Class: YARD::I18n::PotGenerator

### Home Classes Methods

### In Files

- lib/yard/i18n/pot_generator.rb

### Parent

Object

### Methods

- ::new
- #generate
- #parse_files
- #parse_objects

### Files

- LICENSE.txt
- MIT.txt

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No matching classes.

# YARD::I18n::PotGenerator

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 tranlsate "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} for {CodeObjects::Base}

- {parse_files} for {CodeObjects::ExtraFileObject}

{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".

@example 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 www.gnu.org/software/gettext/manual/html_node/PO-Files.html

    GNU gettext manual about details of PO file

### Attributes

messages[R]

Extracted messages.

@return [Messages] @since 0.8.1

### Public Class Methods

new(relative_base_path) click to toggle source

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

@param [String] relative_base_path a relative working

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

    # File lib/yard/i18n/pot_generator.rb, line 78
    def initialize(relative_base_path)
      @relative_base_path = relative_base_path
      @extracted_objects = {}
      @messages = Messages.new
    end

### Public Instance Methods

generate() click to toggle source

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 translater-comment line that is started with "# ".

@return [String] POT format string

    # File lib/yard/i18n/pot_generator.rb, line 121
    def generate
      pot = header
      sorted_messages = @messages.sort_by do |message|
        sorted_locations = message.locations.sort_by do |location|
          location
        end
        sorted_locations.first || []
      end
      sorted_messages.each do |message|
        generate_message(pot, message)
      end
      pot
    end

parse_files(files) click to toggle source

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

@param [Array<CodeObjects::ExtraFileObject>] files a list

    of {CodeObjects::ExtraFileObject} objects to be parsed.

@return [void]

    # File lib/yard/i18n/pot_generator.rb, line 102
    def parse_files(files)
      files.each do |file|
        extract_paragraphs(file)
      end
    end

parse_objects(objects) click to toggle source

Parses {CodeObjects::Base} objects and stores extracted msgids into {messages}

@param [Array<CodeObjects::Base>] objects a list of

    {CodeObjects::Base} to be parsed.

@return [void]

    # File lib/yard/i18n/pot_generator.rb, line 90
    def parse_objects(objects)
      objects.each do |object|
        extract_documents(object)
      end
    end

[Validate]

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