common

func ArnRegion ¶

func ArnRegion(arn string) string

func FailurePhysicalResourceId ¶

func FailurePhysicalResourceId(event cfn.Event) string

The most important data in the error response to cloudformation is the `PhysicalResourceId` that is stored by cloudformation to identify the resources that have been created. The `PhysicalResourceId` must always be created even in case of creation failure as cloudformation generates a random one if non is supplied. If a resource needs many API calls to be completely generated, it is very important to send the correct `PhysicalResourceId` even in case of failure as cloudformation will send a delete event when the stack is deleted respectively rollbacked.

It is important to create a failure id for graceful NOP when deleting a resource that has failed to create. To gracefully handle these cases, we define the following helper functions.

func IsFailurePhysicalResourceId ¶

func IsFailurePhysicalResourceId(id string) bool

func IsSameRegion ¶

func IsSameRegion(event cfn.Event, oldRegion, region string) bool