Fix: NextcloudFileProviderKit build with NextcloudKit.

NextcloudFileProviderKit was updated to use Swift 6 which imposes some upstream compatibility requirements on NextcloudKit.

Signed-off-by: Iva Horn <iva.horn@nextcloud.com>

Author: i2h3

Sources/NextcloudKit/NKCommon.swift

@@ -14,7 +14,7 @@ public enum NKTypeReachability: Int, Sendable {
 }
 
 public protocol NextcloudKitDelegate: AnyObject, Sendable {
-    func authenticationChallenge(_ session: URLSession, didReceive challenge: URLAuthenticationChallenge, completionHandler: @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void)
+    func authenticationChallenge(_ session: URLSession, didReceive challenge: URLAuthenticationChallenge, completionHandler: @Sendable @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void)
     func urlSessionDidFinishEvents(forBackgroundURLSession session: URLSession)
 
     func networkReachabilityObserver(_ typeReachability: NKTypeReachability)

Sources/NextcloudKit/NKError.swift

@@ -32,7 +32,7 @@ extension OCSPath {
     static var ocsXMLMsg: Self { ["d:error", "s:message"] }
 }
 
-public struct NKError: Error, Equatable {
+public struct NKError: Error, Equatable, Sendable {
     static let internalError = -9999
     public let errorCode: Int
     public let errorDescription: String

Sources/NextcloudKit/NKRequestOptions.swift

@@ -5,7 +5,7 @@
 
 import Foundation
 
-public class NKRequestOptions: NSObject {
+final public class NKRequestOptions: NSObject, Sendable {
     public let endpoint: String?
     public let version: String?
     internal(set) public var customHeader: [String: String]?

Sources/NextcloudKit/NextcloudKit+Download.swift

@@ -26,7 +26,7 @@ public extension NextcloudKit {
                   requestHandler: @escaping (_ request: DownloadRequest) -> Void = { _ in },
                   taskHandler: @escaping (_ task: URLSessionTask) -> Void = { _ in },
                   progressHandler: @escaping (_ progress: Progress) -> Void = { _ in },
-                  completionHandler: @escaping (_ account: String, _ etag: String?, _ date: Date?, _ lenght: Int64, _ headers: [AnyHashable: Any]?, _ afError: AFError?, _ nKError: NKError) -> Void) {
+                  completionHandler: @escaping (_ account: String, _ etag: String?, _ date: Date?, _ lenght: Int64, _ headers: [AnyHashable: any Sendable]?, _ afError: AFError?, _ nKError: NKError) -> Void) {
         var convertible: URLConvertible?
         if serverUrlFileName is URL {
             convertible = serverUrlFileName as? URLConvertible
@@ -103,7 +103,7 @@ public extension NextcloudKit {
         etag: String?,
         date: Date?,
         length: Int64,
-        headers: [AnyHashable: Any]?,
+        headers: [AnyHashable: any Sendable]?,
         afError: AFError?,
         nkError: NKError
     ) {

Sources/NextcloudKit/NextcloudKit+WebDAV.swift

@@ -1193,7 +1193,7 @@ public extension NextcloudKit {
                            showHiddenFiles: Bool,
                            account: String,
                            options: NKRequestOptions = NKRequestOptions(),
-                           taskHandler: @escaping (_ task: URLSessionTask) -> Void = { _ in }
+                           taskHandler: @Sendable @escaping (_ task: URLSessionTask) -> Void = { _ in }
     ) async -> (
         account: String,
         items: [NKTrash]?,

Sources/NextcloudKit/NextcloudKit.swift

@@ -10,7 +10,7 @@ import UIKit
 import Alamofire
 import SwiftyJSON
 
-open class NextcloudKit {
+open class NextcloudKit: @unchecked Sendable {
 #if swift(<6.0)
     public static let shared: NextcloudKit = {
         let instance = NextcloudKit()