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ðŸ“ ..
ðŸ“„ __init__.py(0 B)
ðŸ“ __pycache__
ðŸ“„ _log.py(1015 B)
ðŸ“„ appdirs.py(1.63 KB)
ðŸ“„ compat.py(1.84 KB)
ðŸ“„ compatibility_tags.py(5.25 KB)
ðŸ“„ datetime.py(242 B)
ðŸ“„ deprecation.py(3.54 KB)
ðŸ“„ direct_url_helpers.py(3.13 KB)
ðŸ“„ distutils_args.py(1.22 KB)
ðŸ“„ egg_link.py(2.15 KB)
ðŸ“„ encoding.py(1.14 KB)
ðŸ“„ entrypoints.py(1.1 KB)
ðŸ“„ filesystem.py(5.75 KB)
ðŸ“„ filetypes.py(716 B)
ðŸ“„ glibc.py(3.04 KB)
ðŸ“„ hashes.py(4.7 KB)
ðŸ“„ inject_securetransport.py(795 B)
ðŸ“„ logging.py(11.26 KB)
ðŸ“„ misc.py(20.29 KB)
ðŸ“„ models.py(1.17 KB)
ðŸ“„ packaging.py(2.88 KB)
ðŸ“„ parallel.py(3.12 KB)
ðŸ“„ pkg_resources.py(987 B)
ðŸ“„ setuptools_build.py(4.59 KB)
ðŸ“„ subprocess.py(9.82 KB)
ðŸ“„ temp_dir.py(7.48 KB)
ðŸ“„ unpacking.py(8.7 KB)
ðŸ“„ urls.py(1.72 KB)
ðŸ“„ virtualenv.py(3.38 KB)
ðŸ“„ wheel.py(6.02 KB)

Editing: egg_link.py

# The following comment should be removed at some point in the future.
# mypy: strict-optional=False

import os
import re
import sys
from typing import Optional

from pip._internal.locations import site_packages, user_site
from pip._internal.utils.virtualenv import (
    running_under_virtualenv,
    virtualenv_no_global,
)

__all__ = [
    "egg_link_path_from_sys_path",
    "egg_link_path_from_location",
]

def _egg_link_name(raw_name: str) -> str:
    """
    Convert a Name metadata value to a .egg-link name, by applying
    the same substitution as pkg_resources's safe_name function.
    Note: we cannot use canonicalize_name because it has a different logic.
    """
    return re.sub("[^A-Za-z0-9.]+", "-", raw_name) + ".egg-link"

def egg_link_path_from_sys_path(raw_name: str) -> Optional[str]:
    """
    Look for a .egg-link file for project name, by walking sys.path.
    """
    egg_link_name = _egg_link_name(raw_name)
    for path_item in sys.path:
        egg_link = os.path.join(path_item, egg_link_name)
        if os.path.isfile(egg_link):
            return egg_link
    return None

def egg_link_path_from_location(raw_name: str) -> Optional[str]:
    """
    Return the path for the .egg-link file if it exists, otherwise, None.

There's 3 scenarios:
    1) not in a virtualenv
       try to find in site.USER_SITE, then site_packages
    2) in a no-global virtualenv
       try to find in site_packages
    3) in a yes-global virtualenv
       try to find in site_packages, then site.USER_SITE
       (don't look in global location)

For #1 and #3, there could be odd cases, where there's an egg-link in 2
    locations.

This method will just return the first one found.
    """
    sites = []
    if running_under_virtualenv():
        sites.append(site_packages)
        if not virtualenv_no_global() and user_site:
            sites.append(user_site)
    else:
        if user_site:
            sites.append(user_site)
        sites.append(site_packages)

egg_link_name = _egg_link_name(raw_name)
    for site in sites:
        egglink = os.path.join(site, egg_link_name)
        if os.path.isfile(egglink):
            return egglink
    return None

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