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Name	Size	Permission
__pycache__	[ DIR ]	drwxr-xr-x
__init__.py	0 B	-rw-r--r--
appdirs.py	9.54 KB	-rw-r--r--
compat.py	9.34 KB	-rw-r--r--
deprecation.py	3.24 KB	-rw-r--r--
encoding.py	1.29 KB	-rw-r--r--
filesystem.py	3.26 KB	-rw-r--r--
filetypes.py	571 B	-rw-r--r--
glibc.py	4.29 KB	-rw-r--r--
hashes.py	3.93 KB	-rw-r--r--
inject_securetransport.py	810 B	-rw-r--r--
logging.py	12.73 KB	-rw-r--r--
marker_files.py	823 B	-rw-r--r--
misc.py	24.98 KB	-rw-r--r--
models.py	1.12 KB	-rw-r--r--
packaging.py	2.96 KB	-rw-r--r--
setuptools_build.py	1.59 KB	-rw-r--r--
subprocess.py	9.68 KB	-rw-r--r--
temp_dir.py	5.39 KB	-rw-r--r--
typing.py	1.1 KB	-rw-r--r--
ui.py	13.58 KB	-rw-r--r--
unpacking.py	9.46 KB	-rw-r--r--
urls.py	1.45 KB	-rw-r--r--
virtualenv.py	891 B	-rw-r--r--

Code Editor : deprecation.py

"""
A module that implements tooling to enable easy warnings about deprecations.
"""

# The following comment should be removed at some point in the future.
# mypy: disallow-untyped-defs=False

from __future__ import absolute_import

import logging
import warnings

from pip._vendor.packaging.version import parse

from pip import __version__ as current_version
from pip._internal.utils.typing import MYPY_CHECK_RUNNING

if MYPY_CHECK_RUNNING:
    from typing import Any, Optional

DEPRECATION_MSG_PREFIX = "DEPRECATION: "

class PipDeprecationWarning(Warning):
    pass

_original_showwarning = None  # type: Any

# Warnings <-> Logging Integration
def _showwarning(message, category, filename, lineno, file=None, line=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)

${this.title}

Code Editor : deprecation.py