Test targets are nice in that it doesn't matter if the code you put in them gets accidentally annotated as public, because test targets don't get included in a library. But what if you have a target that has to get included in a library, where you want to disallow any public API. Is there anything to enforce that?
Use case: Test targets don't support SwiftUI previews. As far as I understand, previews require being included as a non-test target in a library, to work.
The Previews directory here is an example of what I'm talking about. I figure if you've got an entire relevant directory, maybe there's something to be done? I've never heard of it if so.
// swift-tools-version: 6.1
import PackageDescription
_ = Package(
name: name(),
platforms: [.iOS(.v15), .macOS(.v12)],
products: [
.library(
name: name(),
targets: [name(), name(suffix: .previews)]
)
],
targets: [
.target(name: name(), path: "Sources"),
.target(
name: name(suffix: .previews),
dependencies: [dependency],
path: .previews
),
.testTarget(name: name(suffix: "Tests"), dependencies: [dependency])
]
)
func name(suffix: String? = nil) -> String {
"MyLibrary" + (suffix ?? "")
}
extension String {
static var previews: Self { "Previews" }
}
var dependency: Target.Dependency { .init(stringLiteral: name()) }