77 lines
2.2 KiB
Python
77 lines
2.2 KiB
Python
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"""
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A module that implments tooling to enable easy warnings about deprecations.
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"""
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from __future__ import absolute_import
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import logging
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import warnings
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class PipDeprecationWarning(Warning):
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pass
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class RemovedInPip9Warning(PipDeprecationWarning, DeprecationWarning):
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pass
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class RemovedInPip10Warning(PipDeprecationWarning, PendingDeprecationWarning):
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pass
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class Python26DeprecationWarning(
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PipDeprecationWarning, PendingDeprecationWarning
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):
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pass
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DEPRECATIONS = [
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RemovedInPip9Warning, RemovedInPip10Warning, Python26DeprecationWarning
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]
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# Warnings <-> Logging Integration
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_warnings_showwarning = None
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def _showwarning(message, category, filename, lineno, file=None, line=None):
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if file is not None:
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if _warnings_showwarning is not None:
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_warnings_showwarning(
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message, category, filename, lineno, file, line,
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)
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else:
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if issubclass(category, PipDeprecationWarning):
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# We use a specially named logger which will handle all of the
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# deprecation messages for pip.
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logger = logging.getLogger("pip.deprecations")
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# This is purposely using the % formatter here instead of letting
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# the logging module handle the interpolation. This is because we
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# want it to appear as if someone typed this entire message out.
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log_message = "DEPRECATION: %s" % message
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# Things that are DeprecationWarnings will be removed in the very
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# next version of pip. We want these to be more obvious so we
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# use the ERROR logging level while the PendingDeprecationWarnings
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# are still have at least 2 versions to go until they are removed
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# so they can just be warnings.
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if issubclass(category, DeprecationWarning):
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logger.error(log_message)
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else:
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logger.warning(log_message)
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else:
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_warnings_showwarning(
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message, category, filename, lineno, file, line,
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)
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def install_warning_logger():
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global _warnings_showwarning
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if _warnings_showwarning is None:
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_warnings_showwarning = warnings.showwarning
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warnings.showwarning = _showwarning
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