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.. _declarative config: ------------------------------------------------ Configuring setuptools using ``setup.cfg`` files ------------------------------------------------ .. note:: New in 30.3.0 (8 Dec 2016). .. important:: If compatibility with legacy builds (i.e. those not using the :pep:`517` build API) is desired, a ``setup.py`` file containing a ``setup()`` function call is still required even if your configuration resides in ``setup.cfg``. ``Setuptools`` allows using configuration files (usually :file:`setup.cfg`) to define a package’s metadata and other options that are normally supplied to the ``setup()`` function (declarative config). This approach not only allows automation scenarios but also reduces boilerplate code in some cases. .. _example-setup-config: .. code-block:: ini [metadata] name = my_package version = attr: my_package.VERSION author = Josiah Carberry author_email = josiah_carberry@brown.edu description = My package description long_description = file: README.rst, CHANGELOG.rst, LICENSE.rst keywords = one, two license = BSD-3-Clause classifiers = Framework :: Django Programming Language :: Python :: 3 [options] zip_safe = False include_package_data = True packages = find: python_requires = >=3.7 install_requires = requests importlib-metadata; python_version<"3.8" [options.package_data] * = *.txt, *.rst hello = *.msg [options.entry_points] console_scripts = executable-name = my_package.module:function [options.extras_require] pdf = ReportLab>=1.2; RXP rest = docutils>=0.3; pack ==1.1, ==1.3 [options.packages.find] exclude = examples* tools* docs* my_package.tests* Metadata and options are set in the config sections of the same name. * Keys are the same as the :doc:`keyword arguments </references/keywords>` one provides to the ``setup()`` function. * Complex values can be written comma-separated or placed one per line in *dangling* config values. The following are equivalent: .. code-block:: ini [metadata] keywords = one, two [metadata] keywords = one two * In some cases, complex values can be provided in dedicated subsections for clarity. * Some keys allow ``file:``, ``attr:``, ``find:``, and ``find_namespace:`` directives in order to cover common usecases. * Unknown keys are ignored. Using a ``src/`` layout ======================= One commonly used configuration has all the Python source code in a subdirectory (often called the ``src/`` layout), like this:: ├── src │ └── mypackage │ ├── __init__.py │ └── mod1.py ├── setup.py └── setup.cfg You can set up your ``setup.cfg`` to automatically find all your packages in the subdirectory, using :ref:`package_dir <keyword/package_dir>`, like this: .. code-block:: ini # This example contains just the necessary options for a src-layout, set up # the rest of the file as described above. [options] package_dir= =src packages=find: [options.packages.find] where=src In this example, the value for the :ref:`package_dir <keyword/package_dir>` configuration (i.e. ``=src``) is parsed as ``{"": "src"}``. The ``""`` key has a special meaning in this context, and indicates that all the packages are contained inside the given directory. Also note that the value for ``[options.packages.find] where`` matches the value associated with ``""`` in the ``package_dir`` dictionary. .. TODO: Add the following tip once the auto-discovery is no longer experimental: Starting in version 61, ``setuptools`` can automatically infer the configurations for both ``packages`` and ``package_dir`` for projects using a ``src/`` layout (as long as no value is specified for ``py_modules``). Please see :doc:`package discovery </userguide/package_discovery>` for more details. Specifying values ================= Some values are treated as simple strings, some allow more logic. Type names used below: * ``str`` - simple string * ``list-comma`` - dangling list or string of comma-separated values * ``list-semi`` - dangling list or string of semicolon-separated values * ``bool`` - ``True`` is 1, yes, true * ``dict`` - list-comma where each entry corresponds to a key/value pair, with keys separated from values by ``=``. If an entry starts with ``=``, the key is assumed to be an empty string (e.g. ``=src`` is parsed as ``{"": "src"}``). * ``section`` - values are read from a dedicated (sub)section Special directives: * ``attr:`` - Value is read from a module attribute. It is advisable to use literal values together with ``attr:`` (e.g. ``str``, ``tuple[str]``, see :func:`ast.literal_eval`). This is recommend in order to support the common case of a literal value assigned to a variable in a module containing (directly or indirectly) third-party imports. ``attr:`` first tries to read the value from the module by examining the module's AST. If that fails, ``attr:`` falls back to importing the module, using :func:`importlib.util.spec_from_file_location` recommended recipe (see :ref:`example on Python docs <python:importlib-examples>` about "Importing a source file directly"). Note however that importing the module is error prone since your package is not installed yet. You may also need to manually add the project directory to ``sys.path`` (via ``setup.py``) in order to be able to do that. When the module is imported, ``attr:`` supports callables and iterables; unsupported types are cast using ``str()``. * ``file:`` - Value is read from a list of files and then concatenated .. important:: The ``file:`` directive is sandboxed and won't reach anything outside the project directory (i.e. the directory containing ``setup.cfg``/``pyproject.toml``). .. note:: If you are using an old version of ``setuptools``, you might need to ensure that all files referenced by the ``file:`` directive are included in the ``sdist`` (you can do that via ``MANIFEST.in`` or using plugins such as ``setuptools-scm``, please have a look on :doc:`/userguide/miscellaneous` for more information). .. versionchanged:: 66.1.0 Newer versions of ``setuptools`` will automatically add these files to the ``sdist``. Metadata -------- .. attention:: The aliases given below are supported for compatibility reasons, but their use is not advised. ============================== ================= ================= =============== ========== Key Aliases Type Minimum Version Notes ============================== ================= ================= =============== ========== name str version attr:, file:, str 39.2.0 [#meta-1]_ url home-page str download_url download-url str project_urls dict 38.3.0 author str author_email author-email str maintainer str maintainer_email maintainer-email str classifiers classifier file:, list-comma license str license_files license_file list-comma 42.0.0 description summary file:, str long_description long-description file:, str long_description_content_type str 38.6.0 keywords list-comma platforms platform list-comma provides list-comma requires list-comma obsoletes list-comma ============================== ================= ================= =============== ========== **Notes**: .. [#meta-1] The ``version`` file attribute has only been supported since 39.2.0. A version loaded using the ``file:`` directive must comply with PEP 440. It is easy to accidentally put something other than a valid version string in such a file, so validation is stricter in this case. Options ------- ======================= =================================== =============== ==================== Key Type Minimum Version Notes ======================= =================================== =============== ==================== zip_safe bool setup_requires list-semi 36.7.0 install_requires file:, list-semi **BETA** [#opt-2]_, [#opt-6]_ extras_require file:, section **BETA** [#opt-2]_, [#opt-6]_ python_requires str 34.4.0 entry_points file:, section 51.0.0 scripts list-comma eager_resources list-comma dependency_links list-comma tests_require list-semi include_package_data bool packages find:, find_namespace:, list-comma [#opt-3]_ package_dir dict package_data section [#opt-1]_ exclude_package_data section namespace_packages list-comma [#opt-5]_ py_modules list-comma 34.4.0 data_files section 40.6.0 [#opt-4]_ ======================= =================================== =============== ==================== **Notes**: .. [#opt-1] In the ``package_data`` section, a key named with a single asterisk (``*``) refers to all packages, in lieu of the empty string used in ``setup.py``. .. [#opt-2] In ``install_requires`` and ``extras_require``, values are parsed as ``list-semi``. This implies that in order to include markers, each requirement **must** be *dangling* in a new line: .. code-block:: ini [options] install_requires = importlib-metadata; python_version<"3.8" [options.extras_require] all = importlib-metadata; python_version < "3.8" .. [#opt-3] The ``find:`` and ``find_namespace:`` directive can be further configured in a dedicated subsection ``options.packages.find``. This subsection accepts the same keys as the ``setuptools.find_packages`` and the ``setuptools.find_namespace_packages`` function: ``where``, ``include``, and ``exclude``. The ``find_namespace:`` directive is supported since Python >=3.3. .. [#opt-4] ``data_files`` is deprecated and should be avoided. Please check :doc:`/userguide/datafiles` for more information. .. [#opt-5] ``namespace_packages`` is deprecated in favour of native/implicit namespaces (:pep:`420`). Check :doc:`the Python Packaging User Guide <PyPUG:guides/packaging-namespace-packages>` for more information. .. [#opt-6] ``file:`` directives for reading requirements are supported since version 62.6. The format for the file resembles a ``requirements.txt`` file, however please keep in mind that all non-comment lines must conform with :pep:`508` (``pip``-specify syntaxes, e.g. ``-c/-r/-e`` flags, are not supported). Library developers should avoid tightly pinning their dependencies to a specific version (e.g. via a "locked" requirements file). Compatibility with other tools ============================== Historically, several tools explored declarative package configuration in parallel. And several of them chose to place the packaging configuration within the project's :file:`setup.cfg` file. One of the first was ``distutils2``, which development has stopped in 2013. Other include ``pbr`` which is still under active development or ``d2to1``, which was a plug-in that backports declarative configuration to ``distutils``, but has had no release since Oct. 2015. As a way to harmonize packaging tools, ``setuptools``, having held the position of *de facto* standard, has gradually integrated those features as part of its core features. Still this has lead to some confusion and feature incompatibilities: - some tools support features others don't; - some have similar features but the declarative syntax differs; The table below tries to summarize the differences. But, please, refer to each tool documentation for up-to-date information. =========================== ========== ========== ===== === feature setuptools distutils2 d2to1 pbr =========================== ========== ========== ===== === [metadata] description-file S Y Y Y [files] S Y Y Y entry_points Y Y Y S [backwards_compat] N Y Y Y =========================== ========== ========== ===== === Y: supported, N: unsupported, S: syntax differs (see :ref:`above example<example-setup-config>`). Also note that some features were only recently added to ``setuptools``. Please refer to the previous sections to find out when.
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