前几天新接到一个react项目，拿到手开始搭建本地的环境，但是环境总是搭建不成功，出现各种各样的问题；
最开始是以为这个是因为之前的项目开发是mac系统进行的，而自己现在使用的系统是windows，所以出现的部分文件的兼容的问题，但是后来发现不是这个原因造成，继续寻找其他的原因；
在调试很长时间无果之后，开始重新逐个安装项目依赖包，因为毕竟这个项目是很早之前的，所以可能会出现这种问题，在重新安装依赖后，又出现了新的问题，而且是一个非常奇葩的问题，window对象找不到，这就令人无语了；
令人崩溃的尝试后，用了同事的mac系统暂时解决了急需修改的 bug，之后从他那里拷来了修改之后的项目，这次重新安装依赖包后发现项目已经能够在本地跑起来了，此时的心理有一晚句mmp在奔腾。
既然项目能够跑通说明之前的问题都是不正确的，最终经过排除，发现了问题出现的原因，node-sass版本，之前虽然重新安装了node-sass，但是依旧存在问题：在使用npm i 之后给出的报错信息如下
[email protected] preinstall C:\Users\Dell\Desktop\demoProject\node_modules\extract-opts\node_modules\typechecker > node ./cyclic.js > [email protected] preinstall C:\Users\Dell\Desktop\demoProject\node_modules\extendr\node_modules\typechecker > node ./cyclic.js > [email protected] install C:\Users\Dell\Desktop\demoProject\node_modules\node-sass > node scripts/install.js Downloading binary from https://github.com/sass/node-sass/releases/download/v3.13.1/win32-x64-57_binding.node Cannot download "https://github.com/sass/node-sass/releases/download/v3.13.1/win32-x64-57_binding.node": HTTP error 404 Not Found Hint: If github.com is not accessible in your location try setting a proxy via HTTP_PROXY, e.g. export HTTP_PROXY=http://example.com:1234 or configure npm proxy via npm config set proxy http://example.com:8080 > [email protected] install C:\Users\Dell\Desktop\demoProject\node_modules\pre-commit > node install.js pre-commit: pre-commit: Detected an existing git pre-commit hook pre-commit: Old pre-commit hook backuped to pre-commit.old pre-commit: > [email protected] postinstall C:\Users\Dell\Desktop\demoProject\node_modules\spawn-sync > node postinstall > [email protected] postinstall C:\Users\Dell\Desktop\demoProject\node_modules\node-sass > node scripts/build.js Building: C:\Program Files\nodejs\node.exe C:\Users\Dell\Desktop\demoProject\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 'C:\\Users\\Dell\\Desktop\\demoProject\\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 [email protected] gyp info using [email protected] | 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 (C:\Users\Dell\Desktop\demoProject\node_modules\which\which.js:13:12) gyp verb `which` failed at F (C:\Users\Dell\Desktop\demoProject\node_modules\which\which.js:68:19) gyp verb `which` failed at E (C:\Users\Dell\Desktop\demoProject\node_modules\which\which.js:80:29) gyp verb `which` failed at C:\Users\Dell\Desktop\demoProject\node_modules\which\which.js:89:16 gyp verb `which` failed at C:\Users\Dell\Desktop\demoProject\node_modules\isexe\index.js:42:5 gyp verb `which` failed at C:\Users\Dell\Desktop\demoProject\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 (C:\Users\Dell\Desktop\demoProject\node_modules\which\which.js:13:12) gyp verb `which` failed at F (C:\Users\Dell\Desktop\demoProject\node_modules\which\which.js:68:19) gyp verb `which` failed at E (C:\Users\Dell\Desktop\demoProject\node_modules\which\which.js:80:29) gyp verb `which` failed at C:\Users\Dell\Desktop\demoProject\node_modules\which\which.js:89:16 gyp verb `which` failed at C:\Users\Dell\Desktop\demoProject\node_modules\isexe\index.js:42:5 gyp verb `which` failed at C:\Users\Dell\Desktop\demoProject\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 (C:\\Users\\Dell\\Desktop\\demoProject\\node_modules\\which\\which.js:13:12)\n at F (C:\\Users\\Dell\\Desktop\\demoProject\\node_modules\\which\\which.js:68:19)\n at E (C:\\Users\\Dell\\Desktop\\demoProject\\node_modules\\which\\which.js:80:29)\n at C:\\Users\\Dell\\Desktop\\demoProject\\node_modules\\which\\which.js:89:16\n at C:\\Users\\Dell\\Desktop\\demoProject\\node_modules\\isexe\\index.js:42:5\n at C:\\Users\\Dell\\Desktop\\demoProject\\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` succeeded python C:\Users\Dell\AppData\Local\Programs\Python\Python35-32\python.EXE gyp verb check python version `C:\Users\Dell\AppData\Local\Programs\Python\Python35-32\python.EXE -c "import platform; print(platform.python_version());"` returned: "3.5.2\r\n" gyp verb could not find "C:\Users\Dell\AppData\Local\Programs\Python\Python35-32\python.EXE". checking python launcher gyp verb could not find "C:\Users\Dell\AppData\Local\Programs\Python\Python35-32\python.EXE". 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 "C:\Users\Dell\AppData\Local\Programs\Python\Python35-32\python.EXE", you can set the PYTHON env variable. gyp ERR! stack at PythonFinder.failNoPython (C:\Users\Dell\Desktop\demoProject\node_modules\node-gyp\lib\configure.js:483:19) gyp ERR! stack at PythonFinder.<anonymous> (C:\Users\Dell\Desktop\demoProject\node_modules\node-gyp\lib\configure.js:508:16) gyp ERR! stack at C:\Users\Dell\Desktop\demoProject\node_modules\graceful-fs\polyfills.js:284:29 gyp ERR! stack at FSReqWrap.oncomplete (fs.js:152:21) gyp ERR! System Windows_NT 10.0.16299 gyp ERR! command "C:\\Program Files\\nodejs\\node.exe" "C:\\Users\\Dell\\Desktop\\demoProject\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library=" gyp ERR! cwd C:\Users\Dell\Desktop\demoProject\node_modules\node-sass gyp ERR! node -v v8.9.1 gyp ERR! node-gyp -v v3.6.2 gyp ERR! not ok Build failed with error code: 1 npm WARN [email protected] requires a peer of webpack@^2.0.0 || ^3.0.0 but none is installed. You must install peer dependencies yourself. npm WARN [email protected] No repository field. npm WARN optional SKIPPING OPTIONAL DEPENDENCY: [email protected] (node_modules\fsevents): npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for [email protected]: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"}) npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! [email protected] postinstall: `node scripts/build.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.
嗯，总算是发现了问题的所在，那么这样的话，就能处理了；
处理的方式有很多种，在这里我说一下我处理的方式，刚开始是直接下载其他版本，但是问题依旧存在，最后处理的方式就是：
打开当前的项目的package.json文件，找到devDependencies对象，删除里面的node-sass对应的键值对，然后重新在终端npm i node-sass/cnpm i node-sass
这样重新跑一下项目，ok，问题解决了；