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EDITING: util.py

"""Plugin utilities."""
import logging
from typing import List

from certbot import util
from certbot.compat import os
from certbot.compat.misc import STANDARD_BINARY_DIRS

logger = logging.getLogger(__name__)

def get_prefixes(path: str) -> List[str]:
    """Retrieves all possible path prefixes of a path, in descending order
    of length. For instance:

* (Linux) `/a/b/c` returns `['/a/b/c', '/a/b', '/a', '/']`
      * (Windows) `C:\\a\\b\\c` returns `['C:\\a\\b\\c', 'C:\\a\\b', 'C:\\a', 'C:']`

:param str path: the path to break into prefixes

:returns: all possible path prefixes of given path in descending order
    :rtype: `list` of `str`
    """
    prefix = os.path.normpath(path)
    prefixes: List[str] = []
    while prefix:
        prefixes.append(prefix)
        prefix, _ = os.path.split(prefix)
        # break once we hit the root path
        if prefix == prefixes[-1]:
            break
    return prefixes

def path_surgery(cmd: str) -> bool:
    """Attempt to perform PATH surgery to find cmd

Mitigates https://github.com/certbot/certbot/issues/1833

:param str cmd: the command that is being searched for in the PATH

:returns: True if the operation succeeded, False otherwise
    """
    path = os.environ["PATH"]
    added = []
    for d in STANDARD_BINARY_DIRS:
        if d not in path:
            path += os.pathsep + d
            added.append(d)

if any(added):
        logger.debug("Can't find %s, attempting PATH mitigation by adding %s",
                     cmd, os.pathsep.join(added))
        os.environ["PATH"] = path

if util.exe_exists(cmd):
        return True
    expanded = " expanded" if any(added) else ""
    logger.debug("Failed to find executable %s in%s PATH: %s", cmd,
                 expanded, path)
    return False

CANCEL

Name	Type	Size	Modified	Actions
↩ ..	DIR	—	—
📁 __pycache__/	DIR	—	2022-09-04 02:36
📄 __init__.py	PY	23 B	2021-12-07 22:02	EDIT
📄 common.py	PY	16.7 KB	2021-12-07 22:02	EDIT
📄 dns_common.py	PY	13.5 KB	2021-12-07 22:02	EDIT
📄 dns_common_lexicon.py	PY	5.8 KB	2021-12-07 22:02	EDIT
📄 dns_test_common.py	PY	2.6 KB	2021-12-07 22:02	EDIT
📄 dns_test_common_lexicon.py	PY	7.4 KB	2021-12-07 22:02	EDIT
📄 enhancements.py	PY	6.6 KB	2021-12-07 22:02	EDIT
📄 storage.py	PY	4.2 KB	2021-12-07 22:02	EDIT
📄 util.py	PY	1.8 KB	2021-12-07 22:02	EDIT