The hooks API had several issues which are summarized in this comment:
https://github.com/openedx/wg-developer-experience/issues/125#issuecomment-1313553526
1. "consts" was a bad name
2. "hooks.filters" and "hooks.Filters" could easily be confused
3. docs made it difficult to understand that plugin developers should use the catalog
To address these issues, we:
1. move "consts.py" to "catalog.py"
2. Remove "hooks.actions", "hooks.filters", "hooks.contexts" from the API.
3. re-organize the docs and give better usage examples in the catalog.
This change is a partial fix for https://github.com/openedx/wg-developer-experience/issues/125
Adds `from __future__ import annotations` to the top of every module,
right below the module's docstring. Replaces any usages of t.List,
t.Dict, t.Set, t.Tuple, and t.Type with their built-in equivalents:
list, dict, set, tuple, and type. Ensures that make test still passes
under Python 3.7, 3.8 and 3.9.
I stumbled upon a bug that should have been detected by the type
checking. Turns out, considering that config is of type Dict[str, Any]
means that we can use just any method on all config values -- which is
terrible. I discovered this after I set `config["PLUGINS"] = None`:
this triggered a crash when I enabled a plugin.
We resolve this by making the Config type more explicit. We also take
the opportunity to remove a few cast statements.
Annotations were generated with pyannotate:
https://github.com/dropbox/pyannotate
We are running in strict mode, which is awesome!
This affects a large part of the code base, which might be an issue for
people running a fork of Tutor. Nonetheless, the behavior should not be
affected. If anything, this process has helped find and resolve a few
type-related bugs. Thus, this is not considered as a breaking change.
Running jobs was previously done with "exec". This was because it
allowed us to avoid copying too much container specification information
from the docker-compose/deployments files to the jobs files. However,
this was limiting:
- In order to run a job, the corresponding container had to be running.
This was particularly painful in Kubernetes, where containers are
crashing as long as migrations are not correctly run.
- Containers in which we need to run jobs needed to be present in the
docker-compose/deployments files. This is unnecessary, for example when
mysql is disabled, or in the case of the certbot container.
Now, we create dedicated jobs files, both for local and k8s deployment.
This introduces a little redundancy, but not too much. Note that
dependent containers are not listed in the docker-compose.jobs.yml file,
so an actual platform is still supposed to be running when we launch the
jobs.
This also introduces a subtle change: now, jobs go through the container
entrypoint prior to running. This is probably a good thing, as it will
avoid forgetting about incorrect environment variables.
In k8s, we find ourselves interacting way too much with the kubectl
utility. Parsing output from the CLI is a pain. So we need to switch to
the native kubernetes client library.
We were getting the following warning with the latest version of pyyaml:
YAMLLoadWarning: calling yaml.load() without Loader=... is
deprecated, as the default Loader is unsafe. Please read
https://msg.pyyaml.org/load for full details.
Régis Behmo
Carlos Muniz
Eric Herrera