namespace :docs_site do desc "Generate resource documentation .rst pages in a docs_site directory" task :resources do Encoding.default_external = Encoding::UTF_8 $:.unshift(File.expand_path(File.join(File.dirname(__FILE__), "lib"))) require "chef/resource_inspector" require "erb" require "fileutils" # @param version String # @return String Chef Infra Client or Chef Client depending on version def branded_chef_client_name(version) return "Chef Infra Client" if Gem::Version.new(version) >= Gem::Version.new("15") "Chef Client" end # @return [String, nil] a pretty defaul value string or nil if we want to skip it def pretty_default(default) return nil if default.nil? || default == "" || default == "lazy default" if default.is_a?(String) # .inspect wraps the value in quotes which we want for strings, but not sentences or symbols as strings return default.inspect unless default[0] == ":" || default.end_with?(".") end default end # generate the top example resource block example text # @param properties Array # @return String def generate_resource_block(resource_name, properties) padding_size = largest_property_name(properties) + 6 # build the resource string with property spacing between property names and comments text = " #{resource_name} 'name' do\n" properties.each do |p| text << " #{p["name"].ljust(padding_size)}" text << friendly_types_list(p["is"]) text << " # default value: 'name' unless specified" if p["name_property"] text << " # default value: #{pretty_default(p["default"])}" unless pretty_default(p["default"]).nil? text << "\n" end text << " #{"action".ljust(padding_size)}Symbol # defaults to :#{@default_action.first} if not specified\n" text << " end" text end # we need to know how much space to leave so columns line up # @return String def largest_property_name(properties) if properties.empty? 6 # we'll include "action" even without properties and it's 6 chars long else properties.max_by { |x| x["name"].size }["name"].size end end # given an array of properties print out a single comma separated string # handling commas / and properly and plural vs. singular wording depending # on the number of properties # @return String def friendly_properly_list(arr) return nil if arr.empty? # resources w/o properties props = arr.map { |x| "``#{x["name"]}``" } # build the text string containing all properties bolded w/ punctuation if props.size > 1 props[-1] = "and #{props[-1]}" end text = props.size == 2 ? props.join(" ") : props.join(", ") text << ( props.size > 1 ? " are the properties" : " is the property" ) text << " available to this resource." text end # given an array of types print out a single comma separated string # handling a nil value that needs to be printed as "nil" and TrueClass/FalseClass # which needs to be "true" and "false" # @return String def friendly_types_list(arr) fixed_arr = Array(arr).map do |x| case x when "TrueClass" "true" when "FalseClass" "false" else x end end fixed_arr.compact.join(", ") end # Makes sure the resource name is bolded within the description # @return String def bolded_description(name, description) return nil if description.nil? # handle resources missing descriptions # we only want to bold occurences of the resource name in the first 5 words so treat it as an array desc_array = description.split(" ") desc_array = desc_array[0..4].map! { |x| name == x ? "**#{x}**" : x } + desc_array[5..-1] # strip out notes and return just the description desc_array.join(" ").split("Note: ").first.strip end def note_text(description) return nil if description.nil? note = description.split("Note: ")[1] if note <<-HEREDOC .. note:: #{note} HEREDOC end end def boilerplate_content <<~HEREDOC Common Resource Functionality ===================================================== Chef resources include common properties, notifications, and resource guards. Common Properties ----------------------------------------------------- .. tag resources_common_properties The following properties are common to every resource: ``ignore_failure`` **Ruby Type:** true, false | **Default Value:** ``false`` Continue running a recipe if a resource fails for any reason. ``retries`` **Ruby Type:** Integer | **Default Value:** ``0`` The number of attempts to catch exceptions and retry the resource. ``retry_delay`` **Ruby Type:** Integer | **Default Value:** ``2`` The retry delay (in seconds). ``sensitive`` **Ruby Type:** true, false | **Default Value:** ``false`` Ensure that sensitive resource data is not logged by Chef Infra Client. .. end_tag Notifications ----------------------------------------------------- ``notifies`` **Ruby Type:** Symbol, 'Chef::Resource[String]' .. tag resources_common_notification_notifies A resource may notify another resource to take action when its state changes. Specify a ``'resource[name]'``, the ``:action`` that resource should take, and then the ``:timer`` for that action. A resource may notify more than one resource; use a ``notifies`` statement for each resource to be notified. .. end_tag .. tag resources_common_notification_timers A timer specifies the point during a Chef Infra Client run at which a notification is run. The following timers are available: ``:before`` Specifies that the action on a notified resource should be run before processing the resource block in which the notification is located. ``:delayed`` Default. Specifies that a notification should be queued up, and then executed at the end of a Chef Infra Client run. ``:immediate``, ``:immediately`` Specifies that a notification should be run immediately, per resource notified. .. end_tag .. tag resources_common_notification_notifies_syntax The syntax for ``notifies`` is: .. code-block:: ruby notifies :action, 'resource[name]', :timer .. end_tag ``subscribes`` **Ruby Type:** Symbol, 'Chef::Resource[String]' .. tag resources_common_notification_subscribes A resource may listen to another resource, and then take action if the state of the resource being listened to changes. Specify a ``'resource[name]'``, the ``:action`` to be taken, and then the ``:timer`` for that action. Note that ``subscribes`` does not apply the specified action to the resource that it listens to - for example: .. code-block:: ruby file '/etc/nginx/ssl/example.crt' do mode '0600' owner 'root' end service 'nginx' do subscribes :reload, 'file[/etc/nginx/ssl/example.crt]', :immediately end In this case the ``subscribes`` property reloads the ``nginx`` service whenever its certificate file, located under ``/etc/nginx/ssl/example.crt``, is updated. ``subscribes`` does not make any changes to the certificate file itself, it merely listens for a change to the file, and executes the ``:reload`` action for its resource (in this example ``nginx``) when a change is detected. .. end_tag .. tag resources_common_notification_timers A timer specifies the point during a Chef Infra Client run at which a notification is run. The following timers are available: ``:before`` Specifies that the action on a notified resource should be run before processing the resource block in which the notification is located. ``:delayed`` Default. Specifies that a notification should be queued up, and then executed at the end of a Chef Infra Client run. ``:immediate``, ``:immediately`` Specifies that a notification should be run immediately, per resource notified. .. end_tag .. tag resources_common_notification_subscribes_syntax The syntax for ``subscribes`` is: .. code-block:: ruby subscribes :action, 'resource[name]', :timer .. end_tag Guards ----------------------------------------------------- .. tag resources_common_guards A guard property can be used to evaluate the state of a node during the execution phase of a Chef Infra Client run. Based on the results of this evaluation, a guard property is then used to tell Chef Infra Client if it should continue executing a resource. A guard property accepts either a string value or a Ruby block value: * A string is executed as a shell command. If the command returns ``0``, the guard is applied. If the command returns any other value, then the guard property is not applied. String guards in a **powershell_script** run Windows PowerShell commands and may return ``true`` in addition to ``0``. * A block is executed as Ruby code that must return either ``true`` or ``false``. If the block returns ``true``, the guard property is applied. If the block returns ``false``, the guard property is not applied. A guard property is useful for ensuring that a resource is idempotent by allowing that resource to test for the desired state as it is being executed, and then if the desired state is present, for Chef Infra Client to do nothing. .. end_tag **Properties** .. tag resources_common_guards_properties The following properties can be used to define a guard that is evaluated during the execution phase of a Chef Infra Client run: ``not_if`` Prevent a resource from executing when the condition returns ``true``. ``only_if`` Allow a resource to execute only if the condition returns ``true``. .. end_tag HEREDOC end template = %{===================================================== <%= @name %> resource ===================================================== `[edit on GitHub] .rst>`__ <%= bolded_description(@name, @description) %> <%= note_text(@description) -%> <% unless @introduced.nil? -%> **New in <%= branded_chef_client_name(@introduced) %> <%= @introduced %>.** <% end -%> Syntax ===================================================== The <%= @name %> resource has the following syntax: .. code-block:: ruby <%= @resource_block %> where: * ``<%= @name %>`` is the resource. * ``name`` is the name given to the resource block. * ``action`` identifies which steps Chef Infra Client will take to bring the node into the desired state. <% unless @property_list.nil? %>* <%= @property_list %><% end %> Actions ===================================================== The <%= @name %> resource has the following actions: <% @actions.each do |a| %> ``:<%= a %>`` <% if a == @default_action %>Default. <% end %>Description here. <% end %> ``:nothing`` .. tag resources_common_actions_nothing This resource block does not act unless notified by another resource to take action. Once notified, this resource block either runs immediately or is queued up to run at the end of a Chef Infra Client run. .. end_tag Properties ===================================================== The <%= @name %> resource has the following properties: <% @properties.each do |p| %> ``<%= p['name'] %>`` **Ruby Type:** <%= friendly_types_list(p['is']) %><% unless pretty_default(p['default']).nil? %> | **Default Value:** ``<%= pretty_default(p['default']) %>``<% end %><% if p['required'] %> | ``REQUIRED``<% end %><% if p['deprecated'] %> | ``DEPRECATED``<% end %><% if p['name_property'] %> | **Default Value:** ``The resource block's name``<% end %> <% unless p['description'].nil? %> <%= p['description'].strip %><% end %> <% unless p['introduced'].nil? -%>\n\n *New in <%= branded_chef_client_name(p['introduced']) %> <%= p['introduced'] -%>.*\n<% end -%> <% end %> <% if @properties.empty? %>This resource does not have any properties.\n<% end -%> <%= boilerplate_content %> Examples ===================================================== The following examples demonstrate various approaches for using resources in recipes: <%= @examples -%> } FileUtils.mkdir_p "docs_site" resources = Chef::JSONCompat.parse(ResourceInspector.inspect) resources.each do |resource, data| next if ["scm", "whyrun_safe_ruby_block", "l_w_r_p_base", "user_resource_abstract_base_class", "linux_user", "pw_user", "aix_user", "dscl_user", "solaris_user", "windows_user", ""].include?(resource) puts "Writing out #{resource}." @name = resource @description = data["description"] @default_action = data["default_action"] @actions = (data["actions"] - ["nothing"]).sort @examples = data["examples"] @introduced = data["introduced"] @preview = data["preview"] @properties = data["properties"].reject { |v| v["name"] == "name" }.sort_by! { |v| v["name"] } @resource_block = generate_resource_block(resource, @properties) @property_list = friendly_properly_list(@properties) @examples = data["examples"] t = ERB.new(template, nil, "-") File.open("docs_site/resource_#{@name}.rst", "w") do |f| f.write t.result(binding) end end end end