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"""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}', }, 'deb_system': { 'stdlib': '{installed_base}/lib/python{py_version_short}', 'platstdlib': '{platbase}/lib/python{py_version_short}', 'purelib': '{base}/lib/python3/dist-packages', 'platlib': '{platbase}/lib/python3/dist-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_local': { 'stdlib': '{installed_base}/lib/python{py_version_short}', 'platstdlib': '{platbase}/lib/python{py_version_short}', 'purelib': '{base}/local/lib/python{py_version_short}/dist-packages', 'platlib': '{platbase}/local/lib/python{py_version_short}/dist-packages', 'include': '{installed_base}/include/python{py_version_short}{abiflags}', 'platinclude': '{installed_platbase}/include/python{py_version_short}{abiflags}', 'scripts': '{base}/local/bin', 'data': '{base}/local', }, '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}', }, # Downstream distributors can overwrite the default install scheme. # This is done to support downstream modifications where distributors change # the installation layout (eg. different site-packages directory). # So, distributors will change the default scheme to one that correctly # represents their layout. # This presents an issue for projects/people that need to bootstrap virtual # environments, like virtualenv. As distributors might now be customizing # the default install scheme, there is no guarantee that the information # returned by sysconfig.get_default_scheme/get_paths is correct for # a virtual environment, the only guarantee we have is that it is correct # for the *current* environment. When bootstrapping a virtual environment, # we need to know its layout, so that we can place the files in the # correct locations. # The "*_venv" install scheme is a scheme to bootstrap virtual environments, # essentially identical to the default posix_prefix/nt schemes. # Downstream distributors who patch posix_prefix/nt scheme are encouraged to # leave the following schemes unchanged 'posix_venv': { '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}', }, 'nt_venv': { '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}', }, } # For the OS-native venv scheme, we essentially provide an alias: if os.name == 'nt': _INSTALL_SCHEMES['venv'] = _INSTALL_SCHEMES['nt_venv'] else: _INSTALL_SCHEMES['venv'] = _INSTALL_SCHEMES['posix_venv'] # 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 # Emscripten, VxWorks, and WASI have no home directories if sys.platform in {"emscripten", "vxworks", "wasi"}: 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()) # In a virtual environment, `sys._home` gives us the target directory # `_PROJECT_BASE` for the executable that created it when the virtual # python is an actual executable ('venv --copies' or Windows). _sys_home = getattr(sys, '_home', None) if _sys_home: _PROJECT_BASE = _sys_home if os.name == 'nt': # In a source build, the executable is in a subdirectory of the root # that we want (
\PCbuild\
). # `_BASE_PREFIX` is used as the base installation is where the source # will be. The realpath is needed to prevent mount point confusion # that can occur with just string comparisons. if _safe_realpath(_PROJECT_BASE).startswith( _safe_realpath(f'{_BASE_PREFIX}\\PCbuild')): _PROJECT_BASE = _BASE_PREFIX # set for cross builds if "_PYTHON_PROJECT_BASE" in os.environ: _PROJECT_BASE = _safe_realpath(os.environ["_PYTHON_PROJECT_BASE"]) def is_python_build(check_home=None): if check_home is not None: import warnings warnings.warn("check_home argument is deprecated and ignored.", DeprecationWarning, stacklevel=2) for fn in ("Setup", "Setup.local"): if os.path.isfile(os.path.join(_PROJECT_BASE, "Modules", fn)): return True return False _PYTHON_BUILD = is_python_build() if _PYTHON_BUILD: for scheme in ('posix_prefix', 'posix_home', 'posix_local', 'deb_system'): # 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}/.' del scheme 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()) if os.name == 'nt': # On Windows we want to substitute 'lib' for schemes rather # than the native value (without modifying vars, in case it # was passed in) vars = vars | {'platlibdir': 'lib'} 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', } if sys.base_prefix != sys.prefix or hasattr(sys, "real_prefix"): # virtual environments prefix_scheme = 'posix_prefix' else: # default to /usr for package builds, /usr/local otherwise deb_build = os.environ.get('DEB_PYTHON_INSTALL_LAYOUT', 'posix_local') if deb_build in ('deb', 'deb_system'): prefix_scheme = 'deb_system' else: prefix_scheme = 'posix_local' return { 'prefix': prefix_scheme, 'home': 'posix_home', 'user': 'posix_user', } def get_preferred_scheme(key): if key == 'prefix' and sys.prefix != sys.base_prefix: return 'venv' 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(_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}_{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(_PROJECT_BASE, "PC") else: inc_dir = _PROJECT_BASE else: inc_dir = get_path('platinclude', 'posix_prefix') 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) _CONFIG_VARS['VPATH'] = sys._vpath if os.name == 'posix': _init_posix(_CONFIG_VARS) 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() multiarch = get_config_var('MULTIARCH') if multiarch: _CONFIG_VARS['multiarchsubdir'] = '/' + multiarch else: _CONFIG_VARS['multiarchsubdir'] = '' # 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) """ 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()
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