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# Trimmed version of /usr/lib/python3.8/distutils/sysconfig.py
"""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 os
import sys
from sysconfig import get_python_version
# 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)
# Added by GDAL
def _is_debian():
for p in sys.path:
if "dist-packages" in p:
return True
return False
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'.
"""
is_default_prefix = not prefix or os.path.normpath(prefix) in ("/usr", "/usr/local")
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":
libpython = os.path.join(prefix, "lib", "python" + get_python_version())
if standard_lib:
return libpython
# This check is Debian specific
elif (
_is_debian()
and is_default_prefix
and "PYTHONUSERBASE" not in os.environ
and "VIRTUAL_ENV" not in os.environ
and "real_prefix" not in sys.__dict__
and sys.prefix == sys.base_prefix
):
return os.path.join(prefix, "lib", "python3", "dist-packages")
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 Exception(
"I don't know where Python installs its library "
"on platform '%s'" % os.name
)
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