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[doc] add a deployment guide and update the readme (#432)
As discussed with @0xTim This PR - adds a minimal example of deployment using SAM in the README - adds a `Deployment.md` Swift Docc file to cover deployment with the AWS console, CLI, SAM, and CDK. It mentions and contains a call to contributions to further examples for third-party tools such as the Serverless Framework, Terraform, or Pulumi.
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‎Examples/_MyFirstFunction/.gitignore‎

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.DS_Store
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/.build
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/Packages
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xcuserdata/
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DerivedData/
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.swiftpm/configuration/registries.json
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.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
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.netrc

‎Examples/_MyFirstFunction/clean.sh‎

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#!/bin/bash
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##===----------------------------------------------------------------------===##
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##
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## This source file is part of the SwiftAWSLambdaRuntime open source project
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##
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## Copyright (c) 2017-2024 Apple Inc. and the SwiftAWSLambdaRuntime project authors
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## Licensed under Apache License v2.0
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##
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## See LICENSE.txt for license information
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## See CONTRIBUTORS.txt for the list of SwiftAWSLambdaRuntime project authors
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##
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## SPDX-License-Identifier: Apache-2.0
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##
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##===----------------------------------------------------------------------===##
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echo "This script deletes the Lambda function and the IAM role created in the previous step and deletes the project files."
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read -r -p "Are you you sure you want to delete everything that was created? [y/n] " continue
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if [[ ! $continue =~ ^[Yy]$ ]]; then
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echo "OK, try again later when you feel ready"
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exit 1
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fi
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echo "🚀 Deleting the Lambda function and the role"
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aws lambda delete-function --function-name MyLambda
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aws iam detach-role-policy \
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--role-name lambda_basic_execution \
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--policy-arn arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole
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aws iam delete-role --role-name lambda_basic_execution
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echo "🚀 Deleting the project files"
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rm -rf .build
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rm -rf ./Sources
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rm trust-policy.json
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rm Package.swift Package.resolved
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echo "🎉 Done! Your project is cleaned up and ready for a fresh start."

‎Examples/_MyFirstFunction/create_and_deploy_function.sh‎

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#!/bin/bash
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##===----------------------------------------------------------------------===##
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##
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## This source file is part of the SwiftAWSLambdaRuntime open source project
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##
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## Copyright (c) 2017-2024 Apple Inc. and the SwiftAWSLambdaRuntime project authors
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## Licensed under Apache License v2.0
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##
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## See LICENSE.txt for license information
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## See CONTRIBUTORS.txt for the list of SwiftAWSLambdaRuntime project authors
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##
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## SPDX-License-Identifier: Apache-2.0
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##
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##===----------------------------------------------------------------------===##
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# Stop the script execution if an error occurs
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set -e -o pipefail
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check_prerequisites() {
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# check if docker is installed
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which docker > /dev/null || (echo "Docker is not installed. Please install Docker and try again." && exit 1)
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# check if aws cli is installed
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which aws > /dev/null || (echo "AWS CLI is not installed. Please install AWS CLI and try again." && exit 1)
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# check if user has an access key and secret access key
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echo "This script creates and deploys a Lambda function on your AWS Account.
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You must have an AWS account and know an AWS access key, secret access key, and an optional session token.
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These values are read from '~/.aws/credentials'.
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"
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read -r -p "Are you ready to create your first Lambda function in Swift? [y/n] " continue
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if [[ ! $continue =~ ^[Yy]$ ]]; then
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echo "OK, try again later when you feel ready"
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exit 1
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fi
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}
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create_lambda_execution_role() {
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role_name=$1
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# Allow the Lambda service to assume the IAM role
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cat <<EOF > trust-policy.json
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{
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"Version": "2012-10-17",
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"Statement": [
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{
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"Effect": "Allow",
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"Principal": {
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"Service": "lambda.amazonaws.com"
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},
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"Action": "sts:AssumeRole"
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}
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]
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}
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EOF
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# Create the IAM role
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echo "🔐 Create the IAM role for the Lambda function"
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aws iam create-role \
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--role-name "${role_name}" \
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--assume-role-policy-document file://trust-policy.json > /dev/null 2>&1
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# Attach basic permissions to the role
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# The AWSLambdaBasicExecutionRole policy grants permissions to write logs to CloudWatch Logs
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echo "🔒 Attach basic permissions to the role"
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aws iam attach-role-policy \
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--role-name "${role_name}" \
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--policy-arn arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole > /dev/null 2>&1
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echo "⏰ Waiting 10 secs for IAM role to propagate..."
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sleep 10
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}
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create_swift_project() {
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echo "⚡️ Create your Swift Lambda project"
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swift package init --type executable --name MyLambda > /dev/null
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echo "📦 Add the AWS Lambda Swift runtime to your project"
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# The following commands are commented out until the `lambad-init` plugin will be release
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# swift package add-dependency https://github.com/swift-server/swift-aws-lambda-runtime.git --branch main
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# swift package add-dependency https://github.com/swift-server/swift-aws-lambda-events.git --branch main
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# swift package add-target-dependency AWSLambdaRuntime MyLambda --package swift-aws-lambda-runtime
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# swift package add-target-dependency AWSLambdaEvents MyLambda --package swift-aws-lambda-events
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cat <<EOF > Package.swift
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// swift-tools-version:6.0
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import PackageDescription
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let package = Package(
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name: "swift-aws-lambda-runtime-example",
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platforms: [.macOS(.v15)],
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products: [
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.executable(name: "MyLambda", targets: ["MyLambda"])
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],
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dependencies: [
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.package(url: "https://github.com/swift-server/swift-aws-lambda-runtime.git", branch: "main")
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],
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targets: [
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.executableTarget(
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name: "MyLambda",
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dependencies: [
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.product(name: "AWSLambdaRuntime", package: "swift-aws-lambda-runtime")
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],
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path: "."
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)
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]
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)
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EOF
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echo "📝 Write the Swift code"
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# The following command is commented out until the `lambad-init` plugin will be release
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# swift package lambda-init --allow-writing-to-package-directory
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cat <<EOF > Sources/main.swift
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import AWSLambdaRuntime
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let runtime = LambdaRuntime {
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(event: String, context: LambdaContext) in
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"Hello \(event)"
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}
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try await runtime.run()
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EOF
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echo "📦 Compile and package the function for deployment (this might take a while)"
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swift package archive --allow-network-connections docker > /dev/null 2>&1
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}
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deploy_lambda_function() {
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echo "🚀 Deploy to AWS Lambda"
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# retrieve your AWS Account ID
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echo "🔑 Retrieve your AWS Account ID"
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AWS_ACCOUNT_ID=$(aws sts get-caller-identity --query Account --output text)
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export AWS_ACCOUNT_ID
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# Check if the role already exists
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echo "🔍 Check if a Lambda execution IAM role already exists"
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aws iam get-role --role-name lambda_basic_execution > /dev/null 2>&1 || create_lambda_execution_role lambda_basic_execution
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# Create the Lambda function
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echo "🚀 Create the Lambda function"
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aws lambda create-function \
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--function-name MyLambda \
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--zip-file fileb://.build/plugins/AWSLambdaPackager/outputs/AWSLambdaPackager/MyLambda/MyLambda.zip \
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--runtime provided.al2 \
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--handler provided \
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--architectures "$(uname -m)" \
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--role arn:aws:iam::"${AWS_ACCOUNT_ID}":role/lambda_basic_execution > /dev/null 2>&1
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echo "⏰ Waiting 10 secs for the Lambda function to be ready..."
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sleep 10
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}
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invoke_lambda_function() {
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# Invoke the Lambda function
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echo "🔗 Invoke the Lambda function"
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aws lambda invoke \
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--function-name MyLambda \
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--cli-binary-format raw-in-base64-out \
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--payload '"Lambda Swift"' \
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output.txt > /dev/null 2>&1
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echo "👀 Your Lambda function returned:"
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cat output.txt && rm output.txt
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}
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main() {
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#
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# Check prerequisites
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#
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check_prerequisites
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#
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# Create the Swift project
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#
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create_swift_project
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#
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# Now the function is ready to be deployed to AWS Lambda
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#
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deploy_lambda_function
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#
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# Invoke the Lambda function
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#
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invoke_lambda_function
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echo ""
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echo "🎉 Done! Your first Lambda function in Swift is now deployed on AWS Lambda. 🚀"
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}
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main "$@"

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