Add example scripts and docs for Serverless Framework (#113)

* Add example scripts and docs for Serverless Framework
* Refactor Examples folder and scripts
- Add a common config.sh script
- Move SAM templates to scripts/SAM
- Add Serverless templates to scripts/serverless
- Update the scripts to work with new folder structure and config.sh

Author: Andrea-Scuderi

.gitignore

@@ -7,3 +7,4 @@
 .swift-version
 xcuserdata
 Package.resolved
+.serverless

Examples/LambdaFunctions/README.md

@@ -4,6 +4,13 @@ This sample project is a collection of Lambda functions that demonstrates
 how to write a simple Lambda function in Swift, and how to package and deploy it
 to the AWS Lambda platform.
 
+The scripts are prepared to work from the `LambdaFunctions` folder.
+
+```
+git clone https://github.com/swift-server/swift-aws-lambda-runtime.git
+cd swift-aws-lambda-runtime/Examples/LambdaFunctions
+```
+
 Note: The example scripts assume you have [jq](https://stedolan.github.io/jq/download/) command line tool installed.
 
 ## Deployment instructions using AWS CLI
@@ -85,3 +92,86 @@ The SAM template will provide an output labelled `LambdaApiGatewayEndpoint` whic
 ***Warning:*** This SAM template is only intended as a sample and creates a publicly accessible HTTP endpoint.
 
 For all other samples use the AWS Lambda console.
+
+### Deployment instructions using Serverless Framework (serverless.com)
+
+[Serverless framework](https://www.serverless.com/open-source/) (Serverless) is a provider agnostic, open-source framework for building serverless applications. This framework allows you to easily deploy other AWS resources and more complex deployment mechanisms such a CI pipelines. Serverless Framework offers solutions for not only deploying but also testing, monitoring, alerting, and security and is widely adopted by the industry and offers along the open-source version a paid one.
+
+***Note:*** Deploying using Serverless will automatically create resources within your AWS account. Charges may apply for these resources.
+
+To use Serverless to deploy this sample to AWS:
+
+1. Install the AWS CLI by following the [instructions](https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-install.html).
+
+2. Install Serverless by following the [instructions](https://www.serverless.com/framework/docs/getting-started/).
+If you already have installed be sure you have the latest version.
+The examples have been tested with the version 1.72.0.
+
+```
+Serverless --version
+Framework Core: 1.72.0 (standalone)
+Plugin: 3.6.13
+SDK: 2.3.1
+Components: 2.30.12
+```
+
+3. Build, package and deploy the Lambda
+
+  ```
+  ./scripts/serverless-deploy.sh
+  ```
+
+The script will ask you which sample Lambda you wish to deploy.
+
+The `serverless-deploy.sh` script passes through any parameters to the Serverless deploy command.
+
+4. Testing
+
+For the APIGateway sample:
+
+The Serverless template will provide an endpoint which you can use to test the Lambda. 
+
+Outuput example:
+
+```
+...
+...
+Serverless: Stack update finished...
+Service Information
+service: apigateway-swift-aws
+stage: dev
+region: us-east-1
+stack: apigateway-swift-aws-dev
+resources: 12
+api keys:
+  None
+endpoints:
+  GET - https://r39lvhfng3.execute-api.us-east-1.amazonaws.com/api
+functions:
+  httpGet: apigateway-swift-aws-dev-httpGet
+layers:
+  None
+
+Stack Outputs
+HttpGetLambdaFunctionQualifiedArn: arn:aws:lambda:us-east-1:XXXXXXXXX:function:apigateway-swift-aws-dev-httpGet:1
+ServerlessDeploymentBucketName: apigateway-swift-aws-dev-serverlessdeploymentbuck-ud51msgcrj1e
+HttpApiUrl: https://r39lvhfng3.execute-api.us-east-1.amazonaws.com
+```
+
+For example:
+
+  ```
+  curl https://r39lvhfng3.execute-api.us-east-1.amazonaws.com/api
+  ```  
+
+***Warning:*** This Serverless template is only intended as a sample and creates a publicly accessible HTTP endpoint.
+
+For all other samples use the AWS Lambda console.
+
+4. Remove
+
+ ```
+  ./scripts/serverless-remove.sh
+  ```
+
+The script will ask you which sample Lambda you wish to remove from the previous depolyment.

Examples/LambdaFunctions/APIGateway-template.yml renamed to Examples/LambdaFunctions/scripts/SAM/APIGateway-template.yml

@@ -16,14 +16,15 @@
 set -eu
 
 executable=$1
+workspace="$(pwd)/../.."
 
 echo "-------------------------------------------------------------------------"
 echo "building \"$executable\" lambda"
 echo "-------------------------------------------------------------------------"
-docker run --rm -v "$(pwd)/../..":/workspace -w /workspace/Examples/LambdaFunctions builder bash -cl "swift build --product $executable -c release -Xswiftc -g"
+docker run --rm -v "$workspace":/workspace -w /workspace/Examples/LambdaFunctions builder bash -cl "swift build --product $executable -c release -Xswiftc -g"
 echo "done"
 
 echo "-------------------------------------------------------------------------"
 echo "packaging \"$executable\" lambda"
 echo "-------------------------------------------------------------------------"
-docker run --rm -v "$(pwd)/../..":/workspace -w /workspace/Examples/LambdaFunctions builder bash -cl "./scripts/package.sh $executable"
+docker run --rm -v "$workspace":/workspace -w /workspace/Examples/LambdaFunctions builder bash -cl "./scripts/package.sh $executable"

Examples/LambdaFunctions/Benchmark-template.yml renamed to Examples/LambdaFunctions/scripts/SAM/Benchmark-template.yml

@@ -0,0 +1,39 @@
+#!/bin/bash
+##===----------------------------------------------------------------------===##
+##
+## This source file is part of the SwiftAWSLambdaRuntime open source project
+##
+## Copyright (c) 2017-2018 Apple Inc. and the SwiftAWSLambdaRuntime project authors
+## Licensed under Apache License v2.0
+##
+## See LICENSE.txt for license information
+## See CONTRIBUTORS.txt for the list of SwiftAWSLambdaRuntime project authors
+##
+## SPDX-License-Identifier: Apache-2.0
+##
+##===----------------------------------------------------------------------===##
+
+DIR="$(cd "$(dirname "$0")" && pwd)"
+
+executables=( $(swift package dump-package | sed -e 's|: null|: ""|g' | jq '.products[] | (select(.type.executable)) | .name' | sed -e 's|"||g') )
+
+if [[ ${#executables[@]} = 0 ]]; then
+    echo "no executables found"
+    exit 1
+elif [[ ${#executables[@]} = 1 ]]; then
+    executable=${executables[0]}
+elif [[ ${#executables[@]} > 1 ]]; then
+    echo "multiple executables found:"
+    for executable in ${executables[@]}; do
+      echo "  * $executable"
+    done
+    echo ""
+    read -p "select which executables to deploy: " executable
+fi
+
+echo "-------------------------------------------------------------------------"
+echo "CONFIG"
+echo "-------------------------------------------------------------------------"
+echo "DIR: $DIR"
+echo "executable: $executable"
+echo "-------------------------------------------------------------------------"

Examples/LambdaFunctions/CurrencyExchange-template.yml renamed to Examples/LambdaFunctions/scripts/SAM/CurrencyExchange-template.yml

@@ -21,21 +21,10 @@ lambda_name=SwiftSample
 # S3 bucket name to upload zip file (must exist in AWS S3)
 s3_bucket=swift-lambda-test
 
-executables=( $(swift package dump-package | sed -e 's|: null|: ""|g' | jq '.products[] | (select(.type.executable)) | .name' | sed -e 's|"||g') )
+workspace="$(pwd)/../.."
 
-if [[ ${#executables[@]} = 0 ]]; then
-    echo "no executables found"
-    exit 1
-elif [[ ${#executables[@]} = 1 ]]; then
-    executable=${executables[0]}
-elif [[ ${#executables[@]} > 1 ]]; then
-    echo "multiple executables found:"
-    for executable in ${executables[@]}; do
-      echo "  * $executable"
-    done
-    echo ""
-    read -p "select which executables to deploy: " executable
-fi
+DIR="$(cd "$(dirname "$0")" && pwd)"
+source $DIR/config.sh
 
 echo -e "\ndeploying $executable"
 
@@ -47,7 +36,7 @@ docker build . -t builder
 echo "-------------------------------------------------------------------------"
 echo "building \"$executable\" lambda"
 echo "-------------------------------------------------------------------------"
-docker run --rm -v `pwd`/../..:/workspace -w /workspace builder \
+docker run --rm -v $workspace:/workspace -w /workspace builder \
        bash -cl "cd Examples/LambdaFunctions && \
                  swift build --product $executable -c release -Xswiftc -g"
 echo "done"