Don't cache preview app entry point dependencies #321
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We have a longstanding gotcha where we tell folks to avoid instantiating their root model on their app entry point because any dependencies on the root model may negatively affect any preview in their application. This PR detects when a dependency is accessed in a SwiftUI preview app entry point and prevents it from influencing the cache using the call stack symbols available. While this isn't a silver bullet, and any async work kicked off from the app entry point could still affect things negatively, this should hopefully be mostly an improvement on the status quo and maybe we won't have to refer folks to this gotcha as often in the future.
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We have a longstanding gotcha where we tell folks to avoid instantiating their root model on their app entry point because any dependencies on the root model may negatively affect any preview in their application.
This PR detects when a dependency is accessed in a SwiftUI preview app entry point and prevents it from influencing the cache using the call stack symbols available. While this isn't a silver bullet, and any async work kicked off from the app entry point could still affect things negatively, this should hopefully be mostly an improvement on the status quo and maybe we won't have to refer folks to this gotcha as often in the future.