C///

\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5�\D6?\BD�\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2� \00$\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4�\E9\F2�\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// import contextlib import hashlib import logging import os from types import TracebackType from typing import Dict, Generator, Optional, Type, Union from pip._internal.req.req_install import InstallRequirement from pip._internal.utils.temp_dir import TempDirectory logger = logging.getLogger(__name__) @contextlib.contextmanager def update_env_context_manager(**changes: str) -> Generator[None, None, None]: target = os.environ # Save values from the target and change them. non_existent_marker = object() saved_values: Dict[str, Union[object, str]] = {} for name, new_value in changes.items(): try: saved_values[name] = target[name] except KeyError: saved_values[name] = non_existent_marker target[name] = new_value try: yield finally: # Restore original values in the target. for name, original_value in saved_values.items(): if original_value is non_existent_marker: del target[name] else: assert isinstance(original_value, str) # for mypy target[name] = original_value @contextlib.contextmanager def get_build_tracker() -> Generator["BuildTracker", None, None]: root = os.environ.get("PIP_BUILD_TRACKER") with contextlib.ExitStack() as ctx: if root is None: root = ctx.enter_context(TempDirectory(kind="build-tracker")).path ctx.enter_context(update_env_context_manager(PIP_BUILD_TRACKER=root)) logger.debug("Initialized build tracking at %s", root) with BuildTracker(root) as tracker: yield tracker class TrackerId(str): """Uniquely identifying string provided to the build tracker.""" class BuildTracker: """Ensure that an sdist cannot request itself as a setup requirement. When an sdist is prepared, it identifies its setup requirements in the context of ``BuildTracker.track()``. If a requirement shows up recursively, this raises an exception. This stops fork bombs embedded in malicious packages.""" def __init__(self, root: str) -> None: self._root = root self._entries: Dict[TrackerId, InstallRequirement] = {} logger.debug("Created build tracker: %s", self._root) def __enter__(self) -> "BuildTracker": logger.debug("Entered build tracker: %s", self._root) return self def __exit__( self, exc_type: Optional[Type[BaseException]], exc_val: Optional[BaseException], exc_tb: Optional[TracebackType], ) -> None: self.cleanup() def _entry_path(self, key: TrackerId) -> str: hashed = hashlib.sha224(key.encode()).hexdigest() return os.path.join(self._root, hashed) def add(self, req: InstallRequirement, key: TrackerId) -> None: """Add an InstallRequirement to build tracking.""" # Get the file to write information about this requirement. entry_path = self._entry_path(key)