mirror of
https://github.com/python/cpython
synced 2024-11-05 18:12:54 +00:00
961d54c5c1
bpo-32430: Rename Modules/Setup.dist to Modules/Setup Remove the necessity to copy the former manually to the latter when updating the local source tree.
700 lines
24 KiB
Python
700 lines
24 KiB
Python
"""Access to Python's configuration information."""
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import os
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import sys
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from os.path import pardir, realpath
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__all__ = [
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'get_config_h_filename',
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'get_config_var',
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'get_config_vars',
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'get_makefile_filename',
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'get_path',
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'get_path_names',
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'get_paths',
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'get_platform',
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'get_python_version',
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'get_scheme_names',
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'parse_config_h',
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]
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_INSTALL_SCHEMES = {
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'posix_prefix': {
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'stdlib': '{installed_base}/lib/python{py_version_short}',
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'platstdlib': '{platbase}/lib/python{py_version_short}',
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'purelib': '{base}/lib/python{py_version_short}/site-packages',
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'platlib': '{platbase}/lib/python{py_version_short}/site-packages',
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'include':
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'{installed_base}/include/python{py_version_short}{abiflags}',
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'platinclude':
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'{installed_platbase}/include/python{py_version_short}{abiflags}',
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'scripts': '{base}/bin',
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'data': '{base}',
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},
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'posix_home': {
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'stdlib': '{installed_base}/lib/python',
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'platstdlib': '{base}/lib/python',
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'purelib': '{base}/lib/python',
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'platlib': '{base}/lib/python',
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'include': '{installed_base}/include/python',
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'platinclude': '{installed_base}/include/python',
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'scripts': '{base}/bin',
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'data': '{base}',
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},
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'nt': {
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'stdlib': '{installed_base}/Lib',
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'platstdlib': '{base}/Lib',
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'purelib': '{base}/Lib/site-packages',
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'platlib': '{base}/Lib/site-packages',
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'include': '{installed_base}/Include',
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'platinclude': '{installed_base}/Include',
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'scripts': '{base}/Scripts',
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'data': '{base}',
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},
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# NOTE: When modifying "purelib" scheme, update site._get_path() too.
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'nt_user': {
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'stdlib': '{userbase}/Python{py_version_nodot}',
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'platstdlib': '{userbase}/Python{py_version_nodot}',
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'purelib': '{userbase}/Python{py_version_nodot}/site-packages',
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'platlib': '{userbase}/Python{py_version_nodot}/site-packages',
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'include': '{userbase}/Python{py_version_nodot}/Include',
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'scripts': '{userbase}/Python{py_version_nodot}/Scripts',
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'data': '{userbase}',
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},
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'posix_user': {
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'stdlib': '{userbase}/lib/python{py_version_short}',
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'platstdlib': '{userbase}/lib/python{py_version_short}',
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'purelib': '{userbase}/lib/python{py_version_short}/site-packages',
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'platlib': '{userbase}/lib/python{py_version_short}/site-packages',
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'include': '{userbase}/include/python{py_version_short}',
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'scripts': '{userbase}/bin',
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'data': '{userbase}',
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},
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'osx_framework_user': {
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'stdlib': '{userbase}/lib/python',
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'platstdlib': '{userbase}/lib/python',
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'purelib': '{userbase}/lib/python/site-packages',
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'platlib': '{userbase}/lib/python/site-packages',
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'include': '{userbase}/include',
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'scripts': '{userbase}/bin',
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'data': '{userbase}',
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},
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}
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_SCHEME_KEYS = ('stdlib', 'platstdlib', 'purelib', 'platlib', 'include',
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'scripts', 'data')
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# FIXME don't rely on sys.version here, its format is an implementation detail
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# of CPython, use sys.version_info or sys.hexversion
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_PY_VERSION = sys.version.split()[0]
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_PY_VERSION_SHORT = '%d.%d' % sys.version_info[:2]
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_PY_VERSION_SHORT_NO_DOT = '%d%d' % sys.version_info[:2]
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_PREFIX = os.path.normpath(sys.prefix)
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_BASE_PREFIX = os.path.normpath(sys.base_prefix)
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_EXEC_PREFIX = os.path.normpath(sys.exec_prefix)
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_BASE_EXEC_PREFIX = os.path.normpath(sys.base_exec_prefix)
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_CONFIG_VARS = None
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_USER_BASE = None
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def _safe_realpath(path):
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try:
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return realpath(path)
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except OSError:
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return path
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if sys.executable:
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_PROJECT_BASE = os.path.dirname(_safe_realpath(sys.executable))
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else:
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# sys.executable can be empty if argv[0] has been changed and Python is
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# unable to retrieve the real program name
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_PROJECT_BASE = _safe_realpath(os.getcwd())
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if (os.name == 'nt' and
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_PROJECT_BASE.lower().endswith(('\\pcbuild\\win32', '\\pcbuild\\amd64'))):
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_PROJECT_BASE = _safe_realpath(os.path.join(_PROJECT_BASE, pardir, pardir))
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# set for cross builds
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if "_PYTHON_PROJECT_BASE" in os.environ:
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_PROJECT_BASE = _safe_realpath(os.environ["_PYTHON_PROJECT_BASE"])
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def _is_python_source_dir(d):
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for fn in ("Setup", "Setup.local"):
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if os.path.isfile(os.path.join(d, "Modules", fn)):
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return True
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return False
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_sys_home = getattr(sys, '_home', None)
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if (_sys_home and os.name == 'nt' and
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_sys_home.lower().endswith(('\\pcbuild\\win32', '\\pcbuild\\amd64'))):
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_sys_home = os.path.dirname(os.path.dirname(_sys_home))
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def is_python_build(check_home=False):
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if check_home and _sys_home:
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return _is_python_source_dir(_sys_home)
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return _is_python_source_dir(_PROJECT_BASE)
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_PYTHON_BUILD = is_python_build(True)
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if _PYTHON_BUILD:
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for scheme in ('posix_prefix', 'posix_home'):
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_INSTALL_SCHEMES[scheme]['include'] = '{srcdir}/Include'
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_INSTALL_SCHEMES[scheme]['platinclude'] = '{projectbase}/.'
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def _subst_vars(s, local_vars):
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try:
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return s.format(**local_vars)
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except KeyError:
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try:
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return s.format(**os.environ)
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except KeyError as var:
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raise AttributeError('{%s}' % var) from None
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def _extend_dict(target_dict, other_dict):
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target_keys = target_dict.keys()
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for key, value in other_dict.items():
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if key in target_keys:
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continue
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target_dict[key] = value
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def _expand_vars(scheme, vars):
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res = {}
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if vars is None:
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vars = {}
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_extend_dict(vars, get_config_vars())
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for key, value in _INSTALL_SCHEMES[scheme].items():
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if os.name in ('posix', 'nt'):
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value = os.path.expanduser(value)
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res[key] = os.path.normpath(_subst_vars(value, vars))
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return res
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def _get_default_scheme():
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if os.name == 'posix':
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# the default scheme for posix is posix_prefix
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return 'posix_prefix'
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return os.name
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# NOTE: site.py has copy of this function.
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# Sync it when modify this function.
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def _getuserbase():
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env_base = os.environ.get("PYTHONUSERBASE", None)
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if env_base:
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return env_base
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def joinuser(*args):
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return os.path.expanduser(os.path.join(*args))
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if os.name == "nt":
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base = os.environ.get("APPDATA") or "~"
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return joinuser(base, "Python")
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if sys.platform == "darwin" and sys._framework:
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return joinuser("~", "Library", sys._framework,
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"%d.%d" % sys.version_info[:2])
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return joinuser("~", ".local")
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def _parse_makefile(filename, vars=None):
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"""Parse a Makefile-style file.
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A dictionary containing name/value pairs is returned. If an
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optional dictionary is passed in as the second argument, it is
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used instead of a new dictionary.
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"""
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# Regexes needed for parsing Makefile (and similar syntaxes,
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# like old-style Setup files).
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import re
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_variable_rx = re.compile(r"([a-zA-Z][a-zA-Z0-9_]+)\s*=\s*(.*)")
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_findvar1_rx = re.compile(r"\$\(([A-Za-z][A-Za-z0-9_]*)\)")
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_findvar2_rx = re.compile(r"\${([A-Za-z][A-Za-z0-9_]*)}")
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if vars is None:
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vars = {}
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done = {}
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notdone = {}
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with open(filename, errors="surrogateescape") as f:
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lines = f.readlines()
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for line in lines:
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if line.startswith('#') or line.strip() == '':
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continue
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m = _variable_rx.match(line)
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if m:
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n, v = m.group(1, 2)
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v = v.strip()
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# `$$' is a literal `$' in make
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tmpv = v.replace('$$', '')
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if "$" in tmpv:
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notdone[n] = v
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else:
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try:
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v = int(v)
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except ValueError:
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# insert literal `$'
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done[n] = v.replace('$$', '$')
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else:
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done[n] = v
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# do variable interpolation here
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variables = list(notdone.keys())
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# Variables with a 'PY_' prefix in the makefile. These need to
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# be made available without that prefix through sysconfig.
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# Special care is needed to ensure that variable expansion works, even
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# if the expansion uses the name without a prefix.
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renamed_variables = ('CFLAGS', 'LDFLAGS', 'CPPFLAGS')
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while len(variables) > 0:
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for name in tuple(variables):
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value = notdone[name]
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m1 = _findvar1_rx.search(value)
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m2 = _findvar2_rx.search(value)
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if m1 and m2:
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m = m1 if m1.start() < m2.start() else m2
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else:
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m = m1 if m1 else m2
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if m is not None:
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n = m.group(1)
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found = True
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if n in done:
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item = str(done[n])
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elif n in notdone:
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# get it on a subsequent round
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found = False
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elif n in os.environ:
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# do it like make: fall back to environment
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item = os.environ[n]
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elif n in renamed_variables:
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if (name.startswith('PY_') and
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name[3:] in renamed_variables):
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item = ""
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elif 'PY_' + n in notdone:
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found = False
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else:
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item = str(done['PY_' + n])
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else:
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done[n] = item = ""
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if found:
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after = value[m.end():]
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value = value[:m.start()] + item + after
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if "$" in after:
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notdone[name] = value
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else:
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try:
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value = int(value)
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except ValueError:
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done[name] = value.strip()
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else:
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done[name] = value
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variables.remove(name)
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if name.startswith('PY_') \
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and name[3:] in renamed_variables:
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name = name[3:]
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if name not in done:
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done[name] = value
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else:
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# bogus variable reference (e.g. "prefix=$/opt/python");
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# just drop it since we can't deal
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done[name] = value
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variables.remove(name)
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# strip spurious spaces
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for k, v in done.items():
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if isinstance(v, str):
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done[k] = v.strip()
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# save the results in the global dictionary
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vars.update(done)
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return vars
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def get_makefile_filename():
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"""Return the path of the Makefile."""
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if _PYTHON_BUILD:
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return os.path.join(_sys_home or _PROJECT_BASE, "Makefile")
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if hasattr(sys, 'abiflags'):
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config_dir_name = 'config-%s%s' % (_PY_VERSION_SHORT, sys.abiflags)
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else:
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config_dir_name = 'config'
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if hasattr(sys.implementation, '_multiarch'):
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config_dir_name += '-%s' % sys.implementation._multiarch
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return os.path.join(get_path('stdlib'), config_dir_name, 'Makefile')
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def _get_sysconfigdata_name():
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return os.environ.get('_PYTHON_SYSCONFIGDATA_NAME',
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'_sysconfigdata_{abi}_{platform}_{multiarch}'.format(
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abi=sys.abiflags,
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platform=sys.platform,
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multiarch=getattr(sys.implementation, '_multiarch', ''),
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))
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def _generate_posix_vars():
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"""Generate the Python module containing build-time variables."""
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import pprint
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vars = {}
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# load the installed Makefile:
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makefile = get_makefile_filename()
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try:
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_parse_makefile(makefile, vars)
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except OSError as e:
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msg = "invalid Python installation: unable to open %s" % makefile
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if hasattr(e, "strerror"):
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msg = msg + " (%s)" % e.strerror
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raise OSError(msg)
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# load the installed pyconfig.h:
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config_h = get_config_h_filename()
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try:
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with open(config_h) as f:
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parse_config_h(f, vars)
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except OSError as e:
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msg = "invalid Python installation: unable to open %s" % config_h
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if hasattr(e, "strerror"):
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msg = msg + " (%s)" % e.strerror
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raise OSError(msg)
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# On AIX, there are wrong paths to the linker scripts in the Makefile
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# -- these paths are relative to the Python source, but when installed
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# the scripts are in another directory.
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if _PYTHON_BUILD:
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vars['BLDSHARED'] = vars['LDSHARED']
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# There's a chicken-and-egg situation on OS X with regards to the
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# _sysconfigdata module after the changes introduced by #15298:
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# get_config_vars() is called by get_platform() as part of the
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# `make pybuilddir.txt` target -- which is a precursor to the
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# _sysconfigdata.py module being constructed. Unfortunately,
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# get_config_vars() eventually calls _init_posix(), which attempts
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# to import _sysconfigdata, which we won't have built yet. In order
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# for _init_posix() to work, if we're on Darwin, just mock up the
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# _sysconfigdata module manually and populate it with the build vars.
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# This is more than sufficient for ensuring the subsequent call to
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# get_platform() succeeds.
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name = _get_sysconfigdata_name()
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if 'darwin' in sys.platform:
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import types
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module = types.ModuleType(name)
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module.build_time_vars = vars
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sys.modules[name] = module
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pybuilddir = 'build/lib.%s-%s' % (get_platform(), _PY_VERSION_SHORT)
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if hasattr(sys, "gettotalrefcount"):
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pybuilddir += '-pydebug'
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os.makedirs(pybuilddir, exist_ok=True)
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destfile = os.path.join(pybuilddir, name + '.py')
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with open(destfile, 'w', encoding='utf8') as f:
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f.write('# system configuration generated and used by'
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' the sysconfig module\n')
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f.write('build_time_vars = ')
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pprint.pprint(vars, stream=f)
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# Create file used for sys.path fixup -- see Modules/getpath.c
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with open('pybuilddir.txt', 'w', encoding='ascii') as f:
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f.write(pybuilddir)
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def _init_posix(vars):
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"""Initialize the module as appropriate for POSIX systems."""
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# _sysconfigdata is generated at build time, see _generate_posix_vars()
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name = _get_sysconfigdata_name()
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_temp = __import__(name, globals(), locals(), ['build_time_vars'], 0)
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build_time_vars = _temp.build_time_vars
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vars.update(build_time_vars)
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def _init_non_posix(vars):
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"""Initialize the module as appropriate for NT"""
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# set basic install directories
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vars['LIBDEST'] = get_path('stdlib')
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vars['BINLIBDEST'] = get_path('platstdlib')
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vars['INCLUDEPY'] = get_path('include')
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vars['EXT_SUFFIX'] = '.pyd'
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vars['EXE'] = '.exe'
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vars['VERSION'] = _PY_VERSION_SHORT_NO_DOT
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vars['BINDIR'] = os.path.dirname(_safe_realpath(sys.executable))
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#
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# public APIs
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#
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def parse_config_h(fp, vars=None):
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"""Parse a config.h-style file.
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A dictionary containing name/value pairs is returned. If an
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optional dictionary is passed in as the second argument, it is
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used instead of a new dictionary.
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"""
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if vars is None:
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vars = {}
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import re
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define_rx = re.compile("#define ([A-Z][A-Za-z0-9_]+) (.*)\n")
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undef_rx = re.compile("/[*] #undef ([A-Z][A-Za-z0-9_]+) [*]/\n")
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while True:
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line = fp.readline()
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if not line:
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break
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m = define_rx.match(line)
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if m:
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n, v = m.group(1, 2)
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try:
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v = int(v)
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except ValueError:
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pass
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vars[n] = v
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else:
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m = undef_rx.match(line)
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if m:
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vars[m.group(1)] = 0
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return vars
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def get_config_h_filename():
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"""Return the path of pyconfig.h."""
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if _PYTHON_BUILD:
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if os.name == "nt":
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inc_dir = os.path.join(_sys_home or _PROJECT_BASE, "PC")
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else:
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inc_dir = _sys_home or _PROJECT_BASE
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else:
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inc_dir = get_path('platinclude')
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return os.path.join(inc_dir, 'pyconfig.h')
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def get_scheme_names():
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"""Return a tuple containing the schemes names."""
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return tuple(sorted(_INSTALL_SCHEMES))
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def get_path_names():
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"""Return a tuple containing the paths names."""
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return _SCHEME_KEYS
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def get_paths(scheme=_get_default_scheme(), vars=None, expand=True):
|
|
"""Return a mapping containing an install scheme.
|
|
|
|
``scheme`` is the install scheme name. If not provided, it will
|
|
return the default scheme for the current platform.
|
|
"""
|
|
if expand:
|
|
return _expand_vars(scheme, vars)
|
|
else:
|
|
return _INSTALL_SCHEMES[scheme]
|
|
|
|
|
|
def get_path(name, scheme=_get_default_scheme(), vars=None, expand=True):
|
|
"""Return a path corresponding to the scheme.
|
|
|
|
``scheme`` is the install scheme name.
|
|
"""
|
|
return get_paths(scheme, vars, expand)[name]
|
|
|
|
|
|
def get_config_vars(*args):
|
|
"""With no arguments, return a dictionary of all configuration
|
|
variables relevant for the current platform.
|
|
|
|
On Unix, this means every variable defined in Python's installed Makefile;
|
|
On Windows it's a much smaller set.
|
|
|
|
With arguments, return a list of values that result from looking up
|
|
each argument in the configuration variable dictionary.
|
|
"""
|
|
global _CONFIG_VARS
|
|
if _CONFIG_VARS is None:
|
|
_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.
|
|
_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
|
|
_CONFIG_VARS['installed_base'] = _BASE_PREFIX
|
|
_CONFIG_VARS['base'] = _PREFIX
|
|
_CONFIG_VARS['installed_platbase'] = _BASE_EXEC_PREFIX
|
|
_CONFIG_VARS['platbase'] = _EXEC_PREFIX
|
|
_CONFIG_VARS['projectbase'] = _PROJECT_BASE
|
|
try:
|
|
_CONFIG_VARS['abiflags'] = sys.abiflags
|
|
except AttributeError:
|
|
# sys.abiflags may not be defined on all platforms.
|
|
_CONFIG_VARS['abiflags'] = ''
|
|
|
|
if os.name == 'nt':
|
|
_init_non_posix(_CONFIG_VARS)
|
|
if os.name == 'posix':
|
|
_init_posix(_CONFIG_VARS)
|
|
# For backward compatibility, see issue19555
|
|
SO = _CONFIG_VARS.get('EXT_SUFFIX')
|
|
if SO is not None:
|
|
_CONFIG_VARS['SO'] = SO
|
|
# Setting 'userbase' is done below the call to the
|
|
# init function to enable using 'get_config_var' in
|
|
# the init-function.
|
|
_CONFIG_VARS['userbase'] = _getuserbase()
|
|
|
|
# Always convert srcdir to an absolute path
|
|
srcdir = _CONFIG_VARS.get('srcdir', _PROJECT_BASE)
|
|
if os.name == 'posix':
|
|
if _PYTHON_BUILD:
|
|
# If srcdir is a relative path (typically '.' or '..')
|
|
# then it should be interpreted relative to the directory
|
|
# containing Makefile.
|
|
base = os.path.dirname(get_makefile_filename())
|
|
srcdir = os.path.join(base, srcdir)
|
|
else:
|
|
# srcdir is not meaningful since the installation is
|
|
# spread about the filesystem. We choose the
|
|
# directory containing the Makefile since we know it
|
|
# exists.
|
|
srcdir = os.path.dirname(get_makefile_filename())
|
|
_CONFIG_VARS['srcdir'] = _safe_realpath(srcdir)
|
|
|
|
# OS X platforms require special customization to handle
|
|
# multi-architecture, multi-os-version installers
|
|
if sys.platform == 'darwin':
|
|
import _osx_support
|
|
_osx_support.customize_config_vars(_CONFIG_VARS)
|
|
|
|
if args:
|
|
vals = []
|
|
for name in args:
|
|
vals.append(_CONFIG_VARS.get(name))
|
|
return vals
|
|
else:
|
|
return _CONFIG_VARS
|
|
|
|
|
|
def get_config_var(name):
|
|
"""Return the value of a single variable using the dictionary returned by
|
|
'get_config_vars()'.
|
|
|
|
Equivalent to get_config_vars().get(name)
|
|
"""
|
|
if name == 'SO':
|
|
import warnings
|
|
warnings.warn('SO is deprecated, use EXT_SUFFIX', DeprecationWarning, 2)
|
|
return get_config_vars().get(name)
|
|
|
|
|
|
def get_platform():
|
|
"""Return a string that identifies the current platform.
|
|
|
|
This is used mainly to distinguish platform-specific build directories and
|
|
platform-specific built distributions. Typically includes the OS name and
|
|
version and the architecture (as supplied by 'os.uname()'), although the
|
|
exact information included depends on the OS; on Linux, the kernel version
|
|
isn't particularly important.
|
|
|
|
Examples of returned values:
|
|
linux-i586
|
|
linux-alpha (?)
|
|
solaris-2.6-sun4u
|
|
|
|
Windows will return one of:
|
|
win-amd64 (64bit Windows on AMD64 (aka x86_64, Intel64, EM64T, etc)
|
|
win32 (all others - specifically, sys.platform is returned)
|
|
|
|
For other non-POSIX platforms, currently just returns 'sys.platform'.
|
|
|
|
"""
|
|
if os.name == 'nt':
|
|
if 'amd64' in sys.version.lower():
|
|
return 'win-amd64'
|
|
return sys.platform
|
|
|
|
if os.name != "posix" or not hasattr(os, 'uname'):
|
|
# XXX what about the architecture? NT is Intel or Alpha
|
|
return sys.platform
|
|
|
|
# Set for cross builds explicitly
|
|
if "_PYTHON_HOST_PLATFORM" in os.environ:
|
|
return os.environ["_PYTHON_HOST_PLATFORM"]
|
|
|
|
# Try to distinguish various flavours of Unix
|
|
osname, host, release, version, machine = os.uname()
|
|
|
|
# Convert the OS name to lowercase, remove '/' characters, and translate
|
|
# spaces (for "Power Macintosh")
|
|
osname = osname.lower().replace('/', '')
|
|
machine = machine.replace(' ', '_')
|
|
machine = machine.replace('/', '-')
|
|
|
|
if osname[:5] == "linux":
|
|
# At least on Linux/Intel, 'machine' is the processor --
|
|
# i386, etc.
|
|
# XXX what about Alpha, SPARC, etc?
|
|
return "%s-%s" % (osname, machine)
|
|
elif osname[:5] == "sunos":
|
|
if release[0] >= "5": # SunOS 5 == Solaris 2
|
|
osname = "solaris"
|
|
release = "%d.%s" % (int(release[0]) - 3, release[2:])
|
|
# We can't use "platform.architecture()[0]" because a
|
|
# bootstrap problem. We use a dict to get an error
|
|
# if some suspicious happens.
|
|
bitness = {2147483647:"32bit", 9223372036854775807:"64bit"}
|
|
machine += ".%s" % bitness[sys.maxsize]
|
|
# fall through to standard osname-release-machine representation
|
|
elif osname[:3] == "aix":
|
|
return "%s-%s.%s" % (osname, version, release)
|
|
elif osname[:6] == "cygwin":
|
|
osname = "cygwin"
|
|
import re
|
|
rel_re = re.compile(r'[\d.]+')
|
|
m = rel_re.match(release)
|
|
if m:
|
|
release = m.group()
|
|
elif osname[:6] == "darwin":
|
|
import _osx_support
|
|
osname, release, machine = _osx_support.get_platform_osx(
|
|
get_config_vars(),
|
|
osname, release, machine)
|
|
|
|
return "%s-%s-%s" % (osname, release, machine)
|
|
|
|
|
|
def get_python_version():
|
|
return _PY_VERSION_SHORT
|
|
|
|
|
|
def _print_dict(title, data):
|
|
for index, (key, value) in enumerate(sorted(data.items())):
|
|
if index == 0:
|
|
print('%s: ' % (title))
|
|
print('\t%s = "%s"' % (key, value))
|
|
|
|
|
|
def _main():
|
|
"""Display all information sysconfig detains."""
|
|
if '--generate-posix-vars' in sys.argv:
|
|
_generate_posix_vars()
|
|
return
|
|
print('Platform: "%s"' % get_platform())
|
|
print('Python version: "%s"' % get_python_version())
|
|
print('Current installation scheme: "%s"' % _get_default_scheme())
|
|
print()
|
|
_print_dict('Paths', get_paths())
|
|
print()
|
|
_print_dict('Variables', get_config_vars())
|
|
|
|
|
|
if __name__ == '__main__':
|
|
_main()
|