npm i bcrypt

新系统拉取项目，下载依赖包，其中包含 bcrypt 依赖，一直安装不成功。

已安装号 Python 3 和 Visual Studio 2019。

此类型npm库都会使用到 node-gyp ，依赖 Python 和 Visual Studio 

npm ERR! gyp info using node-gyp@8.2.0
npm ERR! gyp info using node@14.18.1 | win32 | x64
npm ERR! gyp info find Python using Python version 3.10.0 found at "C:\Program Files\Python310\python.exe"
npm ERR! gyp info find VS using VS2019 (16.11.31729.503) found at:
npm ERR! gyp info find VS "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community"
npm ERR! gyp info find VS run with --verbose for detailed information
npm ERR! gyp info spawn C:\Program Files\Python310\python.exe

最终卡在

npm ERR! gyp: Undefined variable module_name in binding.gyp while trying to load binding.gyp
npm ERR! gyp ERR! configure error
npm ERR! gyp ERR! stack Error: `gyp` failed with exit code: 1
npm ERR! gyp ERR! stack     at ChildProcess.onCpExit (C:\Users\17212\AppData\Roaming\npm\node_modules\npm\node_modules\node-gyp\lib\configure.js:353:16)
npm ERR! gyp ERR! stack     at ChildProcess.emit (events.js:400:28)
npm ERR! gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:282:12)

尝试过清缓存，重装，没用。

npm cache clean -f
npm uninstall node-gyp -g
npm install node-gyp -g

使用，还是没用

再次尝试，没效果。还是使用了Python 3，卸载了Python 3，程序报错Python2不适用，必须要Python 3。

npm config set python C:\Python27\python.exe

安装 Visual Studio 2017，设置 2017 ，也没用。

npm config set msvs_version 2017 --global

最后到用户目录删除了文件重新安装，成功了。

删除文件：C:\Users\***\AppData\Roaming\npm-cache、C:\Users\***\AppData\Roaming\npm\node_modules\npm、C:\Users\***\AppData\Roaming\npm\node_modules\node-gyp

只剩下了先前安装的 windows-build-tools（使用了管理员shell安装）

> bcrypt@5.0.1 install E:\workspace\cargo-mongo\node_modules\bcrypt
> node-pre-gyp install --fallback-to-build

node-pre-gyp ERR! install request to https://github.com/kelektiv/node.bcrypt.js/releases/download/v5.0.1/bcrypt_lib-v5.0.1-napi-v3-win32-x64-unknown.tar.gz failed, reason: read ECONNRESET 
node-pre-gyp WARN Pre-built binaries not installable for bcrypt@5.0.1 and node@14.18.1 (node-v83 ABI, unknown) (falling back to source compile with node-gyp) 
node-pre-gyp WARN Hit error request to https://github.com/kelektiv/node.bcrypt.js/releases/download/v5.0.1/bcrypt_lib-v5.0.1-napi-v3-win32-x64-unknown.tar.gz failed, reason: read ECONNRESET 
在此解决方案中一次生成一个项目。若要启用并行生成，请添加“/m”开关。
  nothing.c
  win_delay_load_hook.cc
  nothing.vcxproj -> E:\workspace\cargo-mongo\node_modules\bcrypt\build\Release\\nothing.lib
  blowfish.cc
  bcrypt.cc
  bcrypt_node.cc
  win_delay_load_hook.cc
    正在创建库 E:\workspace\cargo-mongo\node_modules\bcrypt\build\Release\bcrypt_lib.lib 和对象 E:\workspace\cargo-mongo\node_modules\bcrypt\build\Releas
  e\bcrypt_lib.exp
  bcrypt_lib.vcxproj -> E:\workspace\cargo-mongo\node_modules\bcrypt\build\Release\\bcrypt_lib.node
  Copying E:\workspace\cargo-mongo\node_modules\bcrypt\build\Release\/bcrypt_lib.node to E:/workspace/cargo-mongo/node_modules/bcrypt/lib/binding
  /napi-v3\bcrypt_lib.node
  已复制         1 个文件。

> nodemon@1.19.4 postinstall E:\workspace\cargo-mongo\node_modules\nodemon
> node bin/postinstall || exit 0

Love nodemon? You can now support the project via the open collective:
 > https://opencollective.com/nodemon/donate

npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.13 (node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.13: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})

+ bcrypt@5.0.1
added 46 packages from 110 contributors and updated 411 packages in 100.985s

18 packages are looking for funding
  run `npm fund` for details

感觉本次可能是 管理员权限打开powershell 运行 

npm install --global --production windows-build-tools

在起作用。但是其他的尝试可能会在其他时候适用。

bcrypt 仓库文档安装说明地址。