Python Installers Cloud Native Buildpack

The Paketo Buildpack for Python Installers is a Cloud Native Buildpack that installs python package managers.

The buildpack is published for consumption at gcr.io/paketo-buildpacks/python-package-managers-install and paketobuildpacks/python-package-managers-install.

Behavior

This buildpack participates if one of the following detection succeeds:

• miniconda -> Always
• pip -> Always
• pipenv -> Always
• poetry -> pyproject.toml is present in the root folder
• uv -> uv.lock is present in the root folder
• pixi -> pixi.lock is present in the root folder

The buildpack will do the following:

• At build time:
  • Installs the package manager
  • Makes it available on the PATH
  • Adjusts PYTHONPATH as required
• At run time:
  • Does nothing

Configuration

BP_ENABLE_PACKAGE_MANAGERS

The BP_ENABLE_PACKAGE_MANAGERS environment variable allows you to force the use of this buildpack for all the supported package managers. It works in tandem with python-start. python-start will add a requirement that is fulfilled by this buildpack.

It is currently used as an opt-in to allow Paketo users to do tests before the old buildpacks get retired.

BP_ENABLE_PACKAGE_MANAGERS=true

Usage

To package this buildpack for consumption:

$ ./scripts/package.sh --version x.x.x

This will create a buildpackage.cnb file under the build directory which you can use to build your app as follows: pack build <app-name> -p <path-to-app> -b <cpython buildpack> -b <pip buildpack> -b build/buildpackage.cnb -b <other-buildpacks..>.

To run the unit and integration tests for this buildpack:

$ ./scripts/unit.sh && ./scripts/integration.sh