mirror of https://github.com/pypa/pip
461 lines
16 KiB
Python
461 lines
16 KiB
Python
from __future__ import absolute_import
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import csv
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import functools
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import logging
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import os
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import sys
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import sysconfig
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from pip._vendor import pkg_resources
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from pip._internal.compat import WINDOWS, cache_from_source, uses_pycache
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from pip._internal.exceptions import UninstallationError
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from pip._internal.locations import bin_py, bin_user
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from pip._internal.utils.logging import indent_log
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from pip._internal.utils.misc import (
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FakeFile, ask, dist_in_usersite, dist_is_local, egg_link_path, is_local,
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normalize_path, renames,
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)
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from pip._internal.utils.temp_dir import TempDirectory
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logger = logging.getLogger(__name__)
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def _script_names(dist, script_name, is_gui):
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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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if dist_in_usersite(dist):
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bin_dir = bin_user
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else:
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bin_dir = bin_py
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exe_name = os.path.join(bin_dir, script_name)
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paths_to_remove = [exe_name]
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if WINDOWS:
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paths_to_remove.append(exe_name + '.exe')
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paths_to_remove.append(exe_name + '.exe.manifest')
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if is_gui:
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paths_to_remove.append(exe_name + '-script.pyw')
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else:
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paths_to_remove.append(exe_name + '-script.py')
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return paths_to_remove
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def _unique(fn):
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@functools.wraps(fn)
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def unique(*args, **kw):
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seen = 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):
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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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"""
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r = csv.reader(FakeFile(dist.get_metadata_lines('RECORD')))
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for row in r:
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path = os.path.join(dist.location, row[0])
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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):
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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()
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for path in sorted(paths, key=len):
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should_add = any(
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path.startswith(shortpath.rstrip("*")) and
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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_add:
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short_paths.add(path)
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return short_paths
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def compress_for_output_listing(paths):
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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 = list(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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_normcased_files = set(map(os.path.normcase, files))
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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 (os.path.isfile(file_) and
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os.path.normcase(file_) not in _normcased_files):
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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 | {
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os.path.join(folder, "*") for folder in folders
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}
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return will_remove, will_skip
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class UninstallPathSet(object):
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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):
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self.paths = set()
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self._refuse = set()
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self.pth = {}
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self.dist = dist
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self.save_dir = TempDirectory(kind="uninstall")
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self._moved_paths = []
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def _permitted(self, path):
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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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return is_local(path)
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def add(self, path):
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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(normalize_path(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' and uses_pycache:
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self.add(cache_from_source(path))
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def add_pth(self, pth_file, entry):
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pth_file = normalize_path(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 _stash(self, path):
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return os.path.join(
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self.save_dir.path, os.path.splitdrive(path)[1].lstrip(os.path.sep)
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)
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def remove(self, auto_confirm=False, verbose=False):
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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:
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logger.info(
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"Can't uninstall '%s'. No files were found to uninstall.",
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self.dist.project_name,
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)
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return
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dist_name_version = (
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self.dist.project_name + "-" + self.dist.version
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)
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logger.info('Uninstalling %s:', dist_name_version)
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with indent_log():
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if auto_confirm or self._allowed_to_proceed(verbose):
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self.save_dir.create()
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for path in sorted(compact(self.paths)):
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new_path = self._stash(path)
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logger.debug('Removing file or directory %s', path)
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self._moved_paths.append(path)
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renames(path, new_path)
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for pth in self.pth.values():
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pth.remove()
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logger.info('Successfully uninstalled %s', dist_name_version)
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def _allowed_to_proceed(self, verbose):
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"""Display which files would be deleted and prompt for confirmation
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"""
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def _display(msg, paths):
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if not paths:
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return
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logger.info(msg)
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with indent_log():
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for path in sorted(compact(paths)):
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logger.info(path)
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if not verbose:
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will_remove, will_skip = compress_for_output_listing(self.paths)
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else:
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# In verbose mode, display all the files that are going to be
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# deleted.
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will_remove = list(self.paths)
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will_skip = set()
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_display('Would remove:', will_remove)
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_display('Would not remove (might be manually added):', will_skip)
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_display('Would not remove (outside of prefix):', self._refuse)
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return ask('Proceed (y/n)? ', ('y', 'n')) == 'y'
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def rollback(self):
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"""Rollback the changes previously made by remove()."""
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if self.save_dir.path is None:
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logger.error(
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"Can't roll back %s; was not uninstalled",
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self.dist.project_name,
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)
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return False
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logger.info('Rolling back uninstall of %s', self.dist.project_name)
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for path in self._moved_paths:
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tmp_path = self._stash(path)
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logger.debug('Replacing %s', path)
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renames(tmp_path, path)
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for pth in self.pth.values():
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pth.rollback()
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def commit(self):
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"""Remove temporary save dir: rollback will no longer be possible."""
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self.save_dir.cleanup()
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self._moved_paths = []
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@classmethod
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def from_dist(cls, dist):
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dist_path = normalize_path(dist.location)
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if not dist_is_local(dist):
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logger.info(
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"Not uninstalling %s at %s, outside environment %s",
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dist.key,
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dist_path,
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sys.prefix,
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)
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return cls(dist)
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if dist_path in {p for p in {sysconfig.get_path("stdlib"),
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sysconfig.get_path("platstdlib")}
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if p}:
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logger.info(
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"Not uninstalling %s at %s, as it is in the standard library.",
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dist.key,
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dist_path,
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)
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return cls(dist)
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paths_to_remove = cls(dist)
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develop_egg_link = egg_link_path(dist)
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develop_egg_link_egg_info = '{}.egg-info'.format(
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pkg_resources.to_filename(dist.project_name))
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egg_info_exists = dist.egg_info and os.path.exists(dist.egg_info)
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# Special case for distutils installed package
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distutils_egg_info = getattr(dist._provider, 'path', None)
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# Uninstall cases order do matter as in the case of 2 installs of the
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# same package, pip needs to uninstall the currently detected version
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if (egg_info_exists and dist.egg_info.endswith('.egg-info') and
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not dist.egg_info.endswith(develop_egg_link_egg_info)):
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# if dist.egg_info.endswith(develop_egg_link_egg_info), we
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# are in fact in the develop_egg_link case
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paths_to_remove.add(dist.egg_info)
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if dist.has_metadata('installed-files.txt'):
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for installed_file in dist.get_metadata(
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'installed-files.txt').splitlines():
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path = os.path.normpath(
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os.path.join(dist.egg_info, installed_file)
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)
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paths_to_remove.add(path)
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# FIXME: need a test for this elif block
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# occurs with --single-version-externally-managed/--record outside
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# of pip
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elif dist.has_metadata('top_level.txt'):
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if dist.has_metadata('namespace_packages.txt'):
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namespaces = dist.get_metadata('namespace_packages.txt')
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else:
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namespaces = []
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for top_level_pkg in [
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p for p
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in dist.get_metadata('top_level.txt').splitlines()
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if p and p not in namespaces]:
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path = os.path.join(dist.location, top_level_pkg)
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paths_to_remove.add(path)
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paths_to_remove.add(path + '.py')
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paths_to_remove.add(path + '.pyc')
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paths_to_remove.add(path + '.pyo')
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elif distutils_egg_info:
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raise UninstallationError(
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"Cannot uninstall {!r}. It is a distutils installed project "
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"and thus we cannot accurately determine which files belong "
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"to it which would lead to only a partial uninstall.".format(
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dist.project_name,
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)
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)
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elif dist.location.endswith('.egg'):
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# package installed by easy_install
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# We cannot match on dist.egg_name because it can slightly vary
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# i.e. setuptools-0.6c11-py2.6.egg vs setuptools-0.6rc11-py2.6.egg
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paths_to_remove.add(dist.location)
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easy_install_egg = os.path.split(dist.location)[1]
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easy_install_pth = os.path.join(os.path.dirname(dist.location),
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'easy-install.pth')
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paths_to_remove.add_pth(easy_install_pth, './' + easy_install_egg)
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elif egg_info_exists and dist.egg_info.endswith('.dist-info'):
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for path in uninstallation_paths(dist):
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paths_to_remove.add(path)
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elif develop_egg_link:
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# develop egg
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with open(develop_egg_link, 'r') as fh:
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link_pointer = os.path.normcase(fh.readline().strip())
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assert (link_pointer == dist.location), (
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'Egg-link %s does not match installed location of %s '
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'(at %s)' % (link_pointer, dist.project_name, dist.location)
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)
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paths_to_remove.add(develop_egg_link)
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easy_install_pth = os.path.join(os.path.dirname(develop_egg_link),
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'easy-install.pth')
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paths_to_remove.add_pth(easy_install_pth, dist.location)
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else:
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logger.debug(
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'Not sure how to uninstall: %s - Check: %s',
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dist, dist.location,
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)
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# find distutils scripts= scripts
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if dist.has_metadata('scripts') and dist.metadata_isdir('scripts'):
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for script in dist.metadata_listdir('scripts'):
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if dist_in_usersite(dist):
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bin_dir = bin_user
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else:
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bin_dir = bin_py
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paths_to_remove.add(os.path.join(bin_dir, script))
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if WINDOWS:
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paths_to_remove.add(os.path.join(bin_dir, script) + '.bat')
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# find console_scripts
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_scripts_to_remove = []
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console_scripts = dist.get_entry_map(group='console_scripts')
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for name in console_scripts.keys():
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_scripts_to_remove.extend(_script_names(dist, name, False))
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# find gui_scripts
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gui_scripts = dist.get_entry_map(group='gui_scripts')
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for name in gui_scripts.keys():
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_scripts_to_remove.extend(_script_names(dist, name, True))
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for s in _scripts_to_remove:
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paths_to_remove.add(s)
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return paths_to_remove
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class UninstallPthEntries(object):
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def __init__(self, pth_file):
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if not os.path.isfile(pth_file):
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raise UninstallationError(
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"Cannot remove entries from nonexistent file %s" % pth_file
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)
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self.file = pth_file
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self.entries = set()
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self._saved_lines = None
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def add(self, entry):
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entry = os.path.normcase(entry)
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# On Windows, os.path.normcase converts the entry to use
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# backslashes. This is correct for entries that describe absolute
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# paths outside of site-packages, but all the others use forward
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# slashes.
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if WINDOWS and not os.path.splitdrive(entry)[0]:
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entry = entry.replace('\\', '/')
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self.entries.add(entry)
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def remove(self):
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logger.debug('Removing pth entries from %s:', self.file)
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with open(self.file, 'rb') as fh:
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# windows uses '\r\n' with py3k, but uses '\n' with py2.x
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lines = fh.readlines()
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self._saved_lines = lines
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if any(b'\r\n' in line for line in lines):
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endline = '\r\n'
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else:
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endline = '\n'
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# handle missing trailing newline
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if lines and not lines[-1].endswith(endline.encode("utf-8")):
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lines[-1] = lines[-1] + endline.encode("utf-8")
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for entry in self.entries:
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try:
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logger.debug('Removing entry: %s', entry)
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lines.remove((entry + endline).encode("utf-8"))
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except ValueError:
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pass
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with open(self.file, 'wb') as fh:
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fh.writelines(lines)
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def rollback(self):
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if self._saved_lines is None:
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logger.error(
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'Cannot roll back changes to %s, none were made', self.file
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)
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return False
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logger.debug('Rolling %s back to previous state', self.file)
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with open(self.file, 'wb') as fh:
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fh.writelines(self._saved_lines)
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return True
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