AWS SAM Support

[oharaandrew314]

Currently, I have my build tool download python and the aws cli to deploy my SAM template. My current deploy task looks like:

task packageSam(dependsOn: getTasksByName("shadowJar", true)) {
    doLast {
        exec {
            commandLine "aws", "cloudformation", "package", "--template-file", "service.yml", "--s3-bucket", deploymentBucketName, "--output-template-file", "service-out.yml"
        }
    }
}

task deploy(dependsOn: packageSam) {
    doLast {
        exec {
            commandLine "aws", "cloudformation", "deploy", "--template-file", "service-out.yml", "--stack-name", "my-service", "--parameter-overrides", "Stage=latest", "--capabilities", "CAPABILITY_IAM"
        }
    }
}

I think I'd be able to use this tool and eliminate the aws cli if it supported the cloudformation package and cloudformation deploy commands.

[ericraymond]

+1

[aaronp-hd]

I believe cloudformation package part can currently be replicated using the existing AmazonS3FileUploadTask, Gradle variables and CloudFormation parameters. For example, in my case I read an S3 bucket name and key from config, upload code for a Lambda function to S3 using the AmazonS3FileUploadTask with the given bucket and key, and pass the same key and bucket as CloudFormation parameters when deploying using awsCfnMigrateStack.

The cloudformation package command creates and executes a change set, which is required for templates containing transforms. I've added a similar Gradle task that does the same here: https://github.com/classmethod/gradle-aws-plugin/pull/146. I've done some testing and it works well for my use cases; would be good if others could take a look.