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#--
# Author:: Adam Jacob (<adam@opscode.com>)
# Author:: Christopher Walters (<cw@opscode.com>)
# Copyright:: Copyright (c) 2008, 2009 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/mixin/convert_to_class_name'
require 'chef/exceptions'
require 'chef/resource_builder'
require 'chef/mixin/shell_out'
require 'chef/dsl/resources'
require 'chef/dsl/definitions'
class Chef
module DSL
# == Chef::DSL::Recipe
# Provides the primary recipe DSL functionality for defining Chef resource
# objects via method calls.
module Recipe
include Chef::Mixin::ShellOut
# method_missing must live for backcompat purposes until Chef 13.
def method_missing(method_symbol, *args, &block)
#
# If there is already DSL for this, someone must have called
# method_missing manually. Not a fan. Not. A. Fan.
#
if respond_to?(method_symbol)
Chef::Log.deprecation("Calling method_missing(#{method_symbol.inspect}) directly is deprecated in Chef 12 and will be removed in Chef 13.")
Chef::Log.deprecation("Use public_send() or send() instead.")
return send(method_symbol, *args, &block)
end
#
# If a definition exists, then Chef::DSL::Definitions.add_definition was
# never called. DEPRECATED.
#
if run_context.definitions.has_key?(method_symbol.to_sym)
Chef::Log.deprecation("Definition #{method_symbol} (#{run_context.definitions[method_symbol.to_sym]}) was added to the run_context without calling Chef::DSL::Definitions.add_definition(#{method_symbol.to_sym.inspect}). This will become required in Chef 13.")
Chef::DSL::Definitions.add_definition(method_symbol)
return send(method_symbol, *args, &block)
end
#
# See if the resource exists anyway. If the user had set
# Chef::Resource::Blah = <resource>, a deprecation warning will be
# emitted and the DSL method 'blah' will be added to the DSL.
#
resource_class = Chef::ResourceResolver.new(run_context ? run_context.node : nil, method_symbol).resolve
if resource_class
#
# If the DSL method was *not* added, this is the case where the
# matching class implements 'provides?' and matches resources that it
# never declared "provides" for (which means we would never have
# created DSL). Anything where we don't create DSL is deprecated.
#
if !respond_to?(method_symbol)
Chef::Log.deprecation("#{resource_class} is marked as providing DSL #{method_symbol}, but provides #{method_symbol.inspect} was never called!")
Chef::Log.deprecation("In Chef 13, this will break: you must call provides to mark the names you provide, even if you also override provides? yourself.")
Chef::DSL::Resources.add_resource_dsl(method_symbol)
end
return send(method_symbol, *args, &block)
end
begin
super
rescue NoMethodError
raise NoMethodError, "No resource or method named `#{method_symbol}' for #{describe_self_for_error}"
rescue NameError
raise NameError, "No resource, method, or local variable named `#{method_symbol}' for #{describe_self_for_error}"
end
end
include Chef::DSL::Resources
include Chef::DSL::Definitions
#
# Instantiates a resource (via #build_resource), then adds it to the
# resource collection. Note that resource classes are looked up directly,
# so this will create the resource you intended even if the method name
# corresponding to that resource has been overridden.
#
# @param type [Symbol] The type of resource (e.g. `:file` or `:package`)
# @param name [String] The name of the resource (e.g. '/x/y.txt' or 'apache2')
# @param created_at [String] The caller of the resource. Use `caller[0]`
# to get the caller of your function. Defaults to the caller of this
# function.
# @param resource_attrs_block A block that lets you set attributes of the
# resource (it is instance_eval'd on the resource instance).
#
# @return [Chef::Resource] The new resource.
#
# @example
# declare_resource(:file, '/x/y.txy', caller[0]) do
# action :delete
# end
# # Equivalent to
# file '/x/y.txt' do
# action :delete
# end
#
def declare_resource(type, name, created_at=nil, &resource_attrs_block)
created_at ||= caller[0]
resource = build_resource(type, name, created_at, &resource_attrs_block)
run_context.resource_collection.insert(resource, resource_type: type, instance_name: name)
resource
end
#
# Instantiate a resource of the given +type+ with the given +name+ and
# attributes as given in the +resource_attrs_block+.
#
# The resource is NOT added to the resource collection.
#
# @param type [Symbol] The type of resource (e.g. `:file` or `:package`)
# @param name [String] The name of the resource (e.g. '/x/y.txt' or 'apache2')
# @param created_at [String] The caller of the resource. Use `caller[0]`
# to get the caller of your function. Defaults to the caller of this
# function.
# @param resource_attrs_block A block that lets you set attributes of the
# resource (it is instance_eval'd on the resource instance).
#
# @return [Chef::Resource] The new resource.
#
# @example
# build_resource(:file, '/x/y.txy', caller[0]) do
# action :delete
# end
#
def build_resource(type, name, created_at=nil, &resource_attrs_block)
created_at ||= caller[0]
Chef::ResourceBuilder.new(
type: type,
name: name,
created_at: created_at,
params: @params,
run_context: run_context,
cookbook_name: cookbook_name,
recipe_name: recipe_name,
enclosing_provider: self.is_a?(Chef::Provider) ? self : nil
).build(&resource_attrs_block)
end
def resource_class_for(snake_case_name)
Chef::Resource.resource_for_node(snake_case_name, run_context.node)
end
def have_resource_class_for?(snake_case_name)
not resource_class_for(snake_case_name).nil?
rescue NameError
false
end
def describe_self_for_error
if respond_to?(:name)
%Q[`#{self.class.name} "#{name}"']
elsif respond_to?(:recipe_name)
%Q[`#{self.class.name} "#{recipe_name}"']
else
to_s
end
end
def exec(args)
raise Chef::Exceptions::ResourceNotFound, "exec was called, but you probably meant to use an execute resource. If not, please call Kernel#exec explicitly. The exec block called was \"#{args}\""
end
end
end
end
# We require this at the BOTTOM of this file to avoid circular requires (it is used
# at runtime but not load time)
require 'chef/resource'
# **DEPRECATED**
# This used to be part of chef/mixin/recipe_definition_dsl_core. Load the file to activate the deprecation code.
require 'chef/mixin/recipe_definition_dsl_core'
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