So I have been browsing the web for a while now and can't seem to find an answer on how to build the native DocC Xcode documentation using a CLI command.
Both the xcodebuild commands and Fastlane do not provide a command to build the documentation - as far as I know.
The docs are supposed to be built inside a CI/CD Github Actions workflow. If there are other methods to accomplish this, any help is appreciated.
Apple has added a new command to xcodebuild tools:
xcodebuild docbuild
You can also take a look at the WWDC presentation "Host and automate your DocC documentation". Start watching from 7:06 min onwards for DocC automation: https://developer.apple.com/videos/play/wwdc2021/10236/