template.yaml

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: Hugo-Lambda
Globals:
    Function:
        Timeout: 60
        MemorySize: 512

Parameters:
    LayersBucketName:
        Type: String
    HugoLayerKey:
        Type: String
    LibstdcLayerKey:
        Type: String
    AWSCLILayerKey:
        Type: String

Resources:
    HugoLambdaFunction:
        Type: AWS::Serverless::Function
        Properties:
            CodeUri: app/
            Handler: app.lambda_handler
            Runtime: python3.7
            Layers:
                - !Ref HugoLayer
                - !Ref LibstdcLayer
                - !Ref AWSCLILayer
            Policies:
                - S3CrudPolicy:
                    BucketName: !Ref SourceS3Bucket
                - S3CrudPolicy:
                    BucketName: !Ref WebsiteS3Bucket
            Environment:
                Variables:
                    SOURCE_PATH: !Ref SourceS3Bucket
                    DESTINATION_BUCKET: !Ref WebsiteS3Bucket
            Events:
                BuildApi:
                    Type: Api
                    Properties:
                        Path: /build
                        Method: get

    SourceS3Bucket:
        Type: AWS::S3::Bucket
        DeletionPolicy: Retain

    WebsiteS3Bucket:
        Type: AWS::S3::Bucket
        Properties:
            AccessControl: PublicRead
            WebsiteConfiguration:
                IndexDocument: index.html
                ErrorDocument: 404.html
        DeletionPolicy: Retain

    WebsiteS3BucketPolicy:
        Type: AWS::S3::BucketPolicy
        Properties:
            PolicyDocument:
                Id: WebsiteS3BucketPolicy
                Version: 2012-10-17
                Statement:
                    - Sid: PublicReadForGetBucketObjects
                      Effect: Allow
                      Principal: '*'
                      Action: 's3:GetObject'
                      Resource: !Join ['',['arn:aws:s3:::',!Ref WebsiteS3Bucket,/*]]
            Bucket: !Ref WebsiteS3Bucket

    HugoLayer:
        Type: "AWS::Lambda::LayerVersion"
        Properties:
            CompatibleRuntimes: 
                - python3.6
                - python3.7
            Content: 
                S3Bucket: !Ref LayersBucketName
                S3Key: !Ref HugoLayerKey
            Description: Contains Hugo
            LayerName: Hugo
    
    LibstdcLayer:
        Type: "AWS::Lambda::LayerVersion"
        Properties:
            CompatibleRuntimes: 
                - python3.6
                - python3.7
            Content: 
                S3Bucket: !Ref LayersBucketName
                S3Key: !Ref LibstdcLayerKey
            Description: Contains libstdc++.so.6
            LayerName: libstdc
    
    AWSCLILayer:
        Type: "AWS::Lambda::LayerVersion"
        Properties:
            CompatibleRuntimes: 
                - python3.6
                - python3.7
            Content: 
                S3Bucket: !Ref LayersBucketName
                S3Key: !Ref AWSCLILayerKey
            Description: Contains AWSCLI
            LayerName: AWSCLI

Outputs:
    WebsiteS3Bucket:
        Value: !Ref WebsiteS3Bucket

    WebsiteS3BucketURL:
        Value: !GetAtt WebsiteS3Bucket.WebsiteURL
    
    SourceS3Bucket:
        Value: !Ref SourceS3Bucket

    BuildApi:
        Value: !Sub "https://${ServerlessRestApi}.execute-api.${AWS::Region}.amazonaws.com/Prod/build/"

    HugoLambdaFunctionArn:
        Value: !GetAtt HugoLambdaFunction.Arn
    
    HugoLayerArn:
        Value: !Ref HugoLayer