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31 lines
1.5 KiB
ReStructuredText
31 lines
1.5 KiB
ReStructuredText
.. _versioning:
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Versioning
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==========
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Pillow follows `Semantic Versioning <https://semver.org/>`_:
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Given a version number MAJOR.MINOR.PATCH, increment the:
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1. MAJOR version when you make incompatible API changes,
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2. MINOR version when you add functionality in a backwards compatible manner, and
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3. PATCH version when you make backwards compatible bug fixes.
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Quarterly releases ("`Main Release <https://github.com/python-pillow/Pillow/blob/main/RELEASING.md#user-content-main-release>`_")
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bump at least the MINOR version, as new functionality has likely been added in the
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prior three months.
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A quarterly release bumps the MAJOR version when incompatible API changes are
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made, such as removing deprecated APIs or dropping an EOL Python version. In practice,
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these occur every 12-18 months, guided by
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`Python's EOL schedule <https://devguide.python.org/#status-of-python-branches>`_, and
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any APIs that have been deprecated for at least a year are removed at the same time.
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PATCH versions ("`Point Release <https://github.com/python-pillow/Pillow/blob/main/RELEASING.md#user-content-point-release>`_"
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or "`Embargoed Release <https://github.com/python-pillow/Pillow/blob/main/RELEASING.md#user-content-embargoed-release>`_")
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are for security, installation or critical bug fixes. These are less common as it is
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preferred to stick to quarterly releases.
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Between quarterly releases, ``.dev0`` is appended to the ``main`` branch, indicating that
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this is not a formally released copy.
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