651 lines
24 KiB
Python
651 lines
24 KiB
Python
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import functools
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import os
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import sys
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import sysconfig
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from importlib.util import cache_from_source
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from typing import Any, Callable, Dict, Generator, Iterable, List, Optional, Set, Tuple
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from pip._internal.exceptions import UninstallationError
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from pip._internal.locations import get_bin_prefix, get_bin_user
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from pip._internal.metadata import BaseDistribution
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from pip._internal.utils.compat import WINDOWS
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from pip._internal.utils.egg_link import egg_link_path_from_location
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from pip._internal.utils.logging import getLogger, indent_log
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from pip._internal.utils.misc import ask, normalize_path, renames, rmtree
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from pip._internal.utils.temp_dir import AdjacentTempDirectory, TempDirectory
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from pip._internal.utils.virtualenv import running_under_virtualenv
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logger = getLogger(__name__)
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def _script_names(
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bin_dir: str, script_name: str, is_gui: bool
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) -> Generator[str, None, None]:
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"""Create the fully qualified name of the files created by
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{console,gui}_scripts for the given ``dist``.
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Returns the list of file names
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"""
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exe_name = os.path.join(bin_dir, script_name)
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yield exe_name
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if not WINDOWS:
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return
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yield f"{exe_name}.exe"
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yield f"{exe_name}.exe.manifest"
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if is_gui:
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yield f"{exe_name}-script.pyw"
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else:
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yield f"{exe_name}-script.py"
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def _unique(
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fn: Callable[..., Generator[Any, None, None]]
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) -> Callable[..., Generator[Any, None, None]]:
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@functools.wraps(fn)
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def unique(*args: Any, **kw: Any) -> Generator[Any, None, None]:
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seen: Set[Any] = set()
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for item in fn(*args, **kw):
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if item not in seen:
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seen.add(item)
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yield item
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return unique
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@_unique
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def uninstallation_paths(dist: BaseDistribution) -> Generator[str, None, None]:
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"""
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Yield all the uninstallation paths for dist based on RECORD-without-.py[co]
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Yield paths to all the files in RECORD. For each .py file in RECORD, add
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the .pyc and .pyo in the same directory.
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UninstallPathSet.add() takes care of the __pycache__ .py[co].
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If RECORD is not found, raises UninstallationError,
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with possible information from the INSTALLER file.
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https://packaging.python.org/specifications/recording-installed-packages/
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"""
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location = dist.location
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assert location is not None, "not installed"
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entries = dist.iter_declared_entries()
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if entries is None:
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msg = "Cannot uninstall {dist}, RECORD file not found.".format(dist=dist)
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installer = dist.installer
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if not installer or installer == "pip":
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dep = "{}=={}".format(dist.raw_name, dist.version)
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msg += (
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" You might be able to recover from this via: "
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"'pip install --force-reinstall --no-deps {}'.".format(dep)
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)
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else:
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msg += " Hint: The package was installed by {}.".format(installer)
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raise UninstallationError(msg)
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for entry in entries:
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path = os.path.join(location, entry)
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yield path
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if path.endswith(".py"):
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dn, fn = os.path.split(path)
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base = fn[:-3]
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path = os.path.join(dn, base + ".pyc")
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yield path
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path = os.path.join(dn, base + ".pyo")
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yield path
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def compact(paths: Iterable[str]) -> Set[str]:
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"""Compact a path set to contain the minimal number of paths
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necessary to contain all paths in the set. If /a/path/ and
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/a/path/to/a/file.txt are both in the set, leave only the
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shorter path."""
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sep = os.path.sep
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short_paths: Set[str] = set()
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for path in sorted(paths, key=len):
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should_skip = any(
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path.startswith(shortpath.rstrip("*"))
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and path[len(shortpath.rstrip("*").rstrip(sep))] == sep
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for shortpath in short_paths
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)
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if not should_skip:
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short_paths.add(path)
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return short_paths
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def compress_for_rename(paths: Iterable[str]) -> Set[str]:
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"""Returns a set containing the paths that need to be renamed.
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This set may include directories when the original sequence of paths
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included every file on disk.
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"""
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case_map = {os.path.normcase(p): p for p in paths}
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remaining = set(case_map)
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unchecked = sorted({os.path.split(p)[0] for p in case_map.values()}, key=len)
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wildcards: Set[str] = set()
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def norm_join(*a: str) -> str:
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return os.path.normcase(os.path.join(*a))
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for root in unchecked:
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if any(os.path.normcase(root).startswith(w) for w in wildcards):
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# This directory has already been handled.
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continue
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all_files: Set[str] = set()
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all_subdirs: Set[str] = set()
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for dirname, subdirs, files in os.walk(root):
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all_subdirs.update(norm_join(root, dirname, d) for d in subdirs)
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all_files.update(norm_join(root, dirname, f) for f in files)
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# If all the files we found are in our remaining set of files to
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# remove, then remove them from the latter set and add a wildcard
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# for the directory.
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if not (all_files - remaining):
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remaining.difference_update(all_files)
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wildcards.add(root + os.sep)
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return set(map(case_map.__getitem__, remaining)) | wildcards
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def compress_for_output_listing(paths: Iterable[str]) -> Tuple[Set[str], Set[str]]:
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"""Returns a tuple of 2 sets of which paths to display to user
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The first set contains paths that would be deleted. Files of a package
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are not added and the top-level directory of the package has a '*' added
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at the end - to signify that all it's contents are removed.
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The second set contains files that would have been skipped in the above
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folders.
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"""
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will_remove = set(paths)
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will_skip = set()
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# Determine folders and files
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folders = set()
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files = set()
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for path in will_remove:
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if path.endswith(".pyc"):
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continue
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if path.endswith("__init__.py") or ".dist-info" in path:
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folders.add(os.path.dirname(path))
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files.add(path)
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# probably this one https://github.com/python/mypy/issues/390
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_normcased_files = set(map(os.path.normcase, files)) # type: ignore
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folders = compact(folders)
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# This walks the tree using os.walk to not miss extra folders
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# that might get added.
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for folder in folders:
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for dirpath, _, dirfiles in os.walk(folder):
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for fname in dirfiles:
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if fname.endswith(".pyc"):
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continue
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file_ = os.path.join(dirpath, fname)
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if (
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os.path.isfile(file_)
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and os.path.normcase(file_) not in _normcased_files
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):
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# We are skipping this file. Add it to the set.
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will_skip.add(file_)
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will_remove = files | {os.path.join(folder, "*") for folder in folders}
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return will_remove, will_skip
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class StashedUninstallPathSet:
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"""A set of file rename operations to stash files while
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tentatively uninstalling them."""
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def __init__(self) -> None:
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# Mapping from source file root to [Adjacent]TempDirectory
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# for files under that directory.
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self._save_dirs: Dict[str, TempDirectory] = {}
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# (old path, new path) tuples for each move that may need
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# to be undone.
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self._moves: List[Tuple[str, str]] = []
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def _get_directory_stash(self, path: str) -> str:
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"""Stashes a directory.
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Directories are stashed adjacent to their original location if
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possible, or else moved/copied into the user's temp dir."""
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try:
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save_dir: TempDirectory = AdjacentTempDirectory(path)
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except OSError:
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save_dir = TempDirectory(kind="uninstall")
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self._save_dirs[os.path.normcase(path)] = save_dir
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return save_dir.path
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def _get_file_stash(self, path: str) -> str:
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"""Stashes a file.
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If no root has been provided, one will be created for the directory
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in the user's temp directory."""
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path = os.path.normcase(path)
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head, old_head = os.path.dirname(path), None
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save_dir = None
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while head != old_head:
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try:
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save_dir = self._save_dirs[head]
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break
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except KeyError:
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pass
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head, old_head = os.path.dirname(head), head
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else:
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# Did not find any suitable root
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head = os.path.dirname(path)
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save_dir = TempDirectory(kind="uninstall")
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self._save_dirs[head] = save_dir
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relpath = os.path.relpath(path, head)
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if relpath and relpath != os.path.curdir:
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return os.path.join(save_dir.path, relpath)
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return save_dir.path
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def stash(self, path: str) -> str:
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"""Stashes the directory or file and returns its new location.
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Handle symlinks as files to avoid modifying the symlink targets.
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"""
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path_is_dir = os.path.isdir(path) and not os.path.islink(path)
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if path_is_dir:
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new_path = self._get_directory_stash(path)
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else:
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new_path = self._get_file_stash(path)
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self._moves.append((path, new_path))
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if path_is_dir and os.path.isdir(new_path):
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# If we're moving a directory, we need to
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# remove the destination first or else it will be
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# moved to inside the existing directory.
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# We just created new_path ourselves, so it will
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# be removable.
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os.rmdir(new_path)
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renames(path, new_path)
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return new_path
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def commit(self) -> None:
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"""Commits the uninstall by removing stashed files."""
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for _, save_dir in self._save_dirs.items():
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save_dir.cleanup()
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self._moves = []
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self._save_dirs = {}
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def rollback(self) -> None:
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"""Undoes the uninstall by moving stashed files back."""
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for p in self._moves:
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logger.info("Moving to %s\n from %s", *p)
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for new_path, path in self._moves:
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try:
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logger.debug("Replacing %s from %s", new_path, path)
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if os.path.isfile(new_path) or os.path.islink(new_path):
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os.unlink(new_path)
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elif os.path.isdir(new_path):
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rmtree(new_path)
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renames(path, new_path)
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except OSError as ex:
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logger.error("Failed to restore %s", new_path)
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logger.debug("Exception: %s", ex)
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self.commit()
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@property
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def can_rollback(self) -> bool:
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return bool(self._moves)
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class UninstallPathSet:
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"""A set of file paths to be removed in the uninstallation of a
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requirement."""
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def __init__(self, dist: BaseDistribution) -> None:
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self._paths: Set[str] = set()
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self._refuse: Set[str] = set()
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self._pth: Dict[str, UninstallPthEntries] = {}
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self._dist = dist
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self._moved_paths = StashedUninstallPathSet()
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# Create local cache of normalize_path results. Creating an UninstallPathSet
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# can result in hundreds/thousands of redundant calls to normalize_path with
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# the same args, which hurts performance.
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self._normalize_path_cached = functools.lru_cache()(normalize_path)
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def _permitted(self, path: str) -> bool:
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"""
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Return True if the given path is one we are permitted to
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remove/modify, False otherwise.
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"""
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# aka is_local, but caching normalized sys.prefix
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if not running_under_virtualenv():
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return True
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return path.startswith(self._normalize_path_cached(sys.prefix))
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def add(self, path: str) -> None:
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head, tail = os.path.split(path)
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# we normalize the head to resolve parent directory symlinks, but not
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# the tail, since we only want to uninstall symlinks, not their targets
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path = os.path.join(self._normalize_path_cached(head), os.path.normcase(tail))
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if not os.path.exists(path):
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return
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if self._permitted(path):
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self._paths.add(path)
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else:
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self._refuse.add(path)
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# __pycache__ files can show up after 'installed-files.txt' is created,
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# due to imports
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if os.path.splitext(path)[1] == ".py":
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self.add(cache_from_source(path))
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def add_pth(self, pth_file: str, entry: str) -> None:
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pth_file = self._normalize_path_cached(pth_file)
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if self._permitted(pth_file):
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if pth_file not in self._pth:
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self._pth[pth_file] = UninstallPthEntries(pth_file)
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self._pth[pth_file].add(entry)
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else:
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self._refuse.add(pth_file)
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def remove(self, auto_confirm: bool = False, verbose: bool = False) -> None:
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"""Remove paths in ``self._paths`` with confirmation (unless
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``auto_confirm`` is True)."""
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||
|
|
if not self._paths:
|
||
|
|
logger.info(
|
||
|
|
"Can't uninstall '%s'. No files were found to uninstall.",
|
||
|
|
self._dist.raw_name,
|
||
|
|
)
|
||
|
|
return
|
||
|
|
|
||
|
|
dist_name_version = f"{self._dist.raw_name}-{self._dist.version}"
|
||
|
|
logger.info("Uninstalling %s:", dist_name_version)
|
||
|
|
|
||
|
|
with indent_log():
|
||
|
|
if auto_confirm or self._allowed_to_proceed(verbose):
|
||
|
|
moved = self._moved_paths
|
||
|
|
|
||
|
|
for_rename = compress_for_rename(self._paths)
|
||
|
|
|
||
|
|
for path in sorted(compact(for_rename)):
|
||
|
|
moved.stash(path)
|
||
|
|
logger.verbose("Removing file or directory %s", path)
|
||
|
|
|
||
|
|
for pth in self._pth.values():
|
||
|
|
pth.remove()
|
||
|
|
|
||
|
|
logger.info("Successfully uninstalled %s", dist_name_version)
|
||
|
|
|
||
|
|
def _allowed_to_proceed(self, verbose: bool) -> bool:
|
||
|
|
"""Display which files would be deleted and prompt for confirmation"""
|
||
|
|
|
||
|
|
def _display(msg: str, paths: Iterable[str]) -> None:
|
||
|
|
if not paths:
|
||
|
|
return
|
||
|
|
|
||
|
|
logger.info(msg)
|
||
|
|
with indent_log():
|
||
|
|
for path in sorted(compact(paths)):
|
||
|
|
logger.info(path)
|
||
|
|
|
||
|
|
if not verbose:
|
||
|
|
will_remove, will_skip = compress_for_output_listing(self._paths)
|
||
|
|
else:
|
||
|
|
# In verbose mode, display all the files that are going to be
|
||
|
|
# deleted.
|
||
|
|
will_remove = set(self._paths)
|
||
|
|
will_skip = set()
|
||
|
|
|
||
|
|
_display("Would remove:", will_remove)
|
||
|
|
_display("Would not remove (might be manually added):", will_skip)
|
||
|
|
_display("Would not remove (outside of prefix):", self._refuse)
|
||
|
|
if verbose:
|
||
|
|
_display("Will actually move:", compress_for_rename(self._paths))
|
||
|
|
|
||
|
|
return ask("Proceed (Y/n)? ", ("y", "n", "")) != "n"
|
||
|
|
|
||
|
|
def rollback(self) -> None:
|
||
|
|
"""Rollback the changes previously made by remove()."""
|
||
|
|
if not self._moved_paths.can_rollback:
|
||
|
|
logger.error(
|
||
|
|
"Can't roll back %s; was not uninstalled",
|
||
|
|
self._dist.raw_name,
|
||
|
|
)
|
||
|
|
return
|
||
|
|
logger.info("Rolling back uninstall of %s", self._dist.raw_name)
|
||
|
|
self._moved_paths.rollback()
|
||
|
|
for pth in self._pth.values():
|
||
|
|
pth.rollback()
|
||
|
|
|
||
|
|
def commit(self) -> None:
|
||
|
|
"""Remove temporary save dir: rollback will no longer be possible."""
|
||
|
|
self._moved_paths.commit()
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def from_dist(cls, dist: BaseDistribution) -> "UninstallPathSet":
|
||
|
|
dist_location = dist.location
|
||
|
|
info_location = dist.info_location
|
||
|
|
if dist_location is None:
|
||
|
|
logger.info(
|
||
|
|
"Not uninstalling %s since it is not installed",
|
||
|
|
dist.canonical_name,
|
||
|
|
)
|
||
|
|
return cls(dist)
|
||
|
|
|
||
|
|
normalized_dist_location = normalize_path(dist_location)
|
||
|
|
if not dist.local:
|
||
|
|
logger.info(
|
||
|
|
"Not uninstalling %s at %s, outside environment %s",
|
||
|
|
dist.canonical_name,
|
||
|
|
normalized_dist_location,
|
||
|
|
sys.prefix,
|
||
|
|
)
|
||
|
|
return cls(dist)
|
||
|
|
|
||
|
|
if normalized_dist_location in {
|
||
|
|
p
|
||
|
|
for p in {sysconfig.get_path("stdlib"), sysconfig.get_path("platstdlib")}
|
||
|
|
if p
|
||
|
|
}:
|
||
|
|
logger.info(
|
||
|
|
"Not uninstalling %s at %s, as it is in the standard library.",
|
||
|
|
dist.canonical_name,
|
||
|
|
normalized_dist_location,
|
||
|
|
)
|
||
|
|
return cls(dist)
|
||
|
|
|
||
|
|
paths_to_remove = cls(dist)
|
||
|
|
develop_egg_link = egg_link_path_from_location(dist.raw_name)
|
||
|
|
|
||
|
|
# Distribution is installed with metadata in a "flat" .egg-info
|
||
|
|
# directory. This means it is not a modern .dist-info installation, an
|
||
|
|
# egg, or legacy editable.
|
||
|
|
setuptools_flat_installation = (
|
||
|
|
dist.installed_with_setuptools_egg_info
|
||
|
|
and info_location is not None
|
||
|
|
and os.path.exists(info_location)
|
||
|
|
# If dist is editable and the location points to a ``.egg-info``,
|
||
|
|
# we are in fact in the legacy editable case.
|
||
|
|
and not info_location.endswith(f"{dist.setuptools_filename}.egg-info")
|
||
|
|
)
|
||
|
|
|
||
|
|
# Uninstall cases order do matter as in the case of 2 installs of the
|
||
|
|
# same package, pip needs to uninstall the currently detected version
|
||
|
|
if setuptools_flat_installation:
|
||
|
|
if info_location is not None:
|
||
|
|
paths_to_remove.add(info_location)
|
||
|
|
installed_files = dist.iter_declared_entries()
|
||
|
|
if installed_files is not None:
|
||
|
|
for installed_file in installed_files:
|
||
|
|
paths_to_remove.add(os.path.join(dist_location, installed_file))
|
||
|
|
# FIXME: need a test for this elif block
|
||
|
|
# occurs with --single-version-externally-managed/--record outside
|
||
|
|
# of pip
|
||
|
|
elif dist.is_file("top_level.txt"):
|
||
|
|
try:
|
||
|
|
namespace_packages = dist.read_text("namespace_packages.txt")
|
||
|
|
except FileNotFoundError:
|
||
|
|
namespaces = []
|
||
|
|
else:
|
||
|
|
namespaces = namespace_packages.splitlines(keepends=False)
|
||
|
|
for top_level_pkg in [
|
||
|
|
p
|
||
|
|
for p in dist.read_text("top_level.txt").splitlines()
|
||
|
|
if p and p not in namespaces
|
||
|
|
]:
|
||
|
|
path = os.path.join(dist_location, top_level_pkg)
|
||
|
|
paths_to_remove.add(path)
|
||
|
|
paths_to_remove.add(f"{path}.py")
|
||
|
|
paths_to_remove.add(f"{path}.pyc")
|
||
|
|
paths_to_remove.add(f"{path}.pyo")
|
||
|
|
|
||
|
|
elif dist.installed_by_distutils:
|
||
|
|
raise UninstallationError(
|
||
|
|
"Cannot uninstall {!r}. It is a distutils installed project "
|
||
|
|
"and thus we cannot accurately determine which files belong "
|
||
|
|
"to it which would lead to only a partial uninstall.".format(
|
||
|
|
dist.raw_name,
|
||
|
|
)
|
||
|
|
)
|
||
|
|
|
||
|
|
elif dist.installed_as_egg:
|
||
|
|
# package installed by easy_install
|
||
|
|
# We cannot match on dist.egg_name because it can slightly vary
|
||
|
|
# i.e. setuptools-0.6c11-py2.6.egg vs setuptools-0.6rc11-py2.6.egg
|
||
|
|
paths_to_remove.add(dist_location)
|
||
|
|
easy_install_egg = os.path.split(dist_location)[1]
|
||
|
|
easy_install_pth = os.path.join(
|
||
|
|
os.path.dirname(dist_location),
|
||
|
|
"easy-install.pth",
|
||
|
|
)
|
||
|
|
paths_to_remove.add_pth(easy_install_pth, "./" + easy_install_egg)
|
||
|
|
|
||
|
|
elif dist.installed_with_dist_info:
|
||
|
|
for path in uninstallation_paths(dist):
|
||
|
|
paths_to_remove.add(path)
|
||
|
|
|
||
|
|
elif develop_egg_link:
|
||
|
|
# PEP 660 modern editable is handled in the ``.dist-info`` case
|
||
|
|
# above, so this only covers the setuptools-style editable.
|
||
|
|
with open(develop_egg_link) as fh:
|
||
|
|
link_pointer = os.path.normcase(fh.readline().strip())
|
||
|
|
normalized_link_pointer = paths_to_remove._normalize_path_cached(
|
||
|
|
link_pointer
|
||
|
|
)
|
||
|
|
assert os.path.samefile(
|
||
|
|
normalized_link_pointer, normalized_dist_location
|
||
|
|
), (
|
||
|
|
f"Egg-link {develop_egg_link} (to {link_pointer}) does not match "
|
||
|
|
f"installed location of {dist.raw_name} (at {dist_location})"
|
||
|
|
)
|
||
|
|
paths_to_remove.add(develop_egg_link)
|
||
|
|
easy_install_pth = os.path.join(
|
||
|
|
os.path.dirname(develop_egg_link), "easy-install.pth"
|
||
|
|
)
|
||
|
|
paths_to_remove.add_pth(easy_install_pth, dist_location)
|
||
|
|
|
||
|
|
else:
|
||
|
|
logger.debug(
|
||
|
|
"Not sure how to uninstall: %s - Check: %s",
|
||
|
|
dist,
|
||
|
|
dist_location,
|
||
|
|
)
|
||
|
|
|
||
|
|
if dist.in_usersite:
|
||
|
|
bin_dir = get_bin_user()
|
||
|
|
else:
|
||
|
|
bin_dir = get_bin_prefix()
|
||
|
|
|
||
|
|
# find distutils scripts= scripts
|
||
|
|
try:
|
||
|
|
for script in dist.iter_distutils_script_names():
|
||
|
|
paths_to_remove.add(os.path.join(bin_dir, script))
|
||
|
|
if WINDOWS:
|
||
|
|
paths_to_remove.add(os.path.join(bin_dir, f"{script}.bat"))
|
||
|
|
except (FileNotFoundError, NotADirectoryError):
|
||
|
|
pass
|
||
|
|
|
||
|
|
# find console_scripts and gui_scripts
|
||
|
|
def iter_scripts_to_remove(
|
||
|
|
dist: BaseDistribution,
|
||
|
|
bin_dir: str,
|
||
|
|
) -> Generator[str, None, None]:
|
||
|
|
for entry_point in dist.iter_entry_points():
|
||
|
|
if entry_point.group == "console_scripts":
|
||
|
|
yield from _script_names(bin_dir, entry_point.name, False)
|
||
|
|
elif entry_point.group == "gui_scripts":
|
||
|
|
yield from _script_names(bin_dir, entry_point.name, True)
|
||
|
|
|
||
|
|
for s in iter_scripts_to_remove(dist, bin_dir):
|
||
|
|
paths_to_remove.add(s)
|
||
|
|
|
||
|
|
return paths_to_remove
|
||
|
|
|
||
|
|
|
||
|
|
class UninstallPthEntries:
|
||
|
|
def __init__(self, pth_file: str) -> None:
|
||
|
|
self.file = pth_file
|
||
|
|
self.entries: Set[str] = set()
|
||
|
|
self._saved_lines: Optional[List[bytes]] = None
|
||
|
|
|
||
|
|
def add(self, entry: str) -> None:
|
||
|
|
entry = os.path.normcase(entry)
|
||
|
|
# On Windows, os.path.normcase converts the entry to use
|
||
|
|
# backslashes. This is correct for entries that describe absolute
|
||
|
|
# paths outside of site-packages, but all the others use forward
|
||
|
|
# slashes.
|
||
|
|
# os.path.splitdrive is used instead of os.path.isabs because isabs
|
||
|
|
# treats non-absolute paths with drive letter markings like c:foo\bar
|
||
|
|
# as absolute paths. It also does not recognize UNC paths if they don't
|
||
|
|
# have more than "\\sever\share". Valid examples: "\\server\share\" or
|
||
|
|
# "\\server\share\folder".
|
||
|
|
if WINDOWS and not os.path.splitdrive(entry)[0]:
|
||
|
|
entry = entry.replace("\\", "/")
|
||
|
|
self.entries.add(entry)
|
||
|
|
|
||
|
|
def remove(self) -> None:
|
||
|
|
logger.verbose("Removing pth entries from %s:", self.file)
|
||
|
|
|
||
|
|
# If the file doesn't exist, log a warning and return
|
||
|
|
if not os.path.isfile(self.file):
|
||
|
|
logger.warning("Cannot remove entries from nonexistent file %s", self.file)
|
||
|
|
return
|
||
|
|
with open(self.file, "rb") as fh:
|
||
|
|
# windows uses '\r\n' with py3k, but uses '\n' with py2.x
|
||
|
|
lines = fh.readlines()
|
||
|
|
self._saved_lines = lines
|
||
|
|
if any(b"\r\n" in line for line in lines):
|
||
|
|
endline = "\r\n"
|
||
|
|
else:
|
||
|
|
endline = "\n"
|
||
|
|
# handle missing trailing newline
|
||
|
|
if lines and not lines[-1].endswith(endline.encode("utf-8")):
|
||
|
|
lines[-1] = lines[-1] + endline.encode("utf-8")
|
||
|
|
for entry in self.entries:
|
||
|
|
try:
|
||
|
|
logger.verbose("Removing entry: %s", entry)
|
||
|
|
lines.remove((entry + endline).encode("utf-8"))
|
||
|
|
except ValueError:
|
||
|
|
pass
|
||
|
|
with open(self.file, "wb") as fh:
|
||
|
|
fh.writelines(lines)
|
||
|
|
|
||
|
|
def rollback(self) -> bool:
|
||
|
|
if self._saved_lines is None:
|
||
|
|
logger.error("Cannot roll back changes to %s, none were made", self.file)
|
||
|
|
return False
|
||
|
|
logger.debug("Rolling %s back to previous state", self.file)
|
||
|
|
with open(self.file, "wb") as fh:
|
||
|
|
fh.writelines(self._saved_lines)
|
||
|
|
return True
|