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#
# Author:: Adam Edwards (<adamed@chef.io>)
#
# Copyright:: Copyright 2014-2016, 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"
class Chef::Util::DSC
class ConfigurationGenerator
def initialize(node, config_directory)
@node = node
@config_directory = config_directory
end
def configuration_document_from_script_code(code, configuration_flags, imports, shellout_flags)
Chef::Log.debug("DSC: DSC code:\n '#{code}'")
generated_script_path = write_document_generation_script(code, "chef_dsc", imports)
begin
configuration_document_from_script_path(generated_script_path, "chef_dsc", configuration_flags, shellout_flags)
ensure
::FileUtils.rm(generated_script_path)
end
end
def configuration_document_from_script_path(script_path, configuration_name, configuration_flags, shellout_flags)
validate_configuration_name!(configuration_name)
document_generation_cmdlet = Chef::Util::Powershell::Cmdlet.new(
@node,
configuration_document_generation_code(script_path, configuration_name))
merged_configuration_flags = get_merged_configuration_flags!(configuration_flags, configuration_name)
document_generation_cmdlet.run!(merged_configuration_flags, shellout_flags)
configuration_document_location = find_configuration_document(configuration_name)
if ! configuration_document_location
raise RuntimeError, "No DSC configuration for '#{configuration_name}' was generated from supplied DSC script"
end
configuration_document = get_configuration_document(configuration_document_location)
::FileUtils.rm_rf(configuration_document_location)
configuration_document
end
protected
# From PowerShell error help for the Configuration language element:
# Standard names may only contain letters (a-z, A-Z), numbers (0-9), and underscore (_).
# The name may not be null or empty, and should start with a letter.
def validate_configuration_name!(configuration_name)
if !!(configuration_name =~ /\A[A-Za-z]+[_a-zA-Z0-9]*\Z/) == false
raise ArgumentError, 'Configuration `#{configuration_name}` is not a valid PowerShell cmdlet name'
end
end
def get_merged_configuration_flags!(configuration_flags, configuration_name)
merged_configuration_flags = { :outputpath => configuration_document_directory(configuration_name) }
if configuration_flags
configuration_flags.map do |switch, value|
if merged_configuration_flags.key?(switch.to_s.downcase.to_sym)
raise ArgumentError, "The `flags` attribute for the dsc_script resource contained a command line switch :#{switch} that is disallowed."
end
merged_configuration_flags[switch.to_s.downcase.to_sym] = value
end
end
merged_configuration_flags
end
def configuration_code(code, configuration_name, imports)
<<-EOF
$ProgressPreference = 'SilentlyContinue';
Configuration '#{configuration_name}'
{
#{generate_import_resource_statements(imports).join(" \n")}
node 'localhost'
{
#{code}
}
}
EOF
end
def generate_import_resource_statements(imports)
if imports
imports.map do |resource_module, resources|
if resources.length == 0 || resources.include?("*")
"Import-DscResource -ModuleName #{resource_module}"
else
"Import-DscResource -ModuleName #{resource_module} -Name #{resources.join(',')}"
end
end
else
[]
end
end
def configuration_document_generation_code(configuration_script, configuration_name)
". '#{configuration_script}';#{configuration_name}"
end
def write_document_generation_script(code, configuration_name, imports)
script_path = "#{@config_directory}/chef_dsc_config.ps1"
::File.open(script_path, "wt") do |script|
script.write(configuration_code(code, configuration_name, imports))
end
script_path
end
def find_configuration_document(configuration_name)
document_directory = configuration_document_directory(configuration_name)
document_file_name = ::Dir.entries(document_directory).find { |path| path =~ /.*.mof/ }
::File.join(document_directory, document_file_name) if document_file_name
end
def configuration_document_directory(configuration_name)
::File.join(@config_directory, configuration_name)
end
def get_configuration_document(document_path)
::File.open(document_path, "rb") do |file|
file.read
end
end
end
end
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