Swift 6 Support

.gitignore

@@ -68,3 +68,4 @@ fastlane/test_output
 
 # Swift Package Manager
 .swiftpm
+.DS_Store

Package@swift-6.0.swift

@@ -0,0 +1,27 @@
+// swift-tools-version:6.0
+import PackageDescription
+
+#if canImport(Compression)
+let targets: [Target] = [
+    .target(name: "ZIPFoundation",
+            resources: [
+                .copy("Resources/PrivacyInfo.xcprivacy")
+            ]),
+    .testTarget(name: "ZIPFoundationTests", dependencies: ["ZIPFoundation"], exclude: ["Resources"])
+]
+#else
+let targets: [Target] = [
+    .systemLibrary(name: "CZLib", pkgConfig: "zlib", providers: [.brew(["zlib"]), .apt(["zlib"])]),
+    .target(name: "ZIPFoundation", dependencies: ["CZLib"], cSettings: [.define("_GNU_SOURCE", to: "1")]),
+    .testTarget(name: "ZIPFoundationTests", dependencies: ["ZIPFoundation"])
+]
+#endif
+
+let package = Package(
+    name: "ZIPFoundation",
+    products: [
+        .library(name: "ZIPFoundation", targets: ["ZIPFoundation"])
+    ],
+    targets: targets,
+    swiftLanguageModes: [.v5, .v6]
+)

Sources/ZIPFoundation/Archive+ZIP64.swift

@@ -143,8 +143,13 @@ extension Archive.ZIP64EndOfCentralDirectory {
 }
 
 /// Properties that represent the maximum value of each field
+#if swift(>=6.0)
+nonisolated(unsafe) var maxUInt32 = UInt32.max
+nonisolated(unsafe) var maxUInt16 = UInt16.max
+#else
 var maxUInt32 = UInt32.max
 var maxUInt16 = UInt16.max
+#endif
 
 var maxCompressedSize: UInt32 { maxUInt32 }
 var maxUncompressedSize: UInt32 { maxUInt32 }

Tests/ZIPFoundationTests/ZIPFoundationTests.swift

@@ -16,12 +16,13 @@ enum AdditionalDataError: Error {
     case invalidDataError
 }
 
-class ZIPFoundationTests: XCTestCase {
+class ZIPFoundationTests: XCTestCase, @unchecked Sendable {
+
     class var testBundle: Bundle {
         return Bundle(for: self)
     }
 
-    static var tempZipDirectoryURL: URL = {
+    static let tempZipDirectoryURL: URL = {
         let processInfo = ProcessInfo.processInfo
         var tempZipDirectory = URL(fileURLWithPath: NSTemporaryDirectory())
         tempZipDirectory.appendPathComponent("ZipTempDirectory")
@@ -34,7 +35,7 @@ class ZIPFoundationTests: XCTestCase {
     }()
 
     static var resourceDirectoryURL: URL {
-        var resourceDirectoryURL = URL(fileURLWithPath: #file)
+        var resourceDirectoryURL = URL(fileURLWithPath: #filePath)
         resourceDirectoryURL.deleteLastPathComponent()
         resourceDirectoryURL.appendPathComponent("Resources")
         return resourceDirectoryURL

Tests/ZIPFoundationTests/ZIPFoundationWritingTests.swift

@@ -339,7 +339,7 @@ extension ZIPFoundationTests {
         }
         defer { try? FileManager.default.removeItem(at: tempDir) }
 
-        waitForExpectations(timeout: 30.0)
+        wait(for: [unmountVolumeExpectation, createVolumeExpectation])
 #endif
     }
 }