297 lines
9.1 KiB
Python
297 lines
9.1 KiB
Python
import errno
|
|
import itertools
|
|
import logging
|
|
import os.path
|
|
import tempfile
|
|
import traceback
|
|
from contextlib import ExitStack, contextmanager
|
|
from pathlib import Path
|
|
from typing import (
|
|
Any,
|
|
Callable,
|
|
Dict,
|
|
Generator,
|
|
List,
|
|
Optional,
|
|
TypeVar,
|
|
Union,
|
|
)
|
|
|
|
from pip._internal.utils.misc import enum, rmtree
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
_T = TypeVar("_T", bound="TempDirectory")
|
|
|
|
|
|
# Kinds of temporary directories. Only needed for ones that are
|
|
# globally-managed.
|
|
tempdir_kinds = enum(
|
|
BUILD_ENV="build-env",
|
|
EPHEM_WHEEL_CACHE="ephem-wheel-cache",
|
|
REQ_BUILD="req-build",
|
|
)
|
|
|
|
|
|
_tempdir_manager: Optional[ExitStack] = None
|
|
|
|
|
|
@contextmanager
|
|
def global_tempdir_manager() -> Generator[None, None, None]:
|
|
global _tempdir_manager
|
|
with ExitStack() as stack:
|
|
old_tempdir_manager, _tempdir_manager = _tempdir_manager, stack
|
|
try:
|
|
yield
|
|
finally:
|
|
_tempdir_manager = old_tempdir_manager
|
|
|
|
|
|
class TempDirectoryTypeRegistry:
|
|
"""Manages temp directory behavior"""
|
|
|
|
def __init__(self) -> None:
|
|
self._should_delete: Dict[str, bool] = {}
|
|
|
|
def set_delete(self, kind: str, value: bool) -> None:
|
|
"""Indicate whether a TempDirectory of the given kind should be
|
|
auto-deleted.
|
|
"""
|
|
self._should_delete[kind] = value
|
|
|
|
def get_delete(self, kind: str) -> bool:
|
|
"""Get configured auto-delete flag for a given TempDirectory type,
|
|
default True.
|
|
"""
|
|
return self._should_delete.get(kind, True)
|
|
|
|
|
|
_tempdir_registry: Optional[TempDirectoryTypeRegistry] = None
|
|
|
|
|
|
@contextmanager
|
|
def tempdir_registry() -> Generator[TempDirectoryTypeRegistry, None, None]:
|
|
"""Provides a scoped global tempdir registry that can be used to dictate
|
|
whether directories should be deleted.
|
|
"""
|
|
global _tempdir_registry
|
|
old_tempdir_registry = _tempdir_registry
|
|
_tempdir_registry = TempDirectoryTypeRegistry()
|
|
try:
|
|
yield _tempdir_registry
|
|
finally:
|
|
_tempdir_registry = old_tempdir_registry
|
|
|
|
|
|
class _Default:
|
|
pass
|
|
|
|
|
|
_default = _Default()
|
|
|
|
|
|
class TempDirectory:
|
|
"""Helper class that owns and cleans up a temporary directory.
|
|
|
|
This class can be used as a context manager or as an OO representation of a
|
|
temporary directory.
|
|
|
|
Attributes:
|
|
path
|
|
Location to the created temporary directory
|
|
delete
|
|
Whether the directory should be deleted when exiting
|
|
(when used as a contextmanager)
|
|
|
|
Methods:
|
|
cleanup()
|
|
Deletes the temporary directory
|
|
|
|
When used as a context manager, if the delete attribute is True, on
|
|
exiting the context the temporary directory is deleted.
|
|
"""
|
|
|
|
def __init__(
|
|
self,
|
|
path: Optional[str] = None,
|
|
delete: Union[bool, None, _Default] = _default,
|
|
kind: str = "temp",
|
|
globally_managed: bool = False,
|
|
ignore_cleanup_errors: bool = True,
|
|
):
|
|
super().__init__()
|
|
|
|
if delete is _default:
|
|
if path is not None:
|
|
# If we were given an explicit directory, resolve delete option
|
|
# now.
|
|
delete = False
|
|
else:
|
|
# Otherwise, we wait until cleanup and see what
|
|
# tempdir_registry says.
|
|
delete = None
|
|
|
|
# The only time we specify path is in for editables where it
|
|
# is the value of the --src option.
|
|
if path is None:
|
|
path = self._create(kind)
|
|
|
|
self._path = path
|
|
self._deleted = False
|
|
self.delete = delete
|
|
self.kind = kind
|
|
self.ignore_cleanup_errors = ignore_cleanup_errors
|
|
|
|
if globally_managed:
|
|
assert _tempdir_manager is not None
|
|
_tempdir_manager.enter_context(self)
|
|
|
|
@property
|
|
def path(self) -> str:
|
|
assert not self._deleted, f"Attempted to access deleted path: {self._path}"
|
|
return self._path
|
|
|
|
def __repr__(self) -> str:
|
|
return f"<{self.__class__.__name__} {self.path!r}>"
|
|
|
|
def __enter__(self: _T) -> _T:
|
|
return self
|
|
|
|
def __exit__(self, exc: Any, value: Any, tb: Any) -> None:
|
|
if self.delete is not None:
|
|
delete = self.delete
|
|
elif _tempdir_registry:
|
|
delete = _tempdir_registry.get_delete(self.kind)
|
|
else:
|
|
delete = True
|
|
|
|
if delete:
|
|
self.cleanup()
|
|
|
|
def _create(self, kind: str) -> str:
|
|
"""Create a temporary directory and store its path in self.path"""
|
|
# We realpath here because some systems have their default tmpdir
|
|
# symlinked to another directory. This tends to confuse build
|
|
# scripts, so we canonicalize the path by traversing potential
|
|
# symlinks here.
|
|
path = os.path.realpath(tempfile.mkdtemp(prefix=f"pip-{kind}-"))
|
|
logger.debug("Created temporary directory: %s", path)
|
|
return path
|
|
|
|
def cleanup(self) -> None:
|
|
"""Remove the temporary directory created and reset state"""
|
|
self._deleted = True
|
|
if not os.path.exists(self._path):
|
|
return
|
|
|
|
errors: List[BaseException] = []
|
|
|
|
def onerror(
|
|
func: Callable[..., Any],
|
|
path: Path,
|
|
exc_val: BaseException,
|
|
) -> None:
|
|
"""Log a warning for a `rmtree` error and continue"""
|
|
formatted_exc = "\n".join(
|
|
traceback.format_exception_only(type(exc_val), exc_val)
|
|
)
|
|
formatted_exc = formatted_exc.rstrip() # remove trailing new line
|
|
if func in (os.unlink, os.remove, os.rmdir):
|
|
logger.debug(
|
|
"Failed to remove a temporary file '%s' due to %s.\n",
|
|
path,
|
|
formatted_exc,
|
|
)
|
|
else:
|
|
logger.debug("%s failed with %s.", func.__qualname__, formatted_exc)
|
|
errors.append(exc_val)
|
|
|
|
if self.ignore_cleanup_errors:
|
|
try:
|
|
# first try with tenacity; retrying to handle ephemeral errors
|
|
rmtree(self._path, ignore_errors=False)
|
|
except OSError:
|
|
# last pass ignore/log all errors
|
|
rmtree(self._path, onexc=onerror)
|
|
if errors:
|
|
logger.warning(
|
|
"Failed to remove contents in a temporary directory '%s'.\n"
|
|
"You can safely remove it manually.",
|
|
self._path,
|
|
)
|
|
else:
|
|
rmtree(self._path)
|
|
|
|
|
|
class AdjacentTempDirectory(TempDirectory):
|
|
"""Helper class that creates a temporary directory adjacent to a real one.
|
|
|
|
Attributes:
|
|
original
|
|
The original directory to create a temp directory for.
|
|
path
|
|
After calling create() or entering, contains the full
|
|
path to the temporary directory.
|
|
delete
|
|
Whether the directory should be deleted when exiting
|
|
(when used as a contextmanager)
|
|
|
|
"""
|
|
|
|
# The characters that may be used to name the temp directory
|
|
# We always prepend a ~ and then rotate through these until
|
|
# a usable name is found.
|
|
# pkg_resources raises a different error for .dist-info folder
|
|
# with leading '-' and invalid metadata
|
|
LEADING_CHARS = "-~.=%0123456789"
|
|
|
|
def __init__(self, original: str, delete: Optional[bool] = None) -> None:
|
|
self.original = original.rstrip("/\\")
|
|
super().__init__(delete=delete)
|
|
|
|
@classmethod
|
|
def _generate_names(cls, name: str) -> Generator[str, None, None]:
|
|
"""Generates a series of temporary names.
|
|
|
|
The algorithm replaces the leading characters in the name
|
|
with ones that are valid filesystem characters, but are not
|
|
valid package names (for both Python and pip definitions of
|
|
package).
|
|
"""
|
|
for i in range(1, len(name)):
|
|
for candidate in itertools.combinations_with_replacement(
|
|
cls.LEADING_CHARS, i - 1
|
|
):
|
|
new_name = "~" + "".join(candidate) + name[i:]
|
|
if new_name != name:
|
|
yield new_name
|
|
|
|
# If we make it this far, we will have to make a longer name
|
|
for i in range(len(cls.LEADING_CHARS)):
|
|
for candidate in itertools.combinations_with_replacement(
|
|
cls.LEADING_CHARS, i
|
|
):
|
|
new_name = "~" + "".join(candidate) + name
|
|
if new_name != name:
|
|
yield new_name
|
|
|
|
def _create(self, kind: str) -> str:
|
|
root, name = os.path.split(self.original)
|
|
for candidate in self._generate_names(name):
|
|
path = os.path.join(root, candidate)
|
|
try:
|
|
os.mkdir(path)
|
|
except OSError as ex:
|
|
# Continue if the name exists already
|
|
if ex.errno != errno.EEXIST:
|
|
raise
|
|
else:
|
|
path = os.path.realpath(path)
|
|
break
|
|
else:
|
|
# Final fallback on the default behavior.
|
|
path = os.path.realpath(tempfile.mkdtemp(prefix=f"pip-{kind}-"))
|
|
|
|
logger.debug("Created temporary directory: %s", path)
|
|
return path
|