Support for Private Repositories

[swhitty (Simon Whitty)]

Since Xcode 12.5 the default for xcodebuild is to use the system git for resolving packages.

I have used git url.<base>.insteadOf to allow CI to resolve private HTTPS repos.

See more:

Support for resolving private packages through HTTPS with xcodebuild

The way we do it in our CI is "this one weird trick". We (ab)use Git's url.<base>.insteadOf to re-write the clone URL to include the appropriate credentials in our pipeline and make use of xcodebuild's -usePackageSupportBuiltinSCM. Our CI of choice is GitLab and it provides ephemeral credentials as environment variables to clone over HTTPS for each job. Specifically it provides, CI_JOB_TOKEN, CI_SERVER_PROTOCOL, and CI_SERVER_HOST. Typically, our URLs in our Xcode and Package.swift files are o…