Module: Inspec::ResourceDSL

Included in:
Plugins::Resource
Defined in:
lib/inspec/plugin/v1/plugin_types/resource.rb

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method_name, *arguments, &block) ⇒ Object

Support for Resource DSL plugins. This is called when an unknown method is encountered within a resource class definition. Even tho this is defined as an instance method, it gets added to Inspec::Plugins::Resource via ‘extend`, so this is actually a class defintion.



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# File 'lib/inspec/plugin/v1/plugin_types/resource.rb', line 47

def method_missing(method_name, *arguments, &block)
  require 'inspec/plugin/v2'
  # Check to see if there is a resource_dsl plugin activator hook with the method name
  registry = Inspec::Plugin::V2::Registry.instance
  hook = registry.find_activators(plugin_type: :resource_dsl, activator_name: method_name).first
  if hook
    # OK, load the hook if it hasn't been already.  We'll then know a module,
    # which we can then inject into the resource
    registry.activate(:resource_dsl, method_name) unless hook.activated?
    # Inject the module's methods into the resource as class methods.
    # implementation_class is the field name, but this is actually a module.
    extend(hook.implementation_class)
    # Now that the module is loaded, it defined one or more methods
    # (presumably the one we were looking for.)
    # We still haven't called it, so do so now.
    send(method_name, *arguments, &block)
  else
    # If we couldn't find a plugin to match, maybe something up above has it,
    # or maybe it is just a unknown method error.
    super
  end
end

Instance Method Details

#__register(name, obj) ⇒ Object

rubocop:disable Metrics/AbcSize, Metrics/MethodLength, Metrics/CyclomaticComplexity, Metrics/PerceivedComplexity



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# File 'lib/inspec/plugin/v1/plugin_types/resource.rb', line 74

def __register(name, obj) # rubocop:disable Metrics/AbcSize, Metrics/MethodLength, Metrics/CyclomaticComplexity, Metrics/PerceivedComplexity
  cl = Class.new(obj) do # rubocop:disable Metrics/BlockLength
    attr_reader :resource_exception_message

    def initialize(backend, name, *args)
      @resource_skipped = false
      @resource_failed = false
      @supports = Inspec::Resource.supports[name]

      # attach the backend to this instance
      @__backend_runner__ = backend
      @__resource_name__ = name

      # check resource supports
      supported = true
      supported = check_supports unless @supports.nil?
      test_backend = defined?(Train::Transports::Mock::Connection) && backend.backend.class == Train::Transports::Mock::Connection
      # do not return if we are supported, or for tests
      return unless supported || test_backend

      # call the resource initializer
      begin
        super(*args)
      rescue Inspec::Exceptions::ResourceSkipped => e
        skip_resource(e.message)
      rescue Inspec::Exceptions::ResourceFailed => e
        fail_resource(e.message)
      rescue NoMethodError => e
        # The new platform resources have methods generated on the fly
        # for inspec check to work we need to skip these train errors
        raise unless test_backend && e.receiver.class == Train::Transports::Mock::Connection
        skip_resource(e.message)
      end
    end

    def self.desc(description = nil)
      return @description if description.nil?
      @description = description
    end

    def self.example(example = nil)
      return @example if example.nil?
      @example = example
    end

    def check_supports
      status = inspec.platform.supported?(@supports)
      fail_msg = "Resource #{@__resource_name__.capitalize} is not supported on platform #{inspec.platform.name}/#{inspec.platform.release}."
      fail_resource(fail_msg) unless status
      status
    end

    def skip_resource(message)
      @resource_skipped = true
      @resource_exception_message = message
    end

    def resource_skipped?
      @resource_skipped
    end

    def fail_resource(message)
      @resource_failed = true
      @resource_exception_message = message
    end

    def resource_failed?
      @resource_failed
    end

    def inspec
      @__backend_runner__
    end
  end

  # rubocop:enable Lint/NestedMethodDefinition
  if __resource_registry.key?(name)
    Inspec::Log.warn("Overwriting resource #{name}. To reference a specific version of #{name} use the resource() method")
  end
  __resource_registry[name] = cl
end

#__resource_registry ⇒ Object 



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# File 'lib/inspec/plugin/v1/plugin_types/resource.rb', line 70

def __resource_registry
  Inspec::Resource.registry
end

#desc(description = nil) ⇒ Object 



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# File 'lib/inspec/plugin/v1/plugin_types/resource.rb', line 26

def desc(description = nil)
  return if description.nil?
  __resource_registry[@name].desc(description)
end

#example(example = nil) ⇒ Object 



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# File 'lib/inspec/plugin/v1/plugin_types/resource.rb', line 37

def example(example = nil)
  return if example.nil?
  __resource_registry[@name].example(example)
end

#name(name = nil) ⇒ Object 



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# File 'lib/inspec/plugin/v1/plugin_types/resource.rb', line 20

def name(name = nil)
  return if name.nil?
  @name = name
  __register(name, self)
end

#supports(criteria = nil) ⇒ Object 



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# File 'lib/inspec/plugin/v1/plugin_types/resource.rb', line 31

def supports(criteria = nil)
  return if criteria.nil?
  Inspec::Resource.supports[@name] ||= []
  Inspec::Resource.supports[@name].push(criteria)
end