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#
# Author:: Adam Edwards (<adamed@getchef.com>)
# Copyright:: Copyright (c) 2014 Opscode, Inc.
# License:: Apache License, Version 2.0
#
# 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/guard_interpreter/default_guard_interpreter'
class Chef
class GuardInterpreter
class ResourceGuardInterpreter < DefaultGuardInterpreter
def translate_command_block(command, opts, &block)
merge_inherited_attributes
if command && ! block_given?
block_attributes = opts.merge({:code => command})
# Handles cases like powershell_script where default
# attributes are different when used in a guard vs. not. For
# powershell_script in particular, this will go away when
# the one attribue that causes this changes its default to be
# the same after some period to prepare for deprecation
if @resource.class.respond_to?(:get_default_attributes)
block_attributes = @resource.class.send(:get_default_attributes, opts).merge(block_attributes)
end
translated_block = to_block(block_attributes)
[nil, translated_block]
else
super
end
end
def initialize(resource_symbol, parent_resource)
@parent_resource = parent_resource
resource_class = get_resource_class(parent_resource, resource_symbol)
raise ArgumentError, "Specified guard_interpreter resource #{resource_symbol.to_s} unknown for this platform" if resource_class.nil?
empty_events = Chef::EventDispatch::Dispatcher.new
anonymous_run_context = Chef::RunContext.new(parent_resource.node, {}, empty_events)
@resource = resource_class.new('Guard resource', anonymous_run_context)
if ! @resource.kind_of?(Chef::Resource::Script)
raise ArgumentError, "Specified guard interpreter class #{resource_class} must be a kind of Chef::Resource::Script resource"
end
end
protected
def evaluate_action(action=nil, &block)
@resource.instance_eval(&block)
run_action = action || @resource.action
begin
@resource.run_action(run_action)
resource_updated = @resource.updated
rescue Mixlib::ShellOut::ShellCommandFailed
resource_updated = nil
end
resource_updated
end
def to_block(attributes, action=nil)
resource_block = block_from_attributes(attributes)
Proc.new do
evaluate_action(action, &resource_block)
end
end
def get_resource_class(parent_resource, resource_symbol)
if parent_resource.nil? || parent_resource.node.nil?
raise ArgumentError, "Node for guard resource parent must not be nil"
end
Chef::Resource.resource_for_node(resource_symbol, parent_resource.node)
end
def block_from_attributes(attributes)
Proc.new do
attributes.keys.each do |attribute_name|
send(attribute_name, attributes[attribute_name]) if respond_to?(attribute_name)
end
end
end
def merge_inherited_attributes
inherited_attributes = []
if @parent_resource.class.respond_to?(:guard_inherited_attributes)
inherited_attributes = @parent_resource.class.send(:guard_inherited_attributes)
end
if inherited_attributes && !inherited_attributes.empty?
inherited_attributes.each do |attribute|
if @parent_resource.respond_to?(attribute) && @resource.respond_to?(attribute)
parent_value = @parent_resource.send(attribute)
child_value = @resource.send(attribute)
if parent_value || child_value
@resource.send(attribute, parent_value)
end
end
end
end
end
end
end
end
|
