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73 lines
2.0 KiB
Python
73 lines
2.0 KiB
Python
from __future__ import annotations
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import warnings
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from . import __version__
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def deprecate(
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deprecated: str,
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when: int | None,
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replacement: str | None = None,
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*,
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action: str | None = None,
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plural: bool = False,
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stacklevel: int = 3,
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) -> None:
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"""
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Deprecations helper.
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:param deprecated: Name of thing to be deprecated.
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:param when: Pillow major version to be removed in.
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:param replacement: Name of replacement.
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:param action: Instead of "replacement", give a custom call to action
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e.g. "Upgrade to new thing".
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:param plural: if the deprecated thing is plural, needing "are" instead of "is".
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Usually of the form:
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"[deprecated] is deprecated and will be removed in Pillow [when] (yyyy-mm-dd).
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Use [replacement] instead."
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You can leave out the replacement sentence:
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"[deprecated] is deprecated and will be removed in Pillow [when] (yyyy-mm-dd)"
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Or with another call to action:
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"[deprecated] is deprecated and will be removed in Pillow [when] (yyyy-mm-dd).
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[action]."
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"""
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is_ = "are" if plural else "is"
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if when is None:
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removed = "a future version"
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elif when <= int(__version__.split(".")[0]):
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msg = f"{deprecated} {is_} deprecated and should be removed."
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raise RuntimeError(msg)
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elif when == 12:
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removed = "Pillow 12 (2025-10-15)"
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elif when == 13:
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removed = "Pillow 13 (2026-10-15)"
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else:
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msg = f"Unknown removal version: {when}. Update {__name__}?"
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raise ValueError(msg)
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if replacement and action:
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msg = "Use only one of 'replacement' and 'action'"
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raise ValueError(msg)
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if replacement:
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action = f". Use {replacement} instead."
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elif action:
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action = f". {action.rstrip('.')}."
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else:
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action = ""
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warnings.warn(
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f"{deprecated} {is_} deprecated and will be removed in {removed}{action}",
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DeprecationWarning,
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stacklevel=stacklevel,
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)
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