82 lines
2.9 KiB
ReStructuredText
82 lines
2.9 KiB
ReStructuredText
How to develop a source plugin for nvchecker
|
|
============================================
|
|
|
|
.. contents::
|
|
:local:
|
|
|
|
Source plugins enable nvchecker to discover software version strings in
|
|
additional ways.
|
|
|
|
Where to put the plugins
|
|
------------------------
|
|
|
|
They are Python modules put in any directories named ``nvchecker_source`` in
|
|
``sys.path``. This is called namespace packages introduced by `PEP 420 <https:
|
|
//www.python.org/dev/peps/pep-0420/>`_. For local use,
|
|
``~/.local/lib/pythonX.Y/site-packages/nvchecker_source`` is a good place, or
|
|
you can define the ``PYTHONPATH`` environment variable and put nvchecker source
|
|
plugins there inside a ``nvchecker_source`` directory.
|
|
|
|
Plugins are referenced by their names in the configuration file (``source = "xxx"``).
|
|
If multiple plugins have the same name, the first one in ``sys.path`` will be used.
|
|
|
|
How to write a simple plugin
|
|
----------------------------
|
|
|
|
For simple situations, you need to define an async function with the following signature::
|
|
|
|
async def get_version(
|
|
name: str, conf: Entry, *,
|
|
cache: AsyncCache, keymanager: KeyManager,
|
|
**kwargs,
|
|
) -> VersionResult:
|
|
...
|
|
|
|
Those types are imported from :mod:`nvchecker.api`.
|
|
|
|
``name`` is the table keys in the configuration file, and ``conf`` is a dict of
|
|
the content of that table. You should not modify this dict.
|
|
|
|
``cache`` is an :class:`AsyncCache <nvchecker.api.AsyncCache>` object that
|
|
caches results for you. Every plugin has its own ``cache`` object so that cache
|
|
keys won't conflict.
|
|
|
|
``keymanager`` is a :class:`KeyManager <nvchecker.api.KeyManager>` object that
|
|
you can call :meth:`.get_key(name) <nvchecker.api.KeyManager.get_key>` to get
|
|
the key (token) from the keyfile.
|
|
|
|
There may be additional keyword arguments in the future so ``**kwargs`` should be used.
|
|
|
|
If you want to send an HTTP request, it's preferred to use :meth:
|
|
`cache.get_json <nvchecker.api.AsyncCache.get_json>` or the :data:
|
|
`nvchecker.api.session` object. It will use the auto-selected HTTP backend and
|
|
handle the ``proxy`` option automatically.
|
|
|
|
For details about these objects, see :mod:`the API documentation <nvchecker.api>
|
|
`, or take existing source plugins as examples.
|
|
|
|
How to write a more powerful plugin
|
|
-----------------------------------
|
|
|
|
You may want more control in your source plugin, e.g. to do batch requests. To
|
|
do this, you provide a class instead::
|
|
|
|
class Worker(BaseWorker):
|
|
async def run(self) -> None:
|
|
...
|
|
|
|
|
|
You will have the following in the attributes::
|
|
|
|
token_q: Queue[bool],
|
|
result_q: Queue[RawResult],
|
|
tasks: List[Tuple[str, Entry]],
|
|
keymanager: KeyManager,
|
|
|
|
You are expected to process :attr:`tasks <nvchecker.api.BaseWorker.tasks>` and
|
|
put results in :attr:`result_q <nvchecker.api.BaseWorker.result_q>`. See
|
|
``nvchecker_source/none.py`` for the simplest example, and
|
|
``nvchecker_source/aur.py`` for a complete, batching example.
|
|
|
|
For details about these objects, see :mod:`the API documentation <nvchecker.api>`.
|