From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Miro=20Hron=C4=8Dok?= Date: Mon, 15 Feb 2021 12:19:27 +0100 Subject: [PATCH] 00251: Change user install location MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Set values of base and platbase in sysconfig from /usr to /usr/local when RPM build is not detected to make pip and similar tools install into separate location. Fedora Change: https://fedoraproject.org/wiki/Changes/Making_sudo_pip_safe Downstream only. We've tried to rework in Fedora 36/Python 3.10 to follow https://bugs.python.org/issue43976 but we have identified serious problems with that approach, see https://bugzilla.redhat.com/2026979 or https://bugzilla.redhat.com/2097183 pypa/distutils integration: https://github.com/pypa/distutils/pull/70 Co-authored-by: Petr Viktorin Co-authored-by: Miro Hrončok Co-authored-by: Michal Cyprian Co-authored-by: Lumír Balhar --- Lib/sysconfig/__init__.py | 57 +++++++++++++++++++++++++++++++++++++++++---- Lib/test/test_sysconfig.py | 17 +++++++++++-- 2 files changed, 67 insertions(+), 7 deletions(-) --- a/Lib/sysconfig/__init__.py +++ b/Lib/sysconfig/__init__.py @@ -106,6 +106,11 @@ if os.name == 'nt': else: _INSTALL_SCHEMES['venv'] = _INSTALL_SCHEMES['posix_venv'] +# For a brief period of time in the Fedora 36 life cycle, +# this installation scheme existed and was documented in the release notes. +# For backwards compatibility, we keep it here (at least on 3.10 and 3.11). +_INSTALL_SCHEMES['rpm_prefix'] = _INSTALL_SCHEMES['posix_prefix'] + def _get_implementation(): return 'Python' @@ -167,13 +172,28 @@ if _HAS_USER_BASE: }, } +# This is used by distutils.command.install in the stdlib +# as well as pypa/distutils (e.g. bundled in setuptools). +# The self.prefix value is set to sys.prefix + /local/ +# if neither RPM build nor virtual environment is +# detected to make distutils install packages +# into the separate location. +# https://fedoraproject.org/wiki/Changes/Making_sudo_pip_safe +if (not (hasattr(sys, 'real_prefix') or + sys.prefix != sys.base_prefix) and + 'RPM_BUILD_ROOT' not in os.environ): + _prefix_addition = '/local' + + _SCHEME_KEYS = ('stdlib', 'platstdlib', 'purelib', 'platlib', 'include', 'scripts', 'data') _PY_VERSION = sys.version.split()[0] _PY_VERSION_SHORT = f'{sys.version_info[0]}.{sys.version_info[1]}' _PY_VERSION_SHORT_NO_DOT = f'{sys.version_info[0]}{sys.version_info[1]}' +_PREFIX = os.path.normpath(sys.prefix) _BASE_PREFIX = os.path.normpath(sys.base_prefix) +_EXEC_PREFIX = os.path.normpath(sys.exec_prefix) _BASE_EXEC_PREFIX = os.path.normpath(sys.base_exec_prefix) # Mutex guarding initialization of _CONFIG_VARS. _CONFIG_VARS_LOCK = threading.RLock() @@ -259,11 +279,40 @@ def _extend_dict(target_dict, other_dict target_dict[key] = value +_CONFIG_VARS_LOCAL = None + + +def _config_vars_local(): + # This function returns the config vars with prefixes amended to /usr/local + # https://fedoraproject.org/wiki/Changes/Making_sudo_pip_safe + global _CONFIG_VARS_LOCAL + if _CONFIG_VARS_LOCAL is None: + _CONFIG_VARS_LOCAL = dict(get_config_vars()) + _CONFIG_VARS_LOCAL['base'] = '/usr/local' + _CONFIG_VARS_LOCAL['platbase'] = '/usr/local' + return _CONFIG_VARS_LOCAL + + def _expand_vars(scheme, vars): res = {} if vars is None: vars = {} - _extend_dict(vars, get_config_vars()) + + # when we are not in a virtual environment or an RPM build + # we change '/usr' to '/usr/local' + # to avoid surprises, we explicitly check for the /usr/ prefix + # Python virtual environments have different prefixes + # we only do this for posix_prefix, not to mangle the venv scheme + # posix_prefix is used by sudo pip install + # we only change the defaults here, so explicit --prefix will take precedence + # https://fedoraproject.org/wiki/Changes/Making_sudo_pip_safe + if (scheme == 'posix_prefix' and + _PREFIX == '/usr' and + 'RPM_BUILD_ROOT' not in os.environ): + _extend_dict(vars, _config_vars_local()) + else: + _extend_dict(vars, get_config_vars()) + if os.name == 'nt': # On Windows we want to substitute 'lib' for schemes rather # than the native value (without modifying vars, in case it @@ -464,10 +513,8 @@ def _init_config_vars(): # Normalized versions of prefix and exec_prefix are handy to have; # in fact, these are the standard versions used most places in the # Distutils. - _PREFIX = os.path.normpath(sys.prefix) - _EXEC_PREFIX = os.path.normpath(sys.exec_prefix) - _CONFIG_VARS['prefix'] = _PREFIX # FIXME: This gets overwriten by _init_posix. - _CONFIG_VARS['exec_prefix'] = _EXEC_PREFIX # FIXME: This gets overwriten by _init_posix. + _CONFIG_VARS['prefix'] = _PREFIX + _CONFIG_VARS['exec_prefix'] = _EXEC_PREFIX _CONFIG_VARS['py_version'] = _PY_VERSION _CONFIG_VARS['py_version_short'] = _PY_VERSION_SHORT _CONFIG_VARS['py_version_nodot'] = _PY_VERSION_SHORT_NO_DOT --- a/Lib/test/test_sysconfig.py +++ b/Lib/test/test_sysconfig.py @@ -130,8 +130,19 @@ class TestSysConfig(unittest.TestCase): for scheme in _INSTALL_SCHEMES: for name in _INSTALL_SCHEMES[scheme]: expected = _INSTALL_SCHEMES[scheme][name].format(**config_vars) + tested = get_path(name, scheme) + # https://fedoraproject.org/wiki/Changes/Making_sudo_pip_safe + if tested.startswith('/usr/local'): + # /usr/local should only be used in posix_prefix + self.assertEqual(scheme, 'posix_prefix') + # Fedora CI runs tests for venv and virtualenv that check for other prefixes + self.assertEqual(sys.prefix, '/usr') + # When building the RPM of Python, %check runs this with RPM_BUILD_ROOT set + # Fedora CI runs this with RPM_BUILD_ROOT unset + self.assertNotIn('RPM_BUILD_ROOT', os.environ) + tested = tested.replace('/usr/local', '/usr') self.assertEqual( - os.path.normpath(get_path(name, scheme)), + os.path.normpath(tested), os.path.normpath(expected), ) @@ -386,7 +397,7 @@ class TestSysConfig(unittest.TestCase): self.assertTrue(os.path.isfile(config_h), config_h) def test_get_scheme_names(self): - wanted = ['nt', 'posix_home', 'posix_prefix', 'posix_venv', 'nt_venv', 'venv'] + wanted = ['nt', 'posix_home', 'posix_prefix', 'posix_venv', 'nt_venv', 'venv', 'rpm_prefix'] if HAS_USER_BASE: wanted.extend(['nt_user', 'osx_framework_user', 'posix_user']) self.assertEqual(get_scheme_names(), tuple(sorted(wanted))) @@ -398,6 +409,8 @@ class TestSysConfig(unittest.TestCase): cmd = "-c", "import sysconfig; print(sysconfig.get_platform())" self.assertEqual(py.call_real(*cmd), py.call_link(*cmd)) + @unittest.skipIf('RPM_BUILD_ROOT' not in os.environ, + "Test doesn't expect Fedora's paths") def test_user_similar(self): # Issue #8759: make sure the posix scheme for the users # is similar to the global posix_prefix one