Remove hardcoded libpython binaries and add debug step

venv/lib/python3.12/site-packages/setuptools/_distutils/spawn.py

@@ -0,0 +1,134 @@
+"""distutils.spawn
+
+Provides the 'spawn()' function, a front-end to various platform-
+specific functions for launching another program in a sub-process.
+"""
+
+from __future__ import annotations
+
+import os
+import platform
+import shutil
+import subprocess
+import sys
+import warnings
+from collections.abc import Mapping, MutableSequence
+from typing import TYPE_CHECKING, TypeVar, overload
+
+from ._log import log
+from .debug import DEBUG
+from .errors import DistutilsExecError
+
+if TYPE_CHECKING:
+    from subprocess import _ENV
+
+
+_MappingT = TypeVar("_MappingT", bound=Mapping)
+
+
+def _debug(cmd):
+    """
+    Render a subprocess command differently depending on DEBUG.
+    """
+    return cmd if DEBUG else cmd[0]
+
+
+def _inject_macos_ver(env: _MappingT | None) -> _MappingT | dict[str, str | int] | None:
+    if platform.system() != 'Darwin':
+        return env
+
+    from .util import MACOSX_VERSION_VAR, get_macosx_target_ver
+
+    target_ver = get_macosx_target_ver()
+    update = {MACOSX_VERSION_VAR: target_ver} if target_ver else {}
+    return {**_resolve(env), **update}
+
+
+@overload
+def _resolve(env: None) -> os._Environ[str]: ...
+@overload
+def _resolve(env: _MappingT) -> _MappingT: ...
+def _resolve(env: _MappingT | None) -> _MappingT | os._Environ[str]:
+    return os.environ if env is None else env
+
+
+def spawn(
+    cmd: MutableSequence[bytes | str | os.PathLike[str]],
+    search_path: bool = True,
+    verbose: bool = False,
+    dry_run: bool = False,
+    env: _ENV | None = None,
+) -> None:
+    """Run another program, specified as a command list 'cmd', in a new process.
+
+    'cmd' is just the argument list for the new process, ie.
+    cmd[0] is the program to run and cmd[1:] are the rest of its arguments.
+    There is no way to run a program with a name different from that of its
+    executable.
+
+    If 'search_path' is true (the default), the system's executable
+    search path will be used to find the program; otherwise, cmd[0]
+    must be the exact path to the executable.  If 'dry_run' is true,
+    the command will not actually be run.
+
+    Raise DistutilsExecError if running the program fails in any way; just
+    return on success.
+    """
+    log.info(subprocess.list2cmdline(cmd))
+    if dry_run:
+        return
+
+    if search_path:
+        executable = shutil.which(cmd[0])
+        if executable is not None:
+            cmd[0] = executable
+
+    try:
+        subprocess.check_call(cmd, env=_inject_macos_ver(env))
+    except OSError as exc:
+        raise DistutilsExecError(
+            f"command {_debug(cmd)!r} failed: {exc.args[-1]}"
+        ) from exc
+    except subprocess.CalledProcessError as err:
+        raise DistutilsExecError(
+            f"command {_debug(cmd)!r} failed with exit code {err.returncode}"
+        ) from err
+
+
+def find_executable(executable: str, path: str | None = None) -> str | None:
+    """Tries to find 'executable' in the directories listed in 'path'.
+
+    A string listing directories separated by 'os.pathsep'; defaults to
+    os.environ['PATH'].  Returns the complete filename or None if not found.
+    """
+    warnings.warn(
+        'Use shutil.which instead of find_executable', DeprecationWarning, stacklevel=2
+    )
+    _, ext = os.path.splitext(executable)
+    if (sys.platform == 'win32') and (ext != '.exe'):
+        executable = executable + '.exe'
+
+    if os.path.isfile(executable):
+        return executable
+
+    if path is None:
+        path = os.environ.get('PATH', None)
+        # bpo-35755: Don't fall through if PATH is the empty string
+        if path is None:
+            try:
+                path = os.confstr("CS_PATH")
+            except (AttributeError, ValueError):
+                # os.confstr() or CS_PATH is not available
+                path = os.defpath
+
+    # PATH='' doesn't match, whereas PATH=':' looks in the current directory
+    if not path:
+        return None
+
+    paths = path.split(os.pathsep)
+    for p in paths:
+        f = os.path.join(p, executable)
+        if os.path.isfile(f):
+            # the file exists, we have a shot at spawn working
+            return f
+    return None