searxng/searx/babel_extract.py
Markus Heiser b9cf3c82a1 [mod] add i18n infrastructure for SearXNG message files (searxng.msg)
With this patch ``searxng.msg`` files can be added to SearXNG.  In
``searxng.msg`` files messages can be defined which are not captured by babel's
gettext, like the generic names of the categories or messages that are stored in
constants.

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
2022-03-16 09:55:53 +01:00

52 lines
1.4 KiB
Python

# SPDX-License-Identifier: AGPL-3.0-or-later
# lint: pylint
"""This module implements the :origin:`searxng_msg <babel.cfg>` extractor to
extract messages from:
- None
The ``searxng.msg`` files are selected by Babel_, see Babel's configuration in
:origin:`babel.cfg`::
searxng_msg = searx.babel_extract.extract
...
[searxng_msg: **/searxng.msg]
A ``searxng.msg`` file is a python file that is *executed* by the
:py:obj:`extract` function. Additional ``searxng.msg`` files can be added by:
1. Adding a ``searxng.msg`` file in one of the SearXNG python packages and
2. implement a method in :py:obj:`extract` that yields messages from this file.
.. _Babel: https://babel.pocoo.org/en/latest/index.html
"""
from os import path
SEARXNG_MSG_FILE = "searxng.msg"
_MSG_FILES = []
def extract(
# pylint: disable=unused-argument
fileobj,
keywords,
comment_tags,
options,
):
"""Extract messages from ``searxng.msg`` files by a custom extractor_.
.. _extractor:
https://babel.pocoo.org/en/latest/messages.html#writing-extraction-methods
"""
if fileobj.name not in _MSG_FILES:
raise RuntimeError("don't know how to extract messages from %s" % fileobj.name)
namespace = {}
exec(fileobj.read(), {}, namespace) # pylint: disable=exec-used
for name in namespace['__all__']:
for k, v in namespace[name].items():
yield 0, '_', v, ["%s['%s']" % (name, k)]