Class: SchemaGenerator

Inherits:
Object
  • Object
show all
Defined in:
lib/cfn-model/validator/schema_generator.rb

Overview

This generator is a bit of hacking to trick kwalify into validating yaml for a cfn template.

because cfn uses open-ended key names for the resources.… a static schema can’t be used with kwalify. so first we make sure there is a basic structure of resources with Type values then we generate the schema from the document for the keys and cross-reference with schema files per resource type

Instance Method Summary collapse

Instance Method Details

#generate(cloudformation_yml) ⇒ Object 



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# File 'lib/cfn-model/validator/schema_generator.rb', line 14

def generate(cloudformation_yml)

  # make sure structure of Resources is decent and that every record has a Type at least
  cloudformation_hash = ResourceTypeValidator.validate cloudformation_yml

  parameters_schema = generate_schema_for_parameter_keys cloudformation_hash
  resources_schema = generate_schema_for_resource_keys cloudformation_hash

  main_schema = YAML.safe_load IO.read(schema_file('schema.yml.erb'))
  if parameters_schema.empty?
    main_schema['mapping'].delete 'Parameters'
  else
    main_schema['mapping']['Parameters']['mapping'] = parameters_schema
  end
  main_schema['mapping']['Resources']['mapping'] = resources_schema
  main_schema
end