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#
# Author:: Adam Jacob (<adam@chef.io>)
# Author:: Christopher Walters (<cw@chef.io>)
# Author:: Daniel DeLeo (<dan@chef.io>)
# Copyright:: Copyright 2008-2016, Chef Software 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/provider"
require "chef/dsl/recipe"
require "chef/dsl/include_recipe"
class Chef
class Provider
# == Chef::Provider::LWRPBase
# Base class from which LWRP providers inherit.
class LWRPBase < Provider
include Chef::DSL::Recipe
# These were previously provided by Chef::Mixin::RecipeDefinitionDSLCore.
# They are not included by its replacement, Chef::DSL::Recipe, but
# they may be used in existing LWRPs.
include Chef::DSL::PlatformIntrospection
include Chef::DSL::DataQuery
# Allow include_recipe from within LWRP provider code
include Chef::DSL::IncludeRecipe
# no-op `load_current_resource`. Allows simple LWRP providers to work
# without defining this method explicitly (silences
# Chef::Exceptions::Override exception)
def load_current_resource
end
# class methods
class <<self
include Chef::Mixin::ConvertToClassName
include Chef::Mixin::FromFile
def build_from_file(cookbook_name, filename, run_context)
if LWRPBase.loaded_lwrps[filename]
Chef::Log.debug("LWRP provider #{filename} from cookbook #{cookbook_name} has already been loaded! Skipping the reload.")
return loaded_lwrps[filename]
end
resource_name = filename_to_qualified_string(cookbook_name, filename)
# We load the class first to give it a chance to set its own name
provider_class = Class.new(self)
provider_class.provides resource_name.to_sym
provider_class.class_from_file(filename)
# Respect resource_name set inside the LWRP
provider_class.instance_eval do
define_singleton_method(:to_s) do
"LWRP provider #{resource_name} from cookbook #{cookbook_name}"
end
define_singleton_method(:inspect) { to_s }
end
Chef::Log.debug("Loaded contents of #{filename} into provider #{resource_name} (#{provider_class})")
LWRPBase.loaded_lwrps[filename] = true
Chef::Provider.register_deprecated_lwrp_class(provider_class, convert_to_class_name(resource_name))
provider_class
end
# DSL for defining a provider's actions.
def action(name, &block)
define_method("action_#{name}") do
instance_eval(&block)
end
end
protected
def loaded_lwrps
@loaded_lwrps ||= {}
end
end
end
end
end
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