You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
103 lines
3.2 KiB
Python
103 lines
3.2 KiB
Python
3 years ago
|
"""
|
||
|
|
A module that implements tooling to enable easy warnings about deprecations.
|
||
|
|
"""
|
||
|
|
|
||
|
|
import logging
|
||
|
|
import warnings
|
||
|
|
from typing import Any, Optional, TextIO, Type, Union
|
||
|
|
|
||
|
|
from pip._vendor.packaging.version import parse
|
||
|
|
|
||
|
|
from pip import __version__ as current_version
|
||
|
|
|
||
|
|
DEPRECATION_MSG_PREFIX = "DEPRECATION: "
|
||
|
|
|
||
|
|
|
||
|
|
class PipDeprecationWarning(Warning):
|
||
|
|
pass
|
||
|
|
|
||
|
|
|
||
|
|
_original_showwarning = None # type: Any
|
||
|
|
|
||
|
|
|
||
|
|
# Warnings <-> Logging Integration
|
||
|
|
def _showwarning(
|
||
|
|
message, # type: Union[Warning, str]
|
||
|
|
category, # type: Type[Warning]
|
||
|
|
filename, # type: str
|
||
|
|
lineno, # type: int
|
||
|
|
file=None, # type: Optional[TextIO]
|
||
|
|
line=None, # type: Optional[str]
|
||
|
|
):
|
||
|
|
# type: (...) -> None
|
||
|
|
if file is not None:
|
||
|
|
if _original_showwarning is not None:
|
||
|
|
_original_showwarning(message, category, filename, lineno, file, line)
|
||
|
|
elif issubclass(category, PipDeprecationWarning):
|
||
|
|
# We use a specially named logger which will handle all of the
|
||
|
|
# deprecation messages for pip.
|
||
|
|
logger = logging.getLogger("pip._internal.deprecations")
|
||
|
|
logger.warning(message)
|
||
|
|
else:
|
||
|
|
_original_showwarning(message, category, filename, lineno, file, line)
|
||
|
|
|
||
|
|
|
||
|
|
def install_warning_logger():
|
||
|
|
# type: () -> None
|
||
|
|
# Enable our Deprecation Warnings
|
||
|
|
warnings.simplefilter("default", PipDeprecationWarning, append=True)
|
||
|
|
|
||
|
|
global _original_showwarning
|
||
|
|
|
||
|
|
if _original_showwarning is None:
|
||
|
|
_original_showwarning = warnings.showwarning
|
||
|
|
warnings.showwarning = _showwarning
|
||
|
|
|
||
|
|
|
||
|
|
def deprecated(reason, replacement, gone_in, issue=None):
|
||
|
|
# type: (str, Optional[str], Optional[str], Optional[int]) -> None
|
||
|
|
"""Helper to deprecate existing functionality.
|
||
|
|
|
||
|
|
reason:
|
||
|
|
Textual reason shown to the user about why this functionality has
|
||
|
|
been deprecated.
|
||
|
|
replacement:
|
||
|
|
Textual suggestion shown to the user about what alternative
|
||
|
|
functionality they can use.
|
||
|
|
gone_in:
|
||
|
|
The version of pip does this functionality should get removed in.
|
||
|
|
Raises errors if pip's current version is greater than or equal to
|
||
|
|
this.
|
||
|
|
issue:
|
||
|
|
Issue number on the tracker that would serve as a useful place for
|
||
|
|
users to find related discussion and provide feedback.
|
||
|
|
|
||
|
|
Always pass replacement, gone_in and issue as keyword arguments for clarity
|
||
|
|
at the call site.
|
||
|
|
"""
|
||
|
|
|
||
|
|
# Construct a nice message.
|
||
|
|
# This is eagerly formatted as we want it to get logged as if someone
|
||
|
|
# typed this entire message out.
|
||
|
|
sentences = [
|
||
|
|
(reason, DEPRECATION_MSG_PREFIX + "{}"),
|
||
|
|
(gone_in, "pip {} will remove support for this functionality."),
|
||
|
|
(replacement, "A possible replacement is {}."),
|
||
|
|
(
|
||
|
|
issue,
|
||
|
|
(
|
||
|
|
"You can find discussion regarding this at "
|
||
|
|
"https://github.com/pypa/pip/issues/{}."
|
||
|
|
),
|
||
|
|
),
|
||
|
|
]
|
||
|
|
message = " ".join(
|
||
|
|
template.format(val) for val, template in sentences if val is not None
|
||
|
|
)
|
||
|
|
|
||
|
|
# Raise as an error if it has to be removed.
|
||
|
|
if gone_in is not None and parse(current_version) >= parse(gone_in):
|
||
|
|
raise PipDeprecationWarning(message)
|
||
|
|
|
||
|
|
warnings.warn(message, category=PipDeprecationWarning, stacklevel=2)
|