很懵由缆！感覺很突然，之前還是好用的 最近在npm install之后項目就不能運行了谓厘。【具體造成的原因還不知道（難道是因為node\npm升級了導致寸谜？）竟稳，希望有遇到的大胸弟能指點一二】

問題：

異常如下（這還是縮減版【手動笑哭.png】）

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 (F:\company_project\xiexin\trunk\app\xxsdapp\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (F:\company_project\xiexin\trunk\app\xxsdapp\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (F:\company_project\xiexin\trunk\app\xxsdapp\node_modules\which\which.js:80:29)
gyp verb `which` failed     at F:\company_project\xiexin\trunk\app\xxsdapp\node_modules\which\which.js:89:16
gyp verb `which` failed     at F:\company_project\xiexin\trunk\app\xxsdapp\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at F:\company_project\xiexin\trunk\app\xxsdapp\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:154:21)
gyp verb `which` failed  python2 { Error: not found: python2
gyp verb `which` failed     at getNotFoundError (F:\company_project\xiexin\trunk\app\xxsdapp\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (F:\company_project\xiexin\trunk\app\xxsdapp\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (F:\company_project\xiexin\trunk\app\xxsdapp\node_modules\which\which.js:80:29)
gyp verb `which` failed     at F:\company_project\xiexin\trunk\app\xxsdapp\node_modules\which\which.js:89:16
gyp verb `which` failed     at F:\company_project\xiexin\trunk\app\xxsdapp\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at F:\company_project\xiexin\trunk\app\xxsdapp\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:154:21)
gyp verb `which` failed   stack:
gyp verb `which` failed    'Error: not found: python2\n    at getNotFoundError (F:\\company_project\\xiexin\\trunk\\app\\xxsdapp\\node_modules\\which\\which.js:13:12)\n    at F (F:\\com
pany_project\\xiexin\\trunk\\app\\xxsdapp\\node_modules\\which\\which.js:68:19)\n    at E (F:\\company_project\\xiexin\\trunk\\app\\xxsdapp\\node_modules\\which\\which.js:80:29)\n    at
 F:\\company_project\\xiexin\\trunk\\app\\xxsdapp\\node_modules\\which\\which.js:89:16\n    at F:\\company_project\\xiexin\\trunk\\app\\xxsdapp\\node_modules\\isexe\\index.js:42:5\n
at F:\\company_project\\xiexin\\trunk\\app\\xxsdapp\\node_modules\\isexe\\windows.js:36:5\n    at FSReqWrap.oncomplete (fs.js:154:21)',
gyp verb `which` failed   code: 'ENOENT' }
gyp verb check python checking for Python executable "python" in the PATH
gyp verb `which` succeeded python C:\Python27\python.EXE
gyp verb check python version `C:\Python27\python.EXE -c "import sys; print "2.7.15
gyp verb check python version .%s.%s" % sys.version_info[:3];"` returned: %j
gyp verb get node dir no --target version specified, falling back to host node version: 10.15.0
gyp verb command install [ '10.15.0' ]
gyp verb install input version string "10.15.0"
gyp verb install installing version: 10.15.0
gyp verb install --ensure was passed, so won't reinstall if already installed
gyp verb install version is already installed, need to check "installVersion"
gyp verb got "installVersion" 9
gyp verb needs "installVersion" 9
gyp verb install version is good
gyp verb get node dir target node version installed: 10.15.0
gyp verb build dir attempting to create "build" dir: F:\company_project\xiexin\trunk\app\xxsdapp\node_modules\node-sass\build
gyp verb build dir "build" dir needed to be created? F:\company_project\xiexin\trunk\app\xxsdapp\node_modules\node-sass\build
gyp verb Not using VS2017: Could not use PowerShell to find VS2017
gyp verb build/config.gypi creating config file
gyp verb build/config.gypi writing out config file: F:\company_project\xiexin\trunk\app\xxsdapp\node_modules\node-sass\build\config.gypi
gyp verb config.gypi checking for gypi file: F:\company_project\xiexin\trunk\app\xxsdapp\node_modules\node-sass\config.gypi
gyp verb common.gypi checking for gypi file: F:\company_project\xiexin\trunk\app\xxsdapp\node_modules\node-sass\common.gypi
gyp verb gyp gyp format was not specified; forcing "msvs"
gyp info spawn C:\Python27\python.EXE
gyp info spawn args [ 'F:\\company_project\\xiexin\\trunk\\app\\xxsdapp\\node_modules\\node-Dnode_gyp_dir=F:\\company_project\\xiexin\\trunk\\app\\xxsdapp\\node_modules\\node-gyp',
gyp info spawn args   '-Dnode_lib_file=C:\\Users\\curry\\.node-gyp\\10.15.0\\<(target_arch)\\node.lib',

在此解決方案中一次生成一個項目。若要啟用并行生成，請?zhí)砑印?m”開關他爸。
生成啟動時間為 2019/2/21 9:56:01聂宾。
節(jié)點 1 上的項目“F:\company_project\xiexin\trunk\app\xxsdapp\node_modules\node-sass\build\binding.sln”(默認目標)。
ValidateSolutionConfiguration:
  正在生成解決方案配置“Release|x64”诊笤。
MSBUILD : error MSB3428: 未能加載 Visual C++ 組件“VCBuild.exe”系谐。要解決此問題，1) 安裝 .NET Framework 2.0 SDK盏混；2) 安裝 Microsoft Visual Studio 2005；或 3) 如果將該組件安裝到了其他位置
惜论，請將其位置添加到系統(tǒng)路徑中许赃。 [F:\company_project\x
iexin\trunk\app\xxsdapp\node_modules\node-sass\build\binding.sln]
已完成生成項目“F:\company_project\xiexin\trunk\app\xxsdapp\node_modules\node-sass\build\binding.sln”(默認目標)的操作 - 失敗。


生成失敗馆类。

“F:\company_project\xiexin\trunk\app\xxsdapp\node_modules\node-sass\build\binding.sln”(默認目標) (1) ->
(_src_\libsass 目標) -> 
  MSBUILD : error MSB3428: 未能加載 Visual C++ 組件“VCBuild.exe”混聊。要解決此問題，1) 安裝 .NET Framework 2.0 SDK乾巧；2) 安裝 Microsoft Visual Studio 2005句喜；或 3) 如果將該組件安裝到了其他位
置，請將其位置添加到系統(tǒng)路徑中沟于。 [F:\company_project
\xiexin\trunk\app\xxsdapp\node_modules\node-sass\build\binding.sln]

    0 個警告
    1 個錯誤

已用時間 00:00:00.27
gyp ERR! build error
gyp ERR! stack Error: `C:\Windows\Microsoft.NET\Framework\v4.0.30319\msbuild.exe` failed with exit code: 1
gyp ERR! stack     at ChildProcess.onExit (F:\company_project\xiexin\trunk\app\xxsdapp\node_modules\node-gyp\lib\build.js:262:23)
gyp ERR! stack     at ChildProcess.emit (events.js:182:13)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:240:12)
gyp ERR! System Windows_NT 6.1.7601
gyp ERR! command "C:\\Program Files\\nodejs\\node.exe" "F:\\company_project\\xiexin\\trunk\\app\\xxsdapp\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild" "--verbose" "--libsass_ext=
" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
gyp ERR! cwd F:\company_project\xiexin\trunk\app\xxsdapp\node_modules\node-sass
gyp ERR! node -v v10.15.0
gyp ERR! node-gyp -v v3.8.0
gyp ERR! not ok

看到這異常咳胃，內心N只***。但是異常還是能看懂的旷太。

• 首先 python找不到展懈；
• 其次 很明顯的中文提示： 未能加載 Visual C++ 組件“VCBuild.exe”；
• 最終都是與 gyp...有關的（之前從沒有注意到這個插件供璧，也不記得安裝過此插件 ·_·）

解決：

通過科學地搜索node-gyp, 發(fā)現(xiàn)github有詳細安裝此工具的步驟存崖。github地址

此處僅列出Window環(huán)境安裝：

• 安裝gyp命令 npm install -g node-gyp （項目莫名的已有此插件，跳過）;
• 安裝Visual C ++構建環(huán)境：Visual Studio構建工具
• 安裝Python 2.7（v3.x.x不支持）睡毒，安裝后要配置環(huán)境變量来惧。成功后執(zhí)行npm config set python python2.7
• 執(zhí)行 npm config set msvs_version 2017

上述步驟全部執(zhí)行且成功后，項目恢復如初演顾。