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"""
Test suite for distutils.
Tests for the command classes in the distutils.command package are
included in distutils.tests as well, instead of using a separate
distutils.command.tests package, since command identification is done
by import rather than matching pre-defined names.
"""
import shutil
from collections.abc import Sequence
def missing_compiler_executable(cmd_names: Sequence[str] = []): # pragma: no cover
"""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, errors, sysconfig
compiler = ccompiler.new_compiler()
sysconfig.customize_compiler(compiler)
if compiler.compiler_type == "msvc":
# MSVC has no executables, so check whether initialization succeeds
try:
compiler.initialize()
except errors.DistutilsPlatformError:
return "msvc"
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, f"the '{name}' executable is not configured"
elif not cmd:
continue
if shutil.which(cmd[0]) is None:
return cmd[0]
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