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111 lines
3.7 KiB
Python
111 lines
3.7 KiB
Python
"""Provide basic warnings used by setuptools modules.
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Using custom classes (other than ``UserWarning``) allow users to set
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``PYTHONWARNINGS`` filters to run tests and prepare for upcoming changes in
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setuptools.
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"""
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from __future__ import annotations
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import os
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import warnings
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from datetime import date
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from inspect import cleandoc
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from textwrap import indent
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from typing import TYPE_CHECKING
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if TYPE_CHECKING:
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from typing_extensions import TypeAlias
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_DueDate: TypeAlias = tuple[int, int, int] # time tuple
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_INDENT = 8 * " "
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_TEMPLATE = f"""{80 * '*'}\n{{details}}\n{80 * '*'}"""
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class SetuptoolsWarning(UserWarning):
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"""Base class in ``setuptools`` warning hierarchy."""
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@classmethod
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def emit(
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cls,
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summary: str | None = None,
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details: str | None = None,
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due_date: _DueDate | None = None,
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see_docs: str | None = None,
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see_url: str | None = None,
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stacklevel: int = 2,
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**kwargs,
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) -> None:
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"""Private: reserved for ``setuptools`` internal use only"""
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# Default values:
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summary_ = summary or getattr(cls, "_SUMMARY", None) or ""
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details_ = details or getattr(cls, "_DETAILS", None) or ""
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due_date = due_date or getattr(cls, "_DUE_DATE", None)
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docs_ref = see_docs or getattr(cls, "_SEE_DOCS", None)
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docs_url = docs_ref and f"https://setuptools.pypa.io/en/latest/{docs_ref}"
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see_url = see_url or getattr(cls, "_SEE_URL", None)
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due = date(*due_date) if due_date else None
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text = cls._format(summary_, details_, due, see_url or docs_url, kwargs)
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if due and due < date.today() and _should_enforce():
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raise cls(text)
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warnings.warn(text, cls, stacklevel=stacklevel + 1)
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@classmethod
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def _format(
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cls,
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summary: str,
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details: str,
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due_date: date | None = None,
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see_url: str | None = None,
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format_args: dict | None = None,
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) -> str:
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"""Private: reserved for ``setuptools`` internal use only"""
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today = date.today()
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summary = cleandoc(summary).format_map(format_args or {})
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possible_parts = [
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cleandoc(details).format_map(format_args or {}),
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(
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f"\nBy {due_date:%Y-%b-%d}, you need to update your project and remove "
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"deprecated calls\nor your builds will no longer be supported."
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if due_date and due_date > today
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else None
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),
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(
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"\nThis deprecation is overdue, please update your project and remove "
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"deprecated\ncalls to avoid build errors in the future."
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if due_date and due_date < today
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else None
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),
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(f"\nSee {see_url} for details." if see_url else None),
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]
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parts = [x for x in possible_parts if x]
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if parts:
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body = indent(_TEMPLATE.format(details="\n".join(parts)), _INDENT)
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return "\n".join([summary, "!!\n", body, "\n!!"])
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return summary
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class InformationOnly(SetuptoolsWarning):
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"""Currently there is no clear way of displaying messages to the users
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that use the setuptools backend directly via ``pip``.
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The only thing that might work is a warning, although it is not the
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most appropriate tool for the job...
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See pypa/packaging-problems#558.
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"""
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class SetuptoolsDeprecationWarning(SetuptoolsWarning):
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"""
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Base class for warning deprecations in ``setuptools``
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This class is not derived from ``DeprecationWarning``, and as such is
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visible by default.
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"""
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def _should_enforce():
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enforce = os.getenv("SETUPTOOLS_ENFORCE_DEPRECATION", "false").lower()
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return enforce in ("true", "on", "ok", "1")
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