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From 2c3f3a590ddfc151a456b44a5f96f0f603d178e9 Mon Sep 17 00:00:00 2001
From: Lumir Balhar <lbalhar@redhat.com>
Date: Wed, 16 Feb 2022 08:36:21 +0100
Subject: [PATCH] Prevent removing of the system packages installed under
/usr/lib when pip install --upgrade is executed.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Resolves: rhbz#1550368
Co-Authored-By: Michal Cyprian <m.cyprian@gmail.com>
Co-Authored-By: Victor Stinner <vstinner@redhat.com>
Co-Authored-By: Petr Viktorin <pviktori@redhat.com>
Co-Authored-By: Lumir Balhar <lbalhar@redhat.com>
Co-Authored-By: Miro Hrončok <miro@hroncok.cz>
Co-Authored-By: Karolina Surma <ksurma@redhat.com>
---
src/pip/_internal/metadata/base.py | 12 +++++++++++-
src/pip/_internal/req/req_install.py | 2 +-
src/pip/_internal/resolution/legacy/resolver.py | 4 +++-
src/pip/_internal/resolution/resolvelib/factory.py | 12 ++++++++++++
4 files changed, 27 insertions(+), 3 deletions(-)
diff --git a/src/pip/_internal/metadata/base.py b/src/pip/_internal/metadata/base.py
index 151fd6d..f9109cd 100644
--- a/src/pip/_internal/metadata/base.py
+++ b/src/pip/_internal/metadata/base.py
@@ -28,7 +28,7 @@ from pip._vendor.packaging.utils import NormalizedName
from pip._vendor.packaging.version import LegacyVersion, Version
from pip._internal.exceptions import NoneMetadataError
-from pip._internal.locations import site_packages, user_site
+from pip._internal.locations import get_scheme, site_packages, user_site
from pip._internal.models.direct_url import (
DIRECT_URL_METADATA_NAME,
DirectUrl,
@@ -560,6 +560,16 @@ class BaseDistribution(Protocol):
for extra in self._iter_egg_info_extras():
metadata["Provides-Extra"] = extra
+ @property
+ def in_install_path(self) -> bool:
+ """
+ Return True if given Distribution is installed in
+ path matching distutils_scheme layout.
+ """
+ norm_path = normalize_path(self.installed_location)
+ return norm_path.startswith(normalize_path(
+ get_scheme("").purelib.split('python')[0]))
+
class BaseEnvironment:
"""An environment containing distributions to introspect."""
diff --git a/src/pip/_internal/req/req_install.py b/src/pip/_internal/req/req_install.py
index a1e376c..ed7facf 100644
--- a/src/pip/_internal/req/req_install.py
+++ b/src/pip/_internal/req/req_install.py
@@ -416,7 +416,7 @@ class InstallRequirement:
f"lack sys.path precedence to {existing_dist.raw_name} "
f"in {existing_dist.location}"
)
- else:
+ elif existing_dist.in_install_path:
self.should_reinstall = True
else:
if self.editable:
diff --git a/src/pip/_internal/resolution/legacy/resolver.py b/src/pip/_internal/resolution/legacy/resolver.py
index fb49d41..040f2c1 100644
--- a/src/pip/_internal/resolution/legacy/resolver.py
+++ b/src/pip/_internal/resolution/legacy/resolver.py
@@ -325,7 +325,9 @@ class Resolver(BaseResolver):
"""
# Don't uninstall the conflict if doing a user install and the
# conflict is not a user install.
- if not self.use_user_site or req.satisfied_by.in_usersite:
+ if ((not self.use_user_site
+ or req.satisfied_by.in_usersite)
+ and req.satisfied_by.in_install_path):
req.should_reinstall = True
req.satisfied_by = None
diff --git a/src/pip/_internal/resolution/resolvelib/factory.py b/src/pip/_internal/resolution/resolvelib/factory.py
index a4c24b5..e7e2da9 100644
--- a/src/pip/_internal/resolution/resolvelib/factory.py
+++ b/src/pip/_internal/resolution/resolvelib/factory.py
@@ -1,6 +1,8 @@
import contextlib
import functools
import logging
+import sys
+import sysconfig
from typing import (
TYPE_CHECKING,
Dict,
@@ -549,6 +551,16 @@ class Factory:
if dist is None: # Not installed, no uninstallation required.
return None
+ # Prevent uninstalling packages from /usr
+ try:
+ if dist.installed_location in (
+ sysconfig.get_path('purelib', scheme='rpm_prefix', vars={'base': sys.base_prefix}),
+ sysconfig.get_path('platlib', scheme='rpm_prefix', vars={'base': sys.base_prefix}),
+ ):
+ return None
+ except KeyError: # this Python doesn't have 'rpm_prefix' scheme yet
+ pass
+
# We're installing into global site. The current installation must
# be uninstalled, no matter it's in global or user site, because the
# user site installation has precedence over global.
--
2.35.3