Detect paths not to uninstall from via sysconfig's rpm_prefix install scheme

python-pip.spec

@@ -22,7 +22,7 @@
 
 Name:           python-%{srcname}
 Version:        %{base_version}%{?prerel:~%{prerel}}
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        A tool for installing and managing Python packages
 
 # We bundle a lot of libraries with pip, which itself is under MIT license.
@@ -70,6 +70,7 @@ BuildRequires:  python-wheel-wheel
 # Prevent removing of the system packages installed under /usr/lib
 # when pip install -U is executed.
 # https://bugzilla.redhat.com/show_bug.cgi?id=1550368#c24
+# Could be replaced with https://www.python.org/dev/peps/pep-0668/
 Patch3:         remove-existing-dist-only-if-path-conflicts.patch
 
 # Use the system level root certificate instead of the one bundled in certifi
@@ -203,6 +204,12 @@ Recommends:     python%{python3_pkgversion}-setuptools
 Provides:       pip = %{version}-%{release}
 Conflicts:      python-pip < %{version}-%{release}
 
+# The python3.10 version that added the rpm_prefix sysconfig install scheme
+# This pip can also function with the previous version,
+# but it would remove RPM-installed packages during sudo pip install --upgrade.
+Requires:       python3-libs >= 3.10.0-2
+
+
 %{crypt_compat_recommends 3}
 
 %description -n python%{python3_pkgversion}-%{srcname}
@@ -391,6 +398,9 @@ pytest_k='not completion and
 %{python_wheeldir}/%{python_wheelname}
 
 %changelog
+* Thu Sep 23 2021 Miro Hrončok <mhroncok@redhat.com> - 21.2.3-3
+- Detect paths not to uninstall from via sysconfig's rpm_prefix install scheme
+
 * Mon Aug 16 2021 Miro Hrončok <mhroncok@redhat.com> - 21.2.3-2
 - Fix broken uninstallation by a bogus downstream patch
 

remove-existing-dist-only-if-path-conflicts.patch

@@ -1,10 +1,13 @@
-From aca0c9df4ef54f70a3fedb07f4faac463f88a331 Mon Sep 17 00:00:00 2001
+From 03fe2f1a674d8a8dfbd7da5bef2a6ae123670092 Mon Sep 17 00:00:00 2001
 From: Karolina Surma <ksurma@redhat.com>
 Date: Mon, 10 May 2021 18:16:20 +0200
 Subject: [PATCH] Prevent removing of the system packages installed under
  /usr/lib
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
 
-when pip install -U is executed.
+when pip install --upgrade is executed.
 
 Resolves: rhbz#1550368
 
@@ -16,9 +19,9 @@ Co-Authored-By: Miro Hrončok <miro@hroncok.cz>
 ---
  src/pip/_internal/req/req_install.py               |  3 ++-
  src/pip/_internal/resolution/legacy/resolver.py    |  5 ++++-
- src/pip/_internal/resolution/resolvelib/factory.py | 10 ++++++++++
+ src/pip/_internal/resolution/resolvelib/factory.py | 13 +++++++++++++
  src/pip/_internal/utils/misc.py                    | 11 +++++++++++
- 4 files changed, 27 insertions(+), 2 deletions(-)
+ 4 files changed, 30 insertions(+), 2 deletions(-)
 
 diff --git a/src/pip/_internal/req/req_install.py b/src/pip/_internal/req/req_install.py
 index 4c58cdb..3570e17 100644
@@ -65,14 +68,14 @@ index 4df8f7e..dda2292 100644
          req.satisfied_by = None
  
 diff --git a/src/pip/_internal/resolution/resolvelib/factory.py b/src/pip/_internal/resolution/resolvelib/factory.py
-index e7fd344..555e657 100644
+index e7fd344..73b83fb 100644
 --- a/src/pip/_internal/resolution/resolvelib/factory.py
 +++ b/src/pip/_internal/resolution/resolvelib/factory.py
 @@ -1,6 +1,7 @@
  import contextlib
  import functools
  import logging
-+import sys
++import sysconfig
  from typing import (
      TYPE_CHECKING,
      Dict,
@@ -92,16 +95,19 @@ index e7fd344..555e657 100644
  from pip._internal.utils.virtualenv import running_under_virtualenv
  
  from .base import Candidate, CandidateVersion, Constraint, Requirement
-@@ -525,6 +528,13 @@ class Factory:
+@@ -525,6 +528,16 @@ class Factory:
          if dist is None:  # Not installed, no uninstallation required.
              return None
  
 +        # Prevent uninstalling packages from /usr
++        try:
 +            if dist_location(dist._dist) in (
-+                get_scheme('', prefix=sys.base_prefix).purelib,
++                    sysconfig.get_path('purelib', scheme='rpm_prefix'),
-+                get_scheme('', prefix=sys.base_prefix).platlib,
++                    sysconfig.get_path('platlib', scheme='rpm_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