source/infrastructure/cloudformation/cfn-eventbus.yaml

AWSTemplateFormatVersion: 2010-09-09
Description: CDF EventBridge custom bus

Parameters:
  Environment:
    Description:  Name of environment.  Used to name the created resources.
    Type: String
    MinLength: 1
  
  ExistingEventBusArn:
    Description: Arn of an existing eventbus to use instead of creating one.
    Type: String

Conditions:
  Deploy: !Equals [ !Ref ExistingEventBusArn, '' ]

Resources:

  EventBus: 
    Condition: Deploy
    Type: AWS::Events::EventBus
    Properties: 
      Name: !Sub 'cdf-${Environment}'

Outputs:
  EventBusArn:
    Description: EventBusArn
    Value: !If [ Deploy, !GetAtt EventBus.Arn, !Ref ExistingEventBusArn]
    Export:
      Name: !Sub 'cdf-${Environment}-eventbus'