Add support for streaming on recent Darwin platforms

Author: simonjbeaumont

NOTICE.txt

@@ -32,3 +32,21 @@ This product contains derivations of various scripts from SwiftNIO.
     * https://www.apache.org/licenses/LICENSE-2.0
   * HOMEPAGE:
     * https://github.com/apple/swift-nio
+
+-------------------------------------------------------------------------------
+
+This product contains AsyncSequence implementations from Swift Async Algorithms.
+
+  * LICENSE (Apache License 2.0):
+    * https://github.com/apple/swift-async-algorithms/blob/main/LICENSE.txt
+  * HOMEPAGE:
+    * https://github.com/apple/swift-async-algorithms
+
+-------------------------------------------------------------------------------
+
+This product contains AsyncSequence implementations from Swift.
+
+  * LICENSE (Apache License 2.0):
+    * https://github.com/apple/swift/blob/main/LICENSE.txt
+  * HOMEPAGE:
+    * https://github.com/apple/swift

Package.swift

@@ -24,8 +24,16 @@ swiftSettings.append(
     // Require `any` for existential types.
     .enableUpcomingFeature("ExistentialAny")
 )
+
+// Strict concurrency is enabled in CI; use this environment variable to enable it locally.
+if ProcessInfo.processInfo.environment["SWIFT_OPENAPI_STRICT_CONCURRENCY"].flatMap(Bool.init) ?? false {
+    swiftSettings.append(contentsOf: [
+        .define("SWIFT_OPENAPI_STRICT_CONCURRENCY"), .enableExperimentalFeature("StrictConcurrency"),
+    ])
+}
 #endif
 
+
 let package = Package(
     name: "swift-openapi-urlsession",
     platforms: [
@@ -40,19 +48,29 @@ let package = Package(
     dependencies: [
         .package(url: "https://github.com/apple/swift-openapi-runtime", .upToNextMinor(from: "0.3.0")),
         .package(url: "https://github.com/apple/swift-docc-plugin", from: "1.0.0"),
+        .package(url: "https://github.com/apple/swift-collections", from: "1.0.0"),
     ],
     targets: [
         .target(
             name: "OpenAPIURLSession",
             dependencies: [
+                .product(name: "DequeModule", package: "swift-collections"),
                 .product(name: "OpenAPIRuntime", package: "swift-openapi-runtime"),
             ],
             swiftSettings: swiftSettings
         ),
         .testTarget(
             name: "OpenAPIURLSessionTests",
-            dependencies: ["OpenAPIURLSession"],
+            dependencies: [
+                "OpenAPIURLSession",
+                .product(name: "NIOTestUtils", package: "swift-nio"),
+            ],
             swiftSettings: swiftSettings
         ),
     ]
 )
+
+// Test-only dependencies.
+package.dependencies += [
+    .package(url: "https://github.com/apple/swift-nio", from: "2.62.0")
+]

README.md

@@ -9,9 +9,14 @@ A client transport that uses the [URLSession](https://developer.apple.com/docume
 Use the transport with client code generated by [Swift OpenAPI Generator](https://github.com/apple/swift-openapi-generator).
 
 ## Supported platforms and minimum versions
- | macOS | Linux | iOS | tvOS | watchOS |
- | :-: | :-: | :-: | :-: | :-: |
- | ✅ 10.15+ | ✅ | ✅ 13+ | ✅ 13+ | ✅ 6+ |
+
+| macOS     | Linux | iOS    | tvOS   | watchOS |
+| :-:       | :-:   | :-:    | :-:    | :-:     |
+| ✅ 10.15+ | ✅    | ✅ 13+ | ✅ 13+ | ✅ 6+   |
+
+Note: Streaming support only available on macOS 12+, iOS 15+, tvOS 15+, and
+watchOS 8+.For streaming support on Linux, please use the [AsyncHTTPClient
+Transport](https://github.com/swift-server/swift-openapi-async-http-client)
 
 ## Usage