Class: YARD::Server::LibraryVersion

Relationships & Source Files
Inherits:	Object
Defined in:	lib/yard/server/library_version.rb

Overview

A library version encapsulates a library's documentation at a specific version. Although the version is optional, this allows for creating multiple documentation points for a specific library, each representing a unique version. The term "library" used in other parts of the ::YARD::Server documentation refers to objects of this class unless otherwise noted.

A library points to a location where a #yardoc_file is located so that its documentation may be loaded and served. Optionally, a #source_path is given to point to a location where any extra files (and .yardopts) should be loaded from. Both of these methods may not be known immediately, since the yardoc file may not be built until later. Resolving the yardoc file and source path are dependent on the specific library "source type" used. Source types (known as "library source") are discussed in detail below.

Using with Adapters

A list of libraries need to be passed into adapters upon creation. In most cases, you will never do this manually, but if you use a RackMiddleware, you will need to pass in this list yourself. To build this list of libraries, you should create a hash of library names mapped to an Array of LibraryVersion objects. For example:

=> [LibraryVersion.new('mylib', '1.0', ...), LibraryVersion.new('mylib', '2.0', ...)]

Note that you can also use Adapter#add_library for convenience.

The "array" part is required, even for just one library version.

Library Sources

The #source method represents the library source type, ie. where the library "comes from". It might come from "disk", or it might come from a "gem" (technically the disk, but a separate type nonetheless). In these two cases, the yardoc file sits somewhere on your filesystem, though it may also be built dynamically if it does not yet exist. This behaviour is controlled through the #prepare! method, which prepares the yardoc file given a specific library source. We will see how this works in detail in the following section.

Implementing a Custom Library Source

::YARD can be extended to support custom library sources in order to build or retrieve a yardoc file at runtime from many different locations.

To implement this behaviour, 3 methods can be added to the LibraryVersion class, #load_yardoc_from_SOURCE, #yardoc_file_for_SOURCE, and #source_path_for_SOURCE. In all cases, "SOURCE" represents the source type used in #source when creating the library object. The #yardoc_file_for_SOURCE and #source_path_for_SOURCE methods are called upon creation and should return the location where the source code for the library lives. The load method is called from #prepare! if there is no yardoc file and should set #yardoc_file. Below is a full example for implementing a custom library source, :http, which reads packaged .yardoc databases from zipped archives off of an HTTP server.

Note that only #load_yardoc_from_SOURCE is required. The other two methods are optional and can be set manually (via #source_path= and #yardoc_file=) on the object at any time.

Examples:

Implementing a Custom Library Source

# Adds the source type "http" for .yardoc files zipped on HTTP servers
class LibraryVersion
  def load_yardoc_from_http
    Thread.new do
      # zip/unzip method implementations are not shown
      download_zip_file("http://mysite.com/yardocs/#{self}.zip")
      unzip_file_to("/path/to/yardocs/#{self}")
    end

    # tell the server it's not ready yet (but it might be next time)
    raise LibraryNotPreparedError
  end

  def yardoc_file_for_http
    "/path/to/yardocs/#{self}/.yardoc"
  end

  def source_path_for_http
    File.dirname(yardoc_file)
  end
end

# Creating a library of this source type:
LibraryVersion.new('name', '1.0', nil, :http)

Since:

0.6.0

Class Method Summary

.new(name, version = nil, yardoc = nil, source = :disk) ⇒ LibraryVersion constructor

Instance Method Summary

#==(other)

Alias for #eql?.
#eql?(other) ⇒ Boolean (also: #==, #equal?)
#equal?(other)

Alias for #eql?.
#gemspec ⇒ Gem::Specification^?
#hash ⇒ Fixnum
#prepare!

Prepares a library to be displayed by the server.
#to_s(url_format = true) ⇒ String
#load_source_path private
#load_yardoc_file private
#serializer private

Constructor Details

.new(name, version = nil, yardoc = nil, source = :disk) ⇒ `LibraryVersion`

Parameters:

name (String) —
the name of the library
version (String) (defaults to: nil) —
the specific (usually, but not always, numeric) library version
yardoc (String) (defaults to: nil) —
the location of the yardoc file, or nil if it is generated later
source (Symbol) (defaults to: :disk) —
the location of the files used to build the yardoc. Builtin source types are :disk or :gem.

Since:

0.6.0

[ GitHub ]

# File 'lib/yard/server/library_version.rb', line 134


def initialize(name, version = nil, yardoc = nil, source = :disk)
  self.name = name
  self.yardoc_file = yardoc
  self.version = version
  self.source = source
end

Instance Attribute Details

#name ⇒ String (rw)

Returns:

(String) —
the name of the library

Since:

0.6.0

[ GitHub ]

# File 'lib/yard/server/library_version.rb', line 96


attr_accessor :name

#ready? ⇒ `Boolean` (readonly)

Returns:

(Boolean) —
whether the library has been completely processed and is ready to be served

Since:

0.6.0

[ GitHub ]

# File 'lib/yard/server/library_version.rb', line 162


def ready?
  return false if yardoc_file.nil?
  serializer.complete?
end

#source ⇒ `Symbol` (rw)

Returns:

(Symbol) —
the source type representing where the yardoc should be loaded from. Defaults are :disk and :gem, though custom sources may be implemented. This value is used to inform #prepare! about how to load the necessary data in order to display documentation for an object.

#source_path ⇒ String^? (rw)

Returns:

(String) —
the location of the source code for a library. This value is filled by calling #source_path_for_SOURCE on this class.
(nil) —
if there is no source code

#source_path=(value) (rw)

Since:

0.6.0

[ GitHub ]

# File 'lib/yard/server/library_version.rb', line 125


attr_writer :source_path

#version ⇒ String (rw)

Returns:

(String) —
the version of the specific library

Since:

0.6.0

[ GitHub ]

# File 'lib/yard/server/library_version.rb', line 99


attr_accessor :version

#yardoc_file ⇒ String^? (rw)

Note:

To implement a custom yardoc file getter, implement

Returns:

(String) —
the location of the yardoc file used to load the object information from.
(nil) —
if no yardoc file exists yet. In this case, #prepare! will be called on this library to build the yardoc file.

Since:

0.6.0

[ GitHub ]

# File 'lib/yard/server/library_version.rb', line 106


def yardoc_file
  @yardoc_file ||= load_yardoc_file
end

#yardoc_file=(value) (rw)

Since:

0.6.0

[ GitHub ]

# File 'lib/yard/server/library_version.rb', line 109


attr_writer :yardoc_file

Instance Method Details

#==(other)

Alias for #eql?.

[ GitHub ]

# File 'lib/yard/server/library_version.rb', line 157


alias == eql?

#eql?(other) ⇒ `Boolean` Also known as: #==, #equal?

Returns:

(Boolean) —
whether another LibraryVersion is equal to this one

Since:

0.6.0

[ GitHub ]

# File 'lib/yard/server/library_version.rb', line 153


def eql?(other)
  other.is_a?(LibraryVersion) && other.name == name &&
    other.version == version && other.yardoc_file == yardoc_file
end

#equal?(other)

Alias for #eql?.

[ GitHub ]

# File 'lib/yard/server/library_version.rb', line 158


alias equal? eql?

#gemspec ⇒ `Gem::Specification`^?

Returns:

(Gem::Specification) —
a gemspec object for a given library. Used for :gem source types.
(nil) —
if there is no installed gem for the library

Since:

0.6.0

[ GitHub ]

# File 'lib/yard/server/library_version.rb', line 191


def gemspec
  ver = version ? "= #{version}" : ">= 0"
  YARD::GemIndex.find_all_by_name(name, ver).last
end

#hash ⇒ `Fixnum`

Returns:

(Fixnum) —
used for ::Hash mapping.

Since:

0.6.0

[ GitHub ]

# File 'lib/yard/server/library_version.rb', line 150


def hash; to_s.hash end

#load_source_path (private)

Since:

0.6.0

[ GitHub ]

# File 'lib/yard/server/library_version.rb', line 261


def load_source_path
  meth = "source_path_for_#{source}"
  send(meth) if respond_to?(meth, true)
end

#load_yardoc_file (private)

Since:

0.6.0

[ GitHub ]

# File 'lib/yard/server/library_version.rb', line 266


def load_yardoc_file
  meth = "yardoc_file_for_#{source}"
  send(meth) if respond_to?(meth, true)
end

#prepare!

Note:

You should not directly override this method. Instead, implement load_yardoc_from_SOURCENAME when implementing loading for a specific source type. See the LibraryVersion documentation for "Implementing a Custom Library Source"

Prepares a library to be displayed by the server. This callback is performed before each request on a library to ensure that it is loaded and ready to be viewed. If any steps need to be performed prior to loading, they are performed through this method (though they should be implemented through the load_yardoc_from_SOURCE method).

Raises:

(LibraryNotPreparedError) —
if the library is not ready to be displayed. Usually when raising this error, you would simultaneously begin preparing the library for subsequent requests, although this is not necessary.

Since:

0.6.0

[ GitHub ]

# File 'lib/yard/server/library_version.rb', line 182


def prepare!
  return if ready?
  meth = "load_yardoc_from_#{source}"
  send(meth) if respond_to?(meth, true)
end

#serializer (private)

Since:

0.6.0

[ GitHub ]

# File 'lib/yard/server/library_version.rb', line 271


def serializer
  return if yardoc_file.nil?
  Serializers::YardocSerializer.new(yardoc_file)
end

#to_s(url_format = true) ⇒ String

Parameters:

url_format (Boolean) (defaults to: true) —
if true, returns the string in a URI-compatible format (for appending to a URL). Otherwise, it is given in a more human readable format.

Returns:

(String) —
the string representation of the library.

Since:

0.6.0

[ GitHub ]

# File 'lib/yard/server/library_version.rb', line 145


def to_s(url_format = true)
  version ? "#{name}#{url_format ? '/' : '-'}#{version}" : name.to_s
end

Class: YARD::Server::LibraryVersion

Overview

Using with Adapters

Library Sources

Implementing a Custom Library Source

Class Method Summary

Instance Attribute Summary

Instance Method Summary

Constructor Details

.new(name, version = nil, yardoc = nil, source = :disk) ⇒ LibraryVersion

Instance Attribute Details

#name ⇒ String (rw)

#ready? ⇒ Boolean (readonly)

#source ⇒ Symbol (rw)

#source_path ⇒ String? (rw)

#source_path=(value) (rw)

#version ⇒ String (rw)

#yardoc_file ⇒ String? (rw)

#yardoc_file=(value) (rw)

Instance Method Details

#==(other)

#eql?(other) ⇒ Boolean Also known as: #==, #equal?

#equal?(other)

#gemspec ⇒ Gem::Specification?

#hash ⇒ Fixnum

#load_source_path (private)

#load_yardoc_file (private)

#prepare!

#serializer (private)

#to_s(url_format = true) ⇒ String

.new(name, version = nil, yardoc = nil, source = :disk) ⇒ `LibraryVersion`

#ready? ⇒ `Boolean` (readonly)

#source ⇒ `Symbol` (rw)

#source_path ⇒ String^? (rw)

#yardoc_file ⇒ String^? (rw)

#eql?(other) ⇒ `Boolean` Also known as: #==, #equal?

#gemspec ⇒ `Gem::Specification`^?

#hash ⇒ `Fixnum`