Enable compilation with Swift 6 for most targets

.github/workflows/ios-build-xcode-16.yml

@@ -41,11 +41,6 @@ jobs:
         with:
           go-version: 1.21.13
 
-      - name: Set up yeetd to workaround XCode being slow in CI
-        run: |
-          wget https://github.com/biscuitehh/yeetd/releases/download/1.0/yeetd-normal.pkg
-          sudo installer -pkg yeetd-normal.pkg -target /
-          yeetd &
       - name: Configure Xcode
         uses: maxim-lobanov/setup-xcode@v1
         with:

.github/workflows/ios-screenshots-creation.yml

@@ -1,6 +1,6 @@
 ---
 name: iOS create screenshots
 on:
   push:
     tags:
       - ios/*
@@ -15,7 +15,7 @@
 jobs:
   test:
     name: Take screenshots
-    runs-on: macos-13-xlarge
+    runs-on: macos-15-xlarge
     env:
       SOURCE_PACKAGES_PATH: .spm
       TEST_ACCOUNT: ${{ secrets.IOS_TEST_ACCOUNT_NUMBER }}
@@ -28,15 +28,10 @@
         with:
           go-version: 1.21.13
 
-      - name: Set up yeetd to workaround XCode being slow in CI
-        run: |
-          wget https://github.com/biscuitehh/yeetd/releases/download/1.0/yeetd-normal.pkg
-          sudo installer -pkg yeetd-normal.pkg -target /
-          yeetd &
       - name: Configure Xcode
         uses: maxim-lobanov/setup-xcode@v1
         with:
-          xcode-version: '15.0.1'
+          xcode-version: '16.1'
       - name: Configure Rust
         run: |
           rustup default stable

.github/workflows/ios-screenshots-tests.yml

@@ -19,7 +19,7 @@ jobs:
   test:
     if: github.event.pull_request.merged || github.event_name == 'workflow_dispatch'
     name: Screenshot tests
-    runs-on: macos-13-xlarge
+    runs-on: macos-15-xlarge
     env:
       SOURCE_PACKAGES_PATH: .spm
       TEST_ACCOUNT: ${{ secrets.IOS_TEST_ACCOUNT_NUMBER }}
@@ -40,15 +40,10 @@ jobs:
         with:
           go-version: 1.21.13
 
-      - name: Set up yeetd to workaround XCode being slow in CI
-        run: |
-          wget https://github.com/biscuitehh/yeetd/releases/download/1.0/yeetd-normal.pkg
-          sudo installer -pkg yeetd-normal.pkg -target /
-          yeetd &
       - name: Configure Xcode
         uses: maxim-lobanov/setup-xcode@v1
         with:
-          xcode-version: '15.0.1'
+          xcode-version: '16.1'
       - name: Configure Rust
         run: |
           rustup default stable
@@ -84,7 +79,7 @@ jobs:
             -project MullvadVPN.xcodeproj \
             -scheme MullvadVPN \
             -testPlan MullvadVPNScreenshots \
-            -destination "platform=iOS Simulator,name=iPhone 15" \
+            -destination "platform=iOS Simulator,name=iPhone 16" \
             -clonedSourcePackagesDirPath "$SOURCE_PACKAGES_PATH" \
             -disableAutomaticPackageResolution \
             -resultBundlePath xcode-test-report \

.github/workflows/ios-validate-build-schemas.yml

@@ -21,7 +21,7 @@ jobs:
   test:
     if: github.event.pull_request.merged == true
     name: Validate build schemas
-    runs-on: macos-13-xlarge
+    runs-on: macos-15-xlarge
     env:
       SOURCE_PACKAGES_PATH: .spm
     steps:
@@ -41,15 +41,10 @@ jobs:
         with:
           go-version: 1.21.13
 
-      - name: Set up yeetd to workaround XCode being slow in CI
-        run: |
-          wget https://github.com/biscuitehh/yeetd/releases/download/1.0/yeetd-normal.pkg
-          sudo installer -pkg yeetd-normal.pkg -target /
-          yeetd &
       - name: Configure Xcode
         uses: maxim-lobanov/setup-xcode@v1
         with:
-          xcode-version: '15.0.1'
+          xcode-version: '16.1'
       - name: Configure Rust
         run: |
           rustup default stable
@@ -82,23 +77,23 @@ jobs:
             -project MullvadVPN.xcodeproj \
             -scheme MullvadVPN \
             -configuration MockRelease \
-            -destination "platform=iOS Simulator,name=iPhone 15" \
+            -destination "platform=iOS Simulator,name=iPhone 16" \
             -clonedSourcePackagesDirPath "$SOURCE_PACKAGES_PATH" \
             -disableAutomaticPackageResolution \
             build
           set -o pipefail && env NSUnbufferedIO=YES xcodebuild \
             -project MullvadVPN.xcodeproj \
             -scheme MullvadVPN \
             -configuration Staging \
-            -destination "platform=iOS Simulator,name=iPhone 15" \
+            -destination "platform=iOS Simulator,name=iPhone 16" \
             -clonedSourcePackagesDirPath "$SOURCE_PACKAGES_PATH" \
             -disableAutomaticPackageResolution \
             build
           set -o pipefail && env NSUnbufferedIO=YES xcodebuild \
             -project MullvadVPN.xcodeproj \
             -scheme MullvadVPNUITests \
             -configuration Debug \
-            -destination "platform=iOS Simulator,name=iPhone 15" \
+            -destination "platform=iOS Simulator,name=iPhone 16" \
             -clonedSourcePackagesDirPath "$SOURCE_PACKAGES_PATH" \
             -disableAutomaticPackageResolution \
             build

.github/workflows/ios.yml

@@ -15,7 +15,7 @@ permissions: {}
 jobs:
   check-formatting:
     name: Check formatting
-    runs-on: macos-13
+    runs-on: macos-15
     steps:
       - name: Install SwiftFormat
         run: |
@@ -33,7 +33,7 @@ jobs:
 
   swiftlint:
     name: Run swiftlint
-    runs-on: macos-13
+    runs-on: macos-15
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -47,7 +47,7 @@ jobs:
 
   test:
     name: Unit tests
-    runs-on: macos-13-xlarge
+    runs-on: macos-15-xlarge
     env:
       SOURCE_PACKAGES_PATH: .spm
     steps:
@@ -77,15 +77,10 @@ jobs:
           brew update
           brew install protobuf
 
-      - name: Set up yeetd to workaround XCode being slow in CI
-        run: |
-          wget https://github.com/biscuitehh/yeetd/releases/download/1.0/yeetd-normal.pkg
-          sudo installer -pkg yeetd-normal.pkg -target /
-          yeetd &
       - name: Configure Xcode
         uses: maxim-lobanov/setup-xcode@v1
         with:
-          xcode-version: '15.0.1'
+          xcode-version: '16.1'
       - name: Configure Rust
         # Since the https://github.com/actions/runner-images/releases/tag/macos-13-arm64%2F20240721.1 release
         # Brew does not install tools at the correct location anymore
@@ -115,7 +110,7 @@ jobs:
             -project MullvadVPN.xcodeproj \
             -scheme MullvadVPN \
             -testPlan MullvadVPNCI \
-            -destination "platform=iOS Simulator,name=iPhone 15" \
+            -destination "platform=iOS Simulator,name=iPhone 16" \
             -clonedSourcePackagesDirPath "$SOURCE_PACKAGES_PATH" \
             -disableAutomaticPackageResolution \
             -resultBundlePath xcode-test-report \

ios/MullvadLogging/LogFileOutputStream.swift

@@ -13,7 +13,7 @@ import MullvadTypes
 /// the first place, or when writing to it.
 private let reopenFileLogInterval: Duration = .seconds(5)
 
-class LogFileOutputStream: TextOutputStream {
+class LogFileOutputStream: TextOutputStream, @unchecked Sendable {
     private let queue = DispatchQueue(label: "LogFileOutputStreamQueue", qos: .utility)
 
     private let baseFileURL: URL

ios/MullvadLogging/OSLogHandler.swift

@@ -22,7 +22,7 @@ public struct OSLogHandler: LogHandler {
         let category: String
     }
 
-    private static var osLogRegistry: [RegistryKey: OSLog] = [:]
+    nonisolated(unsafe) private static var osLogRegistry: [RegistryKey: OSLog] = [:]
     private static let registryLock = NSLock()
 
     private static func getOSLog(subsystem: String, category: String) -> OSLog {

ios/MullvadMockData/MullvadREST/AccessMethodRepository+Stub.swift

@@ -9,7 +9,7 @@
 import Combine
 import MullvadSettings
 
-public struct AccessMethodRepositoryStub: AccessMethodRepositoryDataSource {
+public struct AccessMethodRepositoryStub: AccessMethodRepositoryDataSource, @unchecked Sendable {
     public var directAccess: PersistentAccessMethod
 
     public var accessMethodsPublisher: AnyPublisher<[PersistentAccessMethod], Never> {

ios/MullvadMockData/MullvadREST/RESTRequestExecutor+Stubs.swift

@@ -10,7 +10,7 @@ import Foundation
 import MullvadREST
 import MullvadTypes
 
-struct RESTRequestExecutorStub<Success>: RESTRequestExecutor {
+struct RESTRequestExecutorStub<Success: Sendable>: RESTRequestExecutor {
     var success: (() -> Success)?
 
     func execute(completionHandler: @escaping (Result<Success, Error>) -> Void) -> Cancellable {

ios/MullvadREST/ApiHandlers/APIAvailabilityTestRequest.swift

@@ -10,7 +10,7 @@ import Foundation
 import MullvadTypes
 
 extension REST {
-    public struct APIAvailabilityTestRequest {
+    public struct APIAvailabilityTestRequest: Sendable {
         let transport: RESTTransport
 
         public init(transport: RESTTransport) {
@@ -21,7 +21,7 @@ extension REST {
         ///
         /// - Parameter completion: Completes with `nil` if the request was successful, and `Error` otherwise.
         /// - Returns: A cancellable token to cancel the request inflight.
-        public func makeRequest(completion: @escaping (Swift.Error?) -> Void) -> Cancellable {
+        public func makeRequest(completion: @escaping @Sendable (Swift.Error?) -> Void) -> Cancellable {
             do {
                 let factory = RequestFactory(
                     hostname: defaultAPIHostname,

ios/MullvadREST/ApiHandlers/AddressCache.swift

@@ -11,7 +11,7 @@ import MullvadLogging
 import MullvadTypes
 
 extension REST {
-    public final class AddressCache {
+    public final class AddressCache: @unchecked Sendable {
         /// Logger.
         private let logger = Logger(label: "AddressCache")
 

ios/MullvadREST/ApiHandlers/RESTAPIProxy.swift

@@ -10,16 +10,16 @@ import Foundation
 import MullvadTypes
 import WireGuardKitTypes
 
-public protocol APIQuerying {
+public protocol APIQuerying: Sendable {
     func getAddressList(
         retryStrategy: REST.RetryStrategy,
-        completionHandler: @escaping ProxyCompletionHandler<[AnyIPEndpoint]>
+        completionHandler: @escaping @Sendable ProxyCompletionHandler<[AnyIPEndpoint]>
     ) -> Cancellable
 
     func getRelays(
         etag: String?,
         retryStrategy: REST.RetryStrategy,
-        completionHandler: @escaping ProxyCompletionHandler<REST.ServerRelaysCacheResponse>
+        completionHandler: @escaping @Sendable ProxyCompletionHandler<REST.ServerRelaysCacheResponse>
     ) -> Cancellable
 
     func createApplePayment(
@@ -30,19 +30,19 @@ public protocol APIQuerying {
     func sendProblemReport(
         _ body: REST.ProblemReportRequest,
         retryStrategy: REST.RetryStrategy,
-        completionHandler: @escaping ProxyCompletionHandler<Void>
+        completionHandler: @escaping @Sendable ProxyCompletionHandler<Void>
     ) -> Cancellable
 
     func submitVoucher(
         voucherCode: String,
         accountNumber: String,
         retryStrategy: REST.RetryStrategy,
-        completionHandler: @escaping ProxyCompletionHandler<REST.SubmitVoucherResponse>
+        completionHandler: @escaping @Sendable ProxyCompletionHandler<REST.SubmitVoucherResponse>
     ) -> Cancellable
 }
 
 extension REST {
-    public final class APIProxy: Proxy<AuthProxyConfiguration>, APIQuerying {
+    public final class APIProxy: Proxy<AuthProxyConfiguration>, APIQuerying, @unchecked Sendable {
         public init(configuration: AuthProxyConfiguration) {
             super.init(
                 name: "APIProxy",
@@ -57,7 +57,7 @@ extension REST {
 
         public func getAddressList(
             retryStrategy: REST.RetryStrategy,
-            completionHandler: @escaping ProxyCompletionHandler<[AnyIPEndpoint]>
+            completionHandler: @escaping @Sendable ProxyCompletionHandler<[AnyIPEndpoint]>
         ) -> Cancellable {
             let requestHandler = AnyRequestHandler { endpoint in
                 try self.requestFactory.createRequest(
@@ -84,7 +84,7 @@ extension REST {
         public func getRelays(
             etag: String?,
             retryStrategy: REST.RetryStrategy,
-            completionHandler: @escaping ProxyCompletionHandler<ServerRelaysCacheResponse>
+            completionHandler: @escaping @Sendable ProxyCompletionHandler<ServerRelaysCacheResponse>
         ) -> Cancellable {
             let requestHandler = AnyRequestHandler { endpoint in
                 var requestBuilder = try self.requestFactory.createRequestBuilder(
@@ -240,7 +240,7 @@ extension REST {
             voucherCode: String,
             accountNumber: String,
             retryStrategy: REST.RetryStrategy,
-            completionHandler: @escaping ProxyCompletionHandler<SubmitVoucherResponse>
+            completionHandler: @escaping @Sendable ProxyCompletionHandler<SubmitVoucherResponse>
         ) -> Cancellable {
             let requestHandler = AnyRequestHandler(
                 createURLRequest: { endpoint, authorization in
@@ -283,16 +283,16 @@ extension REST {
 
     // MARK: - Response types
 
-    public enum ServerRelaysCacheResponse {
+    public enum ServerRelaysCacheResponse: Sendable {
         case notModified
         case newContent(_ etag: String?, _ rawData: Data)
     }
 
-    private struct CreateApplePaymentRequest: Encodable {
+    private struct CreateApplePaymentRequest: Encodable, Sendable {
         let receiptString: Data
     }
 
-    public enum CreateApplePaymentResponse {
+    public enum CreateApplePaymentResponse: Sendable {
         case noTimeAdded(_ expiry: Date)
         case timeAdded(_ timeAdded: Int, _ newExpiry: Date)
 
@@ -322,12 +322,12 @@ extension REST {
         }
     }
 
-    private struct CreateApplePaymentRawResponse: Decodable {
+    private struct CreateApplePaymentRawResponse: Decodable, Sendable {
         let timeAdded: Int
         let newExpiry: Date
     }
 
-    public struct ProblemReportRequest: Encodable {
+    public struct ProblemReportRequest: Encodable, Sendable {
         public let address: String
         public let message: String
         public let log: String
@@ -341,11 +341,11 @@ extension REST {
         }
     }
 
-    private struct SubmitVoucherRequest: Encodable {
+    private struct SubmitVoucherRequest: Encodable, Sendable {
         let voucherCode: String
     }
 
-    public struct SubmitVoucherResponse: Decodable {
+    public struct SubmitVoucherResponse: Decodable, Sendable {
         public let timeAdded: Int
         public let newExpiry: Date
 

ios/MullvadREST/ApiHandlers/RESTAccessTokenManager.swift

@@ -11,17 +11,17 @@ import MullvadLogging
 import MullvadTypes
 import Operations
 
-public protocol RESTAccessTokenManagement {
+public protocol RESTAccessTokenManagement: Sendable {
     func getAccessToken(
         accountNumber: String,
-        completionHandler: @escaping ProxyCompletionHandler<REST.AccessTokenData>
+        completionHandler: @escaping @Sendable ProxyCompletionHandler<REST.AccessTokenData>
     ) -> Cancellable
 
     func invalidateAllTokens()
 }
 
 extension REST {
-    public final class AccessTokenManager: RESTAccessTokenManagement {
+    public final class AccessTokenManager: RESTAccessTokenManagement, @unchecked Sendable {
         private let logger = Logger(label: "REST.AccessTokenManager")
         private let operationQueue = AsyncOperationQueue.makeSerial()
         private let dispatchQueue = DispatchQueue(label: "REST.AccessTokenManager.dispatchQueue")
@@ -34,7 +34,7 @@ extension REST {
 
         public func getAccessToken(
             accountNumber: String,
-            completionHandler: @escaping ProxyCompletionHandler<REST.AccessTokenData>
+            completionHandler: @escaping @Sendable ProxyCompletionHandler<REST.AccessTokenData>
         ) -> Cancellable {
             let operation =
                 ResultBlockOperation<REST.AccessTokenData>(dispatchQueue: dispatchQueue) { finish -> Cancellable in