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"""
Backward compatibility support for Python 3.5
"""
import sys
import test.support
import subprocess
# copied from Python 3.9 test.support module
def _missing_compiler_executable(cmd_names=[]):
"""Check if the compiler components used to build the interpreter exist.
Check for the existence of the compiler executables whose names are listed
in 'cmd_names' or all the compiler executables when 'cmd_names' is empty
and return the first missing executable or None when none is found
missing.
"""
from distutils import ccompiler, sysconfig, spawn
compiler = ccompiler.new_compiler()
sysconfig.customize_compiler(compiler)
for name in compiler.executables:
if cmd_names and name not in cmd_names:
continue
cmd = getattr(compiler, name)
if cmd_names:
assert cmd is not None, \
"the '%s' executable is not configured" % name
elif not cmd:
continue
if spawn.find_executable(cmd[0]) is None:
return cmd[0]
missing_compiler_executable = vars(test.support).setdefault(
'missing_compiler_executable',
_missing_compiler_executable,
)
try:
from test.support import unix_shell
except ImportError:
# Adapted from Python 3.9 test.support module
is_android = hasattr(sys, 'getandroidapilevel')
unix_shell = (
None if sys.platform == 'win32' else
'/system/bin/sh' if is_android else
'/bin/sh'
)
# copied from Python 3.9 subprocess module
def _optim_args_from_interpreter_flags():
"""Return a list of command-line arguments reproducing the current
optimization settings in sys.flags."""
args = []
value = sys.flags.optimize
if value > 0:
args.append('-' + 'O' * value)
return args
vars(subprocess).setdefault(
'_optim_args_from_interpreter_flags',
_optim_args_from_interpreter_flags,
)
def adapt_glob(regex):
"""
Supply legacy expectation on Python 3.5
"""
if sys.version_info > (3, 6):
return regex
return regex.replace('(?s:', '').replace(r')\Z', r'\Z(?ms)')
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