使用最新的 node v12 安装 electron 时，发现每次跑到下面的语句就会挂住，无法继续安装：
> [email protected] postinstall /Users/cxf/Dev/CapsIndicator/node_modules/electron
> node install.js
查看网上相关解决方案，发现是因为 npm 需要连接 github 下载 electron 安装包导致，安装包有 60M 左右，但从 github 下载却只有几 KB，所以感觉是卡住了。但改使用淘宝的 cnpm 发现还是会卡住，这是因为 electron 的包默认还是指向 github 下载，还有 electron 提供了修改下载地址的环境变量electron_mirror，使用npm config设置配置变量
npm config set electron_mirror "https://npm.taobao.org/mirrors/electron/"
再次执行安装命令，虽然不会卡住了，但变为直接提示404安装失败：
> [email protected] postinstall /Users/cxf/Dev/CapsIndicator/node_modules/electron
> node install.js
(node:2216) UnhandledPromiseRejectionWarning: HTTPError: Response code 404 (Not Found)
at EventEmitter.<anonymous> (/Users/cxf/Dev/CapsIndicator/node_modules/got/source/as-stream.js:35:24)
at EventEmitter.emit (events.js:210:5)
at module.exports (/Users/cxf/Dev/CapsIndicator/node_modules/got/source/get-response.js:22:10)
at ClientRequest.handleResponse (/Users/cxf/Dev/CapsIndicator/node_modules/got/source/request-as-event-emitter.js:155:5)
at Object.onceWrapper (events.js:300:26)
at ClientRequest.emit (events.js:215:7)
at ClientRequest.origin.emit (/Users/cxf/Dev/CapsIndicator/node_modules/@szmarczak/http-timer/source/index.js:37:11)
at HTTPParser.parserOnIncomingClient [as onIncoming] (_http_client.js:583:27)
at HTTPParser.parserOnHeadersComplete (_http_common.js:115:17)
at TLSSocket.socketOnData (_http_client.js:456:22)
(node:2216) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:2216) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
npm WARN [email protected] license should be a valid SPDX license expression
查看 github issue#1050 后，发现是因为淘宝保存的版本目录和官方的不同，淘宝去掉了v前缀。
// 官方
https://npm.taobao.org/mirrors/electron/v7.1.7/electron-v7.1.7-linux-x64.zip
// 淘宝
https://npm.taobao.org/mirrors/electron/7.1.7/electron-v7.1.7-linux-x64.zip
好在 electron 官方也提供了修改目录名称的环境变量electron_custom_dir，配置改下：
npm config set electron_custom_dir "7.1.7"
再次运行安装命令，这次终于成功了😂
官方相关的安装说明：
