AWS CloudFormation condition to only execute when running on the master org (root) account?

Question

All,

I am creating a CloudFormation template. I would like to conditionally add an IAM policy only if the template is being run in the root organization's master account.

I searched around but wasn't able to find an example.

This is what I am doing now. I am just asking if the template should include the policy during creation.

"Parameters": {
    "IncludeOrganizationPolicy": {
        "Description": "Only set to true for the root org",
        "Type": "String",
        "Default": "false",
        "AllowedValues": [
            "true",
            "false"
        ]
    },
}

Ideally, I'd like to do this without having to ask for an input parameter. Something like shown below, but where AWS::AccountId is the master root account.

"Conditions": {
    "CreateSPOrganizationPolicy": {
        "Fn::Equals": [
            {
                "Ref": "AWS::AccountId"
            },
            "<the root account id>"
        ]
    }
}

Also, I am unable to hard-code the root account id. These scripts are going to be given to customers to run in their AWS environment.

Thanks!

Pink

Answer 1

This doesn't answer the question, but this question came up on a related search so I thought I'd post what I did.

I wanted to a condition to be true for a single AWS account, so I could create a resource in a single account only. I didn't want to have to use a parameter as I already have a bunch and then I'd have to run the stackset / template again.

Here's the condition that worked

Conditions: 
  Account123Only: !Equals [ !Ref AWS::AccountId, "123123123123"]