While working on the 2.0 update for Gathered I have been trying to develop the app multiple platforms simultaneously. SwiftUI will solve this problem in the future, but I wish to support some OS versions that SwiftUI does not support.

As part of this I have been creating UI tests to test performance, but ran in to an issue when running the UI tests on macOS using Mac Catalyst:

Running tests...
The bundle “PerformanceXCTests” couldn’t be loaded because it is damaged or missing necessary resources. Try reinstalling the bundle.
(dlopen_preflight(...): no suitable image found.  Did find:
	...: code signature in (...) not valid for use in process using Library Validation: mapped file has no Team ID and is not a platform binary (signed with custom identity or adhoc?))

Add documentation

Improve API for Subscription/Cancellable

I am currently maintaining numerous Swift Packages that don't receive a constant flow of updates, but do receive updates when new Swift updates come out, or as I think of useful additions.

To ensure that I can make some of these less frequent updates without too much friction and with confidence in their correctness I rely heavily on GitHub Actions, which I'll go over in this blog post.

Much better handling of optional values, which also allows for non-optional values

Add support for --output flag to select subcommand

Build docs and attach a release binary to releases

Release candidate 1 for 1.0 stable release

Has lots of tests but little documentation. API has changes a lot since initial 0.1.0 but I’m happy with it now. Hopefully it is consistent and (once docs are added) easy to use.

A common pattern when using closures in Swift is to add [weak self] in the captures list to hold a weak reference to self and avoid a retain cycle. This is then often followed by the following:

guard let self = self else { return }

But I often forget that capture lists can capture other variables in the current scope, so I thought I'd highlight some other use cases.