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#!/usr/bin/python3
# Copyright 2023 Collabora Ltd.
# Copyright 2024 Simon McVittie
# SPDX-License-Identifier: MIT
import os
import subprocess
import sys
import sysconfig
from typing import NoReturn
CAN_RUN = '@CAN_RUN@'
DEB_HOST_ARCH = '@DEB_HOST_ARCH@'
DEB_HOST_GNU_TYPE = '@DEB_HOST_GNU_TYPE@'
DEB_HOST_MULTIARCH = '@DEB_HOST_MULTIARCH@'
TOOL = '@TOOL@'
TOOL_PATH = '@TOOL_PATH@'
ME = f'{DEB_HOST_GNU_TYPE}-{TOOL}'
class CrossGirTool:
def __init__(
self,
argv: list[str],
) -> None:
self.argv = argv
def can_run(self) -> bool:
python_arch = sysconfig.get_config_var('MULTIARCH')
if python_arch == DEB_HOST_MULTIARCH:
# Common case: if python3 is already an executable of the desired
# architecture, then trivially we can run it
return True
try:
completed = subprocess.run(
[CAN_RUN],
check=False,
stdout=subprocess.PIPE,
stderr=subprocess.DEVNULL,
)
except OSError:
return False
else:
return completed.stdout == b'ok\n' and completed.returncode == 0
def get_wrapper(self) -> str:
return f'{DEB_HOST_GNU_TYPE}-cross-exe-wrapper'
def exec(self) -> NoReturn:
exe_wrapper = []
if not self.can_run():
print(
(f'{ME}: Cannot run {DEB_HOST_ARCH} executables '
+ 'directly, using cross-exe-wrapper'),
file=sys.stderr,
)
exe_wrapper = [self.get_wrapper()]
argv = exe_wrapper + [TOOL_PATH] + sys.argv[1:]
try:
os.execvp(argv[0], argv)
except OSError:
print(f'{ME}: Unable to run: {argv}')
raise
if __name__ == '__main__':
CrossGirTool(sys.argv).exec()
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