Basic env and description

This commit is contained in:
Arkadiusz Jedrzejewski 2026-03-15 17:21:35 +01:00
parent b5261ba0f6
commit 246ef4c829
9 changed files with 237 additions and 163 deletions

12
.envrc Normal file
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#!/usr/bin/env bash
export DIRENV_WARN_TIMEOUT=20s
eval "$(devenv direnvrc)"
# `use devenv` supports the same options as the `devenv shell` command.
#
# To silence all output, use `--quiet`.
#
# Example usage: use devenv --quiet --impure --option services.postgres.enable:bool true
use devenv

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.gitignore vendored
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# ---> Python
# Byte-compiled / optimized / DLL files
.devenv*
devenv.lock
.direnv*
uv.lock
__pycache__/
*.py[cod]
*$py.class
# C extensions
*.so
# Distribution / packaging
.Python
build/
develop-eggs/
dist/
downloads/
eggs/
.eggs/
lib/
lib64/
parts/
sdist/
var/
wheels/
share/python-wheels/
*.egg-info/
.installed.cfg
*.egg
MANIFEST
# PyInstaller
# Usually these files are written by a python script from a template
# before PyInstaller builds the exe, so as to inject date/other infos into it.
*.manifest
*.spec
# Installer logs
pip-log.txt
pip-delete-this-directory.txt
# Unit test / coverage reports
htmlcov/
.tox/
.nox/
.coverage
.coverage.*
.cache
nosetests.xml
coverage.xml
*.cover
*.py,cover
.hypothesis/
.pytest_cache/
cover/
# Translations
*.mo
*.pot
# Django stuff:
*.log
local_settings.py
db.sqlite3
db.sqlite3-journal
# Flask stuff:
instance/
.webassets-cache
# Scrapy stuff:
.scrapy
# Sphinx documentation
docs/_build/
# PyBuilder
.pybuilder/
target/
# Jupyter Notebook
.ipynb_checkpoints
# IPython
profile_default/
ipython_config.py
# pyenv
# For a library or package, you might want to ignore these files since the code is
# intended to run in multiple environments; otherwise, check them in:
# .python-version
# pipenv
# According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
# However, in case of collaboration, if having platform-specific dependencies or dependencies
# having no cross-platform support, pipenv may install dependencies that don't work, or not
# install all needed dependencies.
#Pipfile.lock
# poetry
# Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
# This is especially recommended for binary packages to ensure reproducibility, and is more
# commonly ignored for libraries.
# https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
#poetry.lock
# pdm
# Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
#pdm.lock
# pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
# in version control.
# https://pdm.fming.dev/latest/usage/project/#working-with-version-control
.pdm.toml
.pdm-python
.pdm-build/
# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
__pypackages__/
# Celery stuff
celerybeat-schedule
celerybeat.pid
# SageMath parsed files
*.sage.py
# Environments
.env
.venv
env/
venv/
ENV/
env.bak/
venv.bak/
# Spyder project settings
.spyderproject
.spyproject
# Rope project settings
.ropeproject
# mkdocs documentation
/site
# mypy
.mypy_cache/
.dmypy.json
dmypy.json
# Pyre type checker
.pyre/
# pytype static type analyzer
.pytype/
# Cython debug symbols
cython_debug/
# PyCharm
# JetBrains specific template is maintained in a separate JetBrains.gitignore that can
# be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
# and can be added to the global gitignore or merged into this file. For a more nuclear
# option (not recommended) you can uncomment the following to ignore the entire idea folder.
#.idea/

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.pre-commit-config.yaml Normal file
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default_stages: [pre-commit, pre-push]
repos:
- repo: local
hooks:
- id: trailing-whitespace
name: Trim trailing space
entry: trailing-whitespace-fixer
language: system
types: [file, text]
- id: end-of-file-fixer
name: Fix end of files
description: Ensures that a file is either empty, or ends with one newline.
entry: end-of-file-fixer
language: system
types: [file, text]
- id: check-merge-conflict
name: Check for merge conflicts
description: Check for files that contain merge conflict strings.
entry: check-merge-conflict
language: system
types: [file, text]
- id: ruff-format
name: Ruff format
description: Format.
entry: ruff format --check --config pyproject.toml
language: system
types: [python]
- id: ruff-lint
name: Ruff linter
description: Lint.
entry: ruff check --force-exclude --config pyproject.toml
language: system
types: [python]

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# kronos
Share events between services.
## Setup
Nix is required.
- Set up environment.
```bash
direnv allow
```
- Set up pre-commit hooks.
```bash
pre-commit install
```
- Install as editable package.
```bash
pip install -e .
```
## Run
Once installed, run:
```bash
kronos
```
TODO: add parameters.
TODO: add info on how to run as a Podman service.
## High level design
`kronos` is an application able to sync events from a single source of truth to multiple consumer services.
E.g., an event defined by Mobilizon is modified -> Discord, Meetup, any other, are updated.
It is deployed as a Docker container, running as a service.
Persistent storage is required for SQLite database.
Secrets management is used to handle credentials.
`systemd` timer is configured to trigger the app.
E.g., `kronos` is being run every three hours to perform events update.
Each app run performs the following:
- Request event data from source of truth service (e.g., Mobilizon).
- Compare event data between received and stored in the database.
- Update if new data available (last change date is later than known).
- Stop execution otherwise.
- Send updates event data to consumers.
```plain
┌───────────────────────────────────────────────────────────────────────────────────────────────┐
│ │
│ CONTAINER │
│ │
│ ┌───────────────┐ ┌────────┐ │
│ │ │ │ │ │
│ │ systemd timer │ │ volume │ │
│ │ │ │ │ │
│ └───────┬───────┘ └────┬───┘ │
│ │ │ │
│ ┌────────────────────┴────────────────────────────┼─────────────────────────────────────────┐ │
│ │ │ │ │
│ │ APP │ │ │
│ │ ┌───────────────┐ ┌────┴─────┐ ┌────────────────┐ │ │
│ │ trigger │ │ event data │ │ event data │ │ │ │
│ │ ──────────►│ data provider ├──────────────►│ database ├───────────────►│ data consumers │ │ │
│ │ │ │ │ │ │ │ │ │
│ │ └───────────────┘ └──────────┘ └────────────────┘ │ │
│ │ │ │
│ └───────────────────────────────────────────────────────────────────────────────────────────┘ │
│ │
└───────────────────────────────────────────────────────────────────────────────────────────────┘
```

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devenv.nix Normal file
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{
name = "kronos";
languages.python = {
enable = true;
venv.enable = true;
version = "3.13.0";
uv = {
enable = true;
sync.enable = true;
sync.allExtras = true;
};
};
}

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devenv.yaml Normal file
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inputs:
nixpkgs:
url: github:cachix/devenv-nixpkgs/rolling
nixpkgs-python:
url: github:cachix/nixpkgs-python
inputs:
nixpkgs:
follows: nixpkgs

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kronos/__init__.py Normal file
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kronos/main.py Executable file
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from argparse import ArgumentParser
def _main():
parser = ArgumentParser(prog="kronos", description="Share events between services.")
parser.add_argument("--name")
_args = parser.parse_args()
if __name__ == "__main__":
_main()

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pyproject.toml Normal file
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[project]
name = "kronos"
version = "0.1.0"
description = "Share events between services."
authors = [{ name = "Hackerspace Trójmiasto" }]
readme = "README.md"
license = { file = "LICENSE" }
requires-python = ">=3.13"
dependencies = []
[dependency-groups]
dev = ["pre-commit", "pre-commit-hooks", "pytest", "ruff"]
[project.scripts]
kronos = "kronos.main:_main"
[tool.ruff]
exclude = [
".bzr",
".direnv",
".eggs",
".git",
".git-rewrite",
".hg",
".ipynb_checkpoints",
".mypy_cache",
".nox",
".pants.d",
".pyenv",
".pytest_cache",
".pytype",
".ruff_cache",
".svn",
".tox",
".venv",
".vscode",
"__pypackages__",
"_build",
"buck-out",
"build",
"dist",
"node_modules",
"site-packages",
"venv",
]
line-length = 100
indent-width = 4
target-version = "py313"
[tool.ruff.lint]
select = [
# pycodestyle
"E",
"W",
# pyflakes
"F",
# pylint
"PL",
]
ignore = []
fixable = ["ALL"]
unfixable = []
dummy-variable-rgx = "^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$"
[tool.ruff.format]
quote-style = "double"
indent-style = "space"
skip-magic-trailing-comma = false
line-ending = "auto"
docstring-code-format = false
docstring-code-line-length = "dynamic"