lib/kitchen/terraform/system_attrs_outputs_resolver.rb
# frozen_string_literal: true
# Copyright 2016-2021 Copado NCS LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
require "kitchen"
module Kitchen
module Terraform
# SystemAttrsOutputsResolver is the class of objects which resolve for systems the attrs which are derived from
# Terraform outputs.
class SystemAttrsOutputsResolver
# #initialize prepares a new instance of the class.
#
# @param attrs [Hash] a container for attributes.
# @return [Kitchen::Terraform::SystemAttrsOutputsResolver]
def initialize(attrs:)
self.attrs = attrs
end
# #resolve fetches Terraform outputs and associates them with InSpec attributes.
#
# @param attrs_outputs [Hash{String=>String}] a mapping of InSpec attribute names to Terraform output names.
# @param outputs [Hash{String=>Hash}] Terraform outputs.
# @raise [Kitchen::ClientError] if the resolution fails.
# @return [self]
def resolve(attrs_outputs:, outputs:)
resolve_defaults outputs: outputs
resolve_configuration attrs_outputs: attrs_outputs
self
end
private
attr_accessor :attrs
def resolve_configuration(attrs_outputs:)
attrs_outputs.each_pair do |attr_name, output_name|
begin
attrs.store attr_name.to_s, attrs.fetch("output_#{output_name}")
rescue ::KeyError
raise(
::Kitchen::ClientError,
"Resolving the system attributes from outputs failed due to the absence of the '#{output_name}' key " \
"from the Terraform outputs in the Kitchen instance state. This error indicates that the available " \
"Terraform outputs need to be updated with `kitchen converge` or that the wrong key was provided."
)
end
end
end
def resolve_defaults(outputs:)
outputs.each_pair do |output_name, output_body|
begin
attrs.store output_name.to_s, attrs.store("output_#{output_name}", output_body.fetch(:value))
rescue ::KeyError
raise(
::Kitchen::ClientError,
"Resolving the system attributes from outputs failed due to the absence of the 'value' key from the " \
"'#{output_name}' Terraform output in the Kitchen instance state. This error indicates that the output " \
"format of `terraform output -json` is unexpected."
)
end
end
end
end
end
end