解决electron打包时下载nsis等依赖慢的问题

初次学习使用Electron，在打包第一个入门应用时就出现了老大难的问题，npm run package命令在运行时会去下载github的资源（如nsis、winCodeSign等），但是这个速度可就太感人。慢就不说了，最后还赤果果的用一大串红字告诉我打包失败。
报错信息如下：

[0] npm run build:main exited with code 0
[1] npm run build:renderer exited with code 0
  • electron-builder  version=22.13.1 os=10.0.19043
  • loaded configuration  file=package.json ("build" field)
  • writing effective config  file=release\build\builder-effective-config.yaml
  • installing production dependencies  platform=win32 arch=x64 appDir=D:\Code\Electron\test\release\app
  • packaging       platform=win32 arch=x64 electron=16.0.5 appOutDir=release\build\win-unpacked
  • building        target=nsis file=release\build\ElectronReact Setup 4.5.0.exe archs=x64 oneClick=true perMachine=false
  • downloading     url=https://github.com/electron-userland/electron-builder-binaries/releases/download/nsis-3.0.4.2/nsis-3.0.4.2.7z size=1.4 MB parts=1
  • retrying        attempt=1
  • retrying        attempt=2
  • retrying        attempt=3
  ⨯ part download request failed with status code 401
github.com/develar/app-builder/pkg/download.(*Part).doRequest
        /Volumes/data/Documents/app-builder/pkg/download/Part.go:126
github.com/develar/app-builder/pkg/download.(*Part).download
        /Volumes/data/Documents/app-builder/pkg/download/Part.go:67
github.com/develar/app-builder/pkg/download.(*Downloader).DownloadResolved.func1.1
        /Volumes/data/Documents/app-builder/pkg/download/downloader.go:155
github.com/develar/app-builder/pkg/util.MapAsyncConcurrency.func2
        /Volumes/data/Documents/app-builder/pkg/util/async.go:68
runtime.goexit
        /usr/local/Cellar/go/1.16.5/libexec/src/runtime/asm_amd64.s:1371
  ⨯ D:\Code\Electron\test\node_modules\app-builder-bin\win\x64\app-builder.exe exited with code ERR_ELECTRON_BUILDER_CANNOT_EXECUTE  failedTask=build stackTrace=Error: D:\Code\Electron\test\node_modules\app-builder-bin\win\x64\app-builder.exe exited with code ERR_ELECTRON_BUILDER_CANNOT_EXECUTE

问题就出在下载github资源太慢了，而cnpm是提供了对应的镜像源的，所以解决办法也挺简单，设置ELECTRON_BUILDER_BINARIES_MIRROR镜像源地址就行了，即修改 C:\Users\你的用户名\.npmrc 文件（如果没有该文件就直接创建）,加入如下代码：

registry=https://registry.npm.taobao.org/
electron_mirror=https://npm.taobao.org/mirrors/electron/
isturl=https://npm.taobao.org/mirrors/node
ELECTRON_BUILDER_BINARIES_MIRROR=http://npm.taobao.org/mirrors/electron-builder-binaries/
ELECTRON_MIRROR=https://npm.taobao.org/mirrors/electron/

注:ELECTRON_BUILDER_BINARIES_MIRROR的地址可以改成https的试试。

然后再去运行npm run package，发现download部分很快就过去了，程序包也打好了，喜极而泣。