06_664Z-debug.log

解决办法： 
主要是windows平台缺少编译环境， 
1、先运行： npm install -g node-gyp

2.缺少文件

npm WARN tar ENOENT: no such file or directory, open 'D:\gitlab\coreui\node_modules\.staging\@angular\compiler-9961a675\src\output\output_ast.js'
npm ERR! code EINTEGRITY
npm ERR! sha512-p5TCYZDAO0m4G344hD+wx/LATebLWZNkkh2asWUFqSsD2OrDNhbAHuSjobrmsUmdzjJjEeZVU9g1h3O6vpstnw== integrity checksum failed when using sha512: wanted sha512-p5TCYZDAO0m4G344hD+wx/LATebLWZNkkh2asWUFqSsD2OrDNhbAHuSjobrmsUmdzjJjEeZVU9g1h3O6vpstnw== but got sha512-CqB7ryzE35jFhgQ8WXB5S1l+BGRWnS7Kk8KRrQXXCRYTkTXnA88WgaEwHkGeQWbsF/HdsgIkDDZcylTdNUonAg==. (3345003 bytes)

npm ERR! A complete log of this run can be found in:
npm ERR!     D:\Users\xu.han\AppData\Roaming\npm-cache\_logs\2018-08-02T03_34_06_589Z-debug.log

解决办法：

首先运行npm init，然后再执行install