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Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2022-03-20 10:36
__init__.py	30 B	-rw-r--r--	2018-11-07 22:14
common.py	16.9 KB	-rw-r--r--	2018-11-07 22:14
common_test.py	16.53 KB	-rw-r--r--	2018-11-07 22:14
disco.py	9.92 KB	-rw-r--r--	2018-11-07 22:14
disco_test.py	11.34 KB	-rw-r--r--	2018-11-07 22:14
dns_common.py	11.7 KB	-rw-r--r--	2018-11-07 22:14
dns_common_lexicon.py	3.96 KB	-rw-r--r--	2018-11-07 22:14
dns_common_lexicon_test.py	651 B	-rw-r--r--	2018-11-07 22:14
dns_common_test.py	8.25 KB	-rw-r--r--	2018-11-07 22:14
dns_test_common.py	1.61 KB	-rw-r--r--	2018-11-07 22:14
dns_test_common_lexicon.py	5.48 KB	-rw-r--r--	2018-11-07 22:14
enhancements.py	5.58 KB	-rw-r--r--	2018-11-07 22:14
enhancements_test.py	2.36 KB	-rw-r--r--	2018-11-07 22:14
manual.py	10.6 KB	-rw-r--r--	2018-11-07 22:14
manual_test.py	7.37 KB	-rw-r--r--	2018-11-07 22:14
null.py	1.34 KB	-rw-r--r--	2018-11-07 22:14
null_test.py	624 B	-rw-r--r--	2018-11-07 22:14
selection.py	13.55 KB	-rw-r--r--	2018-11-07 22:14
selection_test.py	7.77 KB	-rw-r--r--	2018-11-07 22:14
standalone.py	11.36 KB	-rw-r--r--	2018-11-07 22:14
standalone_test.py	9.2 KB	-rw-r--r--	2018-11-07 22:14
storage.py	4.08 KB	-rw-r--r--	2018-11-07 22:14
storage_test.py	5.37 KB	-rw-r--r--	2018-11-07 22:14
util.py	1.7 KB	-rw-r--r--	2018-11-07 22:14
util_test.py	1.61 KB	-rw-r--r--	2018-11-07 22:14
webroot.py	11.9 KB	-rw-r--r--	2018-11-07 22:14
webroot_test.py	11.95 KB	-rw-r--r--	2018-11-07 22:14

Rename

"""Plugin utilities."""
import logging
import os

from certbot import util

logger = logging.getLogger(__name__)

def get_prefixes(path):
    """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 = []
    while len(prefix) > 0:
        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):
    """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
    """
    dirs = ("/usr/sbin", "/usr/local/bin", "/usr/local/sbin")
    path = os.environ["PATH"]
    added = []
    for d in 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
    else:
        expanded = " expanded" if any(added) else ""
        logger.debug("Failed to find executable %s in%s PATH: %s", cmd,
                     expanded, path)
        return False