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# https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/walkthrough-custom-resources-lambda-lookup-amiids.html
def get_template(lambda_code):
return {
"AWSTemplateFormatVersion": "2010-09-09",
"Description": "Sample template using Custom Resource",
"Resources": {
"CustomInfo": {
"Type": "Custom::Info",
"Properties": {
"ServiceToken": {"Fn::GetAtt": ["InfoFunction", "Arn"]},
"Region": {"Ref": "AWS::Region"},
"MyProperty": "stuff",
},
},
"InfoFunction": {
"Type": "AWS::Lambda::Function",
"Properties": {
"Code": {
"ZipFile": {"Fn::Join": ["\n", lambda_code.splitlines()]},
},
"Handler": "index.lambda_handler",
"Role": {"Fn::GetAtt": ["LambdaExecutionRole", "Arn"]},
"Runtime": "python3.8",
"Timeout": "30",
},
},
"LambdaExecutionRole": {
"Type": "AWS::IAM::Role",
"Properties": {
"AssumeRolePolicyDocument": {
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Principal": {"Service": ["lambda.amazonaws.com"]},
"Action": ["sts:AssumeRole"],
}
],
},
"Path": "/",
"Policies": [
{
"PolicyName": "root",
"PolicyDocument": {
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"logs:CreateLogGroup",
"logs:CreateLogStream",
"logs:PutLogEvents",
],
"Resource": "arn:aws:logs:*:*:*",
}
],
},
}
],
},
},
},
"Outputs": {
"infokey": {
"Description": "A very important value",
"Value": {"Fn::GetAtt": ["CustomInfo", "info_value"]},
}
},
}
def get_template_for_unknown_lambda():
return {
"AWSTemplateFormatVersion": "2010-09-09",
"Description": "Sample template using Custom Resource pointing to unknown Function",
"Resources": {
"CustomInfo": {
"Type": "Custom::Info",
"Properties": {"ServiceToken": {"Fn::GetAtt": ["InfoFunction", "Arn"]}},
},
},
}
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