⚠️ We recommend using Hatch Jupyter Builder instead of Jupyter Packaging for new and existing projects. See the blog post Packaging for Jupyter in 2022.

Tools to help build and install Jupyter Python packages that require a pre-build step that may include JavaScript build steps.

pip install jupyter-packaging

There are three ways to use jupyter-packaging in another package. In general, you should not depend on jupyter_packaging as a runtime dependency, only as a build dependency.

Use a pyproject.toml file as outlined in pep-518. An example:

[build-system] requires = ["jupyter_packaging>=0.10,<2"] build-backend = "setuptools.build_meta"

Below is an example setup.py using the above config. It assumes the rest of your metadata is in setup.cfg. We wrap the import in a try/catch to allow the file to be run without jupyter_packaging so that python setup.py can be run directly when not building.

from setuptools import setup try: from jupyter_packaging import wrap_installers, npm_builder builder = npm_builder() cmdclass = wrap_installers(pre_develop=builder, pre_dist=builder) except ImportError: cmdclass = {} setup(cmdclass=cmdclass))

Use the jupyter_packaging build backend. The pre-build command is specified as metadata in pyproject.toml:

[build-system] requires = ["jupyter_packaging>=0.10,<2"] build-backend = "jupyter_packaging.build_api" [tool.jupyter-packaging.builder] factory = "jupyter_packaging.npm_builder" [tool.jupyter-packaging.build-args] build_cmd = "build:src"

The corresponding setup.py would be greatly simplified:

from setuptools import setup setup()

The tool.jupyter-packaging.builder section expects a func value that points to an importable module and a function with dot separators. If not given, no pre-build function will run.

The optional tool.jupyter-packaging.build-args sections accepts a dict of keyword arguments to give to the pre-build command.

The build backend does not handle the develop command (pip install -e .). If desired, you can wrap just that command:

import setuptools try: from jupyter_packaging import wrap_installers, npm_builder builder = npm_builder(build_cmd="build:dev") cmdclass = wrap_installers(pre_develop=builder) except ImportError: cmdclass = {} setup(cmdclass=cmdclass))

The optional tool.jupyter-packaging.options section accepts the following options:

• skip-if-exists: A list of local files whose presence causes the prebuild to skip
• ensured-targets: A list of local file paths that should exist when the dist commands are run

Vendor setupbase.py locally alongside setup.py and import the module directly.

import setuptools from setupbase import wrap_installers, npm_builder func = npm_builder() cmdclass = wrap_installers(post_develop=func, pre_dist=func) setup(cmdclass=cmdclass)

• This package does not work with the deprecated python setup.py bdist_wheel or python setup.py sdist commands, PyPA recommends using the build package (pip install build && python -m build .).
• We recommend using include_package_data=True and MANIFEST.in to control the assets included in the package.
• Tools like check-manifest or manifix can be used to ensure the desired assets are included.
• Simple uses of data_files can be handled in setup.cfg or in setup.py. If recursive directories are needed use get_data_files() from this package.
• Unfortunately data_files are not supported in develop mode (a limitation of setuptools). You can work around it by doing a full install (pip install .) before the develop install (pip install -e .), or by adding a script to push the data files to sys.base_prefix.

git clone https://github.com/jupyter/jupyter-packaging.git cd jupyter-packaging pip install -e .[test] pre-commit install

You can test changes locally by creating a pyproject.toml with the following, replacing the local path to the git checkout:

[build-system] requires = ["jupyter_packaging@file://<path-to-git-checkout>"] build-backend = "setuptools.build_meta"

Note: you need to run pip cache remove jupyter_packaging any time changes are made to prevent pip from using a cached version of the source.