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Diffstat (limited to 'lib/chef/provider/template.rb')
| -rw-r--r-- | lib/chef/provider/template.rb | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/lib/chef/provider/template.rb b/lib/chef/provider/template.rb new file mode 100644 index 0000000000..c937b9d980 --- /dev/null +++ b/lib/chef/provider/template.rb @@ -0,0 +1,117 @@ +#-- +# 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/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::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_location + @template_file_cache_location ||= begin + if @new_resource.local + @new_resource.source + else + cookbook = run_context.cookbook_collection[resource_cookbook] + cookbook.preferred_filename_on_disk_location(node, :templates, @new_resource.source) + end + 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 + render_template(IO.read(template_location), context, &block) + end + + end + end +end |