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File Name : setup.txt

.. -*- mode: rst; encoding: utf-8 -*-

================================
Distutils/Setuptools Integration
================================

Babel provides commands for integration into ``setup.py`` scripts, based on
either the ``distutils`` package that is part of the Python standard library,
or the third-party ``setuptools`` package.

These commands are available by default when Babel has been properly installed,
and ``setup.py`` is using ``setuptools``. For projects that use plain old
``distutils``, the commands need to be registered explicitly, for example:

.. code-block:: python

from distutils.core import setup
    from babel.messages import frontend as babel
    
    setup(
        ...
        cmdclass = {'compile_catalog': babel.compile_catalog,
                    'extract_messages': babel.extract_messages,
                    'init_catalog': babel.init_catalog,
                    'update_catalog': babel.update_catalog}
    )

.. contents:: Contents
   :depth: 2
.. sectnum::

compile_catalog
===============

The ``compile_catalog`` command is similar to the GNU ``msgfmt`` tool, in that
it takes a message catalog from a PO file and compiles it to a binary MO file.

If the command has been correctly installed or registered, a project's
``setup.py`` script should allow you to use the command::

$ ./setup.py compile_catalog --help
    Global options:
      --verbose (-v)  run verbosely (default)
      --quiet (-q)    run quietly (turns verbosity off)
      --dry-run (-n)  don't actually do anything
      --help (-h)     show detailed help message
    
    Options for 'compile_catalog' command:
       ...

Running the command will produce a binary MO file::

$ ./setup.py compile_catalog --directory foobar/locale --locale pt_BR
    running compile_catalog
    compiling catalog to foobar/locale/pt_BR/LC_MESSAGES/messages.mo

Options
-------

The ``compile_catalog`` command accepts the following options:

+-----------------------------+---------------------------------------------+
  | Option                      | Description                                 |
  +=============================+=============================================+
  | ``--domain``                | domain of the PO file (defaults to          |
  |                             | lower-cased project name)                   |
  +-----------------------------+---------------------------------------------+
  | ``--directory`` (``-d``)    | name of the base directory                  |
  +-----------------------------+---------------------------------------------+
  | ``--input-file`` (``-i``)   | name of the input file                      |
  +-----------------------------+---------------------------------------------+
  | ``--output-file`` (``-o``)  | name of the output file                     |
  +-----------------------------+---------------------------------------------+
  | ``--locale`` (``-l``)       | locale for the new localized string         |
  +-----------------------------+---------------------------------------------+
  | ``--use-fuzzy`` (``-f``)    | also include "fuzzy" translations           |
  +-----------------------------+---------------------------------------------+
  | ``--statistics``            | print statistics about translations         |
  +-----------------------------+---------------------------------------------+

If ``directory`` is specified, but ``output-file`` is not, the default filename
of the output file will be::

<directory>/<locale>/LC_MESSAGES/<domain>.mo

If neither the ``input_file`` nor the ``locale`` option is set, this command
looks for all catalog files in the base directory that match the given domain,
and compiles each of them to MO files in the same directory.

These options can either be specified on the command-line, or in the
``setup.cfg`` file.

extract_messages
================

The ``extract_messages`` command is comparable to the GNU ``xgettext`` program:
it can extract localizable messages from a variety of difference source files,
and generate a PO (portable object) template file from the collected messages.

If the command has been correctly installed or registered, a project's
``setup.py`` script should allow you to use the command::

$ ./setup.py extract_messages --help
    Global options:
      --verbose (-v)  run verbosely (default)
      --quiet (-q)    run quietly (turns verbosity off)
      --dry-run (-n)  don't actually do anything
      --help (-h)     show detailed help message
    
    Options for 'extract_messages' command:
       ...

Running the command will produce a PO template file::

$ ./setup.py extract_messages --output-file foobar/locale/messages.pot
    running extract_messages
    extracting messages from foobar/__init__.py
    extracting messages from foobar/core.py
    ...
    writing PO template file to foobar/locale/messages.pot

Method Mapping
--------------

The mapping of file patterns to extraction methods (and options) can be
specified using a configuration file that is pointed to using the
``--mapping-file`` option shown above. Alternatively, you can configure the
mapping directly in ``setup.py`` using a keyword argument to the ``setup()``
function:

.. code-block:: python

setup(...
        
        message_extractors = {
            'foobar': [
                ('**.py',                'python', None),
                ('**/templates/**.html', 'genshi', None),
                ('**/templates/**.txt',  'genshi', {
                    'template_class': 'genshi.template:TextTemplate'
                })
            ],
        },
        
        ...
    )

Options
-------

The ``extract_messages`` command accepts the following options:

+-----------------------------+----------------------------------------------+
  | Option                      | Description                                  |
  +=============================+==============================================+
  | ``--charset``               | charset to use in the output file            |
  +-----------------------------+----------------------------------------------+
  | ``--keywords`` (``-k``)     | space-separated list of keywords to look for |
  |                             | in addition to the defaults                  |
  +-----------------------------+----------------------------------------------+
  | ``--no-default-keywords``   | do not include the default keywords          |
  +-----------------------------+----------------------------------------------+
  | ``--mapping-file`` (``-F``) | path to the mapping configuration file       |
  +-----------------------------+----------------------------------------------+
  | ``--no-location``           | do not include location comments with        |
  |                             | filename and line number                     |
  +-----------------------------+----------------------------------------------+
  | ``--omit-header``           | do not include msgid "" entry in header      |
  +-----------------------------+----------------------------------------------+
  | ``--output-file`` (``-o``)  | name of the output file                      |
  +-----------------------------+----------------------------------------------+
  | ``--width`` (``-w``)        | set output line width (default 76)           |
  +-----------------------------+----------------------------------------------+
  | ``--no-wrap``               | do not break long message lines, longer than |
  |                             | the output line width, into several lines    |
  +-----------------------------+----------------------------------------------+
  | ``--input-dirs``            | directories that should be scanned for       |
  |                             | messages                                     |
  +-----------------------------+----------------------------------------------+
  | ``--sort-output``           | generate sorted output (default False)       |
  +-----------------------------+----------------------------------------------+
  | ``--sort-by-file``          | sort output by file location (default False) |
  +-----------------------------+----------------------------------------------+
  | ``--msgid-bugs-address``    | set email address for message bug reports    |
  +-----------------------------+----------------------------------------------+
  | ``--copyright-holder``      | set copyright holder in output               |
  +-----------------------------+----------------------------------------------+
  | ``--add-comments (-c)``     | place comment block with TAG (or those       |
  |                             | preceding keyword lines) in output file.     |
  |                             | Separate multiple TAGs with commas(,)        |
  +-----------------------------+----------------------------------------------+

These options can either be specified on the command-line, or in the
``setup.cfg`` file. In the latter case, the options above become entries of the
section ``[extract_messages]``, and the option names are changed to use
underscore characters instead of dashes, for example:

.. code-block:: ini

[extract_messages]
    keywords = _, gettext, ngettext
    mapping_file = babel.cfg
    width = 80

This would be equivalent to invoking the command from the command-line as
follows::

$ setup.py extract_messages -k _ -k gettext -k ngettext -F mapping.cfg -w 80

Any path names are interpreted relative to the location of the ``setup.py``
file. For boolean options, use "true" or "false" values.

init_catalog
============

The ``init_catalog`` command is basically equivalent to the GNU ``msginit``
program: it creates a new translation catalog based on a PO template file (POT).

If the command has been correctly installed or registered, a project's
``setup.py`` script should allow you to use the command::

$ ./setup.py init_catalog --help
    Global options:
      --verbose (-v)  run verbosely (default)
      --quiet (-q)    run quietly (turns verbosity off)
      --dry-run (-n)  don't actually do anything
      --help (-h)     show detailed help message

Options for 'init_catalog' command:
      ...

Running the command will produce a PO file::

$ ./setup.py init_catalog -l fr -i foobar/locales/messages.pot \
                             -o foobar/locales/fr/messages.po
    running init_catalog
    creating catalog 'foobar/locales/fr/messages.po' based on 'foobar/locales/messages.pot'

Options
-------

The ``init_catalog`` command accepts the following options:

+-----------------------------+---------------------------------------------+
  | Option                      | Description                                 |
  +=============================+=============================================+
  | ``--domain``                | domain of the PO file (defaults to          |
  |                             | lower-cased project name)                   |
  +-----------------------------+---------------------------------------------+
  | ``--input-file`` (``-i``)   | name of the input file                      |
  +-----------------------------+---------------------------------------------+
  | ``--output-dir`` (``-d``)   | name of the output directory                |
  +-----------------------------+---------------------------------------------+
  | ``--output-file`` (``-o``)  | name of the output file                     |
  +-----------------------------+---------------------------------------------+
  | ``--locale``                | locale for the new localized string         |
  +-----------------------------+---------------------------------------------+

If ``output-dir`` is specified, but ``output-file`` is not, the default filename
of the output file will be::

<output_dir>/<locale>/LC_MESSAGES/<domain>.po

These options can either be specified on the command-line, or in the
``setup.cfg`` file.

update_catalog
==============

The ``update_catalog`` command is basically equivalent to the GNU ``msgmerge``
program: it updates an existing translations catalog based on a PO template
file (POT).

If the command has been correctly installed or registered, a project's
``setup.py`` script should allow you to use the command::

$ ./setup.py update_catalog --help
    Global options:
      --verbose (-v)  run verbosely (default)
      --quiet (-q)    run quietly (turns verbosity off)
      --dry-run (-n)  don't actually do anything
      --help (-h)     show detailed help message

Options for 'update_catalog' command:
      ...

Running the command will update a PO file::

$ ./setup.py update_catalog -l fr -i foobar/locales/messages.pot \
                                -o foobar/locales/fr/messages.po
    running update_catalog
    updating catalog 'foobar/locales/fr/messages.po' based on 'foobar/locales/messages.pot'

Options
-------

The ``update_catalog`` command accepts the following options:

If ``output-dir`` is specified, but ``output-file`` is not, the default filename
of the output file will be::

<output_dir>/<locale>/LC_MESSAGES/<domain>.po

If neither the ``input_file`` nor the ``locale`` option is set, this command
looks for all catalog files in the base directory that match the given domain,
and updates each of them.

These options can either be specified on the command-line, or in the
``setup.cfg`` file.

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	0755	2018-08-08 09:39:02
..	dir	-	root/root	0755	2018-08-08 09:39:02
api	dir	-	root/root	0755	2018-08-08 09:39:02
common	dir	-	root/root	0755	2018-08-08 09:39:02
cmdline.html	text/html	8.19 KB	root/root	0644	2011-03-17 02:11:27
cmdline.txt	text/x-c++	6.57 KB	root/root	0644	2011-03-17 02:03:05
dates.html	text/html	16.4 KB	root/root	0644	2011-03-17 02:11:28
dates.txt	text/plain	13.66 KB	root/root	0644	2011-03-17 02:03:05
display.html	text/html	4.33 KB	root/root	0644	2011-03-17 02:11:28
display.txt	text/plain	2.36 KB	root/root	0644	2011-03-17 02:03:05
index.html	text/html	1.88 KB	root/root	0644	2011-03-17 02:11:27
index.txt	text/plain	882 B	root/root	0644	2011-03-17 02:03:05
intro.html	text/html	3.81 KB	root/root	0644	2011-03-17 02:11:27
intro.txt	text/plain	2.44 KB	root/root	0644	2011-03-17 02:03:05
logo.pdf	application/pdf	43.93 KB	root/root	0644	2011-03-17 02:03:05
logo.png	image/png	15.12 KB	root/root	0644	2011-03-17 02:03:05
logo_small.png	image/png	5.97 KB	root/root	0644	2011-03-17 02:03:05
messages.html	text/html	17.44 KB	root/root	0644	2011-03-17 02:11:28
messages.txt	text/plain	11.7 KB	root/root	0644	2011-03-17 02:03:05
numbers.html	text/html	6.05 KB	root/root	0644	2011-03-17 02:11:27
numbers.txt	text/plain	4.66 KB	root/root	0644	2011-03-17 02:03:05
setup.html	text/html	18.86 KB	root/root	0644	2011-03-17 02:11:27
setup.txt	text/plain	14.84 KB	root/root	0644	2011-03-17 02:03:05
support.html	text/html	3.17 KB	root/root	0644	2011-03-17 02:11:27
support.txt	text/x-c++	1.73 KB	root/root	0644	2011-03-17 02:03:05

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