xcode 使用 SwiftPackageManager 时报网

在使用 Swift 服务器框架 Vapor 时,因为用的是swiftPackageManager来管理依赖, xcode 打开项目后会自动拉取依赖,但是一直都拉取不成功,报如下错误:

截屏2021-06-07 上午9.34.02.png

在终端下使用xcodebuild -resolvePackageDependencies也不行,报同样的错误:

➜  hello git:(master) xcodebuild -resolvePackageDependencies
Command line invocation:
    /Applications/Xcode.app/Contents/Developer/usr/bin/xcodebuild -resolvePackageDependencies

Resolve Package Graph

Fetching https://github.com/vapor/vapor.git

Resolved source packages:
  hello: /Volumes/Work/vapor_project/hello

xcodebuild: error: Could not resolve package dependencies:
  An unknown error occurred. unexpected return value from ssl handshake -9806 (-1)

➜  hello git:(master) 

在查了各种资料后发现给xcodebuild再加个选项就可以成功解决此问题;

xcodebuild -resolvePackageDependencies -scmProvider system