Hydrilla (Python implementation)

This is the repository of Python incarnation of Hydrilla, a repository software to serve Haketilo packages.

The information below is meant to help hack on the codebase. If you're instead looking for some noob-friendly documentation, see the user manual.




  • build (a PEP517 package builder)
  • setuptools
  • wheel
  • setuptools_scm
  • babel (Python library)


  • pytest


We're using setuptools. You can build a wheel under dist/ with

python3 -m build

Optionally, add a --no-isolation option to the second command to have it use system packages where possible instead of downloading all dependencies from PyPI.

The generated .whl file can then be used to install Hydrilla either globally or in the current Python virtualenv:

python3 -m pip install dist/put_the_name_of_generated_file_here.whl

PyPI considerations

Commands like python3 -m build and python3 -m pip but also virtualenv will by default download the dependencies from PyPI repository^pypi. Although this is what many people want, it carries along a freedom issue. PyPI is not committed to only hosting libre software packages^pypi_freeware and, like any platform allowing upload of code by the public, has lower package standards than repositories of many operating system distributions. For this reason you are encouraged to use the dependencies as provided by your distribution.

To perform the build and installation without PyPI, first install all dependencies system-wide. For example, in Debian-based distributions (including Trisquel):

sudo apt install python3-flask python3-flask python3-jsonschema \
     python3-setuptools python3-setuptools-scm python3-babel python3-wheel \

If you're using virtualenv command to create a virtual environment, make sure you invoke it with --system-site-packages and --no-download. The first option is necessary for packages installed inside the virtualenv to be able to use globally-installed dependencies. The second one will make virtualenv use locally-available base libraries (setuptools, etc.) instead of downloading them from PyPI.

Now, in unpacked source directories of both hydrilla-builder and hydrilla, run the build and installation commands:

python3 -m build --no-isolation
python3 -m pip install dist/hydrilla*.whl # or use the full file name


For tests to pass you need compiled message catalogs to be present. If you've performed the build at least once, they're already there. Otherwise, you need to run ./setup.py compile_catalog. Then you can run the actual tests:

python3 -m pytest

Installation from wheels

Instead of building yourself you can use Python wheels provided on Hydrilla downloads page.

python3 -m pip install \
    path/to/downloaded/hydrilla.builder-1.1b1-py3-none-any.whl \


Hydrilla command

Hydrilla includes a hydrilla shell command that can be used to quickly and easily spawn a local instance, e.g.:

hydrilla -m /path/to/where/package/files/to/serve/are/stored -p 10112

This will cause the resources from provided path to be served at

The actual packages to serve are made using Hydrilla builder.

For more information about available options, pass the --help flag to hydrilla command:

hydrilla --help

If you navigate your POSIX shell to Hydrilla sources directory, you can also consult the included manpage (man tool required):

man ./doc/man/man1/hydrilla.1

Last but not least, you might find it useful to consult the default, internal configuration file of Hydrilla that resides under src/hydrilla/server/config.json in the sources repository.


If you want to test a more production-suitable deployment option, consult sample Apache2 config files and a WSGI script supplied in doc/examples directory.


Hydrilla is Copyright (C) 2021-2022 Wojtek Kosior and contributors, entirely available under the GNU Affero General Public License version 3 or later. Some files might also give you broader permissions, see comments inside them.

I, Wojtek Kosior, thereby promise not to sue for violation of this project's license. Although I request that you do not make use this code in a proprietary program, I am not going to enforce this in court.


Please visit our Redmine instance at https://hydrillabugs.koszko.org.

You can also write an email to koszko@koszko.org.