76 lines
2.2 KiB
Python
76 lines
2.2 KiB
Python
"""
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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 Pending(object):
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pass
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class RemovedInPip9Warning(PipDeprecationWarning):
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pass
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class RemovedInPip10Warning(PipDeprecationWarning, Pending):
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pass
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class Python26DeprecationWarning(PipDeprecationWarning, Pending):
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pass
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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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# PipDeprecationWarnings that are Pending still have at least 2
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# versions to go until they are removed so they can just be
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# warnings. Otherwise, they will be removed in the very next
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# version of pip. We want these to be more obvious so we use the
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# ERROR logging level.
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if issubclass(category, Pending):
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logger.warning(log_message)
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else:
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logger.error(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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# Enable our Deprecation Warnings
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warnings.simplefilter("default", PipDeprecationWarning, append=True)
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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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