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simplify configuration via environment

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This commit is contained in:
Valentin Gagarin 2025-03-19 10:06:38 +01:00
parent c5fe0157b0
commit afbbcbc22d
2 changed files with 21 additions and 16 deletions
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7
panel/default.nix
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@ -23,14 +23,15 @@ in
NPINS_DIRECTORY = toString ../npins;
# explicitly use nix, as e.g. lix does not have configurable-impure-env
NIX_DIR = pkgs.nix;
REPO_DIR = toString ../.;
CREDENTIALS_DIRECTORY = builtins.toString ./.credentials;
DATABASE_URL = "sqlite:///${toString ./src}/db.sqlite3";
};
shellHook = ''
# in production, secrets are passed via CREDENTIALS_DIRECTORY by systemd.
# use this directory for testing with local secrets
mkdir -p .credentials
mkdir -p $CREDENTIALS_DIRECTORY
echo secret > ${builtins.toString ./.credentials}/SECRET_KEY
export CREDENTIALS_DIRECTORY=${builtins.toString ./.credentials}
export DATABASE_URL="sqlite:///${toString ./src}/db.sqlite3"
'';
};

30
panel/src/panel/settings.py
View file

@ -173,22 +173,26 @@ DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
# Customization via user settings
# This must be at the end, as it must be able to override the above
# TODO: we may want to do this with a flat environment instead, and get all values from `os.environ.get()`.
# this would make it more obvious which moving parts there are, if that environment is specified for development/staging/production in a visible place.
user_settings_file = env.get("USER_SETTINGS_FILE", None)
if user_settings_file is not None:
spec = importlib.util.spec_from_file_location("user_settings", user_settings_file)
if spec is None or spec.loader is None:
raise RuntimeError("User settings specification failed!")
module = importlib.util.module_from_spec(spec)
spec.loader.exec_module(module)
sys.modules["user_settings"] = module
from user_settings import * # noqa: F403 # pyright: ignore [reportMissingImports]
# TODO(@fricklerhandwerk):
# we may want to do this with a flat environment instead, and get all values from `os.environ.get()`.
# this would make it more obvious which moving parts there are, if that environment is specified for development/staging/production in a visible place.
user_settings_file = env["USER_SETTINGS_FILE"]
spec = importlib.util.spec_from_file_location("user_settings", user_settings_file)
if spec is None or spec.loader is None:
raise RuntimeError("User settings specification failed!")
module = importlib.util.module_from_spec(spec)
spec.loader.exec_module(module)
sys.modules["user_settings"] = module
from user_settings import * # noqa: F403 # pyright: ignore [reportMissingImports]
# non-Django application settings
# TODO(@fricklerhandwerk):
# The correct thing to do here would be using a helper function such as with `get_secret()` that will catch the exception and explain what's wrong and where to put the right values.
# Replacing the `USER_SETTINGS_FILE` mechanism following the comment there would probably be a good thing.
# a dir of nix supporting experimental feature `configurable-impure-env`.
nix_bin_dir=f"{env.get("NIX_DIR")}/bin/"
nix_bin_dir=f"{env['NIX_DIR']}/bin/"
# path of the root flake to trigger nixops from, see #94.
# to deploy this should be specified, for dev just use a relative path.
repo_dir = env.get("REPO_DIR") or f"{os.getcwd()}/.."
repo_dir = env["REPO_DIR"]