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#
# Author:: Lamont Granquist (<lamont@chef.io>)
# Copyright:: Copyright (c) 2015 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.
# NOTE: This class is not intended for internal use by the chef-client code. Classes in
# chef-client should still have objects like the node and run_context injected into them
# via their initializers. This class is still global state and will complicate writing
# unit tests for internal Chef objects. It is intended to be used only by recipe code.
# NOTE: When adding require lines here you are creating tight coupling on a global that may be
# included in many different situations and ultimately that ends in tears with circular requires.
# Note the way that the run_context, provider_priority_map and resource_priority_map are "dependency
# injected" into this class by other objects and do not reference the class symbols in those files
# directly and we do not need to require those files here.
require 'chef/platform/provider_priority_map'
require 'chef/platform/resource_priority_map'
require 'chef/platform/provider_handler_map'
require 'chef/platform/resource_handler_map'
class Chef
class << self
#
# Public API
#
#
# Get the node object
#
# @return [Chef::Node] node object of the chef-client run
#
attr_reader :node
#
# Get the run context
#
# @return [Chef::RunContext] run_context of the chef-client run
#
attr_reader :run_context
# Register an event handler with user specified block
#
# @return[Chef::EventDispatch::Base] handler object
def event_handler(&block)
dsl = Chef::EventDispatch::DSL.new('Chef client DSL')
dsl.instance_eval(&block)
end
# Get the array of providers associated with a resource_name for the current node
#
# @param resource_name [Symbol] name of the resource as a symbol
#
# @return [Array<Class>] Priority Array of Provider Classes to use for the resource_name on the node
#
def get_provider_priority_array(resource_name)
result = provider_priority_map.get_priority_array(node, resource_name.to_sym)
result = result.dup if result
result
end
#
# Get the array of resources associated with a resource_name for the current node
#
# @param resource_name [Symbol] name of the resource as a symbol
#
# @return [Array<Class>] Priority Array of Resource Classes to use for the resource_name on the node
#
def get_resource_priority_array(resource_name)
result = resource_priority_map.get_priority_array(node, resource_name.to_sym)
result = result.dup if result
result
end
#
# Set the array of providers associated with a resource_name for the current node
#
# @param resource_name [Symbol] name of the resource as a symbol
# @param priority_array [Class, Array<Class>] Class or Array of Classes to set as the priority for resource_name on the node
# @param filter [Hash] Chef::Nodearray-style filter
#
# @return [Array<Class>] Modified Priority Array of Provider Classes to use for the resource_name on the node
#
def set_provider_priority_array(resource_name, priority_array, *filter, &block)
result = provider_priority_map.set_priority_array(resource_name.to_sym, priority_array, *filter, &block)
result = result.dup if result
result
end
#
# Get the array of resources associated with a resource_name for the current node
#
# @param resource_name [Symbol] name of the resource as a symbol
# @param priority_array [Class, Array<Class>] Class or Array of Classes to set as the priority for resource_name on the node
# @param filter [Hash] Chef::Nodearray-style filter
#
# @return [Array<Class>] Modified Priority Array of Resource Classes to use for the resource_name on the node
#
def set_resource_priority_array(resource_name, priority_array, *filter, &block)
result = resource_priority_map.set_priority_array(resource_name.to_sym, priority_array, *filter, &block)
result = result.dup if result
result
end
#
# Dependency Injection API (Private not Public)
# [ in the ruby sense these have to be public methods, but they are
# *NOT* for public consumption ]
#
#
# Sets the resource_priority_map
#
# @param resource_priority_map [Chef::Platform::ResourcePriorityMap]
#
# @api private
def set_resource_priority_map(resource_priority_map)
@resource_priority_map = resource_priority_map
end
#
# Sets the provider_priority_map
#
# @param provider_priority_map [Chef::Platform::providerPriorityMap]
#
# @api private
def set_provider_priority_map(provider_priority_map)
@provider_priority_map = provider_priority_map
end
#
# Sets the node object
#
# @api private
# @param node [Chef::Node]
def set_node(node)
@node = node
end
#
# Sets the run_context object
#
# @param run_context [Chef::RunContext]
#
# @api private
def set_run_context(run_context)
@run_context = run_context
end
#
# Resets the internal state
#
# @api private
def reset!
@run_context = nil
@node = nil
@provider_priority_map = nil
@resource_priority_map = nil
@provider_handler_map = nil
@resource_handler_map = nil
end
# @api private
def provider_priority_map
# these slurp in the resource+provider world, so be exceedingly lazy about requiring them
@provider_priority_map ||= Chef::Platform::ProviderPriorityMap.instance
end
# @api private
def resource_priority_map
@resource_priority_map ||= Chef::Platform::ResourcePriorityMap.instance
end
# @api private
def provider_handler_map
@provider_handler_map ||= Chef::Platform::ProviderHandlerMap.instance
end
# @api private
def resource_handler_map
@resource_handler_map ||= Chef::Platform::ResourceHandlerMap.instance
end
#
# @overload log
# Get the current log object.
#
# @return An object that supports `deprecation(message)`
#
# @example
# run_context.log.deprecation("Deprecated!")
#
# @api private
def log
# `run_context.events` is the primary deprecation target if we're in a run. If we
# are not yet in a run, print to `Chef::Log`.
(run_context && run_context.events) || Chef::Log
end
end
reset!
end
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