Very Basic Swift Lambda

build_for_aws.sh

#!/bin/sh

#build for amazon linux
sudo docker run \
    --rm \
    --volume "$(pwd)/:/src" \
    --workdir "/src/" \
    swift:5.3.1-amazonlinux2 \
    swift build --product MyLambda -c release -Xswiftc -static-stdlib

#enter build folder
cd .build

#enter release folder
cd release

#recreate symlink
rm bootstrap
ln -s "MyLambda" "bootstrap"

# zip release folder including symlinks
sudo zip --symlinks release.zip *

#upload to s3 bucket
aws s3 cp release.zip s3://jwamin-code-bucket

#update lambda code
aws lambda update-function-code --function-name swiftHello --s3-bucket=jwamin-code-bucket --s3-key=release.zip

#test lambda
curl https://8fm9bmgrg6.execute-api.us-east-1.amazonaws.com/default/swiftHello -H 'Accept: text/plain' -H 'Content-Type: text/plain' --header 'x-api-key: <API_KEY>' --request POST -d "jossy"

main.swift

import Foundation
import AWSLambdaRuntime
import AWSLambdaEvents

// in this example we are receiving and responding with strings
Lambda.run { (context, event: APIGateway.Request, callback: @escaping (Result<APIGateway.Response, Error>) -> Void) in

  let response = APIGateway.Response(statusCode:.ok,body: "Hello, \(event.body ?? "default")")
  callback(.success(response))

}