this concludes Fediversity/Fediversity#72 with a test covering most of the user story.
test in the devshell:
```
manage test panel
```
test in full isolation:
```
nix-build -A tests
```
Reviewed-on: Fediversity/Fediversity#163
Reviewed-by: kiara Grouwstra <kiara@procolix.eu>
This introduces customisation to `settings.py` that
- allow controlling the relevant parameters from our systemd wrapper
(more brittle and non-obvious than it should be, see TODOs)
- correctly configure SASS processing and static file compression
(not as easy as it sounds)
This setup is greatly inspired by the one used for [0], although with
notable modifications, such as:
- a SASS preprocessor and CSS compressor
- more streamlined NixOS integration tests
- cleaned up service configuration
- a few notes on how to do things better in the future
[0]: https://github.com/Nix-Security-WG/nix-security-tracker/
Apart from cloning the Nix setup, there were additional steps:
- Create an empty `src` directory, since the package requires it
- In the development shell, run `django-admin startproject panel src`
Note that while you can already do
```bash
manage migrate
manage runserver
```
the NixOS integration tests will fail, since `settings.py` needs
careful massaging to expose knobs that can be turned from our systemd
wrapper. The required changes are introduced in the next commit to make
them observable.
Noteworthy related work:
- https://github.com/sephii/django.nix
Rather mature setup with a clean interface, uses Caddy as reverse proxy.
- https://git.dgnum.eu/mdebray/djangonix
A work-in-progress attempt to capture more moving parts through the
module system, in particular secrets.
- https://github.com/DavHau/django-nixos
Out of date and somewhat simplistic, but serves as a reasonable
example for what can be done
I chose the variant I'm intimately familiar with in order to be able to
pass on knowledge or help with maintenance. But for the future
I strongly recommend picking the good bits from the other
implementations that control complexity in static configuration parts
through Nix expressions.
