anchor.diff:    options:
   <% if p('blobstore.provider') == 's3' %>
       bucket_name: <%= p('blobstore.bucket_name') %>
  -    credentials_source: <%= p('blobstore.credentials_source') %>
  +    credentials_source: <%= p('blobstore.credentials_source', 'static') %>
       access_key_id: <%= p('blobstore.access_key_id', nil) %>
       secret_access_key: <%= p('blobstore.secret_access_key', nil) %>
   
  
positive.code:   provider: s3
    options:
      bucket_name: <%= bucket_name %>
      credentials_source: <%= p('compiled_package_cache.options.credentials_source') %>
      access_key_id: <%= p('compiled_package_cache.options.access_key_id', nil) %>
      secret_access_key: <%= p('compiled_package_cache.options.secret_access_key', nil) %>
  <% if_p('compiled_package_cache.options.s3_port') do |port| %>
  
negative.code:   plugin: aws <% plugin = "aws" %>
    properties:
      aws:
        credentials_source: <%= p('aws.credentials_source', 'static') %>
        access_key_id: <%= p('aws.access_key_id', nil) %>
        secret_access_key: <%= p('aws.secret_access_key', nil) %>
        default_iam_instance_profile: <%= p('aws.default_iam_instance_profile', nil) %>
  