Class: CfnParser
- Inherits:
-
Object
- Object
- CfnParser
- Defined in:
- lib/cfn-model/parser/cfn_parser.rb
Overview
This class is the heart of the matter. It will take a CloudFormation template and return a CfnModel object to represent the underlying document in a way that is hopefully more convenient for (cfn-nag rule) developers to work with
Instance Method Summary collapse
-
#parse(cloudformation_yml, parameter_values_json = nil, with_line_numbers = false, condition_values_json = nil) ⇒ Object
Given raw json/yml CloudFormation template, returns a CfnModel object or raise ParserErrors if something is amiss with the format.
- #parse_with_line_numbers(cloudformation_yml) ⇒ Object
- #parse_without_parameters(cloudformation_yml, with_line_numbers = false, condition_values_json = nil) ⇒ Object
Instance Method Details
#parse(cloudformation_yml, parameter_values_json = nil, with_line_numbers = false, condition_values_json = nil) ⇒ Object
Given raw json/yml CloudFormation template, returns a CfnModel object or raise ParserErrors if something is amiss with the format
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# File 'lib/cfn-model/parser/cfn_parser.rb', line 42 def parse(cloudformation_yml, parameter_values_json=nil, with_line_numbers=false, condition_values_json=nil) cfn_model = parse_without_parameters(cloudformation_yml, with_line_numbers, condition_values_json) apply_parameter_values(cfn_model, parameter_values_json) # pass 2: tie together separate resources only where necessary to make life easier for rule logic post_process_resource_model_elements cfn_model cfn_model end |
#parse_with_line_numbers(cloudformation_yml) ⇒ Object
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# File 'lib/cfn-model/parser/cfn_parser.rb', line 53 def parse_with_line_numbers(cloudformation_yml) handler = LineNumberHandler.new parser = Psych::Parser.new(handler) handler.parser = parser parser.parse(cloudformation_yml) ToRubyWithLineNumbers.create.accept(handler.root).first end |
#parse_without_parameters(cloudformation_yml, with_line_numbers = false, condition_values_json = nil) ⇒ Object
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# File 'lib/cfn-model/parser/cfn_parser.rb', line 61 def parse_without_parameters(cloudformation_yml, with_line_numbers=false, condition_values_json=nil) pre_validate_model cloudformation_yml cfn_hash = if with_line_numbers parse_with_line_numbers(cloudformation_yml) else YAML.safe_load cloudformation_yml, permitted_classes: [Date, Symbol] end # Transform raw resources in template as performed by # transforms CfnModel::TransformRegistry.instance.perform_transforms cfn_hash validate_references cfn_hash cfn_model = CfnModel.new cfn_model.raw_model = cfn_hash process_conditions cfn_hash, cfn_model, condition_values_json process_mappings cfn_hash, cfn_model # pass 1: wire properties into ModelElement objects if with_line_numbers transform_hash_into_model_elements_with_numbers cfn_hash, cfn_model else transform_hash_into_model_elements cfn_hash, cfn_model end transform_hash_into_parameters cfn_hash, cfn_model transform_hash_into_globals cfn_hash, cfn_model cfn_model end |