just-buildit 0.1.3

The missing PEP 517 build backend for C extensions.

The missing PEP 517 build backend for C extensions.

You know how to build your project. just-build knows how to package it. That's the whole deal.

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The problem

Every existing Python build backend either wants to own your build system, assumes you're using setuptools extensions, or drags in a dependency tree bigger than your project. There's no option that just says:

"Here are your C files. Build them however you want. I'll ship the result."

just-build is that option.

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Quickstart

Got a single C extension in src/mylib/? No configuration needed:

[build-system]
requires = ["just-buildit"]
build-backend = "just_build"

[project]
name = "mylib"
version = "0.1.0"

Run pip install . and just-build finds src/mylib/, compiles every .c file it contains, and ships the result.

For anything more complex, point it at your build command:

[tool.just-build]
command = "make"

just-build sets environment variables, calls your command, packages everything written to $JUST_BUILD_OUTPUT_DIR, and ships the result.

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Documentation

Environment variables	What just-build sets before calling your command
Examples	Makefile, CMake, Meson, mixed Python + C
Configuration	Full config reference, wheel repair, editable installs
Contributing	Running tests, platform support, bootstrapping

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Requirements

• Python 3.11+
• A compiler (you already have one)
• uv for wheel repair (uvx auditwheel / uvx delocate-wheel / uvx delvewheel)

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License

MIT