Handle providers properly in multiplex log handler #254
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Co-authored-by: Moritz Lang <[email protected]>
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[](https://renovatebot.com) This PR contains the following updates: | Package | Update | Change | |---|---|---| | [apple/swift-log](https://togithub.com/apple/swift-log) | minor | `from: "1.4.4"` -> `from: "1.5.2"` | --- ### Release Notes <details> <summary>apple/swift-log</summary> ### [`v1.5.2`](https://togithub.com/apple/swift-log/releases/tag/1.5.2) [Compare Source](https://togithub.com/apple/swift-log/compare/1.5.1...1.5.2) #### Primary change Address too aggressive warning logging on LogHandlers that do not support `MetadataProvider`. The warning would be emitted too frequently, resulting in flooding logs with warnings. Instead, the warning is now emitted once per log handler type. #### What's Changed - Avoid logging warnings when handler does not support metadataproviders by [@​ktoso](https://togithub.com/ktoso) in [https://github.com/apple/swift-log/pull/252](https://togithub.com/apple/swift-log/pull/252) - Handle providers properly in multiplex log handler by [@​ktoso](https://togithub.com/ktoso) in [https://github.com/apple/swift-log/pull/254](https://togithub.com/apple/swift-log/pull/254) - Add CI for Swift 5.8 and update nightly to Ubuntu 22.04 by [@​yim-lee](https://togithub.com/yim-lee) in [https://github.com/apple/swift-log/pull/255](https://togithub.com/apple/swift-log/pull/255) **Full Changelog**: apple/swift-log@1.5.1...1.5.2 ### [`v1.5.1`](https://togithub.com/apple/swift-log/releases/tag/1.5.1) [Compare Source](https://togithub.com/apple/swift-log/compare/1.5.0...1.5.1) #### Summary This patch release focuses on minor cleanups to ergonomics of setting metadata providers with the default stream log handlers, and fixes a bug in the default handler not printing the provided extra metadata by default (it does now). Thank you to [@​slashmo](https://togithub.com/slashmo) for quickly noticing and providing a patch for the latter! #### What's Changed - Allow passing explicit provider into the stream handlers by [@​ktoso](https://togithub.com/ktoso) in [https://github.com/apple/swift-log/pull/250](https://togithub.com/apple/swift-log/pull/250) - Emit correct metadata from StreamLogHandler by [@​slashmo](https://togithub.com/slashmo) in [https://github.com/apple/swift-log/pull/251](https://togithub.com/apple/swift-log/pull/251) **Full Changelog**: apple/swift-log@1.5.0...1.5.1 ### [`v1.5.0`](https://togithub.com/apple/swift-log/releases/tag/1.5.0) [Compare Source](https://togithub.com/apple/swift-log/compare/1.4.4...1.5.0) ### Changes #### Swift version support This release drops support for Swift 5.0. Swift 5.1+ remain supported for the time being. #### Logger.MetadataProvider This release introduces metadata providers! They are an additional way to add metadata to your log statements automatically whenever a log statement is about to be made. This works extremely well with systems like distributed tracing, that may pick up trace identifiers and other information from the task-local context from where the log statement is being made. The feature came with a [swift evolution style proposal](https://togithub.com/apple/swift-log/blob/main/proposals/0001-metadata-providers.md) introduction to the "why?" and "how?" of this feature you may find interesting. Metadata providers are used like this: ```swift import Logging enum Namespace { @​TaskLocal static var simpleTraceID: String? } let simpleTraceIDMetadataProvider = Logger.MetadataProvider { guard let traceID = Namespace.simpleTraceID else { return [:] } return ["simple-trace-id": .string(traceID)] } LoggingSystem.bootstrap({ label, metadataProvider in myCoolLogHandler(label: label, metadataProvider: metadataProvider) }, metadataProvider: simpleTraceIDMetadataProvider) ``` which in turn makes every `Logger` on this `LoggingSystem` add this contextual metadata to log statements automatically: ```swift let log = Logger(label: "hello") Namespace.$simpleTraceID.withValue("1234-5678") { test() } func test() { log.info("test log statement") } // [info] [simple-trace-id: 1234-5678] test log statement ``` ##### Adoption in `LogHandler`s In order to support this new feature in your log handlers, please make it accept a `MetadataProvider?` at creation, and store it as: ```swift struct MyHandler: LogHandler { // ... public var metadataProvider: Logger.MetadataProvider? // ... } ``` #### What's Changed ##### Highlight - Metadata Providers (e.g. for Distributed Tracing) in LogHandlers by [@​ktoso](https://togithub.com/ktoso) in [https://github.com/apple/swift-log/pull/238](https://togithub.com/apple/swift-log/pull/238) ##### Other changes - \[docs] Minimal docc setup and landing page by [@​ktoso](https://togithub.com/ktoso) in [https://github.com/apple/swift-log/pull/226](https://togithub.com/apple/swift-log/pull/226) - \=docc Make docs use symbol references by [@​ktoso](https://togithub.com/ktoso) in [https://github.com/apple/swift-log/pull/230](https://togithub.com/apple/swift-log/pull/230) - \=docc Move to multiple Package.swift files by [@​ktoso](https://togithub.com/ktoso) in [https://github.com/apple/swift-log/pull/231](https://togithub.com/apple/swift-log/pull/231) - Undo 5.7 package files, not needed yet by [@​ktoso](https://togithub.com/ktoso) in [https://github.com/apple/swift-log/pull/232](https://togithub.com/apple/swift-log/pull/232) - Update README: Add missing Source param by [@​Rusik](https://togithub.com/Rusik) in [https://github.com/apple/swift-log/pull/233](https://togithub.com/apple/swift-log/pull/233) - Fix build for wasm by [@​ahti](https://togithub.com/ahti) in [https://github.com/apple/swift-log/pull/236](https://togithub.com/apple/swift-log/pull/236) - Add .spi.yml for Swift Package Index DocC support by [@​yim-lee](https://togithub.com/yim-lee) in [https://github.com/apple/swift-log/pull/240](https://togithub.com/apple/swift-log/pull/240) - Fixes link to Supabase repository in README.md by [@​timobollwerk](https://togithub.com/timobollwerk) in [https://github.com/apple/swift-log/pull/245](https://togithub.com/apple/swift-log/pull/245) #### New Contributors - [@​Rusik](https://togithub.com/Rusik) made their first contribution in [https://github.com/apple/swift-log/pull/233](https://togithub.com/apple/swift-log/pull/233) - [@​ahti](https://togithub.com/ahti) made their first contribution in [https://github.com/apple/swift-log/pull/236](https://togithub.com/apple/swift-log/pull/236) - [@​timobollwerk](https://togithub.com/timobollwerk) made their first contribution in [https://github.com/apple/swift-log/pull/245](https://togithub.com/apple/swift-log/pull/245) **Full Changelog**: apple/swift-log@1.4.4...1.5.0 </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Enabled. ♻ **Rebasing**: Whenever PR is behind base branch, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR has been generated by [Mend Renovate](https://www.mend.io/free-developer-tools/renovate/). 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Resolves #253
The handling is a bit tricky, but we uphold reasonable semantics now.
We could cache the calculation a bit more perhaps rather than each time in the
get{}but this has the right semantics at least.