async/await support (#186)

- Add an `AsyncLambdaHandler`. Will be renamed to `LambdaHandler` as soon as we drop the current callback based `LambdaHandler`.
- The default way to use an `AsyncLambdaHandler` is to use `@main` to execute it. Don't use `Lambda.run` for it. We wan't to remove `Lambda.run` for 1.0.

Co-authored-by: tomer doron <[email protected]>

Author: fabianfett

Package.swift

@@ -15,7 +15,7 @@ let package = Package(
         .library(name: "AWSLambdaTesting", targets: ["AWSLambdaTesting"]),
     ],
     dependencies: [
-        .package(url: "https://github.com/apple/swift-nio.git", .upToNextMajor(from: "2.26.0")),
+        .package(url: "https://github.com/apple/swift-nio.git", .upToNextMajor(from: "2.28.0")),
         .package(url: "https://github.com/apple/swift-log.git", .upToNextMajor(from: "1.0.0")),
         .package(url: "https://github.com/swift-server/swift-backtrace.git", .upToNextMajor(from: "1.1.0")),
     ],
@@ -29,6 +29,7 @@ let package = Package(
             .product(name: "Logging", package: "swift-log"),
             .product(name: "Backtrace", package: "swift-backtrace"),
             .product(name: "NIOHTTP1", package: "swift-nio"),
+            .product(name: "_NIOConcurrency", package: "swift-nio"),
         ]),
         .testTarget(name: "AWSLambdaRuntimeCoreTests", dependencies: [
             .byName(name: "AWSLambdaRuntimeCore"),

docker/docker-compose.al2.main.yaml

@@ -10,9 +10,14 @@ services:
 
   test:
     image: swift-aws-lambda:al2-main
+    command: /bin/bash -cl "swift test --enable-test-discovery -Xswiftc -warnings-as-errors $${SANITIZER_ARG-} -Xswiftc -Xfrontend -Xswiftc -enable-experimental-concurrency"
 
   test-samples:
     image: swift-aws-lambda:al2-main
+    command: >-
+      /bin/bash -clx "
+      swift build -Xswiftc -Xfrontend -Xswiftc -enable-experimental-concurrency --package-path Examples/LambdaFunctions &&
+      swift build -Xswiftc -Xfrontend -Xswiftc -enable-experimental-concurrency --package-path Examples/LocalDebugging/MyLambda"
 
   shell:
     image: swift-aws-lambda:al2-main