The Kraken build system

Kraken is a build system, but not in the traditional sense. It's focus is on the orchestration of high-level tasks, such as organization of your repository configuration, code generation, invoking other build systems, etc. It is not a replacement for tools like Poetry, Cargo or CMake.

Requirements

• CPython 3.10+

Getting started

Currently, Kraken's OSS components are not very well documented and do not provide a convenient way to get started. However, if you really want to try it, you can use the following steps:

1. Install kraken-wrapper (e.g. with Pipx) to get access to the krakenw command-line tool.

2. Create a .kraken.py script in your project's root directory.

   from kraken.common import buildscript
   buildscript(requirements=["kraken-build==0.32.3"])
   
   from kraken.std.python import mypy, black, isort
   mypy()
   black()
   isort()

3. Run krakenw lock to install kraken-build for your project in build/.kraken/venv and generate a kraken.lock file.

4. Run krakenw run lint to run the linters.

Note that you can also use the kraken CLI (instead of krakenw), however this will disregard the buildscript() function, will not use the lock file and will use the version of Kraken that was installed globally.

How-to's

Upgrade a project's lock file

To upgrade a project's lock file, run krakenw lock --upgrade. This will upgrade all dependencies to the latest available version. If you want to upgrade based on updated constraints in .kraken.py without installing from scratch, add the --incremental flag or set KRAKENW_INCREMENTAL=1.

Development

This repository uses Slap to manage the Python project. After installing Slap with Pipx, run the following to install Kraken for development.

$ slap venv -c --python python3.10
$ slap install --link
# If you have the Slap shell magic installed, it will activate the Venv in your shell.
$ slap venv -a

You may want to use a released version of krakenw to interact in the repository however:

$ krakenw run python.install
$ krakenw run fmt lint test

Releases

A release must be created by a maintainer that has write access to the develop branch. The release process is automated using Slap.

$ slap release -tp <patch|minor|major|x.y.z>
$ slap publish