Updates for Swift 6.0

Package.swift

@@ -1,29 +1,29 @@
-// swift-tools-version: 5.7
+// swift-tools-version: 6.0
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 import PackageDescription
 
 let package = Package(
     name: "Cache",
     platforms: [
-        .iOS(.v14),
-        .macOS(.v12)
+        .iOS(.v16),
+        .macOS(.v13)
     ],
     products: [
         .library(
             name: "Cache",
             targets: ["Cache"])
     ],
     dependencies: [
-        .package(url: "https://github.com/krogerco/Gauntlet-iOS.git", from: Version(1, 0, 0))
+        .package(url: "https://github.com/krogerco/Gauntlet-iOS.git", from: "2.2.0")
     ],
     targets: [
         .target(name: "Cache"),
         .testTarget(
             name: "CacheTests",
             dependencies: [
                 .byName(name: "Cache"),
-                .product(name: "Gauntlet", package: "Gauntlet-iOS")
+                .product(name: "GauntletLegacy", package: "Gauntlet-iOS")
             ]
         )
     ]

Sources/Cache/Cache.swift

@@ -26,7 +26,7 @@ import Foundation
 typealias EventPublisher = PassthroughSubject<CacheEvent, Never>
 
 /// A memory based cache with configurable policies and optional persistence.
-public final class Cache<Key: CacheKey, Value: Codable> {
+public final class Cache<Key: CacheKey, Value: Codable>: @unchecked Sendable {
     let lock = NSRecursiveLock()
     let layer: MemoryCacheLayer<Key, Value>
     let identifier: String

Sources/Cache/CacheConfig.swift

@@ -23,7 +23,7 @@
 import Combine
 import Foundation
 
-class CacheConfig {
+struct CacheConfig {
     let location: CacheLocation?
     let eventPublisher: EventPublisher
 

Sources/Cache/CacheEvent.swift

@@ -23,7 +23,7 @@
 import Foundation
 
 /// Cache internal events that might be useful for debugging.
-public enum CacheEvent {
+public enum CacheEvent: Sendable {
     /// Cache was unable to load from the file. Will happen on first launch or if the Value type changes.
     case unableToLoad(URL, Error)
 

Sources/Cache/CacheKey.swift

@@ -23,4 +23,4 @@
 import Foundation
 
 /// The key used to look items up in cache objects.
-public typealias CacheKey = Hashable & Codable
+public typealias CacheKey = Hashable & Codable & Sendable

Sources/Cache/CacheLayer/MemoryCacheLayer.swift

@@ -28,7 +28,7 @@ import UIKit
 #endif
 
 /// A fully in-memory based cache with persistence.
-final class MemoryCacheLayer<Key: CacheKey, Value: Codable>: CacheLayer {
+final class MemoryCacheLayer<Key: CacheKey, Value: Codable>: CacheLayer, @unchecked Sendable {
     var config = CacheConfig()
     let policies: [CachePolicy]
     var cache: [Key: Item] = [:]
@@ -89,16 +89,16 @@ final class MemoryCacheLayer<Key: CacheKey, Value: Codable>: CacheLayer {
             object: nil,
             queue: .main
         ) { [weak self] _ in
-            guard let strongSelf = self else { return }
+            guard let self else { return }
 
-            strongSelf.lock.lock(); defer { strongSelf.lock.unlock() }
+            lock.lock(); defer { lock.unlock() }
 
             // Bail if empty.
-            guard !strongSelf.cache.isEmpty else { return }
+            guard !cache.isEmpty else { return }
 
             // Apply a policy that will purge half of the current cache.
-            let purgeAmount = strongSelf.cache.count / 2
-            strongSelf.apply([.maxItemCount(purgeAmount)])
+            let purgeAmount = cache.count / 2
+            apply([.maxItemCount(purgeAmount)])
         }
 #endif
     }

Sources/Cache/CacheLocation.swift

@@ -23,7 +23,7 @@
 import Foundation
 
 /// Specifies a directory where ``CacheLayer``s are stored.
-public struct CacheLocation {
+public struct CacheLocation: Sendable {
     /// Name of this location.
     public let locationName: String
 

Sources/Cache/CachePolicy.swift

@@ -25,7 +25,7 @@ import Foundation
 /// Policies that may be applied to each cache source.
 /// Generally, you would create a different and more lenient policy for each level of cache source.
 /// Specifying no policies results in caches with unbounded growth.
-public enum CachePolicy {
+public enum CachePolicy: Sendable {
     /// The maximum number of key/values the source should track.
     /// When this count is exceeded, the least recently used values will be purged.
     case maxItemCount(Int)

Sources/DemoApp/DemoApp.xcodeproj/project.pbxproj

@@ -160,7 +160,7 @@
 			attributes = {
 				BuildIndependentTargetsInParallel = 1;
 				LastSwiftUpdateCheck = 1420;
-				LastUpgradeCheck = 1420;
+				LastUpgradeCheck = 1630;
 				TargetAttributes = {
 					6732C75029BBAD7100D13B5C = {
 						CreatedOnToolsVersion = 14.2;
@@ -297,6 +297,7 @@
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				ENABLE_TESTABILITY = YES;
+				ENABLE_USER_SCRIPT_SANDBOXING = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				GCC_DYNAMIC_NO_PIC = NO;
 				GCC_NO_COMMON_BLOCKS = YES;
@@ -357,6 +358,7 @@
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				ENABLE_NS_ASSERTIONS = NO;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_USER_SCRIPT_SANDBOXING = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				GCC_NO_COMMON_BLOCKS = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
@@ -398,7 +400,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.kroger.DemoApp;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = YES;
-				SWIFT_VERSION = 5.0;
+				SWIFT_VERSION = 6.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Debug;
@@ -426,15 +428,14 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.kroger.DemoApp;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = YES;
-				SWIFT_VERSION = 5.0;
+				SWIFT_VERSION = 6.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Release;
 		};
 		6732C77929BBAD7200D13B5C /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = 1;
@@ -453,7 +454,6 @@
 		6732C77A29BBAD7200D13B5C /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = 1;

Sources/DemoApp/DemoApp.xcodeproj/xcshareddata/xcschemes/DemoApp.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1420"
+   LastUpgradeVersion = "1630"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

Sources/DemoApp/DemoApp/SampleModel.swift

@@ -44,7 +44,7 @@ struct ProductInfo: Codable {
 // Object responsible for providing product information.
 // Typically this would be a network call.
 struct ProductProvider {
-    func getInfo(for product: SampleProduct, _ completion: @escaping (ProductInfo) -> Void) {
+    func getInfo(for product: SampleProduct, _ completion: @escaping @Sendable (ProductInfo) -> Void) {
         let info: ProductInfo
 
         switch product {
@@ -71,6 +71,7 @@ struct ProductProvider {
 }
 
 // Sample view model that manages the selected product and the fetched details for that product.
+@MainActor
 class SampleModel: ObservableObject {
     // The currently selected product and it's details.
     @Published var selectedProduct: SampleProduct = .product3
@@ -101,11 +102,15 @@ class SampleModel: ObservableObject {
                 // Info not in the cache. Fetch the info and update when complete.
                 self.productInfo = nil
                 self.provider.getInfo(for: product) { info in
-                    // Update the cache.
-                    self.cache[product] = info
+                    Task { @MainActor [weak self] in
+                        guard let self else { return }
 
-                    // Publish the info.
-                    self.productInfo = info
+                        // Update the cache.
+                        self.cache[product] = info
+
+                        // Publish the info.
+                        self.productInfo = info
+                    }
                 }
             }
         }

Tests/CacheTests/CacheLocationTests.swift

@@ -21,7 +21,7 @@
 // SOFTWARE.
 
 @testable import Cache
-import Gauntlet
+import GauntletLegacy
 import XCTest
 
 class CacheLocationTests: XCTestCase {

Tests/CacheTests/CacheTests.swift

@@ -21,7 +21,7 @@
 // SOFTWARE.
 
 @testable import Cache
-import Gauntlet
+import GauntletLegacy
 import XCTest
 
 final class CacheTestCases: XCTestCase {

Tests/CacheTests/CodableFileTests.swift

@@ -20,7 +20,7 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 
-import Gauntlet
+import GauntletLegacy
 @testable import Cache
 import XCTest
 

Tests/CacheTests/MemoryCacheLayerTests.swift

@@ -21,7 +21,7 @@
 // SOFTWARE.
 
 @testable import Cache
-import Gauntlet
+import GauntletLegacy
 import XCTest
 
 class MemoryCacheLayerTestCase: XCTestCase {

Tests/CacheTests/MockCacheLayer.swift

@@ -23,7 +23,7 @@
 @testable import Cache
 import Foundation
 
-extension CacheItem: @retroactive Equatable where Key == String, Value: Equatable {
+extension CacheItem: Equatable where Key == String, Value: Equatable {
     public static func == (lhs: CacheItem<Key, Value>, rhs: CacheItem<Key, Value>) -> Bool {
         lhs.key == rhs.key &&
             lhs.creationDate == rhs.creationDate &&