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# frozen_string_literal: true
require 'fileutils'
##
# 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
# }
#--
# TODO need to prune classes
class RDoc::Store
##
# Errors raised from loading or saving the store
class Error < RDoc::Error
end
##
# Raised when a stored file for a class, module, page or method is missing.
class MissingFileError < Error
##
# The store the file should exist in
attr_reader :store
##
# The file the #name should be saved as
attr_reader :file
##
# The name of the object the #file would be loaded from
attr_reader :name
##
# Creates a new MissingFileError for the missing +file+ for the given
# +name+ that should have been in the +store+.
def initialize store, file, name
@store = store
@file = file
@name = name
end
def message # :nodoc:
"store at #{@store.path} missing file #{@file} for #{@name}"
end
end
##
# Stores the name of the C variable a class belongs to. This helps wire up
# classes defined from C across files.
attr_reader :c_enclosure_classes # :nodoc:
attr_reader :c_enclosure_names # :nodoc:
##
# Maps C variables to class or module names for each parsed C file.
attr_reader :c_class_variables
##
# Maps C variables to singleton class names for each parsed C file.
attr_reader :c_singleton_class_variables
##
# If true this Store will not write any files
attr_accessor :dry_run
##
# Path this store reads or writes
attr_accessor :path
##
# The RDoc::RDoc driver for this parse tree. This allows classes consulting
# the documentation tree to access user-set options, for example.
attr_accessor :rdoc
##
# Type of ri datastore this was loaded from. See RDoc::RI::Driver,
# RDoc::RI::Paths.
attr_accessor :type
##
# The contents of the Store
attr_reader :cache
##
# The encoding of the contents in the Store
attr_accessor :encoding
##
# Creates a new Store of +type+ that will load or save to +path+
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
##
# Adds +module+ as an enclosure (namespace) for the given +variable+ for C
# files.
def add_c_enclosure variable, namespace
@c_enclosure_classes[variable] = namespace
end
##
# Adds C variables from an RDoc::Parser::C
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
##
# Adds the file with +name+ as an RDoc::TopLevel to the store. Returns the
# created RDoc::TopLevel.
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
##
# Returns all classes discovered by RDoc
def all_classes
@classes_hash.values
end
##
# Returns all classes and modules discovered by RDoc
def all_classes_and_modules
@classes_hash.values + @modules_hash.values
end
##
# All TopLevels known to RDoc
def all_files
@files_hash.values
end
##
# Returns all modules discovered by RDoc
def all_modules
modules_hash.values
end
##
# 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).
def ancestors
@cache[:ancestors]
end
##
# Attributes cache accessor. Maps a class to an Array of its attributes.
def attributes
@cache[:attributes]
end
##
# Path to the cache file
def cache_path
File.join @path, 'cache.ri'
end
##
# Path to the ri data for +klass_name+
def class_file klass_name
name = klass_name.split('::').last
File.join class_path(klass_name), "cdesc-#{name}.ri"
end
##
# Class methods cache accessor. Maps a class to an Array of its class
# methods (not full name).
def class_methods
@cache[:class_methods]
end
##
# Path where data for +klass_name+ will be stored (methods or class data)
def class_path klass_name
File.join @path, *klass_name.split('::')
end
##
# Hash of all classes known to RDoc
def classes_hash
@classes_hash
end
##
# Removes empty items and ensures item in each collection are unique and
# sorted
def clean_cache_collection collection # :nodoc:
collection.each do |name, item|
if item.empty? then
collection.delete name
else
# HACK mongrel-1.1.5 documents its files twice
item.uniq!
item.sort!
end
end
end
##
# 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 <tt>--visibility</tt> option.
#
# See also RDoc::Context#remove_from_documentation?
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
##
# Hash of all files known to RDoc
def files_hash
@files_hash
end
##
# Finds the enclosure (namespace) for the given C +variable+.
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
##
# Finds the class with +name+ in all discovered classes
def find_class_named name
@classes_hash[name]
end
##
# Finds the class with +name+ starting in namespace +from+
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
##
# Finds the class or module with +name+
def find_class_or_module name
name = $' if name =~ /^::/
@classes_hash[name] || @modules_hash[name]
end
##
# Finds the file with +name+ in all discovered files
def find_file_named name
@files_hash[name]
end
##
# Finds the module with +name+ in all discovered modules
def find_module_named name
@modules_hash[name]
end
##
# Returns the RDoc::TopLevel that is a text file and has the given
# +file_name+
def find_text_page file_name
@files_hash.each_value.find do |file|
file.text? and file.full_name == file_name
end
end
##
# Finds unique classes/modules defined in +all_hash+,
# and returns them as an array. Performs the alias
# updates in +all_hash+: see ::complete.
#--
# TODO aliases should be registered by Context#add_module_alias
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
##
# Fixes the erroneous <tt>BasicObject < Object</tt> 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.
def fix_basic_object_inheritance
basic = classes_hash['BasicObject']
return unless basic
basic.superclass = nil
end
##
# Friendly rendition of #path
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
def inspect # :nodoc:
"#<%s:0x%x %s %p>" % [self.class, object_id, @path, module_names.sort]
end
##
# Instance methods cache accessor. Maps a class to an Array of its
# instance methods (not full name).
def instance_methods
@cache[:instance_methods]
end
##
# Loads all items from this store into memory. This recreates a
# documentation tree for use by a generator
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
##
# Loads cache file for this store
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
##
# Loads ri data for +klass_name+ and hooks it up to this store.
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
##
# Loads ri data for +klass_name+
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
##
# Loads ri data for +method_name+ in +klass_name+
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
##
# Loads ri data for +page_name+
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
##
# Gets the main page for this RDoc store. This page is used as the root of
# the RDoc server.
def main
@cache[:main]
end
##
# Sets the main page for this RDoc store.
def main= page
@cache[:main] = page
end
##
# Converts the variable => ClassModule map +variables+ from a C parser into
# a variable => class name map.
def make_variable_map variables
map = {}
variables.each { |variable, class_module|
map[variable] = class_module.full_name
}
map
end
##
# Path to the ri data for +method_name+ in +klass_name+
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
##
# Modules cache accessor. An Array of all the module (and class) names in
# the store.
def module_names
@cache[:modules]
end
##
# Hash of all modules known to RDoc
def modules_hash
@modules_hash
end
##
# Returns the RDoc::TopLevel that is a text file and has the given +name+
def page name
@files_hash.each_value.find do |file|
file.text? and file.page_name == name
end
end
##
# Path to the ri data for +page_name+
def page_file page_name
file_name = File.basename(page_name).gsub('.', '_')
File.join @path, File.dirname(page_name), "page-#{file_name}.ri"
end
##
# Removes from +all_hash+ the contexts that are nodoc or have no content.
#
# See RDoc::Context#remove_from_documentation?
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
##
# Saves all entries in the store
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
##
# Writes the cache file for this store
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
##
# Writes the ri data for +klass+ (or module)
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
##
# Writes the ri data for +method+ on +klass+
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
##
# Writes the ri data for +page+
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 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.
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
##
# Gets the title for this RDoc store. This is used as the title in each
# page on the RDoc server
def title
@cache[:title]
end
##
# Sets the title page for this RDoc store.
def title= title
@cache[:title] = title
end
##
# Returns the unique classes discovered by RDoc.
#
# ::complete must have been called prior to using this method.
def unique_classes
@unique_classes
end
##
# Returns the unique classes and modules discovered by RDoc.
# ::complete must have been called prior to using this method.
def unique_classes_and_modules
@unique_classes + @unique_modules
end
##
# Returns the unique modules discovered by RDoc.
# ::complete must have been called prior to using this method.
def unique_modules
@unique_modules
end
end