Migrated to Swift 6.0 (#225)

## Description

<!--- 
Please include a summary of the change and which issue is fixed. Please
also include relevant motivation and context.
-->

Migrated the code base to Swift 6.1

## Type of change

<!--- Please delete options that are not relevant. -->

- [x] New feature (non-breaking change which adds functionality)

---------

Co-authored-by: brennobemoura <[email protected]>

Author: o-nnerb

.github/workflows/code-coverage.yml

@@ -34,6 +34,7 @@ jobs:
       platform: ${{ matrix.platform }}
       name: ${{ matrix.name }}
       coverage-enabled: true
+      swift-version: "6.1"
     secrets: inherit
 
   apple-tests:

.github/workflows/no-breaking-changes.yml

@@ -15,4 +15,6 @@ concurrency:
 jobs:
   breaking-changes:
     uses: request-dl/.github/.github/workflows/no-breaking-changes.yml@main
+    with:
+      swift-version: "6.1"
     secrets: inherit

Package.resolved

@@ -1,4 +1,4 @@
-// swift-tools-version: 5.10
+// swift-tools-version: 6.1
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 import PackageDescription
@@ -23,27 +23,23 @@ let package = Package(
             from: "1.27.0"
         ),
         .package(
-            url: "https://github.com/apple/swift-docc-plugin.git",
-            from: "1.4.5"
-        ),
-        .package(
-            url: "https://github.com/apple/swift-nio.git",
+            url: "https://github.com/apple/swift-nio",
             from: "2.86.0"
         ),
         .package(
-            url: "https://github.com/apple/swift-nio-extras.git",
+            url: "https://github.com/apple/swift-nio-extras",
             from: "1.29.0"
         ),
         .package(
-            url: "https://github.com/apple/swift-nio-ssl.git",
-            from: "2.33.0"
+            url: "https://github.com/apple/swift-nio-ssl",
+            from: "2.34.0"
         ),
         .package(
-            url: "https://github.com/apple/swift-nio-transport-services.git",
+            url: "https://github.com/apple/swift-nio-transport-services",
             from: "1.25.1"
         ),
         .package(
-            url: "https://github.com/apple/swift-log.git",
+            url: "https://github.com/apple/swift-log",
             from: "1.6.4"
         )
     ],
@@ -66,16 +62,8 @@ let package = Package(
 
         .testTarget(
             name: "RequestDLTests",
-            dependencies: [
-                "RequestDL",
-                .product(name: "AsyncHTTPClient", package: "async-http-client"),
-                .product(name: "NIO", package: "swift-nio"),
-                .product(name: "NIOPosix", package: "swift-nio"),
-                .product(name: "NIOSSL", package: "swift-nio-ssl"),
-                .product(name: "NIOTransportServices", package: "swift-nio-transport-services"),
-                .product(name: "Logging", package: "swift-log")
-            ],
+            dependencies: ["RequestDL"],
             resources: [.process("Resources")]
         )
     ]
-)
+)

Package.swift

@@ -9,31 +9,44 @@ extension Internals.Override {
     #if DEBUG
     enum FatalError {
 
-        typealias Closure = (String, StaticString, UInt) -> Never
+        typealias Closure = @Sendable (String, StaticString, UInt) -> Never
 
-        fileprivate static var closure: Closure = defaultClosure
+        fileprivate final class State: @unchecked Sendable {
+
+            var closure: Closure {
+                get { lock.withLock { _closure } }
+                set { lock.withLock { _closure = newValue } }
+            }
+
+            private let lock = Lock()
+            private var _closure: Closure = defaultClosure
+
+            init() {}
+        }
+
+        fileprivate static let state = State()
 
         private static let defaultClosure: Closure = {
             Swift.fatalError($0, file: $1, line: $2)
         }
 
         static func replace(with closure: @escaping Closure) {
-            self.closure = closure
+            self.state.closure = closure
         }
 
         static func restore() {
-            closure = defaultClosure
+            state.closure = defaultClosure
         }
     }
     #endif
 
     static func fatalError(
-        _ message: @autoclosure () -> String = String(),
+        _ message: @Sendable @autoclosure () -> String = String(),
         file: StaticString = #file,
         line: UInt = #line
     ) -> Never {
         #if DEBUG
-        FatalError.closure(message(), file, line)
+        FatalError.state.closure(message(), file, line)
         #else
         Swift.fatalError(
             message(),

Sources/RequestDL/Internals/Extensions/Override/Internals.Override.FatalError.swift

@@ -7,28 +7,41 @@ import Foundation
 extension Internals.Override {
 
     #if DEBUG
-    enum Print {
-        typealias Closure = (String, String, Any...) -> Void
+    enum Print: Sendable {
+        typealias Closure = @Sendable (String, String, Sendable...) -> Void
 
-        fileprivate static var closure: Closure = defaultClosure
+        fileprivate final class State: @unchecked Sendable {
+
+            var closure: Closure {
+                get { lock.withLock { _closure } }
+                set { lock.withLock { _closure = newValue } }
+            }
+
+            private let lock = Lock()
+            private var _closure: Closure = defaultClosure
+
+            init() {}
+        }
+
+        fileprivate static let state = State()
 
         private static let defaultClosure: Closure = {
             Swift.print($2, separator: $0, terminator: $1)
         }
 
         static func replace(with closure: @escaping Closure) {
-            self.closure = closure
+            self.state.closure = closure
         }
 
         static func restore() {
-            closure = defaultClosure
+            state.closure = defaultClosure
         }
     }
     #endif
 
-    static func print(_ items: Any..., separator: String = " ", terminator: String = "\n") {
+    static func print(_ items: Sendable..., separator: String = " ", terminator: String = "\n") {
         #if DEBUG
-        Print.closure(separator, terminator, items)
+        Print.state.closure(separator, terminator, items)
         #else
         Swift.print(items, separator: separator, terminator: terminator)
         #endif

Sources/RequestDL/Internals/Extensions/Override/Internals.Override.Print.swift

@@ -8,28 +8,41 @@ extension Internals.Override {
 
     #if DEBUG
     enum Raise {
-        typealias Closure = (Int32) -> Int32
+        typealias Closure = @Sendable (Int32) -> Int32
 
-        fileprivate static var closure: Closure = defaultClosure
+        fileprivate final class State: @unchecked Sendable {
+
+            var closure: Closure {
+                get { lock.withLock { _closure } }
+                set { lock.withLock { _closure = newValue } }
+            }
+
+            private let lock = Lock()
+            private var _closure: Closure = defaultClosure
+
+            init() {}
+        }
+
+        fileprivate static let state = State()
 
         private static let defaultClosure: Closure = {
             Foundation.raise($0)
         }
 
         static func replace(with closure: @escaping Closure) {
-            self.closure = closure
+            self.state.closure = closure
         }
 
         static func restore() {
-            closure = defaultClosure
+            state.closure = defaultClosure
         }
     }
     #endif
 
     @discardableResult
     static func raise(_ value: Int32) -> Int32 {
         #if DEBUG
-        Raise.closure(value)
+        Raise.state.closure(value)
         #else
         Foundation.raise(value)
         #endif

Sources/RequestDL/Internals/Extensions/Override/Internals.Override.Raise.swift

@@ -66,7 +66,7 @@ extension Internals {
                 return writer.write(.byteBuffer(.init()))
             }
 
-            return first.flatMapWithEventLoop {
+            return first.flatMapWithEventLoop { [sequence] in
                 consume(iterator: sequence, eventLoop: $1)
             }
         }

Sources/RequestDL/Internals/Sources/Body/Internals.Body.swift

@@ -8,7 +8,7 @@ import AsyncHTTPClient
 
 extension Internals {
 
-    struct UnsafeTask<Element>: Sendable, Hashable {
+    struct UnsafeTask<Element: Sendable>: Sendable, Hashable {
 
         fileprivate final class RunningState: @unchecked Sendable {
             var isRunning = true
@@ -23,7 +23,7 @@ extension Internals {
 
         init(
             _ task: HTTPClient.Task<Element>,
-            completion: @escaping () -> Void
+            completion: @Sendable @escaping () -> Void
         ) {
             let lock = Lock()
             let runningState = RunningState()