Archive Build Requires 'Preview Content'

Question

GoZoner OP

Created Feb ’24

Replies 1

Boosts 0

Participants 2

Does an 'archive build' require 'preview content'?

I've put swift source files into 'Preview Content' directories - one directory for the top-level App and one for an embedded framework. An 'archive build' fails, complaining about the code in a #Preview block.

#Preview {
    // the archive build fails to find this `default` ??
    let controller = PersistenceControllerTopLevelPreview.default
    let user = controller.user
    ...

The framework has its 'Preview Context' specified in the Development Assets; same with the top-level App.

Answered by Developer Tools Engineer in 780700022

Hi,

#Preview and its predecessor PreviewProvider tend to get dead code stripped when building for release, but there are projects where lingering references might cause them to stick around. Best way to be sure they are only present in debug builds would be to wrap the definitions like so:

#if DEBUG
#Preview {
    …
}
#endif

Hope that helps.

Boost

Answer 1

Developer Tools Engineer OP

Apple

Feb ’24

Accepted Answer

Hi,

#Preview and its predecessor PreviewProvider tend to get dead code stripped when building for release, but there are projects where lingering references might cause them to stick around. Best way to be sure they are only present in debug builds would be to wrap the definitions like so:

#if DEBUG
#Preview {
    …
}
#endif

Hope that helps.

1