cloudformation foreach loops

cloudformation-foreach.yaml

# the key is to use &{foo} for resource identifiers, to strip out bad chars

Transform: AWS::LanguageExtensions

Parameters:
  BucketNames:
    Type: CommaDelimitedList

Resources:

  # "for each bucketname in bucketnames..."
  Fn::ForEach::Loop1: # the loop name doesn't matter, but must be unique in the template
    - BucketName
    - !Ref BucketNames
    - "&{BucketName}": # the cloudformation logical resource id
        Type: AWS::S3::Bucket
        Properties:
          BucketName: !Ref BucketName