Class: YARD::I18n::PotGenerator

Inherits:
Object
  • Object
show all
Defined in:
lib/yard/i18n/pot_generator.rb

Overview

The PotGenerator generates POT format string from CodeObjects::Base and CodeObjects::ExtraFileObject.

POT and PO

POT is an acronym for “Portable Object Template”. POT is a template file to create PO file. The extension for POT is “.pot”. PO file is an acronym for “Portable Object”. PO file has many parts of message ID (msgid) that is translation target message and message string (msgstr) that is translated message of message ID. If you want to translate “Hello” in English into “Bonjour” in French, “Hello” is the msgid ID and “Bonjour” is msgstr. The extension for PO is “.po”.

How to extract msgids

The PotGenerator has two parse methods:

#parse_objects extracts msgids from docstring and tags of CodeObjects::Base objects. The docstring of CodeObjects::Base object is parsed and a paragraph is extracted as a msgid. Tag name and tag text are extracted as msgids from a tag.

#parse_files extracts msgids from CodeObjects::ExtraFileObject objects. The file content of CodeObjects::ExtraFileObject object is parsed and a paragraph is extracted as a msgid.

Usage

To create a .pot file by PotGenerator, instantiate a PotGenerator with a relative working directory path from a directory path that has created .pot file, parse CodeObjects::Base objects and CodeObjects::ExtraFileObject objects, generate a POT and write the generated POT to a .pot file. The relative working directory path is “..” when the working directory path is “.” and the POT is wrote into “po/yard.pot”.

Examples:

Generate a .pot file

po_file_path = "po/yard.pot"
po_file_directory_pathname = Pathname.new(po_file_path).directory)
working_directory_pathname = Pathname.new(".")
relative_base_path = working_directory_pathname.relative_path_from(po_file_directory_pathname).to_s
# relative_base_path -> ".."
generator = YARD::I18n::PotGenerator.new(relative_base_path)
generator.parse_objects(objects)
generator.parse_files(files)
pot = generator.generate
po_file_directory_pathname.mkpath
File.open(po_file_path, "w") do |pot_file|
  pot_file.print(pot)
end

See Also:

Since:

  • 0.8.0

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(relative_base_path) ⇒ PotGenerator

Creates a POT generator that uses relative_base_path to generate locations for a msgid. relative_base_path is prepended to all locations.

Parameters:

  • relative_base_path (String) —

    a relative working directory path from a directory path that has created .pot file.

Since:

  • 0.8.0



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# File 'lib/yard/i18n/pot_generator.rb', line 79

def initialize(relative_base_path)
  @relative_base_path = relative_base_path
  @extracted_objects = {}
  @messages = Messages.new
end

Instance Attribute Details

#messages ⇒ Messages (readonly)

Extracted messages.

Returns:

Since:

  • 0.8.1



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# File 'lib/yard/i18n/pot_generator.rb', line 70

def messages
  @messages
end

Instance Method Details

#generate ⇒ String

Generates POT from @messages.

One PO file entry is generated from a Message in @messages.

Locations of the Message are used to generate the reference line that is started with “#: ”. relative_base_path passed when the generater is created is prepended to each path in location.

Comments of the Message are used to generate the translator-comment line that is started with “# ”.

Returns:

  • (String) —

    POT format string

Since:

  • 0.8.0



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# File 'lib/yard/i18n/pot_generator.rb', line 122

def generate
  pot = String.new(header)
  sorted_messages = @messages.sort_by do |message|
    sorted_locations = message.locations.sort
    sorted_locations.first || []
  end
  sorted_messages.each do |message|
    generate_message(pot, message)
  end
  pot
end

#parse_files(files) ⇒ void

This method returns an undefined value.

Parses CodeObjects::ExtraFileObject objects and stores extracted msgids into #messages.

Parameters:

Since:

  • 0.8.0



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# File 'lib/yard/i18n/pot_generator.rb', line 103

def parse_files(files)
  files.each do |file|
    extract_paragraphs(file)
  end
end

#parse_objects(objects) ⇒ void

This method returns an undefined value.

Parses CodeObjects::Base objects and stores extracted msgids into #messages

Parameters:

Since:

  • 0.8.0



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# File 'lib/yard/i18n/pot_generator.rb', line 91

def parse_objects(objects)
  objects.each do |object|
    extract_documents(object)
  end
end