# mypy: allow-untyped-defs
"""Support for providing temporary directories to test functions."""
import dataclasses
import os
from pathlib import Path
import re
from shutil import rmtree
import tempfile
from typing import Any
from typing import Dict
from typing import final
from typing import Generator
from typing import Literal
from typing import Optional
from typing import Union
from .pathlib import cleanup_dead_symlinks
from .pathlib import LOCK_TIMEOUT
from .pathlib import make_numbered_dir
from .pathlib import make_numbered_dir_with_cleanup
from .pathlib import rm_rf
from _pytest.compat import get_user_id
from _pytest.config import Config
from _pytest.config import ExitCode
from _pytest.config import hookimpl
from _pytest.config.argparsing import Parser
from _pytest.deprecated import check_ispytest
from _pytest.fixtures import fixture
from _pytest.fixtures import FixtureRequest
from _pytest.monkeypatch import MonkeyPatch
from _pytest.nodes import Item
from _pytest.reports import TestReport
from _pytest.stash import StashKey
tmppath_result_key = StashKey[Dict[str, bool]]()
RetentionType = Literal["all", "failed", "none"]
[docs]
@final
@dataclasses.dataclass
class TempPathFactory:
"""Factory for temporary directories under the common base temp directory.
The base directory can be configured using the ``--basetemp`` option.
"""
_given_basetemp: Optional[Path]
# pluggy TagTracerSub, not currently exposed, so Any.
_trace: Any
_basetemp: Optional[Path]
_retention_count: int
_retention_policy: RetentionType
def __init__(
self,
given_basetemp: Optional[Path],
retention_count: int,
retention_policy: RetentionType,
trace,
basetemp: Optional[Path] = None,
*,
_ispytest: bool = False,
) -> None:
check_ispytest(_ispytest)
if given_basetemp is None:
self._given_basetemp = None
else:
# Use os.path.abspath() to get absolute path instead of resolve() as it
# does not work the same in all platforms (see #4427).
# Path.absolute() exists, but it is not public (see https://bugs.python.org/issue25012).
self._given_basetemp = Path(os.path.abspath(str(given_basetemp)))
self._trace = trace
self._retention_count = retention_count
self._retention_policy = retention_policy
self._basetemp = basetemp
@classmethod
def from_config(
cls,
config: Config,
*,
_ispytest: bool = False,
) -> "TempPathFactory":
"""Create a factory according to pytest configuration.
:meta private:
"""
check_ispytest(_ispytest)
count = int(config.getini("tmp_path_retention_count"))
if count < 0:
raise ValueError(
f"tmp_path_retention_count must be >= 0. Current input: {count}."
)
policy = config.getini("tmp_path_retention_policy")
if policy not in ("all", "failed", "none"):
raise ValueError(
f"tmp_path_retention_policy must be either all, failed, none. Current input: {policy}."
)
return cls(
given_basetemp=config.option.basetemp,
trace=config.trace.get("tmpdir"),
retention_count=count,
retention_policy=policy,
_ispytest=True,
)
def _ensure_relative_to_basetemp(self, basename: str) -> str:
basename = os.path.normpath(basename)
if (self.getbasetemp() / basename).resolve().parent != self.getbasetemp():
raise ValueError(f"{basename} is not a normalized and relative path")
return basename
[docs]
def mktemp(self, basename: str, numbered: bool = True) -> Path:
"""Create a new temporary directory managed by the factory.
:param basename:
Directory base name, must be a relative path.
:param numbered:
If ``True``, ensure the directory is unique by adding a numbered
suffix greater than any existing one: ``basename="foo-"`` and ``numbered=True``
means that this function will create directories named ``"foo-0"``,
``"foo-1"``, ``"foo-2"`` and so on.
:returns:
The path to the new directory.
"""
basename = self._ensure_relative_to_basetemp(basename)
if not numbered:
p = self.getbasetemp().joinpath(basename)
p.mkdir(mode=0o700)
else:
p = make_numbered_dir(root=self.getbasetemp(), prefix=basename, mode=0o700)
self._trace("mktemp", p)
return p
[docs]
def getbasetemp(self) -> Path:
"""Return the base temporary directory, creating it if needed.
:returns:
The base temporary directory.
"""
if self._basetemp is not None:
return self._basetemp
if self._given_basetemp is not None:
basetemp = self._given_basetemp
if basetemp.exists():
rm_rf(basetemp)
basetemp.mkdir(mode=0o700)
basetemp = basetemp.resolve()
else:
from_env = os.environ.get("PYTEST_DEBUG_TEMPROOT")
temproot = Path(from_env or tempfile.gettempdir()).resolve()
user = get_user() or "unknown"
# use a sub-directory in the temproot to speed-up
# make_numbered_dir() call
rootdir = temproot.joinpath(f"pytest-of-{user}")
try:
rootdir.mkdir(mode=0o700, exist_ok=True)
except OSError:
# getuser() likely returned illegal characters for the platform, use unknown back off mechanism
rootdir = temproot.joinpath("pytest-of-unknown")
rootdir.mkdir(mode=0o700, exist_ok=True)
# Because we use exist_ok=True with a predictable name, make sure
# we are the owners, to prevent any funny business (on unix, where
# temproot is usually shared).
# Also, to keep things private, fixup any world-readable temp
# rootdir's permissions. Historically 0o755 was used, so we can't
# just error out on this, at least for a while.
uid = get_user_id()
if uid is not None:
rootdir_stat = rootdir.stat()
if rootdir_stat.st_uid != uid:
raise OSError(
f"The temporary directory {rootdir} is not owned by the current user. "
"Fix this and try again."
)
if (rootdir_stat.st_mode & 0o077) != 0:
os.chmod(rootdir, rootdir_stat.st_mode & ~0o077)
keep = self._retention_count
if self._retention_policy == "none":
keep = 0
basetemp = make_numbered_dir_with_cleanup(
prefix="pytest-",
root=rootdir,
keep=keep,
lock_timeout=LOCK_TIMEOUT,
mode=0o700,
)
assert basetemp is not None, basetemp
self._basetemp = basetemp
self._trace("new basetemp", basetemp)
return basetemp
def get_user() -> Optional[str]:
"""Return the current user name, or None if getuser() does not work
in the current environment (see #1010)."""
try:
# In some exotic environments, getpass may not be importable.
import getpass
return getpass.getuser()
except (ImportError, OSError, KeyError):
return None
def pytest_configure(config: Config) -> None:
"""Create a TempPathFactory and attach it to the config object.
This is to comply with existing plugins which expect the handler to be
available at pytest_configure time, but ideally should be moved entirely
to the tmp_path_factory session fixture.
"""
mp = MonkeyPatch()
config.add_cleanup(mp.undo)
_tmp_path_factory = TempPathFactory.from_config(config, _ispytest=True)
mp.setattr(config, "_tmp_path_factory", _tmp_path_factory, raising=False)
def pytest_addoption(parser: Parser) -> None:
parser.addini(
"tmp_path_retention_count",
help="How many sessions should we keep the `tmp_path` directories, according to `tmp_path_retention_policy`.",
default=3,
)
parser.addini(
"tmp_path_retention_policy",
help="Controls which directories created by the `tmp_path` fixture are kept around, based on test outcome. "
"(all/failed/none)",
default="all",
)
@fixture(scope="session")
def tmp_path_factory(request: FixtureRequest) -> TempPathFactory:
"""Return a :class:`pytest.TempPathFactory` instance for the test session."""
# Set dynamically by pytest_configure() above.
return request.config._tmp_path_factory # type: ignore
def _mk_tmp(request: FixtureRequest, factory: TempPathFactory) -> Path:
name = request.node.name
name = re.sub(r"[\W]", "_", name)
MAXVAL = 30
name = name[:MAXVAL]
return factory.mktemp(name, numbered=True)
[docs]
@fixture
def tmp_path(
request: FixtureRequest, tmp_path_factory: TempPathFactory
) -> Generator[Path, None, None]:
"""Return a temporary directory path object which is unique to each test
function invocation, created as a sub directory of the base temporary
directory.
By default, a new base temporary directory is created each test session,
and old bases are removed after 3 sessions, to aid in debugging.
This behavior can be configured with :confval:`tmp_path_retention_count` and
:confval:`tmp_path_retention_policy`.
If ``--basetemp`` is used then it is cleared each session. See
:ref:`temporary directory location and retention`.
The returned object is a :class:`pathlib.Path` object.
"""
path = _mk_tmp(request, tmp_path_factory)
yield path
# Remove the tmpdir if the policy is "failed" and the test passed.
tmp_path_factory: TempPathFactory = request.session.config._tmp_path_factory # type: ignore
policy = tmp_path_factory._retention_policy
result_dict = request.node.stash[tmppath_result_key]
if policy == "failed" and result_dict.get("call", True):
# We do a "best effort" to remove files, but it might not be possible due to some leaked resource,
# permissions, etc, in which case we ignore it.
rmtree(path, ignore_errors=True)
del request.node.stash[tmppath_result_key]
def pytest_sessionfinish(session, exitstatus: Union[int, ExitCode]):
"""After each session, remove base directory if all the tests passed,
the policy is "failed", and the basetemp is not specified by a user.
"""
tmp_path_factory: TempPathFactory = session.config._tmp_path_factory
basetemp = tmp_path_factory._basetemp
if basetemp is None:
return
policy = tmp_path_factory._retention_policy
if (
exitstatus == 0
and policy == "failed"
and tmp_path_factory._given_basetemp is None
):
if basetemp.is_dir():
# We do a "best effort" to remove files, but it might not be possible due to some leaked resource,
# permissions, etc, in which case we ignore it.
rmtree(basetemp, ignore_errors=True)
# Remove dead symlinks.
if basetemp.is_dir():
cleanup_dead_symlinks(basetemp)
@hookimpl(wrapper=True, tryfirst=True)
def pytest_runtest_makereport(
item: Item, call
) -> Generator[None, TestReport, TestReport]:
rep = yield
assert rep.when is not None
empty: Dict[str, bool] = {}
item.stash.setdefault(tmppath_result_key, empty)[rep.when] = rep.passed
return rep
