slap-cli 1.4.3

Slap is a command-line utility for developing Python applications.

Slap

It slaps.

Slap is an extensible command-line tool to assist in the development of Python projects independent of the PEP 517 build backend being used, capable of managing single- and multi-project repositories.

Installation

I recommend installing Slap using Pipx. (Requires Python 3.10 or higher)

$ pipx install slap-cli

Note: Currently Slap relies on an alpha version of poetry-core (^1.1.0a6). If you install it into the same environment as Poetry itself, you may also need to use an alpha version of Poetry (e.g. 1.2.0a2).

If you use Slap in GitHub Actions, try one of the actions provided by Slap directly:

• NiklasRosenstein/slap@gha/install/v1
• NiklasRosenstein/slap@gha/changelog/update/v1

Documentation

You can find the documentation for Slap here: https://niklasrosenstein.github.io/slap/

Check out the Getting started guide.

Feature Matrix

Feature	Documentation
Manage structured changelog entries	slap changelog
Show project details	slap info
Build and publish to PyPI using Twine	slap publish
Create a new release (bump version numbersr)	slap release
Run a command configured in pyproject.toml	slap run
Run tests configured in pyproject.toml	slap test
Manage Python virtualenv's	slap venv

Feature / Build backend	Flit	Poetry	Setuptools	Documentation
Add dependency	✅	✅	❌	slap add
Sanity check project configuration		✅		slap check
Bootstrap project files		✅		slap init
Install projects using Pip	✅	✅	✅	slap install
Symlink projects (editable installs)	✅	✅ 1	✅	slap link
Bump interdependencies in mono-repository	✅ (not tested regularly)	✅	✅ (partial)	slap release

Legend: ✅ explicitly supported, ❌ explicitly not supported, (blank) not relevant or currently not supported

¹ Poetry supports the configuration of multiple packages per project, but Slap currently does not support linking more than one package. This does not impact the ability to symlink all projects in a mono-repository, which functions as expected.

Issues / Suggestions / Contributions

Slap is currently very opinionated by the fact that I built it as my personal workflow tool, but I welcome suggestions and contributions, and I am hopeful it will be useful to a wider audience than myself.

Please report any issues you encounter via GitHub Issues. Feel free to use the GitHub Discussions forum to ask questions or make suggestions on new features (e.g. if you would like a new build backend to be supported?). Lastly, feel free to submit pull requests to the GitHub Repository.

FAQ

Why "Slap"?

Finding a good, catchy name that also types easily in the terminal and is not already widely used isn't easy, ok?

What makes this different to the Poetry CLI?

Some people might find this similar to tools like Poetry, and while there is some overlap in functionality, Slap is not a build backend and is more targeted towards library development. In fact, most of my projects use Poetry as the build backend but I never even once interact with the Poetry CLI throughout the lifetime of the project.

The most notable differences to Poetry are

• Supports mono-repositories (i.e. multiple related Python projects in the same repository), to the extent that it bumps version numbers of project inter-dependencies and installs your projects in topological order
• Supports development installs independent of the build backend (yes; this means you can install Poetry packages in editable mode even though the Poetry backend right now does not support editable installs)
• Slap's version bump command (slap release) updates the version not just in your pyproject.toml but also the __version__ in your source code as well as in related projects (see mono-repositories above) and any additional references you can configure via Regex patterns
• Does not automagically create a virtual environment for you when instal your project(s); instead, it errors when you try to install into a non-virtual Python environment and gives you an easy-to-use tool to create and activate virtual environments (and allowing multiple environments per project as well as global environments)
• Uses Pip to install your project(s), unlike Poetry which comes with its own dependency resolver and package installer (which I personally have been having a lot of issues with in the past).
• Does not have a concept of lock files