def copy_source()

in source/helper/website_helper.py [0:0]
45 lines of code
7 McCabe index (conditional complexity)

def copy_source(event, context):
    try:
        source_bucket = event["ResourceProperties"]["WebsiteCodeBucket"]
        source_key = event["ResourceProperties"]["WebsiteCodePrefix"]
        website_bucket = event["ResourceProperties"]["DeploymentBucket"].split('.')[0]
    except KeyError as e:
        LOGGER.info("Failed to retrieve required values from the CloudFormation event: {e}".format(e=e))
        send_response(event, context, "FAILED", {"Message": "Failed to retrieve required values from the CloudFormation event"})
    else:
        try:
            LOGGER.info("Checking if custom environment variables are present")

            try:
                FileManagerAPIEndpoint = os.environ['FileManagerAPIEndpoint']
                region = os.environ['AwsRegion']
                user_pool_id = os.environ['UserPoolId']
                client_id = os.environ['PoolClientId']
                identity_id = os.environ['IdentityPoolId']
            except KeyError:
                replace_env_variables = False
            else:
                new_variables = {"fileManagerApiUrl": FileManagerAPIEndpoint, "awsRegion": region,
                                 "userPoolId": user_pool_id, "userPoolIdClientId": client_id, "identityPoolId": identity_id}

                replace_env_variables = True
                LOGGER.info(
                    "New variables: {v}".format(v=new_variables))

                deployment_bucket = s3.Bucket(website_bucket)

                with open('./webapp-manifest.json') as file:
                    manifest = json.load(file)
                    print('UPLOADING FILES::')
                    for key in manifest:
                        print('s3://'+source_bucket+'/'+source_key+'/'+key)
                        copy_source = {
                            'Bucket': source_bucket,
                            'Key': source_key+'/'+key
                        }
                        s3.meta.client.copy(copy_source, website_bucket, key)
                        if replace_env_variables is True and key == "runtimeConfig.json":
                            LOGGER.info("updating runtimeConfig.json")
                            write_to_s3(event, context, website_bucket, key, json.dumps(new_variables))

        except Exception as e:
            LOGGER.info("Unable to copy website source code into the website bucket: {e}".format(e=e))
            send_response(event, context, "FAILED", {"Message": "Unexpected event received from CloudFormation"})
        else:
            send_response(event, context, "SUCCESS",
                          {"Message": "Resource creation successful!"})