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#
# Author:: Adam Edwards (<adamed@chef.io>)
#
# Copyright:: Copyright 2014-2017, Chef Software 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 "chef/util/powershell/cmdlet"
require "chef/util/dsc/configuration_generator"
require "chef/util/dsc/local_configuration_manager"
require "chef/util/path_helper"
class Chef
class Provider
class DscScript < Chef::Provider
provides :dsc_script
def initialize(dsc_resource, run_context)
super(dsc_resource, run_context)
@dsc_resource = dsc_resource
@resource_converged = false
@operations = {
:set => Proc.new do |config_manager, document, shellout_flags|
config_manager.set_configuration(document, shellout_flags)
end,
:test => Proc.new do |config_manager, document, shellout_flags|
config_manager.test_configuration(document, shellout_flags)
end }
end
def action_run
if ! @resource_converged
converge_by(generate_description) do
run_configuration(:set)
logger.info("DSC resource configuration completed successfully")
end
end
end
def load_current_resource
if supports_dsc?
@dsc_resources_info = run_configuration(:test)
@resource_converged = @dsc_resources_info.all? do |resource|
!resource.changes_state?
end
end
end
def define_resource_requirements
requirements.assert(:run) do |a|
err = [
"Could not find PowerShell DSC support on the system",
powershell_info_str,
"Powershell 4.0 or higher was not detected on your system and is required to use the dsc_script resource.",
]
a.assertion { supports_dsc? }
a.failure_message Chef::Exceptions::ProviderNotFound, err.join(" ")
a.whyrun err + ["Assuming a previous resource installs Powershell 4.0 or higher."]
a.block_action!
end
end
protected
def supports_dsc?
run_context && Chef::Platform.supports_dsc?(node)
end
def run_configuration(operation)
config_directory = ::Dir.mktmpdir("chef-dsc-script")
configuration_data_path = get_configuration_data_path(config_directory)
configuration_flags = get_augmented_configuration_flags(configuration_data_path)
config_manager = Chef::Util::DSC::LocalConfigurationManager.new(@run_context.node, config_directory)
shellout_flags = {
:cwd => @dsc_resource.cwd,
:environment => @dsc_resource.environment,
:timeout => @dsc_resource.timeout,
}
begin
configuration_document = generate_configuration_document(config_directory, configuration_flags)
@operations[operation].call(config_manager, configuration_document, shellout_flags)
rescue Exception => e
logger.error("DSC operation failed: #{e.message}")
raise e
ensure
::FileUtils.rm_rf(config_directory)
end
end
def get_augmented_configuration_flags(configuration_data_path)
updated_flags = @dsc_resource.flags.nil? ? {} : @dsc_resource.flags.dup
if configuration_data_path
Chef::Util::PathHelper.validate_path(configuration_data_path)
updated_flags[:configurationdata] = configuration_data_path
end
updated_flags
end
def generate_configuration_document(config_directory, configuration_flags)
shellout_flags = {
:cwd => @dsc_resource.cwd,
:environment => @dsc_resource.environment,
:timeout => @dsc_resource.timeout,
}
generator = Chef::Util::DSC::ConfigurationGenerator.new(@run_context.node, config_directory)
if @dsc_resource.command
generator.configuration_document_from_script_path(@dsc_resource.command, configuration_name, configuration_flags, shellout_flags)
else
# If code is also not provided, we mimic what the other script resources do (execute nothing)
logger.warn("Neither code or command were provided for dsc_resource[#{@dsc_resource.name}].") unless @dsc_resource.code
generator.configuration_document_from_script_code(@dsc_resource.code || "", configuration_flags, @dsc_resource.imports, shellout_flags)
end
end
def get_configuration_data_path(config_directory)
if @dsc_resource.configuration_data_script
@dsc_resource.configuration_data_script
elsif @dsc_resource.configuration_data
configuration_data_path = "#{config_directory}/chef_dsc_config_data.psd1"
::File.open(configuration_data_path, "wt") do |script|
script.write(@dsc_resource.configuration_data)
end
configuration_data_path
end
end
def configuration_name
@dsc_resource.configuration_name || @dsc_resource.name
end
def configuration_friendly_name
if @dsc_resource.code
@dsc_resource.name
else
configuration_name
end
end
private
def generate_description
["converge DSC configuration '#{configuration_friendly_name}'"] +
@dsc_resources_info.map do |resource|
if resource.changes_state?
# We ignore the last log message because it only contains the time it took, which looks weird
cleaned_messages = resource.change_log[0..-2].map { |c| c.sub(/^#{Regexp.escape(resource.name)}/, "").strip }
unless cleaned_messages.empty?
"converge DSC resource #{resource.name} by #{cleaned_messages.find_all { |c| c != '' }.join("\n")}"
else
"converge DSC resource #{resource.name}"
end
else
# This is needed because a dsc script can have resources that are both converged and not
"converge DSC resource #{resource.name} by doing nothing because it is already converged"
end
end
end
def powershell_info_str
if run_context && run_context.node[:languages] && run_context.node[:languages][:powershell]
install_info = "Powershell #{run_context.node[:languages][:powershell][:version]} was found on the system."
else
install_info = "Powershell was not found."
end
end
end
end
end
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