前言

在项目中我们依赖了cypress，在跑ci/cd时，时常遇到超时错误。

最终定位问题，我们发现时这个cypress插件会自己下载二进制版本，或者直接超时。

排查错误

毫无疑问，我们一开始就定位到了网络问题。
并且也通过日志定位了到了这个问题

.../cypress@9.7.0/node_modules/cypress postinstall$ node index.js --exec install
.../cypress@9.7.0/node_modules/cypress postinstall: Installing Cypress (version: 9.7.0)
.../cypress@9.7.0/node_modules/cypress postinstall: [STARTED] Task without title.
.../cypress@9.7.0/node_modules/cypress postinstall: [FAILED] The Cypress App could not be downloaded.
.../cypress@9.7.0/node_modules/cypress postinstall: [FAILED] 
.../cypress@9.7.0/node_modules/cypress postinstall: [FAILED] Does your workplace require a proxy to be used to access the Internet? If so, you must configure the HTTP_PROXY environment variable before downloading Cypress. Read more: https://on.cypress.io/proxy-configuration
.../cypress@9.7.0/node_modules/cypress postinstall: [FAILED] 
.../cypress@9.7.0/node_modules/cypress postinstall: [FAILED] Otherwise, please check network connectivity and try again:
.../cypress@9.7.0/node_modules/cypress postinstall: [FAILED] 
.../cypress@9.7.0/node_modules/cypress postinstall: [FAILED] ----------
.../cypress@9.7.0/node_modules/cypress postinstall: [FAILED] 
.../cypress@9.7.0/node_modules/cypress postinstall: [FAILED] URL: https://download.cypress.io/desktop/9.7.0?platform=linux&arch=x64
.../cypress@9.7.0/node_modules/cypress postinstall: [FAILED] Error: read ETIMEDOUT
.../cypress@9.7.0/node_modules/cypress postinstall: [FAILED] 
.../cypress@9.7.0/node_modules/cypress postinstall: [FAILED] ----------
.../cypress@9.7.0/node_modules/cypress postinstall: [FAILED] 
.../cypress@9.7.0/node_modules/cypress postinstall: [FAILED] Platform: linux-x64 (Debian - 10.11)
.../cypress@9.7.0/node_modules/cypress postinstall: [FAILED] Cypress Version: 9.7.0
.../cypress@9.7.0/node_modules/cypress postinstall: The Cypress App could not be downloaded.
.../cypress@9.7.0/node_modules/cypress postinstall: Does your workplace require a proxy to be used to access the Internet? If so, you must configure the HTTP_PROXY environment variable before downloading Cypress. Read more: https://on.cypress.io/proxy-configuration
.../cypress@9.7.0/node_modules/cypress postinstall: Otherwise, please check network connectivity and try again:
.../cypress@9.7.0/node_modules/cypress postinstall: ----------
.../cypress@9.7.0/node_modules/cypress postinstall: URL: https://download.cypress.io/desktop/9.7.0?platform=linux&arch=x64
.../cypress@9.7.0/node_modules/cypress postinstall: Error: read ETIMEDOUT
.../cypress@9.7.0/node_modules/cypress postinstall: ----------
.../cypress@9.7.0/node_modules/cypress postinstall: Platform: linux-x64 (Debian - 10.11)
.../cypress@9.7.0/node_modules/cypress postinstall: Cypress Version: 9.7.0
.../cypress@9.7.0/node_modules/cypress postinstall: Failed
 ELIFECYCLE  Command failed with exit code 1.

当然，比较简单的办法就是给服务器开通网络代理，不过，出于安全问题，不允采用。

通过查看cypress的官方文档，也得知了几种方案

• 跳过安装
• 缓存
• CDN
• 镜像

社区论坛上反馈 cypress 的版本检查程序有问题，可以通过固定版本号来绕开一部分超时错误

当然比较实在的就是跳过和缓存，缓存的话，可以参考我的其他文章如何提供pnpm镜像环境

跳过安装比较实在，因为我们已经安装了node版本的cypress不再需要安装二进制版本了

妙手

方案敲定，直接修改ci文件

variables:
  CYPRESS_INSTALL_BINARY: 0

遗留问题

安装一些依赖的时候依旧很吃网络环境。公司内部也通过verdaccio部署了自己的注册表，并且天然的提供缓存服务。
所以乘着这次修改，直接一起转移过去吧。