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#--
# Author:: Adam Jacob (<adam@opscode.com>)
# Author:: Daniel DeLeo (<dan@opscode.com>)
# Copyright:: Copyright (c) 2008, 2010 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/provider/template_finder'
require 'chef/provider/file'
require 'chef/mixin/template'
require 'chef/mixin/checksum'
require 'chef/file_access_control'
class Chef
class Provider
class Template < Chef::Provider::File
include Chef::Mixin::EnforceOwnershipAndPermissions
include Chef::Mixin::Checksum
include Chef::Mixin::Template
def load_current_resource
@current_resource = Chef::Resource::Template.new(@new_resource.name)
super
end
def define_resource_requirements
super
requirements.assert(:create, :create_if_missing) do |a|
a.assertion { ::File::exist?(template_location) }
a.failure_message "Template source #{template_location} could not be found."
a.whyrun "Template source #{template_location} does not exist. Assuming it would have been created."
a.block_action!
end
end
def action_create
render_with_context(template_location) do |rendered_template|
rendered(rendered_template)
update = ::File.exist?(@new_resource.path)
if update && content_matches?
Chef::Log.debug("#{@new_resource} content has not changed.")
set_all_access_controls
else
description = []
action_message = update ? "update #{@current_resource} from #{short_cksum(@current_resource.checksum)} to #{short_cksum(@new_resource.checksum)}" :
"create #{@new_resource}"
description << action_message
description << diff_current(rendered_template.path)
converge_by(description) do
backup
FileUtils.mv(rendered_template.path, @new_resource.path)
Chef::Log.info("#{@new_resource} updated content")
access_controls.set_all!
stat = ::File.stat(@new_resource.path)
# template depends on the checksum not changing, and updates it
# itself later in the code, so we cannot set it here, as we do with
# all other < File child provider classes
@new_resource.owner(stat.uid)
@new_resource.mode(stat.mode & 07777)
@new_resource.group(stat.gid)
end
end
end
end
def template_finder
@template_finder ||= begin
TemplateFinder.new(run_context, cookbook_name, node)
end
end
def template_location
@template_file_cache_location ||= begin
template_finder.find(@new_resource.source, :local => @new_resource.local, :cookbook => @new_resource.cookbook)
end
end
def resource_cookbook
@new_resource.cookbook || @new_resource.cookbook_name
end
def rendered(rendered_template)
@new_resource.checksum(checksum(rendered_template.path))
Chef::Log.debug("Current content's checksum: #{@current_resource.checksum}")
Chef::Log.debug("Rendered content's checksum: #{@new_resource.checksum}")
end
def content_matches?
@current_resource.checksum == @new_resource.checksum
end
private
def render_with_context(template_location, &block)
context = {}
context.merge!(@new_resource.variables)
context[:node] = node
context[:template_finder] = template_finder
render_template(IO.read(template_location), context, &block)
end
end
end
end
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