a32f34b408
Knife-Zero doesn't include Berkshelf support, so vendoring everything in the repo is convenient again
128 lines
3.7 KiB
Ruby
128 lines
3.7 KiB
Ruby
#
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# Copyright 2013-2016, Noah Kantrowitz
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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require 'chef/provider'
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module Poise
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module Helpers
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# Resource mixin to create "fused" resources where the resource and provider
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# are implemented in the same class.
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#
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# @since 2.0.0
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# @example
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# class Chef::Resource::MyResource < Chef::Resource
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# include Poise(fused: true)
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# attribute(:path, kind_of: String)
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# attribute(:message, kind_of: String)
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# action(:run) do
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# file new_resource.path do
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# content new_resource.message
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# end
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# end
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# end
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module Fused
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# Hack is_a? so that the DSL will consider this a Provider for the
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# purposes of attaching enclosing_provider.
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#
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# @api private
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# @param klass [Class]
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# @return [Boolean]
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def is_a?(klass)
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if klass == Chef::Provider
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# Lies, damn lies, and Ruby code.
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true
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else
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super
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end
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end
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# Hack provider_for_action so that the resource is also the provider.
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#
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# @api private
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# @param action [Symbol]
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# @return [Chef::Provider]
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def provider_for_action(action)
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provider(self.class.fused_provider_class) unless provider
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super
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end
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# @!classmethods
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module ClassMethods
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# Define a provider action. The block should contain the usual provider
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# code.
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#
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# @param name [Symbol] Name of the action.
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# @param block [Proc] Action implementation.
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# @example
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# action(:run) do
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# file '/temp' do
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# user 'root'
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# content 'temp'
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# end
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# end
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def action(name, &block)
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fused_actions[name.to_sym] = block
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# Make sure this action is allowed, also sets the default if first.
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if respond_to?(:actions)
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actions(name.to_sym)
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end
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end
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# Storage accessor for fused action blocks. Maps action name to proc.
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#
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# @api private
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# @return [Hash<Symbol, Proc>]
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def fused_actions
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(@fused_actions ||= {})
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end
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# Create a provider class for the fused actions in this resource.
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# Inherits from the fused provider class of the resource's superclass if
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# present.
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#
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# @api private
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# @return [Class]
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def fused_provider_class
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@fused_provider_class ||= begin
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provider_superclass = begin
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self.superclass.fused_provider_class
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rescue NoMethodError
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Chef::Provider
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end
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actions = fused_actions
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class_name = self.name
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Class.new(provider_superclass) do
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include Poise
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define_singleton_method(:name) { class_name + ' (fused)' }
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actions.each do |action, block|
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define_method(:"action_#{action}", &block)
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end
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end
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end
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end
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def included(klass)
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super
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klass.extend(ClassMethods)
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end
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end
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extend ClassMethods
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end
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end
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end
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