574 lines
21 KiB
Python
574 lines
21 KiB
Python
"""Provide access to Python's configuration information. The specific
|
|
configuration variables available depend heavily on the platform and
|
|
configuration. The values may be retrieved using
|
|
get_config_var(name), and the list of variables is available via
|
|
get_config_vars().keys(). Additional convenience functions are also
|
|
available.
|
|
|
|
Written by: Fred L. Drake, Jr.
|
|
Email: <fdrake@acm.org>
|
|
"""
|
|
|
|
import _imp
|
|
import os
|
|
import re
|
|
import sys
|
|
|
|
from .errors import DistutilsPlatformError
|
|
|
|
IS_PYPY = '__pypy__' in sys.builtin_module_names
|
|
|
|
# These are needed in a couple of spots, so just compute them once.
|
|
PREFIX = os.path.normpath(sys.prefix)
|
|
EXEC_PREFIX = os.path.normpath(sys.exec_prefix)
|
|
BASE_PREFIX = os.path.normpath(sys.base_prefix)
|
|
BASE_EXEC_PREFIX = os.path.normpath(sys.base_exec_prefix)
|
|
|
|
# Path to the base directory of the project. On Windows the binary may
|
|
# live in project/PCbuild/win32 or project/PCbuild/amd64.
|
|
# set for cross builds
|
|
if "_PYTHON_PROJECT_BASE" in os.environ:
|
|
project_base = os.path.abspath(os.environ["_PYTHON_PROJECT_BASE"])
|
|
else:
|
|
if sys.executable:
|
|
project_base = os.path.dirname(os.path.abspath(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 = os.getcwd()
|
|
|
|
|
|
# python_build: (Boolean) if true, we're either building Python or
|
|
# building an extension with an un-installed Python, so we use
|
|
# different (hard-wired) directories.
|
|
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 _python_build():
|
|
if _sys_home:
|
|
return _is_python_source_dir(_sys_home)
|
|
return _is_python_source_dir(project_base)
|
|
|
|
python_build = _python_build()
|
|
|
|
|
|
# Calculate the build qualifier flags if they are defined. Adding the flags
|
|
# to the include and lib directories only makes sense for an installation, not
|
|
# an in-source build.
|
|
build_flags = ''
|
|
try:
|
|
if not python_build:
|
|
build_flags = sys.abiflags
|
|
except AttributeError:
|
|
# It's not a configure-based build, so the sys module doesn't have
|
|
# this attribute, which is fine.
|
|
pass
|
|
|
|
def get_python_version():
|
|
"""Return a string containing the major and minor Python version,
|
|
leaving off the patchlevel. Sample return values could be '1.5'
|
|
or '2.2'.
|
|
"""
|
|
return '%d.%d' % sys.version_info[:2]
|
|
|
|
|
|
def get_python_inc(plat_specific=0, prefix=None):
|
|
"""Return the directory containing installed Python header files.
|
|
|
|
If 'plat_specific' is false (the default), this is the path to the
|
|
non-platform-specific header files, i.e. Python.h and so on;
|
|
otherwise, this is the path to platform-specific header files
|
|
(namely pyconfig.h).
|
|
|
|
If 'prefix' is supplied, use it instead of sys.base_prefix or
|
|
sys.base_exec_prefix -- i.e., ignore 'plat_specific'.
|
|
"""
|
|
if prefix is None:
|
|
prefix = plat_specific and BASE_EXEC_PREFIX or BASE_PREFIX
|
|
if IS_PYPY:
|
|
return os.path.join(prefix, 'include')
|
|
elif os.name == "posix":
|
|
if python_build:
|
|
# Assume the executable is in the build directory. The
|
|
# pyconfig.h file should be in the same directory. Since
|
|
# the build directory may not be the source directory, we
|
|
# must use "srcdir" from the makefile to find the "Include"
|
|
# directory.
|
|
if plat_specific:
|
|
return _sys_home or project_base
|
|
else:
|
|
incdir = os.path.join(get_config_var('srcdir'), 'Include')
|
|
return os.path.normpath(incdir)
|
|
python_dir = 'python' + get_python_version() + build_flags
|
|
return os.path.join(prefix, "include", python_dir)
|
|
elif os.name == "nt":
|
|
if python_build:
|
|
# Include both the include and PC dir to ensure we can find
|
|
# pyconfig.h
|
|
return (os.path.join(prefix, "include") + os.path.pathsep +
|
|
os.path.join(prefix, "PC"))
|
|
return os.path.join(prefix, "include")
|
|
else:
|
|
raise DistutilsPlatformError(
|
|
"I don't know where Python installs its C header files "
|
|
"on platform '%s'" % os.name)
|
|
|
|
|
|
def get_python_lib(plat_specific=0, standard_lib=0, prefix=None):
|
|
"""Return the directory containing the Python library (standard or
|
|
site additions).
|
|
|
|
If 'plat_specific' is true, return the directory containing
|
|
platform-specific modules, i.e. any module from a non-pure-Python
|
|
module distribution; otherwise, return the platform-shared library
|
|
directory. If 'standard_lib' is true, return the directory
|
|
containing standard Python library modules; otherwise, return the
|
|
directory for site-specific modules.
|
|
|
|
If 'prefix' is supplied, use it instead of sys.base_prefix or
|
|
sys.base_exec_prefix -- i.e., ignore 'plat_specific'.
|
|
"""
|
|
if IS_PYPY:
|
|
# PyPy-specific schema
|
|
if prefix is None:
|
|
prefix = PREFIX
|
|
if standard_lib:
|
|
return os.path.join(prefix, "lib-python", sys.version[0])
|
|
return os.path.join(prefix, 'site-packages')
|
|
|
|
if prefix is None:
|
|
if standard_lib:
|
|
prefix = plat_specific and BASE_EXEC_PREFIX or BASE_PREFIX
|
|
else:
|
|
prefix = plat_specific and EXEC_PREFIX or PREFIX
|
|
|
|
if os.name == "posix":
|
|
if plat_specific or standard_lib:
|
|
# Platform-specific modules (any module from a non-pure-Python
|
|
# module distribution) or standard Python library modules.
|
|
libdir = getattr(sys, "platlibdir", "lib")
|
|
else:
|
|
# Pure Python
|
|
libdir = "lib"
|
|
libpython = os.path.join(prefix, libdir,
|
|
"python" + get_python_version())
|
|
if standard_lib:
|
|
return libpython
|
|
else:
|
|
return os.path.join(libpython, "site-packages")
|
|
elif os.name == "nt":
|
|
if standard_lib:
|
|
return os.path.join(prefix, "Lib")
|
|
else:
|
|
return os.path.join(prefix, "Lib", "site-packages")
|
|
else:
|
|
raise DistutilsPlatformError(
|
|
"I don't know where Python installs its library "
|
|
"on platform '%s'" % os.name)
|
|
|
|
|
|
|
|
def customize_compiler(compiler):
|
|
"""Do any platform-specific customization of a CCompiler instance.
|
|
|
|
Mainly needed on Unix, so we can plug in the information that
|
|
varies across Unices and is stored in Python's Makefile.
|
|
"""
|
|
if compiler.compiler_type == "unix":
|
|
if sys.platform == "darwin":
|
|
# Perform first-time customization of compiler-related
|
|
# config vars on OS X now that we know we need a compiler.
|
|
# This is primarily to support Pythons from binary
|
|
# installers. The kind and paths to build tools on
|
|
# the user system may vary significantly from the system
|
|
# that Python itself was built on. Also the user OS
|
|
# version and build tools may not support the same set
|
|
# of CPU architectures for universal builds.
|
|
global _config_vars
|
|
# Use get_config_var() to ensure _config_vars is initialized.
|
|
if not get_config_var('CUSTOMIZED_OSX_COMPILER'):
|
|
import _osx_support
|
|
_osx_support.customize_compiler(_config_vars)
|
|
_config_vars['CUSTOMIZED_OSX_COMPILER'] = 'True'
|
|
|
|
(cc, cxx, cflags, ccshared, ldshared, shlib_suffix, ar, ar_flags) = \
|
|
get_config_vars('CC', 'CXX', 'CFLAGS',
|
|
'CCSHARED', 'LDSHARED', 'SHLIB_SUFFIX', 'AR', 'ARFLAGS')
|
|
|
|
if 'CC' in os.environ:
|
|
newcc = os.environ['CC']
|
|
if (sys.platform == 'darwin'
|
|
and 'LDSHARED' not in os.environ
|
|
and ldshared.startswith(cc)):
|
|
# On OS X, if CC is overridden, use that as the default
|
|
# command for LDSHARED as well
|
|
ldshared = newcc + ldshared[len(cc):]
|
|
cc = newcc
|
|
if 'CXX' in os.environ:
|
|
cxx = os.environ['CXX']
|
|
if 'LDSHARED' in os.environ:
|
|
ldshared = os.environ['LDSHARED']
|
|
if 'CPP' in os.environ:
|
|
cpp = os.environ['CPP']
|
|
else:
|
|
cpp = cc + " -E" # not always
|
|
if 'LDFLAGS' in os.environ:
|
|
ldshared = ldshared + ' ' + os.environ['LDFLAGS']
|
|
if 'CFLAGS' in os.environ:
|
|
cflags = cflags + ' ' + os.environ['CFLAGS']
|
|
ldshared = ldshared + ' ' + os.environ['CFLAGS']
|
|
if 'CPPFLAGS' in os.environ:
|
|
cpp = cpp + ' ' + os.environ['CPPFLAGS']
|
|
cflags = cflags + ' ' + os.environ['CPPFLAGS']
|
|
ldshared = ldshared + ' ' + os.environ['CPPFLAGS']
|
|
if 'AR' in os.environ:
|
|
ar = os.environ['AR']
|
|
if 'ARFLAGS' in os.environ:
|
|
archiver = ar + ' ' + os.environ['ARFLAGS']
|
|
else:
|
|
archiver = ar + ' ' + ar_flags
|
|
|
|
cc_cmd = cc + ' ' + cflags
|
|
compiler.set_executables(
|
|
preprocessor=cpp,
|
|
compiler=cc_cmd,
|
|
compiler_so=cc_cmd + ' ' + ccshared,
|
|
compiler_cxx=cxx,
|
|
linker_so=ldshared,
|
|
linker_exe=cc,
|
|
archiver=archiver)
|
|
|
|
compiler.shared_lib_extension = shlib_suffix
|
|
|
|
|
|
def get_config_h_filename():
|
|
"""Return full pathname of installed pyconfig.h file."""
|
|
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_python_inc(plat_specific=1)
|
|
|
|
return os.path.join(inc_dir, 'pyconfig.h')
|
|
|
|
|
|
def get_makefile_filename():
|
|
"""Return full pathname of installed Makefile from the Python build."""
|
|
if python_build:
|
|
return os.path.join(_sys_home or project_base, "Makefile")
|
|
lib_dir = get_python_lib(plat_specific=0, standard_lib=1)
|
|
config_file = 'config-{}{}'.format(get_python_version(), build_flags)
|
|
if hasattr(sys.implementation, '_multiarch'):
|
|
config_file += '-%s' % sys.implementation._multiarch
|
|
return os.path.join(lib_dir, config_file, 'Makefile')
|
|
|
|
|
|
def parse_config_h(fp, g=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 g is None:
|
|
g = {}
|
|
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: v = int(v)
|
|
except ValueError: pass
|
|
g[n] = v
|
|
else:
|
|
m = undef_rx.match(line)
|
|
if m:
|
|
g[m.group(1)] = 0
|
|
return g
|
|
|
|
|
|
# Regexes needed for parsing Makefile (and similar syntaxes,
|
|
# like old-style Setup files).
|
|
_variable_rx = re.compile(r"([a-zA-Z][a-zA-Z0-9_]+)\s*=\s*(.*)")
|
|
_findvar1_rx = re.compile(r"\$\(([A-Za-z][A-Za-z0-9_]*)\)")
|
|
_findvar2_rx = re.compile(r"\${([A-Za-z][A-Za-z0-9_]*)}")
|
|
|
|
def parse_makefile(fn, g=None):
|
|
"""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.
|
|
"""
|
|
from distutils.text_file import TextFile
|
|
fp = TextFile(fn, strip_comments=1, skip_blanks=1, join_lines=1, errors="surrogateescape")
|
|
|
|
if g is None:
|
|
g = {}
|
|
done = {}
|
|
notdone = {}
|
|
|
|
while True:
|
|
line = fp.readline()
|
|
if line is None: # eof
|
|
break
|
|
m = _variable_rx.match(line)
|
|
if m:
|
|
n, v = m.group(1, 2)
|
|
v = v.strip()
|
|
# `$$' is a literal `$' in make
|
|
tmpv = v.replace('$$', '')
|
|
|
|
if "$" in tmpv:
|
|
notdone[n] = v
|
|
else:
|
|
try:
|
|
v = int(v)
|
|
except ValueError:
|
|
# insert literal `$'
|
|
done[n] = v.replace('$$', '$')
|
|
else:
|
|
done[n] = v
|
|
|
|
# Variables with a 'PY_' prefix in the makefile. These need to
|
|
# be made available without that prefix through sysconfig.
|
|
# Special care is needed to ensure that variable expansion works, even
|
|
# if the expansion uses the name without a prefix.
|
|
renamed_variables = ('CFLAGS', 'LDFLAGS', 'CPPFLAGS')
|
|
|
|
# do variable interpolation here
|
|
while notdone:
|
|
for name in list(notdone):
|
|
value = notdone[name]
|
|
m = _findvar1_rx.search(value) or _findvar2_rx.search(value)
|
|
if m:
|
|
n = m.group(1)
|
|
found = True
|
|
if n in done:
|
|
item = str(done[n])
|
|
elif n in notdone:
|
|
# get it on a subsequent round
|
|
found = False
|
|
elif n in os.environ:
|
|
# do it like make: fall back to environment
|
|
item = os.environ[n]
|
|
|
|
elif n in renamed_variables:
|
|
if name.startswith('PY_') and name[3:] in renamed_variables:
|
|
item = ""
|
|
|
|
elif 'PY_' + n in notdone:
|
|
found = False
|
|
|
|
else:
|
|
item = str(done['PY_' + n])
|
|
else:
|
|
done[n] = item = ""
|
|
if found:
|
|
after = value[m.end():]
|
|
value = value[:m.start()] + item + after
|
|
if "$" in after:
|
|
notdone[name] = value
|
|
else:
|
|
try: value = int(value)
|
|
except ValueError:
|
|
done[name] = value.strip()
|
|
else:
|
|
done[name] = value
|
|
del notdone[name]
|
|
|
|
if name.startswith('PY_') \
|
|
and name[3:] in renamed_variables:
|
|
|
|
name = name[3:]
|
|
if name not in done:
|
|
done[name] = value
|
|
else:
|
|
# bogus variable reference; just drop it since we can't deal
|
|
del notdone[name]
|
|
|
|
fp.close()
|
|
|
|
# strip spurious spaces
|
|
for k, v in done.items():
|
|
if isinstance(v, str):
|
|
done[k] = v.strip()
|
|
|
|
# save the results in the global dictionary
|
|
g.update(done)
|
|
return g
|
|
|
|
|
|
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'.
|
|
"""
|
|
|
|
# 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 = _findvar1_rx.search(s) or _findvar2_rx.search(s)
|
|
if m:
|
|
(beg, end) = m.span()
|
|
s = s[0:beg] + vars.get(m.group(1)) + s[end:]
|
|
else:
|
|
break
|
|
return s
|
|
|
|
|
|
_config_vars = None
|
|
|
|
def _init_posix():
|
|
"""Initialize the module as appropriate for POSIX systems."""
|
|
# _sysconfigdata is generated at build time, see the sysconfig module
|
|
name = os.environ.get('_PYTHON_SYSCONFIGDATA_NAME',
|
|
'_sysconfigdata_{abi}_{platform}_{multiarch}'.format(
|
|
abi=sys.abiflags,
|
|
platform=sys.platform,
|
|
multiarch=getattr(sys.implementation, '_multiarch', ''),
|
|
))
|
|
try:
|
|
_temp = __import__(name, globals(), locals(), ['build_time_vars'], 0)
|
|
except ImportError:
|
|
# Python 3.5 and pypy 7.3.1
|
|
_temp = __import__(
|
|
'_sysconfigdata', globals(), locals(), ['build_time_vars'], 0)
|
|
build_time_vars = _temp.build_time_vars
|
|
global _config_vars
|
|
_config_vars = {}
|
|
_config_vars.update(build_time_vars)
|
|
|
|
|
|
def _init_nt():
|
|
"""Initialize the module as appropriate for NT"""
|
|
g = {}
|
|
# set basic install directories
|
|
g['LIBDEST'] = get_python_lib(plat_specific=0, standard_lib=1)
|
|
g['BINLIBDEST'] = get_python_lib(plat_specific=1, standard_lib=1)
|
|
|
|
# XXX hmmm.. a normal install puts include files here
|
|
g['INCLUDEPY'] = get_python_inc(plat_specific=0)
|
|
|
|
g['EXT_SUFFIX'] = _imp.extension_suffixes()[0]
|
|
g['EXE'] = ".exe"
|
|
g['VERSION'] = get_python_version().replace(".", "")
|
|
g['BINDIR'] = os.path.dirname(os.path.abspath(sys.executable))
|
|
|
|
global _config_vars
|
|
_config_vars = g
|
|
|
|
|
|
def get_config_vars(*args):
|
|
"""With no arguments, return a dictionary of all configuration
|
|
variables relevant for the current platform. Generally this includes
|
|
everything needed to build extensions and install both pure modules and
|
|
extensions. 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:
|
|
func = globals().get("_init_" + os.name)
|
|
if func:
|
|
func()
|
|
else:
|
|
_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
|
|
|
|
if not IS_PYPY:
|
|
# For backward compatibility, see issue19555
|
|
SO = _config_vars.get('EXT_SUFFIX')
|
|
if SO is not None:
|
|
_config_vars['SO'] = SO
|
|
|
|
# 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'] = os.path.abspath(os.path.normpath(srcdir))
|
|
|
|
# Convert srcdir into an absolute path if it appears necessary.
|
|
# Normally it is relative to the build directory. However, during
|
|
# testing, for example, we might be running a non-installed python
|
|
# from a different directory.
|
|
if python_build and os.name == "posix":
|
|
base = project_base
|
|
if (not os.path.isabs(_config_vars['srcdir']) and
|
|
base != os.getcwd()):
|
|
# srcdir is relative and we are not in the same directory
|
|
# as the executable. Assume executable is in the build
|
|
# directory and make srcdir absolute.
|
|
srcdir = os.path.join(base, _config_vars['srcdir'])
|
|
_config_vars['srcdir'] = os.path.normpath(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)
|