产生场景
通常，下载 electron 的时候我们都会指定下载源，一般我们都是使用 .npmrc 文件或者 .yarnrc 文件来配置，如下所示：
.npmrc文件配置：
home="https://npmmirror.com" registry="https://registry.npmmirror.com/" electron_mirror="https://npmmirror.com/mirrors/electron/" electron_builder_binaries_mirror="http://npmmirror.com/mirrors/electron-builder-binaries/"点击复制复制失败已复制
.yarnrc文件配置
home "https://npmmirror.com" registry "https://registry.npmmirror.com/" disturl "https://npmmirror.com/dist" electron_mirror "https://cdn.npmmirror.com/binaries/electron/" electron_builder_binaries_mirror "http://npmmirror.com/mirrors/electron-builder-binaries/"点击复制复制失败已复制
我们的Electron桌面应用是使用vue cli中的electron builder插件来实现的，依赖包版本如下：
- vue
3.x - vue cli electron builder
2.1.1 - electron
13.x
运行时没问题，但是遇到打包的时候就出现了问题，如下所示：
To ensure your native dependencies are always matched electron version, simply add script `"postinstall": "electron-builder install-app-deps" to your `package.json` • writing effective config file=dist_electron\builder-effective-config.yaml • packaging platform=win32 arch=x64 electron=13.6.3 appOutDir=dist_electron\win-unpacked ⨯ cannot resolve https://npmmirror.com/mirrors/electron/13.6.3/electron-v13.6.3-win32-x64.zip: status code 404 github.com/develar/app-builder/pkg/download.(*Downloader).follow /Volumes/data/Documents/app-builder/pkg/download/downloader.go:237 github.com/develar/app-builder/pkg/download.(*Downloader).DownloadNoRetry /Volumes/data/Documents/app-builder/pkg/download/downloader.go:128 github.com/develar/app-builder/pkg/download.(*Downloader).Download /Volumes/data/Documents/app-builder/pkg/download/downloader.go:112 github.com/develar/app-builder/pkg/electron.(*ElectronDownloader).doDownload /Volumes/data/Documents/app-builder/pkg/electron/electronDownloader.go:192 github.com/develar/app-builder/pkg/electron.(*ElectronDownloader).Download /usr/local/Cellar/go/1.16.5/libexec/src/runtime/asm_amd64.s:1371 ExecError: E:\code\Thermostat3\mock-tool\node_modules\.pnpm\app-builder-bin@3.7.1\node_modules\app-builder-bin\win\x64\app-builder.exe exited with code ERR_ELECTRON_BUILDER_CANNOT_EXECUTE at ChildProcess.<anonymous> (E:\code\Thermostat3\mock-tool\node_modules\.pnpm\builder-util@22.14.5\node_modules\builder-util\src\util.ts:250:14) at Object.onceWrapper (node:events:640:26) at ChildProcess.emit (node:events:520:28) at ChildProcess.cp.emit (E:\code\Thermostat3\mock-tool\node_modules\.pnpm\cross-spawn@7.0.3\node_modules\cross-spawn\lib\enoent.js:34:29) at maybeClose (node:internal/child_process:1092:16) at Process.ChildProcess._handle.onexit (node:internal/child_process:302:5) { exitCode: 1, alreadyLogged: false, code: 'ERR_ELECTRON_BUILDER_CANNOT_EXECUTE'点击复制复制失败已复制
问题定位
从错误信息中可以看到，错误产生的原因是 https://npmmirror.com/mirrors/electron/13.6.3/electron-v13.6.3-win32-x64.zip 文件找不到。最终发现这个 URL 不正确，正确的 URL 是： https://npmmirror.com/mirrors/electron/v13.6.3/electron-v13.6.3-win32-x64.zip 。
这个问题在 Electron 网站上已经有了说明，相关官方文档
解决方案
基于官方文档，可以有以下两种解决办法：
直接修改 ELECTRON_MIRROR 地址
.npmrc文件配置：
home="https://npmmirror.com" registry="https://registry.npmmirror.com/" electron_mirror="https://npmmirror.com/mirrors/electron/v" electron_builder_binaries_mirror="http://npmmirror.com/mirrors/electron-builder-binaries/"点击复制复制失败已复制
.yarnrc文件配置
home "https://npmmirror.com" registry "https://registry.npmmirror.com/" disturl "https://npmmirror.com/dist" electron_mirror "https://cdn.npmmirror.com/binaries/electron/v" electron_builder_binaries_mirror "http://npmmirror.com/mirrors/electron-builder-binaries/"点击复制复制失败已复制
增加 ELECTRON_CUSTOM_DIR 变量
.npmrc文件配置：
home="https://npmmirror.com" registry="https://registry.npmmirror.com/" electron_mirror="https://npmmirror.com/mirrors/electron/" electron_custom_dir="v{{ version }}" electron_builder_binaries_mirror="http://npmmirror.com/mirrors/electron-builder-binaries/"点击复制复制失败已复制
.yarnrc文件配置
home "https://npmmirror.com" registry "https://registry.npmmirror.com/" disturl "https://npmmirror.com/dist" electron_mirror "https://cdn.npmmirror.com/binaries/electron/" electron_custom_dir "v{{ version }}" electron_builder_binaries_mirror "http://npmmirror.com/mirrors/electron-bu
