Swift 6 language mode support (#25)

# Swift 6 language mode support

## ♻️ Current situation & Problem
Repo wasn't maintained properly for the last months, updating for Swift
6 language mode and strict concurrency checking.


## ⚙️ Release Notes 
- Swift 6 language mode support


## 📚 Documentation
--


## ✅ Testing
--


## 📝 Code of Conduct & Contributing Guidelines 

By submitting creating this pull request, you agree to follow our [Code
of
Conduct](https://github.com/StanfordSpezi/.github/blob/main/CODE_OF_CONDUCT.md)
and [Contributing
Guidelines](https://github.com/StanfordSpezi/.github/blob/main/CONTRIBUTING.md):
- [x] I agree to follow the [Code of
Conduct](https://github.com/StanfordSpezi/.github/blob/main/CODE_OF_CONDUCT.md)
and [Contributing
Guidelines](https://github.com/StanfordSpezi/.github/blob/main/CONTRIBUTING.md).

Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version:5.9
+// swift-tools-version:6.0
 
 //
 // This source file is part of the Stanford Spezi open-source project
@@ -12,13 +12,6 @@ import class Foundation.ProcessInfo
 import PackageDescription
 
 
-#if swift(<6)
-let swiftConcurrency: SwiftSetting = .enableExperimentalFeature("StrictConcurrency")
-#else
-let swiftConcurrency: SwiftSetting = .enableUpcomingFeature("StrictConcurrency")
-#endif
-
-
 let package = Package(
     name: "SpeziHealthKit",
     defaultLocalization: "en",
@@ -29,18 +22,14 @@ let package = Package(
         .library(name: "SpeziHealthKit", targets: ["SpeziHealthKit"])
     ],
     dependencies: [
-        .package(url: "https://github.com/StanfordSpezi/Spezi", from: "1.7.0")
+        .package(url: "https://github.com/StanfordSpezi/Spezi", from: "1.8.0")
     ] + swiftLintPackage(),
     targets: [
         .target(
             name: "SpeziHealthKit",
             dependencies: [
                 .product(name: "Spezi", package: "Spezi")
             ],
-            swiftSettings: [
-                swiftConcurrency,
-                .enableUpcomingFeature("InferSendableFromCaptures")
-            ],
             plugins: [] + swiftLintPlugin()
         ),
         .testTarget(
@@ -49,9 +38,6 @@ let package = Package(
                 .product(name: "XCTSpezi", package: "Spezi"),
                 .target(name: "SpeziHealthKit")
             ],
-            swiftSettings: [
-                swiftConcurrency
-            ],
             plugins: [] + swiftLintPlugin()
         )
     ]

Sources/SpeziHealthKit/CollectSample/HealthKitSampleDataSource.swift

@@ -28,11 +28,11 @@ final class HealthKitSampleDataSource: HealthKitDataSource {
         }
     }
 
-    required init( // swiftlint:disable:this function_default_parameter_at_end
+    required init(
         healthStore: HKHealthStore,
         standard: any HealthKitConstraint,
         sampleType: HKSampleType,
-        predicate: NSPredicate? = nil,
+        predicate: NSPredicate? = nil,  // swiftlint:disable:this function_default_parameter_at_end
         deliverySetting: HealthKitDeliverySetting
     ) {
         self.healthStore = healthStore

Sources/SpeziHealthKit/HealthKit Extensions/HKHealthStore+BackgroundDelivery.swift

@@ -36,7 +36,10 @@ extension HKHealthStore {
             // "Whenever a matching sample is added to or deleted from the HealthKit store,
             // the system calls the query’s update handler on the same background queue (but not necessarily the same thread)."
             // So, the observerQuery has to be @Sendable!
-
+
+            // Sadly necessary to enable capture of the `completionHandler` within the `Task`s below (isolation error)
+            nonisolated(unsafe) let completionHandler = completionHandler
+
             guard error == nil,
                   let samples else {
                 Logger.healthKit.error("Failed HealthKit background delivery for observer query \(query) with error: \(error)")

Sources/SpeziHealthKit/HealthKit.swift

@@ -186,7 +186,7 @@ public final class HealthKit: Module, EnvironmentAccessible, DefaultInitializabl
     public func triggerDataSourceCollection() async {
         await withTaskGroup(of: Void.self) { group in
             for healthKitComponent in healthKitComponents {
-                group.addTask { @MainActor in
+                group.addTask { @MainActor @Sendable in
                     await healthKitComponent.triggerManualDataSourceCollection()
                 }
             }

Sources/SpeziHealthKit/Logging/Logger+HealthKit.swift

@@ -6,9 +6,9 @@
 // SPDX-License-Identifier: MIT
 //
 
-
 import OSLog
 
+
 extension Logger {
     /// Logs the view cycles like a view that appeared.
     static let healthKit = Logger(subsystem: "edu.stanford.spezi", category: "HealthKit")