Open lbussell opened 2 months ago
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[Triage] We may want to consider keeping the ManifestServiceExtensions class, since its existence allows us to keep the IManifestService interface as small as possible which reduces the complexity of testing the ManifestService. The methods in the ManifestServiceExtensions don't rely on any of the ManifestService's internal state.
At a high level, DockerService depends on the ManifestService. However, DockerService only relies on the ManifestService for methods that have the exact same signature and behavior as ManifestService commands (or its extension methods).
https://github.com/dotnet/docker-tools/blob/f2d23ef5d1312903ae8de3a9cc095b7e74422f8b/src/Microsoft.DotNet.ImageBuilder/src/DockerService.cs#L59-L60
The DockerServiceCache is also tightly coupled with the ImageDigestCache class because of the same reason. ImageDigestCache simply makes and caches calls to the ManifestService class (through DockerService).
https://github.com/dotnet/docker-tools/blob/f2d23ef5d1312903ae8de3a9cc095b7e74422f8b/src/Microsoft.DotNet.ImageBuilder/src/DockerServiceCache.cs#L55-L56
https://github.com/dotnet/docker-tools/blob/f2d23ef5d1312903ae8de3a9cc095b7e74422f8b/src/Microsoft.DotNet.ImageBuilder/src/ImageDigestCache.cs#L37-L43
We should remove DockerService's dependency on the ManifestService class, since there are commands that use the DockerService that don't rely on any functionality from the ManifestService. ImageDigestCache should become ManifestServiceCache (or potentially RegistryServiceClientCache, since that is the only class making the single network call). We should experiment with combining ManifestService and RegistryServiceClient.
Also, ManifestServiceExtensions can be combined into the ManifestService class since they are in the same namespace.
I have put together a branch where I experimented with removing the DockerService dependency on the ManifestService, but it is currently incomplete and not fully functional - https://github.com/lbussell/docker-tools/commits/dev/loganbussell/1262playground/