| """Access to Python's configuration information.""" |
| |
| import os |
| import sys |
| from os.path import pardir, realpath |
| |
| __all__ = [ |
| 'get_config_h_filename', |
| 'get_config_var', |
| 'get_config_vars', |
| 'get_makefile_filename', |
| 'get_path', |
| 'get_path_names', |
| 'get_paths', |
| 'get_platform', |
| 'get_python_version', |
| 'get_scheme_names', |
| 'parse_config_h', |
| ] |
| |
| # Keys for get_config_var() that are never converted to Python integers. |
| _ALWAYS_STR = { |
| 'MACOSX_DEPLOYMENT_TARGET', |
| } |
| |
| _INSTALL_SCHEMES = { |
| 'posix_prefix': { |
| 'stdlib': '{installed_base}/{platlibdir}/python{py_version_short}', |
| 'platstdlib': '{platbase}/{platlibdir}/python{py_version_short}', |
| 'purelib': '{base}/lib/python{py_version_short}/site-packages', |
| 'platlib': '{platbase}/{platlibdir}/python{py_version_short}/site-packages', |
| 'include': |
| '{installed_base}/include/python{py_version_short}{abiflags}', |
| 'platinclude': |
| '{installed_platbase}/include/python{py_version_short}{abiflags}', |
| 'scripts': '{base}/bin', |
| 'data': '{base}', |
| }, |
| 'posix_home': { |
| 'stdlib': '{installed_base}/lib/python', |
| 'platstdlib': '{base}/lib/python', |
| 'purelib': '{base}/lib/python', |
| 'platlib': '{base}/lib/python', |
| 'include': '{installed_base}/include/python', |
| 'platinclude': '{installed_base}/include/python', |
| 'scripts': '{base}/bin', |
| 'data': '{base}', |
| }, |
| 'nt': { |
| 'stdlib': '{installed_base}/Lib', |
| 'platstdlib': '{base}/Lib', |
| 'purelib': '{base}/Lib/site-packages', |
| 'platlib': '{base}/Lib/site-packages', |
| 'include': '{installed_base}/Include', |
| 'platinclude': '{installed_base}/Include', |
| 'scripts': '{base}/Scripts', |
| 'data': '{base}', |
| }, |
| } |
| |
| |
| # NOTE: site.py has copy of this function. |
| # Sync it when modify this function. |
| def _getuserbase(): |
| env_base = os.environ.get("PYTHONUSERBASE", None) |
| if env_base: |
| return env_base |
| |
| # VxWorks has no home directories |
| if sys.platform == "vxworks": |
| return None |
| |
| def joinuser(*args): |
| return os.path.expanduser(os.path.join(*args)) |
| |
| if os.name == "nt": |
| base = os.environ.get("APPDATA") or "~" |
| return joinuser(base, "Python") |
| |
| if sys.platform == "darwin" and sys._framework: |
| return joinuser("~", "Library", sys._framework, |
| f"{sys.version_info[0]}.{sys.version_info[1]}") |
| |
| return joinuser("~", ".local") |
| |
| _HAS_USER_BASE = (_getuserbase() is not None) |
| |
| if _HAS_USER_BASE: |
| _INSTALL_SCHEMES |= { |
| # NOTE: When modifying "purelib" scheme, update site._get_path() too. |
| 'nt_user': { |
| 'stdlib': '{userbase}/Python{py_version_nodot_plat}', |
| 'platstdlib': '{userbase}/Python{py_version_nodot_plat}', |
| 'purelib': '{userbase}/Python{py_version_nodot_plat}/site-packages', |
| 'platlib': '{userbase}/Python{py_version_nodot_plat}/site-packages', |
| 'include': '{userbase}/Python{py_version_nodot_plat}/Include', |
| 'scripts': '{userbase}/Python{py_version_nodot_plat}/Scripts', |
| 'data': '{userbase}', |
| }, |
| 'posix_user': { |
| 'stdlib': '{userbase}/{platlibdir}/python{py_version_short}', |
| 'platstdlib': '{userbase}/{platlibdir}/python{py_version_short}', |
| 'purelib': '{userbase}/lib/python{py_version_short}/site-packages', |
| 'platlib': '{userbase}/lib/python{py_version_short}/site-packages', |
| 'include': '{userbase}/include/python{py_version_short}', |
| 'scripts': '{userbase}/bin', |
| 'data': '{userbase}', |
| }, |
| 'osx_framework_user': { |
| 'stdlib': '{userbase}/lib/python', |
| 'platstdlib': '{userbase}/lib/python', |
| 'purelib': '{userbase}/lib/python/site-packages', |
| 'platlib': '{userbase}/lib/python/site-packages', |
| 'include': '{userbase}/include/python{py_version_short}', |
| 'scripts': '{userbase}/bin', |
| 'data': '{userbase}', |
| }, |
| } |
| |
| _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) |
| _CONFIG_VARS = None |
| _USER_BASE = None |
| |
| # Regexes needed for parsing Makefile (and similar syntaxes, |
| # like old-style Setup files). |
| _variable_rx = r"([a-zA-Z][a-zA-Z0-9_]+)\s*=\s*(.*)" |
| _findvar1_rx = r"\$\(([A-Za-z][A-Za-z0-9_]*)\)" |
| _findvar2_rx = r"\${([A-Za-z][A-Za-z0-9_]*)}" |
| |
| |
| def _safe_realpath(path): |
| try: |
| return realpath(path) |
| except OSError: |
| return path |
| |
| if sys.executable: |
| _PROJECT_BASE = os.path.dirname(_safe_realpath(sys.executable)) |
| else: |
| # sys.executable can be empty if argv[0] has been changed and Python is |
| # unable to retrieve the real program name |
| _PROJECT_BASE = _safe_realpath(os.getcwd()) |
| |
| if (os.name == 'nt' and |
| _PROJECT_BASE.lower().endswith(('\\pcbuild\\win32', '\\pcbuild\\amd64'))): |
| _PROJECT_BASE = _safe_realpath(os.path.join(_PROJECT_BASE, pardir, pardir)) |
| |
| # set for cross builds |
| if "_PYTHON_PROJECT_BASE" in os.environ: |
| _PROJECT_BASE = _safe_realpath(os.environ["_PYTHON_PROJECT_BASE"]) |
| |
| def _is_python_source_dir(d): |
| for fn in ("Setup", "Setup.local"): |
| if os.path.isfile(os.path.join(d, "Modules", fn)): |
| return True |
| return False |
| |
| _sys_home = getattr(sys, '_home', None) |
| |
| if os.name == 'nt': |
| def _fix_pcbuild(d): |
| if d and os.path.normcase(d).startswith( |
| os.path.normcase(os.path.join(_PREFIX, "PCbuild"))): |
| return _PREFIX |
| return d |
| _PROJECT_BASE = _fix_pcbuild(_PROJECT_BASE) |
| _sys_home = _fix_pcbuild(_sys_home) |
| |
| def is_python_build(check_home=False): |
| if check_home and _sys_home: |
| return _is_python_source_dir(_sys_home) |
| return _is_python_source_dir(_PROJECT_BASE) |
| |
| _PYTHON_BUILD = is_python_build(True) |
| |
| if _PYTHON_BUILD: |
| for scheme in ('posix_prefix', 'posix_home'): |
| # On POSIX-y platforms, Python will: |
| # - Build from .h files in 'headers' (which is only added to the |
| # scheme when building CPython) |
| # - Install .h files to 'include' |
| scheme = _INSTALL_SCHEMES[scheme] |
| scheme['headers'] = scheme['include'] |
| scheme['include'] = '{srcdir}/Include' |
| scheme['platinclude'] = '{projectbase}/.' |
| |
| |
| def _subst_vars(s, local_vars): |
| try: |
| return s.format(**local_vars) |
| except KeyError as var: |
| try: |
| return s.format(**os.environ) |
| except KeyError: |
| raise AttributeError(f'{var}') from None |
| |
| def _extend_dict(target_dict, other_dict): |
| target_keys = target_dict.keys() |
| for key, value in other_dict.items(): |
| if key in target_keys: |
| continue |
| target_dict[key] = value |
| |
| |
| def _expand_vars(scheme, vars): |
| res = {} |
| if vars is None: |
| vars = {} |
| _extend_dict(vars, get_config_vars()) |
| |
| for key, value in _INSTALL_SCHEMES[scheme].items(): |
| if os.name in ('posix', 'nt'): |
| value = os.path.expanduser(value) |
| res[key] = os.path.normpath(_subst_vars(value, vars)) |
| return res |
| |
| |
| def _get_preferred_schemes(): |
| if os.name == 'nt': |
| return { |
| 'prefix': 'nt', |
| 'home': 'posix_home', |
| 'user': 'nt_user', |
| } |
| if sys.platform == 'darwin' and sys._framework: |
| return { |
| 'prefix': 'posix_prefix', |
| 'home': 'posix_home', |
| 'user': 'osx_framework_user', |
| } |
| return { |
| 'prefix': 'posix_prefix', |
| 'home': 'posix_home', |
| 'user': 'posix_user', |
| } |
| |
| |
| def get_preferred_scheme(key): |
| scheme = _get_preferred_schemes()[key] |
| if scheme not in _INSTALL_SCHEMES: |
| raise ValueError( |
| f"{key!r} returned {scheme!r}, which is not a valid scheme " |
| f"on this platform" |
| ) |
| return scheme |
| |
| |
| def get_default_scheme(): |
| return get_preferred_scheme('prefix') |
| |
| |
| def _parse_makefile(filename, vars=None, keep_unresolved=True): |
| """Parse a Makefile-style file. |
| |
| A dictionary containing name/value pairs is returned. If an |
| optional dictionary is passed in as the second argument, it is |
| used instead of a new dictionary. |
| """ |
| import re |
| |
| if vars is None: |
| vars = {} |
| done = {} |
| notdone = {} |
| |
| with open(filename, encoding=sys.getfilesystemencoding(), |
| errors="surrogateescape") as f: |
| lines = f.readlines() |
| |
| for line in lines: |
| if line.startswith('#') or line.strip() == '': |
| continue |
| m = re.match(_variable_rx, line) |
| if m: |
| n, v = m.group(1, 2) |
| v = v.strip() |
| # `$$' is a literal `$' in make |
| tmpv = v.replace('$$', '') |
| |
| if "$" in tmpv: |
| notdone[n] = v |
| else: |
| try: |
| if n in _ALWAYS_STR: |
| raise ValueError |
| |
| v = int(v) |
| except ValueError: |
| # insert literal `$' |
| done[n] = v.replace('$$', '$') |
| else: |
| done[n] = v |
| |
| # do variable interpolation here |
| variables = list(notdone.keys()) |
| |
| # Variables with a 'PY_' prefix in the makefile. These need to |
| # be made available without that prefix through sysconfig. |
| # Special care is needed to ensure that variable expansion works, even |
| # if the expansion uses the name without a prefix. |
| renamed_variables = ('CFLAGS', 'LDFLAGS', 'CPPFLAGS') |
| |
| while len(variables) > 0: |
| for name in tuple(variables): |
| value = notdone[name] |
| m1 = re.search(_findvar1_rx, value) |
| m2 = re.search(_findvar2_rx, value) |
| if m1 and m2: |
| m = m1 if m1.start() < m2.start() else m2 |
| else: |
| m = m1 if m1 else m2 |
| if m is not None: |
| n = m.group(1) |
| found = True |
| if n in done: |
| item = str(done[n]) |
| elif n in notdone: |
| # get it on a subsequent round |
| found = False |
| elif n in os.environ: |
| # do it like make: fall back to environment |
| item = os.environ[n] |
| |
| elif n in renamed_variables: |
| if (name.startswith('PY_') and |
| name[3:] in renamed_variables): |
| item = "" |
| |
| elif 'PY_' + n in notdone: |
| found = False |
| |
| else: |
| item = str(done['PY_' + n]) |
| |
| else: |
| done[n] = item = "" |
| |
| if found: |
| after = value[m.end():] |
| value = value[:m.start()] + item + after |
| if "$" in after: |
| notdone[name] = value |
| else: |
| try: |
| if name in _ALWAYS_STR: |
| raise ValueError |
| value = int(value) |
| except ValueError: |
| done[name] = value.strip() |
| else: |
| done[name] = value |
| variables.remove(name) |
| |
| if name.startswith('PY_') \ |
| and name[3:] in renamed_variables: |
| |
| name = name[3:] |
| if name not in done: |
| done[name] = value |
| |
| else: |
| # Adds unresolved variables to the done dict. |
| # This is disabled when called from distutils.sysconfig |
| if keep_unresolved: |
| done[name] = value |
| # bogus variable reference (e.g. "prefix=$/opt/python"); |
| # just drop it since we can't deal |
| variables.remove(name) |
| |
| # strip spurious spaces |
| for k, v in done.items(): |
| if isinstance(v, str): |
| done[k] = v.strip() |
| |
| # save the results in the global dictionary |
| vars.update(done) |
| return vars |
| |
| |
| def get_makefile_filename(): |
| """Return the path of the Makefile.""" |
| if _PYTHON_BUILD: |
| return os.path.join(_sys_home or _PROJECT_BASE, "Makefile") |
| if hasattr(sys, 'abiflags'): |
| config_dir_name = f'config-{_PY_VERSION_SHORT}{sys.abiflags}' |
| else: |
| config_dir_name = 'config' |
| if hasattr(sys.implementation, '_multiarch'): |
| config_dir_name += f'-{sys.implementation._multiarch}' |
| return os.path.join(get_path('stdlib'), config_dir_name, 'Makefile') |
| |
| |
| def _get_sysconfigdata_name(): |
| multiarch = getattr(sys.implementation, '_multiarch', '') |
| return os.environ.get( |
| '_PYTHON_SYSCONFIGDATA_NAME', |
| f'_sysconfigdata_{sys.abiflags}_{sys.platform}_{multiarch}', |
| ) |
| |
| |
| def _generate_posix_vars(): |
| """Generate the Python module containing build-time variables.""" |
| import pprint |
| vars = {} |
| # load the installed Makefile: |
| makefile = get_makefile_filename() |
| try: |
| _parse_makefile(makefile, vars) |
| except OSError as e: |
| msg = f"invalid Python installation: unable to open {makefile}" |
| if hasattr(e, "strerror"): |
| msg = f"{msg} ({e.strerror})" |
| raise OSError(msg) |
| # load the installed pyconfig.h: |
| config_h = get_config_h_filename() |
| try: |
| with open(config_h, encoding="utf-8") as f: |
| parse_config_h(f, vars) |
| except OSError as e: |
| msg = f"invalid Python installation: unable to open {config_h}" |
| if hasattr(e, "strerror"): |
| msg = f"{msg} ({e.strerror})" |
| raise OSError(msg) |
| # On AIX, there are wrong paths to the linker scripts in the Makefile |
| # -- these paths are relative to the Python source, but when installed |
| # the scripts are in another directory. |
| if _PYTHON_BUILD: |
| vars['BLDSHARED'] = vars['LDSHARED'] |
| |
| # There's a chicken-and-egg situation on OS X with regards to the |
| # _sysconfigdata module after the changes introduced by #15298: |
| # get_config_vars() is called by get_platform() as part of the |
| # `make pybuilddir.txt` target -- which is a precursor to the |
| # _sysconfigdata.py module being constructed. Unfortunately, |
| # get_config_vars() eventually calls _init_posix(), which attempts |
| # to import _sysconfigdata, which we won't have built yet. In order |
| # for _init_posix() to work, if we're on Darwin, just mock up the |
| # _sysconfigdata module manually and populate it with the build vars. |
| # This is more than sufficient for ensuring the subsequent call to |
| # get_platform() succeeds. |
| name = _get_sysconfigdata_name() |
| if 'darwin' in sys.platform: |
| import types |
| module = types.ModuleType(name) |
| module.build_time_vars = vars |
| sys.modules[name] = module |
| |
| pybuilddir = f'build/lib.{get_platform()}-{_PY_VERSION_SHORT}' |
| if hasattr(sys, "gettotalrefcount"): |
| pybuilddir += '-pydebug' |
| os.makedirs(pybuilddir, exist_ok=True) |
| destfile = os.path.join(pybuilddir, name + '.py') |
| |
| with open(destfile, 'w', encoding='utf8') as f: |
| f.write('# system configuration generated and used by' |
| ' the sysconfig module\n') |
| f.write('build_time_vars = ') |
| pprint.pprint(vars, stream=f) |
| |
| # Create file used for sys.path fixup -- see Modules/getpath.c |
| with open('pybuilddir.txt', 'w', encoding='utf8') as f: |
| f.write(pybuilddir) |
| |
| def _init_posix(vars): |
| """Initialize the module as appropriate for POSIX systems.""" |
| # _sysconfigdata is generated at build time, see _generate_posix_vars() |
| name = _get_sysconfigdata_name() |
| _temp = __import__(name, globals(), locals(), ['build_time_vars'], 0) |
| build_time_vars = _temp.build_time_vars |
| vars.update(build_time_vars) |
| |
| def _init_non_posix(vars): |
| """Initialize the module as appropriate for NT""" |
| # set basic install directories |
| import _imp |
| vars['LIBDEST'] = get_path('stdlib') |
| vars['BINLIBDEST'] = get_path('platstdlib') |
| vars['INCLUDEPY'] = get_path('include') |
| vars['EXT_SUFFIX'] = _imp.extension_suffixes()[0] |
| vars['EXE'] = '.exe' |
| vars['VERSION'] = _PY_VERSION_SHORT_NO_DOT |
| vars['BINDIR'] = os.path.dirname(_safe_realpath(sys.executable)) |
| vars['TZPATH'] = '' |
| |
| # |
| # public APIs |
| # |
| |
| |
| def parse_config_h(fp, vars=None): |
| """Parse a config.h-style file. |
| |
| A dictionary containing name/value pairs is returned. If an |
| optional dictionary is passed in as the second argument, it is |
| used instead of a new dictionary. |
| """ |
| if vars is None: |
| vars = {} |
| import re |
| define_rx = re.compile("#define ([A-Z][A-Za-z0-9_]+) (.*)\n") |
| undef_rx = re.compile("/[*] #undef ([A-Z][A-Za-z0-9_]+) [*]/\n") |
| |
| while True: |
| line = fp.readline() |
| if not line: |
| break |
| m = define_rx.match(line) |
| if m: |
| n, v = m.group(1, 2) |
| try: |
| if n in _ALWAYS_STR: |
| raise ValueError |
| v = int(v) |
| except ValueError: |
| pass |
| vars[n] = v |
| else: |
| m = undef_rx.match(line) |
| if m: |
| vars[m.group(1)] = 0 |
| return vars |
| |
| |
| def get_config_h_filename(): |
| """Return the path of pyconfig.h.""" |
| if _PYTHON_BUILD: |
| if os.name == "nt": |
| inc_dir = os.path.join(_sys_home or _PROJECT_BASE, "PC") |
| else: |
| inc_dir = _sys_home or _PROJECT_BASE |
| else: |
| inc_dir = get_path('platinclude') |
| return os.path.join(inc_dir, 'pyconfig.h') |
| |
| |
| def get_scheme_names(): |
| """Return a tuple containing the schemes names.""" |
| return tuple(sorted(_INSTALL_SCHEMES)) |
| |
| |
| def get_path_names(): |
| """Return a tuple containing the paths names.""" |
| return _SCHEME_KEYS |
| |
| |
| 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 |
| _CONFIG_VARS['platlibdir'] = sys.platlibdir |
| try: |
| _CONFIG_VARS['abiflags'] = sys.abiflags |
| except AttributeError: |
| # sys.abiflags may not be defined on all platforms. |
| _CONFIG_VARS['abiflags'] = '' |
| try: |
| _CONFIG_VARS['py_version_nodot_plat'] = sys.winver.replace('.', '') |
| except AttributeError: |
| _CONFIG_VARS['py_version_nodot_plat'] = '' |
| |
| 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 |
| if _HAS_USER_BASE: |
| # 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' |
| if '(arm)' in sys.version.lower(): |
| return 'win-arm32' |
| if '(arm64)' in sys.version.lower(): |
| return 'win-arm64' |
| 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 f"{osname}-{machine}" |
| elif osname[:5] == "sunos": |
| if release[0] >= "5": # SunOS 5 == Solaris 2 |
| osname = "solaris" |
| release = f"{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 += f".{bitness[sys.maxsize]}" |
| # fall through to standard osname-release-machine representation |
| elif osname[:3] == "aix": |
| from _aix_support import aix_platform |
| return aix_platform() |
| 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 f"{osname}-{release}-{machine}" |
| |
| |
| def get_python_version(): |
| return _PY_VERSION_SHORT |
| |
| |
| def expand_makefile_vars(s, vars): |
| """Expand Makefile-style variables -- "${foo}" or "$(foo)" -- in |
| 'string' according to 'vars' (a dictionary mapping variable names to |
| values). Variables not present in 'vars' are silently expanded to the |
| empty string. The variable values in 'vars' should not contain further |
| variable expansions; if 'vars' is the output of 'parse_makefile()', |
| you're fine. Returns a variable-expanded version of 's'. |
| """ |
| import re |
| |
| # This algorithm does multiple expansion, so if vars['foo'] contains |
| # "${bar}", it will expand ${foo} to ${bar}, and then expand |
| # ${bar}... and so forth. This is fine as long as 'vars' comes from |
| # 'parse_makefile()', which takes care of such expansions eagerly, |
| # according to make's variable expansion semantics. |
| |
| while True: |
| m = re.search(_findvar1_rx, s) or re.search(_findvar2_rx, s) |
| if m: |
| (beg, end) = m.span() |
| s = s[0:beg] + vars.get(m.group(1)) + s[end:] |
| else: |
| break |
| return s |
| |
| |
| def _print_dict(title, data): |
| for index, (key, value) in enumerate(sorted(data.items())): |
| if index == 0: |
| print(f'{title}: ') |
| print(f'\t{key} = "{value}"') |
| |
| |
| def _main(): |
| """Display all information sysconfig detains.""" |
| if '--generate-posix-vars' in sys.argv: |
| _generate_posix_vars() |
| return |
| print(f'Platform: "{get_platform()}"') |
| print(f'Python version: "{get_python_version()}"') |
| print(f'Current installation scheme: "{get_default_scheme()}"') |
| print() |
| _print_dict('Paths', get_paths()) |
| print() |
| _print_dict('Variables', get_config_vars()) |
| |
| |
| if __name__ == '__main__': |
| _main() |