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terraform.rb
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terraform.rb
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# frozen_string_literal: true
# Copyright 2016 New Context Services, Inc.
#
# 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'
require 'terraform/apply_command'
require 'terraform/configurable'
require 'terraform/get_command'
require 'terraform/group'
require 'terraform/output_command'
require 'terraform/plan_command'
require 'terraform/validate_command'
require 'terraform/version'
require 'terraform/version_command'
module Kitchen
module Provisioner
# Terraform configuration applier
class Terraform < Base
SUPPORTED_VERSION = /v0.6/
include ::Terraform::Configurable
kitchen_provisioner_api_version 2
plugin_version ::Terraform::VERSION
required_config :apply_timeout do |_, value, provisioner|
provisioner.coerce_apply_timeout value: value
end
default_config :apply_timeout, 600
default_config :color, true
required_config :color do |_, value, provisioner|
provisioner.coerce_color value: value
end
default_config(:directory) { |provisioner| provisioner[:kitchen_root] }
expand_path_for :directory
default_config :plan do |provisioner|
provisioner.instance_pathname filename: 'terraform.tfplan'
end
expand_path_for :plan
default_config :state do |provisioner|
provisioner.instance_pathname filename: 'terraform.tfstate'
end
expand_path_for :state
required_config :variable_files do |_, value, provisioner|
provisioner.coerce_variable_files value: value
end
default_config :variable_files, []
expand_path_for :variable_files
required_config :variables do |_, value, provisioner|
provisioner.coerce_variables value: value
end
default_config :variables, {}
def apply_execution_plan
::Terraform::ApplyCommand.execute \
logger: logger, state: config[:state], target: config[:plan],
color: config[:color], timeout: config[:apply_timeout]
end
def call(_state = nil)
validate_configuration_files
download_modules
plan_constructive_execution
apply_execution_plan
end
def coerce_apply_timeout(value:)
config[:apply_timeout] = Integer value
rescue ArgumentError, TypeError
config_error attribute: 'apply_timeout', expected: 'an integer'
end
def coerce_color(value:)
raise TypeError unless [TrueClass, FalseClass].include?(value.class)
config[:color] = value
rescue TypeError
config_error attribute: 'color', expected: 'a boolean'
end
def coerce_variable_files(value:)
config[:variable_files] = Array value
end
def coerce_variables(value:)
config[:variables] =
if value.is_a?(Array) || value.is_a?(String)
deprecated_variables_format value: value
else
Hash value
end
rescue ArgumentError, TypeError
config_error attribute: 'variables',
expected: 'a mapping of Terraform variable assignments'
end
def download_modules
::Terraform::GetCommand.execute logger: logger,
target: config[:directory]
end
def each_list_output(name:, &block)
output(name: name).split(',').each(&block)
end
def instance_pathname(filename:)
File.join config[:kitchen_root], '.kitchen', 'kitchen-terraform',
instance.name, filename
end
def output(name:)
::Terraform::OutputCommand
.execute logger: logger, state: config[:state], target: name, &:chomp
end
def plan_constructive_execution
::Terraform::PlanCommand
.execute destroy: false, logger: logger, out: config[:plan],
state: config[:state], target: config[:directory],
variables: config[:variables], color: config[:color],
variable_files: config[:variable_files]
end
def plan_destructive_execution
::Terraform::PlanCommand
.execute destroy: true, logger: logger, out: config[:plan],
state: config[:state], target: config[:directory],
variables: config[:variables], color: config[:color],
variable_files: config[:variable_files]
end
def validate_configuration_files
::Terraform::ValidateCommand.execute logger: logger,
target: config[:directory]
end
def validate_version
::Terraform::VersionCommand.execute logger: logger do |output|
raise UserError,
"Terraform version must match #{SUPPORTED_VERSION}" unless
SUPPORTED_VERSION.match output
end
end
private
def deprecated_variables_format(value:)
config_deprecated attribute: 'variables',
expected: 'a mapping rather than a list or string'
Hash[Array(value).map { |string| string.split '=' }]
end
end
end
end