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import fnmatch
import os
import os.path
import random
import shutil
import stat
import sys
from contextlib import contextmanager
from tempfile import NamedTemporaryFile
from typing import Any, BinaryIO, Iterator, List, Union, cast
from pip._vendor.tenacity import retry, stop_after_delay, wait_fixed
from pip._internal.utils.compat import get_path_uid
from pip._internal.utils.misc import format_size
def check_path_owner(path: str) -> bool:
# If we don't have a way to check the effective uid of this process, then
# we'll just assume that we own the directory.
if sys.platform == "win32" or not hasattr(os, "geteuid"):
return True
assert os.path.isabs(path)
previous = None
while path != previous:
if os.path.lexists(path):
# Check if path is writable by current user.
if os.geteuid() == 0:
# Special handling for root user in order to handle properly
# cases where users use sudo without -H flag.
try:
path_uid = get_path_uid(path)
except OSError:
return False
return path_uid == 0
else:
return os.access(path, os.W_OK)
else:
previous, path = path, os.path.dirname(path)
return False # assume we don't own the path
def copy2_fixed(src: str, dest: str) -> None:
"""Wrap shutil.copy2() but map errors copying socket files to
SpecialFileError as expected.
See also https://bugs.python.org/issue37700.
"""
try:
shutil.copy2(src, dest)
except OSError:
for f in [src, dest]:
try:
is_socket_file = is_socket(f)
except OSError:
# An error has already occurred. Another error here is not
# a problem and we can ignore it.
pass
else:
if is_socket_file:
raise shutil.SpecialFileError(f"`{f}` is a socket")
raise
def is_socket(path: str) -> bool:
return stat.S_ISSOCK(os.lstat(path).st_mode)
@contextmanager
def adjacent_tmp_file(path: str, **kwargs: Any) -> Iterator[BinaryIO]:
"""Return a file-like object pointing to a tmp file next to path.
The file is created securely and is ensured to be written to disk
after the context reaches its end.
kwargs will be passed to tempfile.NamedTemporaryFile to control
the way the temporary file will be opened.
"""
with NamedTemporaryFile(
delete=False,
dir=os.path.dirname(path),
prefix=os.path.basename(path),
suffix=".tmp",
**kwargs,
) as f:
result = cast(BinaryIO, f)
try:
yield result
finally:
result.flush()
os.fsync(result.fileno())
# Tenacity raises RetryError by default, explicitly raise the original exception
_replace_retry = retry(reraise=True, stop=stop_after_delay(1), wait=wait_fixed(0.25))
replace = _replace_retry(os.replace)
# test_writable_dir and _test_writable_dir_win are copied from Flit,
# with the author's agreement to also place them under pip's license.
def test_writable_dir(path: str) -> bool:
"""Check if a directory is writable.
Uses os.access() on POSIX, tries creating files on Windows.
"""
# If the directory doesn't exist, find the closest parent that does.
while not os.path.isdir(path):
parent = os.path.dirname(path)
if parent == path:
break # Should never get here, but infinite loops are bad
path = parent
if os.name == "posix":
return os.access(path, os.W_OK)
return _test_writable_dir_win(path)
def _test_writable_dir_win(path: str) -> bool:
# os.access doesn't work on Windows: http://bugs.python.org/issue2528
# and we can't use tempfile: http://bugs.python.org/issue22107
basename = "accesstest_deleteme_fishfingers_custard_"
alphabet = "abcdefghijklmnopqrstuvwxyz0123456789"
for _ in range(10):
name = basename + "".join(random.choice(alphabet) for _ in range(6))
file = os.path.join(path, name)
try:
fd = os.open(file, os.O_RDWR | os.O_CREAT | os.O_EXCL)
except FileExistsError:
pass
except PermissionError:
# This could be because there's a directory with the same name.
# But it's highly unlikely there's a directory called that,
# so we'll assume it's because the parent dir is not writable.
# This could as well be because the parent dir is not readable,
# due to non-privileged user access.
return False
else:
os.close(fd)
os.unlink(file)
return True
# This should never be reached
raise OSError("Unexpected condition testing for writable directory")
def find_files(path: str, pattern: str) -> List[str]:
"""Returns a list of absolute paths of files beneath path, recursively,
with filenames which match the UNIX-style shell glob pattern."""
result: List[str] = []
for root, _, files in os.walk(path):
matches = fnmatch.filter(files, pattern)
result.extend(os.path.join(root, f) for f in matches)
return result
def file_size(path: str) -> Union[int, float]:
# If it's a symlink, return 0.
if os.path.islink(path):
return 0
return os.path.getsize(path)
def format_file_size(path: str) -> str:
return format_size(file_size(path))
def directory_size(path: str) -> Union[int, float]:
size = 0.0
for root, _dirs, files in os.walk(path):
for filename in files:
file_path = os.path.join(root, filename)
size += file_size(file_path)
return size
def format_directory_size(path: str) -> str:
return format_size(directory_size(path))
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