A library for making Toolforge tools written in Python translatable.
Project description
Toolforge I18n
A work in progress library for making Wikimedia Toolforge tools written in Python+Flask translatable.
Features
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Make your tool translatable into dozens, potentially hundreds of languages!
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Easy integration with translatewiki.net by reusing MediaWiki message file syntax.
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Full support for the magic words
{{GENDER:}}and{{PLURAL:}}, as well as for hyperlink syntax ([url text]) and list formatting.- Note that there is no support for any other wikitext syntax; formatting in messages (e.g. bold passages) should be written in plain HTML, if it can’t be left out the message entirely (e.g. on a surrounding element in the template).
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By default, support for a MediaWiki-like
?uselang=URL parameter, including?uselang=qqxto see message keys. -
Correct conversion between MediaWiki language codes and HTML language codes / IETF BCP 47 language tags; for instance,
?uselang=simpleproduces<html lang="en-simple">. -
Correct
lang=anddir=in the face of language fallback: messages that (due to language fallback) don’t match the surrounding markup are automatically wrapped in a<span>with the right attributes. (Even MediaWiki doesn’t do this! Though, admittedly, MediaWiki doesn’t have the luxury of assuming that every message can be wrapped in a<span>– many MediaWiki messages are block elements that would rather need a<div>.) -
Includes checks to ensure all translations are safe, without unexpected elements (e.g.
<script>) or attributes (e.g.onclick=), to protect against XSS attacks from translations. The tests are automatically registered via a pytest plugin and also run at tool initialization time.
How to use it
The library is still a work in progress, so preferably don’t use it yet :) but if you’re feeling adventurous, the rough steps should be:
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Add the library to your tool’s dependencies. (As the library is still in its early stages, and there may be breaking changes, I recommend pinning your dependencies using pip-tools or something similar.)
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In your tool’s source code, add a file
tool_translations_config.pywith at least the following contents:from toolforge_i18n import TranslationsConfig config = TranslationsConfig()
Later, you may want to customize parts of the translations config, such as the message
variables; see the class documentation for details. -
Create an
i18n/directory, withen.jsonandqqq.jsonfiles, just like for MediaWiki extensions.en.jsoncontains English messages, whileqqq.jsoncontains message documentation; both contain a JSON object mapping the message key to the text / documentation. -
In your tool’s source code (probably
app.py), add the following import:from toolforge_i18n import ToolforgeI18n, message
And add this line shortly after creating the
app(which usually looks likeapp = flask.Flask(__name__)):i18n = ToolforgeI18n(app)
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Use
message('message-key')for any message that should be translatable, either in a Jinja2 template ({{ message('message-key') }}) or directly in the Python code. For messages with parameters, use kwargs syntax likemessage('message-key', arg1='X', arg2='Y')and define the variable names intool_translations_config(as mentioned above). -
Optionally, set up CI for your tool, and run
pytestin it. This will automatically run tests that ensure the translations are safe. A basic CI setup for tools on Wikimedia GitLab might look like this (.gitlab-ci.yml):stages: - test variables: PYTHONDONTWRITEBYTECODE: "1" PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip" test-job: stage: test image: python:3.11 cache: - key: pip-python-3.11 paths: - .cache/pip script: - python3 -m pip install -r requirements.txt - python3 -m pip install pytest - pytestSee also the
check_translationsflag fortool_translations_config.
License
BSD-3-Clause
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