Customizing Weblate#

Extend and customize using Django and Python. Contribute your changes upstream so that everybody can benefit. This reduces your maintenance costs; code in Weblate is taken care of when changing internal interfaces or refactoring the code.

Warning

Neither internal interfaces nor templates are considered a stable API. Please review your own customizations for every upgrade, the interfaces or their semantics might change without notice.

Creating a Python module#

If you are not familiar with Python, you might want to look into Python For Beginners, explaining the basics and pointing to further tutorials.

To write a file with custom Python code (called a module), a place to store it is needed, either in the system path (usually something like /usr/lib/python3.9/site-packages/) or in the Weblate directory, which is also added to the interpreter search path.

Hint

When using Docker, you can place Python modules in /app/data/python/ (see Docker container volumes), so they can be loaded by Weblate, for example from a settings override file.

Better yet, turn your customization into a proper Python package:

Create a folder for your package (we will use weblate_customization).

Within it, create a setup.py file to describe the package:

from setuptools import setup

setup(
    name="weblate_customization",
    version="0.0.1",
    author="Your name",
    author_email="yourname@example.com",
    description="Sample Custom check for Weblate.",
    license="GPLv3+",
    keywords="Weblate check example",
    packages=["weblate_customization"],
)

Create a folder for the Python module (also called weblate_customization) for the customization code.
Within it, create a __init__.py file to make sure Python can import the module.
This package can now be installed using pip install -e. More info to be found in Editable installs.
Once installed, the module can be used in the Weblate configuration (for example weblate_customization.checks.FooCheck).

Your package structure should look like this:

weblate_customization
├── setup.py
└── weblate_customization
    ├── __init__.py
    ├── addons.py
    └── checks.py

You can find an example of customizing Weblate at <https://github.com/WeblateOrg/customize-example>, it covers all the topics described below.

Changing the logo#

Create a simple Django app containing the static files you want to overwrite (see Creating a Python module).

Branding appears in the following files:

icons/weblate.svg
Logo shown in the navigation bar.

logo-*.png
Web icons depending on screen resolution and web-browser.

favicon.ico
Web icon used by legacy browsers.

weblate-*.png
Avatars for bots or anonymous users. Some web-browsers use these as shortcut icons.

email-logo.png
Used in notifications e-mails.

Add it to INSTALLED_APPS:

INSTALLED_APPS = (
    # Add your customization as first
    "weblate_customization",
    # Weblate apps are here…
)

Run weblate collectstatic --noinput, to collect static files served to clients.

Custom quality checks, add-ons and auto-fixes#

To install your code for Custom automatic fixups, Writing own checks or Writing add-on in Weblate:

Place the files into your Python module containing the Weblate customization (see Creating a Python module).
Add its fully-qualified path to the Python class in the dedicated settings (WEBLATE_ADDONS, CHECK_LIST or AUTOFIX_LIST):

# Checks
CHECK_LIST += ("weblate_customization.checks.FooCheck",)

# Autofixes
AUTOFIX_LIST += ("weblate_customization.autofix.FooFixer",)

# Add-ons
WEBLATE_ADDONS += ("weblate_customization.addons.ExamplePreAddon",)