Move to FoundationEssentials (#59)

Uses `FoundationEssentials` instead of `Foundation`. Also removes
`NIOFoundationCompat`, because it did appear to be used, and that pulled
in the entire Foundation.

Also disabled the default traits for the `OpenAPIRuntime` to prevent
linking Foundation.

.licenseignore

@@ -18,7 +18,9 @@
 Package.swift
 **/Package.swift
 Package@-*.swift
+Package@swift-*.swift
 **/Package@-*.swift
+**/Package@swift-*.swift
 Package.resolved
 **/Package.resolved
 Makefile

.swiftformatignore

@@ -1 +1,2 @@
 **Package.swift
+**Package@swift-*.swift

Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version:6.0
+// swift-tools-version:6.1
 //===----------------------------------------------------------------------===//
 //
 // This source file is part of the SwiftOpenAPIGenerator open source project
@@ -29,7 +29,7 @@ let package = Package(
     dependencies: [
         .package(url: "https://github.com/apple/swift-nio", from: "2.58.0"),
         .package(url: "https://github.com/swift-server/async-http-client.git", from: "1.23.0"),
-        .package(url: "https://github.com/apple/swift-openapi-runtime", from: "1.0.0"),
+        .package(url: "https://github.com/apple/swift-openapi-runtime", from: "1.11.0", traits: []),
         .package(url: "https://github.com/apple/swift-http-types", from: "1.0.0"),
     ],
     targets: [
@@ -39,7 +39,6 @@ let package = Package(
                 .product(name: "OpenAPIRuntime", package: "swift-openapi-runtime"),
                 .product(name: "HTTPTypes", package: "swift-http-types"),
                 .product(name: "AsyncHTTPClient", package: "async-http-client"),
-                .product(name: "NIOFoundationCompat", package: "swift-nio"),
             ],
             swiftSettings: swiftSettings
         ),

Package@swift-6.0.swift

@@ -0,0 +1,64 @@
+// swift-tools-version:6.0
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the SwiftOpenAPIGenerator open source project
+//
+// Copyright (c) 2023 Apple Inc. and the SwiftOpenAPIGenerator project authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+// See CONTRIBUTORS.txt for the list of SwiftOpenAPIGenerator project authors
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
+import Foundation
+import PackageDescription
+
+// General Swift-settings for all targets.
+let swiftSettings: [SwiftSetting] = [
+    // https://github.com/apple/swift-evolution/blob/main/proposals/0335-existential-any.md
+    // Require `any` for existential types.
+    .enableUpcomingFeature("ExistentialAny")
+]
+
+let package = Package(
+    name: "swift-openapi-async-http-client",
+    platforms: [.macOS(.v10_15), .iOS(.v13), .tvOS(.v13), .watchOS(.v6), .visionOS(.v1)],
+    products: [.library(name: "OpenAPIAsyncHTTPClient", targets: ["OpenAPIAsyncHTTPClient"])],
+    dependencies: [
+        .package(url: "https://github.com/apple/swift-nio", from: "2.58.0"),
+        .package(url: "https://github.com/swift-server/async-http-client.git", from: "1.23.0"),
+        .package(url: "https://github.com/apple/swift-openapi-runtime", from: "1.0.0"),
+        .package(url: "https://github.com/apple/swift-http-types", from: "1.0.0"),
+    ],
+    targets: [
+        .target(
+            name: "OpenAPIAsyncHTTPClient",
+            dependencies: [
+                .product(name: "OpenAPIRuntime", package: "swift-openapi-runtime"),
+                .product(name: "HTTPTypes", package: "swift-http-types"),
+                .product(name: "AsyncHTTPClient", package: "async-http-client"),
+            ],
+            swiftSettings: swiftSettings
+        ),
+        .testTarget(
+            name: "OpenAPIAsyncHTTPClientTests",
+            dependencies: ["OpenAPIAsyncHTTPClient"],
+            swiftSettings: swiftSettings
+        ),
+    ]
+)
+
+// ---    STANDARD CROSS-REPO SETTINGS DO NOT EDIT   --- //
+for target in package.targets {
+    switch target.type {
+    case .regular, .test, .executable:
+        var settings = target.swiftSettings ?? []
+        // https://github.com/swiftlang/swift-evolution/blob/main/proposals/0444-member-import-visibility.md
+        settings.append(.enableUpcomingFeature("MemberImportVisibility"))
+        target.swiftSettings = settings
+    case .macro, .plugin, .system, .binary: ()  // not applicable
+    @unknown default: ()  // we don't know what to do here, do nothing
+    }
+}// --- END: STANDARD CROSS-REPO SETTINGS DO NOT EDIT --- //

Sources/OpenAPIAsyncHTTPClient/AsyncHTTPClientTransport.swift

@@ -15,15 +15,14 @@ import OpenAPIRuntime
 import AsyncHTTPClient
 import NIOCore
 import NIOHTTP1
-import NIOFoundationCompat
 import HTTPTypes
-#if canImport(Darwin)
-import Foundation
+#if canImport(FoundationEssentials)
+@preconcurrency import struct FoundationEssentials.URL
+import struct FoundationEssentials.URLComponents
+import struct FoundationEssentials.Data
+import protocol FoundationEssentials.LocalizedError
 #else
-@preconcurrency import struct Foundation.URL
-import struct Foundation.URLComponents
-import struct Foundation.Data
-import protocol Foundation.LocalizedError
+import Foundation
 #endif
 
 /// A client transport that performs HTTP operations using the HTTPClient type