# class RDoc::Store

A set of rdoc data for a single project (gem, path, etc.).

The store manages reading and writing ri data for a project and maintains a cache of methods, classes and ancestors in the store.

The store maintains a cache of its contents for faster lookup. After adding items to the store it must be flushed using save_cache. The cache contains the following structures:

    @cache = {
      :ancestors        => {}, # class name => ancestor names
      :attributes       => {}, # class name => attributes
      :class_methods    => {}, # class name => class methods
      :instance_methods => {}, # class name => instance methods
      :modules          => [], # classes and modules in this store
      :pages            => [], # page names
    }

### Attributes

c_class_variables[R]

Maps C variables to class or module names for each parsed C file.

c_singleton_class_variables[R]

Maps C variables to singleton class names for each parsed C file.

cache[R]

The contents of the Store

dry_run[RW]

If true this Store will not write any files

encoding[RW]

The encoding of the contents in the Store

path[RW]

Path this store reads or writes

rdoc[RW]

The RDoc::RDoc driver for this parse tree. This allows classes consulting the documentation tree to access user-set options, for example.

type[RW]

Type of ri datastore this was loaded from. See RDoc::RI::Driver, RDoc::RI::Paths.

### Public Class Methods

new(path = nil, type = nil) click to toggle source

Creates a new Store of `type` that will load or save to `path`

    # File lib/rdoc/store.rb, line 121
    def initialize path = nil, type = nil
      @dry_run  = false
      @encoding = nil
      @path     = path
      @rdoc     = nil
      @type     = type

      @cache = {
        :ancestors                   => {},
        :attributes                  => {},
        :class_methods               => {},
        :c_class_variables           => {},
        :c_singleton_class_variables => {},
        :encoding                    => @encoding,
        :instance_methods            => {},
        :main                        => nil,
        :modules                     => [],
        :pages                       => [],
        :title                       => nil,
      }

      @classes_hash = {}
      @modules_hash = {}
      @files_hash   = {}

      @c_enclosure_classes = {}
      @c_enclosure_names   = {}

      @c_class_variables           = {}
      @c_singleton_class_variables = {}

      @unique_classes = nil
      @unique_modules = nil
    end

### Public Instance Methods

add_c_enclosure(variable, namespace) click to toggle source

Adds `module` as an enclosure (namespace) for the given `variable` for C files.

    # File lib/rdoc/store.rb, line 160
    def add_c_enclosure variable, namespace
      @c_enclosure_classes[variable] = namespace
    end

add_c_variables(c_parser) click to toggle source

Adds C variables from an RDoc::Parser::C

    # File lib/rdoc/store.rb, line 167
    def add_c_variables c_parser
      filename = c_parser.top_level.relative_name

      @c_class_variables[filename] = make_variable_map c_parser.classes

      @c_singleton_class_variables[filename] = c_parser.singleton_classes
    end

add_file(absolute_name, relative_name = absolute_name) click to toggle source

Adds the file with `name` as an RDoc::TopLevel to the store. Returns the created RDoc::TopLevel.

    # File lib/rdoc/store.rb, line 179
    def add_file absolute_name, relative_name = absolute_name
      unless top_level = @files_hash[relative_name] then
        top_level = RDoc::TopLevel.new absolute_name, relative_name
        top_level.store = self
        @files_hash[relative_name] = top_level
      end

      top_level
    end

all_classes() click to toggle source

Returns all classes discovered by RDoc

    # File lib/rdoc/store.rb, line 192
    def all_classes
      @classes_hash.values
    end

all_classes_and_modules() click to toggle source

Returns all classes and modules discovered by RDoc

    # File lib/rdoc/store.rb, line 199
    def all_classes_and_modules
      @classes_hash.values + @modules_hash.values
    end

all_files() click to toggle source

All TopLevels known to RDoc

    # File lib/rdoc/store.rb, line 206
    def all_files
      @files_hash.values
    end

all_modules() click to toggle source

Returns all modules discovered by RDoc

    # File lib/rdoc/store.rb, line 213
    def all_modules
      modules_hash.values
    end

ancestors() click to toggle source

Ancestors cache accessor. Maps a klass name to an Array of its ancestors in this store. If Foo in this store inherits from Object, Kernel won't be listed (it will be included from ruby's ri store).

    # File lib/rdoc/store.rb, line 222
    def ancestors
      @cache[:ancestors]
    end

attributes() click to toggle source

Attributes cache accessor. Maps a class to an Array of its attributes.

    # File lib/rdoc/store.rb, line 229
    def attributes
      @cache[:attributes]
    end

cache_path() click to toggle source

Path to the cache file

    # File lib/rdoc/store.rb, line 236
    def cache_path
      File.join @path, 'cache.ri'
    end

class_file(klass_name) click to toggle source

Path to the ri data for `klass_name`

    # File lib/rdoc/store.rb, line 243
    def class_file klass_name
      name = klass_name.split('::').last
      File.join class_path(klass_name), "cdesc-#{name}.ri"
    end

class_methods() click to toggle source

Class methods cache accessor. Maps a class to an Array of its class methods (not full name).

    # File lib/rdoc/store.rb, line 252
    def class_methods
      @cache[:class_methods]
    end

class_path(klass_name) click to toggle source

Path where data for `klass_name` will be stored (methods or class data)

    # File lib/rdoc/store.rb, line 259
    def class_path klass_name
      File.join @path, *klass_name.split('::')
    end

classes_hash() click to toggle source

Hash of all classes known to RDoc

    # File lib/rdoc/store.rb, line 266
    def classes_hash
      @classes_hash
    end

complete(min_visibility) click to toggle source

Prepares the RDoc code object tree for use by a generator.

It finds unique classes/modules defined, and replaces classes/modules that are aliases for another one by a copy with RDoc::ClassModule#is_alias_for set.

It updates the RDoc::ClassModule#constant_aliases attribute of “real” classes or modules.

It also completely removes the classes and modules that should be removed from the documentation and the methods that have a visibility below `min_visibility`, which is the `--visibility` option.

See also RDoc::Context#remove_from_documentation?

    # File lib/rdoc/store.rb, line 302
    def complete min_visibility
      fix_basic_object_inheritance

      # cache included modules before they are removed from the documentation
      all_classes_and_modules.each { |cm| cm.ancestors }

      unless min_visibility == :nodoc then
        remove_nodoc @classes_hash
        remove_nodoc @modules_hash
      end

      @unique_classes = find_unique @classes_hash
      @unique_modules = find_unique @modules_hash

      unique_classes_and_modules.each do |cm|
        cm.complete min_visibility
      end

      @files_hash.each_key do |file_name|
        tl = @files_hash[file_name]

        unless tl.text? then
          tl.modules_hash.clear
          tl.classes_hash.clear

          tl.classes_or_modules.each do |cm|
            name = cm.full_name
            if cm.type == 'class' then
              tl.classes_hash[name] = cm if @classes_hash[name]
            else
              tl.modules_hash[name] = cm if @modules_hash[name]
            end
          end
        end
      end
    end

files_hash() click to toggle source

Hash of all files known to RDoc

    # File lib/rdoc/store.rb, line 342
    def files_hash
      @files_hash
    end

find_c_enclosure(variable) click to toggle source

Finds the enclosure (namespace) for the given C `variable`.

    # File lib/rdoc/store.rb, line 349
    def find_c_enclosure variable
      @c_enclosure_classes.fetch variable do
        break unless name = @c_enclosure_names[variable]

        mod = find_class_or_module name

        unless mod then
          loaded_mod = load_class_data name

          file = loaded_mod.in_files.first

          return unless file # legacy data source

          file.store = self

          mod = file.add_module RDoc::NormalModule, name
        end

        @c_enclosure_classes[variable] = mod
      end
    end

find_class_named(name) click to toggle source

Finds the class with `name` in all discovered classes

    # File lib/rdoc/store.rb, line 374
    def find_class_named name
      @classes_hash[name]
    end

find_class_named_from(name, from) click to toggle source

Finds the class with `name` starting in namespace `from`

    # File lib/rdoc/store.rb, line 381
    def find_class_named_from name, from
      from = find_class_named from unless RDoc::Context === from

      until RDoc::TopLevel === from do
        return nil unless from

        klass = from.find_class_named name
        return klass if klass

        from = from.parent
      end

      find_class_named name
    end

find_class_or_module(name) click to toggle source

Finds the class or module with `name`

    # File lib/rdoc/store.rb, line 399
    def find_class_or_module name
      name = $' if name =~ /^::/
      @classes_hash[name] || @modules_hash[name]
    end

find_file_named(name) click to toggle source

Finds the file with `name` in all discovered files

    # File lib/rdoc/store.rb, line 407
    def find_file_named name
      @files_hash[name]
    end

find_module_named(name) click to toggle source

Finds the module with `name` in all discovered modules

    # File lib/rdoc/store.rb, line 414
    def find_module_named name
      @modules_hash[name]
    end

find_text_page(file_name) click to toggle source

Returns the RDoc::TopLevel that is a text file and has the given `file_name`

    # File lib/rdoc/store.rb, line 422
    def find_text_page file_name
      @files_hash.each_value.find do |file|
        file.text? and file.full_name == file_name
      end
    end

find_unique(all_hash) click to toggle source

Finds unique classes/modules defined in `all_hash`, and returns them as an array. Performs the alias updates in `all_hash`: see ::complete.

    # File lib/rdoc/store.rb, line 435
    def find_unique all_hash
      unique = []

      all_hash.each_pair do |full_name, cm|
        unique << cm if full_name == cm.full_name
      end

      unique
    end

fix_basic_object_inheritance() click to toggle source

Fixes the erroneous `BasicObject < Object` in 1.9.

Because we assumed all classes without a stated superclass inherit from Object, we have the above wrong inheritance.

We fix BasicObject right away if we are running in a Ruby version >= 1.9.

    # File lib/rdoc/store.rb, line 454
    def fix_basic_object_inheritance
      basic = classes_hash['BasicObject']
      return unless basic
      basic.superclass = nil
    end

friendly_path() click to toggle source

Friendly rendition of path

    # File lib/rdoc/store.rb, line 463
    def friendly_path
      case type
      when :gem    then
        parent = File.expand_path '..', @path
        "gem #{File.basename parent}"
      when :home   then '~/.rdoc'
      when :site   then 'ruby site'
      when :system then 'ruby core'
      else @path
      end
    end

instance_methods() click to toggle source

Instance methods cache accessor. Maps a class to an Array of its instance methods (not full name).

    # File lib/rdoc/store.rb, line 483
    def instance_methods
      @cache[:instance_methods]
    end

load_all() click to toggle source

Loads all items from this store into memory. This recreates a documentation tree for use by a generator

    # File lib/rdoc/store.rb, line 491
    def load_all
      load_cache

      module_names.each do |module_name|
        mod = find_class_or_module(module_name) || load_class(module_name)

        # load method documentation since the loaded class/module does not have
        # it
        loaded_methods = mod.method_list.map do |method|
          load_method module_name, method.full_name
        end

        mod.method_list.replace loaded_methods

        loaded_attributes = mod.attributes.map do |attribute|
          load_method module_name, attribute.full_name
        end

        mod.attributes.replace loaded_attributes
      end

      all_classes_and_modules.each do |mod|
        descendent_re = /^#{mod.full_name}::[^:]+$/

        module_names.each do |name|
          next unless name =~ descendent_re

          descendent = find_class_or_module name

          case descendent
          when RDoc::NormalClass then
            mod.classes_hash[name] = descendent
          when RDoc::NormalModule then
            mod.modules_hash[name] = descendent
          end
        end
      end

      @cache[:pages].each do |page_name|
        page = load_page page_name
        @files_hash[page_name] = page
      end
    end

load_cache() click to toggle source

Loads cache file for this store

    # File lib/rdoc/store.rb, line 538
    def load_cache
      #orig_enc = @encoding

      open cache_path, 'rb' do |io|
        @cache = Marshal.load io.read
      end

      load_enc = @cache[:encoding]

      # TODO this feature will be time-consuming to add:
      # a) Encodings may be incompatible but transcodeable
      # b) Need to warn in the appropriate spots, wherever they may be
      # c) Need to handle cross-cache differences in encodings
      # d) Need to warn when generating into a cache with different encodings
      #
      #if orig_enc and load_enc != orig_enc then
      #  warn "Cached encoding #{load_enc} is incompatible with #{orig_enc}\n" \
      #       "from #{path}/cache.ri" unless
      #    Encoding.compatible? orig_enc, load_enc
      #end

      @encoding = load_enc unless @encoding

      @cache[:pages]                       ||= []
      @cache[:main]                        ||= nil
      @cache[:c_class_variables]           ||= {}
      @cache[:c_singleton_class_variables] ||= {}

      @cache[:c_class_variables].each do |_, map|
        map.each do |variable, name|
          @c_enclosure_names[variable] = name
        end
      end

      @cache
    rescue Errno::ENOENT
    end

load_class(klass_name) click to toggle source

Loads ri data for `klass_name` and hooks it up to this store.

    # File lib/rdoc/store.rb, line 579
    def load_class klass_name
      obj = load_class_data klass_name

      obj.store = self

      case obj
      when RDoc::NormalClass then
        @classes_hash[klass_name] = obj
      when RDoc::NormalModule then
        @modules_hash[klass_name] = obj
      end
    end

load_class_data(klass_name) click to toggle source

Loads ri data for `klass_name`

    # File lib/rdoc/store.rb, line 595
    def load_class_data klass_name
      file = class_file klass_name

      open file, 'rb' do |io|
        Marshal.load io.read
      end
    rescue Errno::ENOENT => e
      error = MissingFileError.new(self, file, klass_name)
      error.set_backtrace e.backtrace
      raise error
    end

load_method(klass_name, method_name) click to toggle source

Loads ri data for `method_name` in `klass_name`

    # File lib/rdoc/store.rb, line 610
    def load_method klass_name, method_name
      file = method_file klass_name, method_name

      open file, 'rb' do |io|
        obj = Marshal.load io.read
        obj.store = self
        obj.parent =
          find_class_or_module(klass_name) || load_class(klass_name) unless
            obj.parent
        obj
      end
    rescue Errno::ENOENT => e
      error = MissingFileError.new(self, file, klass_name + method_name)
      error.set_backtrace e.backtrace
      raise error
    end

load_page(page_name) click to toggle source

Loads ri data for `page_name`

    # File lib/rdoc/store.rb, line 630
    def load_page page_name
      file = page_file page_name

      open file, 'rb' do |io|
        obj = Marshal.load io.read
        obj.store = self
        obj
      end
    rescue Errno::ENOENT => e
      error = MissingFileError.new(self, file, page_name)
      error.set_backtrace e.backtrace
      raise error
    end

main() click to toggle source

Gets the main page for this RDoc store. This page is used as the root of the RDoc server.

    # File lib/rdoc/store.rb, line 648
    def main
      @cache[:main]
    end

main=(page) click to toggle source

Sets the main page for this RDoc store.

    # File lib/rdoc/store.rb, line 655
    def main= page
      @cache[:main] = page
    end

make_variable_map(variables) click to toggle source

Converts the variable => ClassModule map `variables` from a C parser into a variable => class name map.

    # File lib/rdoc/store.rb, line 663
    def make_variable_map variables
      map = {}

      variables.each { |variable, class_module|
        map[variable] = class_module.full_name
      }

      map
    end

method_file(klass_name, method_name) click to toggle source

Path to the ri data for `method_name` in `klass_name`

    # File lib/rdoc/store.rb, line 676
    def method_file klass_name, method_name
      method_name = method_name.split('::').last
      method_name =~ /#(.*)/
      method_type = $1 ? 'i' : 'c'
      method_name = $1 if $1
      method_name = method_name.gsub(/\W/) { "%%%02x" % $&[0].ord }

      File.join class_path(klass_name), "#{method_name}-#{method_type}.ri"
    end

module_names() click to toggle source

Modules cache accessor. An Array of all the module (and class) names in the store.

    # File lib/rdoc/store.rb, line 690
    def module_names
      @cache[:modules]
    end

modules_hash() click to toggle source

Hash of all modules known to RDoc

    # File lib/rdoc/store.rb, line 697
    def modules_hash
      @modules_hash
    end

page(name) click to toggle source

Returns the RDoc::TopLevel that is a text file and has the given `name`

    # File lib/rdoc/store.rb, line 704
    def page name
      @files_hash.each_value.find do |file|
        file.text? and file.page_name == name
      end
    end

page_file(page_name) click to toggle source

Path to the ri data for `page_name`

    # File lib/rdoc/store.rb, line 713
    def page_file page_name
      file_name = File.basename(page_name).gsub('.', '_')

      File.join @path, File.dirname(page_name), "page-#{file_name}.ri"
    end

remove_nodoc(all_hash) click to toggle source

Removes from `all_hash` the contexts that are nodoc or have no content.

See RDoc::Context#remove_from_documentation?

    # File lib/rdoc/store.rb, line 724
    def remove_nodoc all_hash
      all_hash.keys.each do |name|
        context = all_hash[name]
        all_hash.delete(name) if context.remove_from_documentation?
      end
    end

save() click to toggle source

Saves all entries in the store

    # File lib/rdoc/store.rb, line 734
    def save
      load_cache

      all_classes_and_modules.each do |klass|
        save_class klass

        klass.each_method do |method|
          save_method klass, method
        end

        klass.each_attribute do |attribute|
          save_method klass, attribute
        end
      end

      all_files.each do |file|
        save_page file
      end

      save_cache
    end

save_cache() click to toggle source

Writes the cache file for this store

    # File lib/rdoc/store.rb, line 759
    def save_cache
      clean_cache_collection @cache[:ancestors]
      clean_cache_collection @cache[:attributes]
      clean_cache_collection @cache[:class_methods]
      clean_cache_collection @cache[:instance_methods]

      @cache[:modules].uniq!
      @cache[:modules].sort!

      @cache[:pages].uniq!
      @cache[:pages].sort!

      @cache[:encoding] = @encoding # this gets set twice due to assert_cache

      @cache[:c_class_variables].merge!           @c_class_variables
      @cache[:c_singleton_class_variables].merge! @c_singleton_class_variables

      return if @dry_run

      marshal = Marshal.dump @cache

      open cache_path, 'wb' do |io|
        io.write marshal
      end
    end

save_class(klass) click to toggle source

Writes the ri data for `klass` (or module)

    # File lib/rdoc/store.rb, line 788
    def save_class klass
      full_name = klass.full_name

      FileUtils.mkdir_p class_path(full_name) unless @dry_run

      @cache[:modules] << full_name

      path = class_file full_name

      begin
        disk_klass = load_class full_name

        klass = disk_klass.merge klass
      rescue MissingFileError
      end

      # BasicObject has no ancestors
      ancestors = klass.direct_ancestors.compact.map do |ancestor|
        # HACK for classes we don't know about (class X < RuntimeError)
        String === ancestor ? ancestor : ancestor.full_name
      end

      @cache[:ancestors][full_name] ||= []
      @cache[:ancestors][full_name].concat ancestors

      attribute_definitions = klass.attributes.map do |attribute|
        "#{attribute.definition} #{attribute.name}"
      end

      unless attribute_definitions.empty? then
        @cache[:attributes][full_name] ||= []
        @cache[:attributes][full_name].concat attribute_definitions
      end

      to_delete = []

      unless klass.method_list.empty? then
        @cache[:class_methods][full_name]    ||= []
        @cache[:instance_methods][full_name] ||= []

        class_methods, instance_methods =
          klass.method_list.partition { |meth| meth.singleton }

        class_methods    = class_methods.   map { |method| method.name }
        instance_methods = instance_methods.map { |method| method.name }
        attribute_names  = klass.attributes.map { |attr|   attr.name }

        old = @cache[:class_methods][full_name] - class_methods
        to_delete.concat old.map { |method|
          method_file full_name, "#{full_name}::#{method}"
        }

        old = @cache[:instance_methods][full_name] -
          instance_methods - attribute_names
        to_delete.concat old.map { |method|
          method_file full_name, "#{full_name}##{method}"
        }

        @cache[:class_methods][full_name]    = class_methods
        @cache[:instance_methods][full_name] = instance_methods
      end

      return if @dry_run

      FileUtils.rm_f to_delete

      marshal = Marshal.dump klass

      open path, 'wb' do |io|
        io.write marshal
      end
    end

save_method(klass, method) click to toggle source

Writes the ri data for `method` on `klass`

    # File lib/rdoc/store.rb, line 864
    def save_method klass, method
      full_name = klass.full_name

      FileUtils.mkdir_p class_path(full_name) unless @dry_run

      cache = if method.singleton then
                @cache[:class_methods]
              else
                @cache[:instance_methods]
              end
      cache[full_name] ||= []
      cache[full_name] << method.name

      return if @dry_run

      marshal = Marshal.dump method

      open method_file(full_name, method.full_name), 'wb' do |io|
        io.write marshal
      end
    end

save_page(page) click to toggle source

Writes the ri data for `page`

    # File lib/rdoc/store.rb, line 889
    def save_page page
      return unless page.text?

      path = page_file page.full_name

      FileUtils.mkdir_p File.dirname(path) unless @dry_run

      cache[:pages] ||= []
      cache[:pages] << page.full_name

      return if @dry_run

      marshal = Marshal.dump page

      open path, 'wb' do |io|
        io.write marshal
      end
    end

source() click to toggle source

Source of the contents of this store.

For a store from a gem the source is the gem name. For a store from the home directory the source is “home”. For system ri store (the standard library documentation) the source is“ruby”. For a store from the site ri directory the store is “site”. For other stores the source is the path.

    # File lib/rdoc/store.rb, line 917
    def source
      case type
      when :gem    then File.basename File.expand_path '..', @path
      when :home   then 'home'
      when :site   then 'site'
      when :system then 'ruby'
      else @path
      end
    end

title() click to toggle source

Gets the title for this RDoc store. This is used as the title in each page on the RDoc server

    # File lib/rdoc/store.rb, line 931
    def title
      @cache[:title]
    end

title=(title) click to toggle source

Sets the title page for this RDoc store.

    # File lib/rdoc/store.rb, line 938
    def title= title
      @cache[:title] = title
    end

unique_classes() click to toggle source

Returns the unique classes discovered by RDoc.

::complete must have been called prior to using this method.

    # File lib/rdoc/store.rb, line 947
    def unique_classes
      @unique_classes
    end

unique_classes_and_modules() click to toggle source

Returns the unique classes and modules discovered by RDoc. ::complete must have been called prior to using this method.

    # File lib/rdoc/store.rb, line 955
    def unique_classes_and_modules
      @unique_classes + @unique_modules
    end

unique_modules() click to toggle source

Returns the unique modules discovered by RDoc. ::complete must have been called prior to using this method.

    # File lib/rdoc/store.rb, line 963
    def unique_modules
      @unique_modules
    end