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#!/usr/bin/env python3
# Copyright 2014 the V8 project authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""This program wraps an arbitrary command since gn currently can only execute
scripts."""
import subprocess
import sys
from pathlib import Path
# The first two arguments can be used to specify a file to redirect the
# stdout to.
cmd = sys.argv[1:]
kwargs = {}
stdout_file = None
if cmd and cmd[0] == '--redirect-stdout':
stdout_file = Path(cmd[1])
kwargs = dict(stdout=subprocess.PIPE)
cmd = cmd[2:]
# Debian cross-build support
import os
wrapper_env = os.environ.get('HOST_EXEC_WRAPPER')
if wrapper_env:
cmd[0:0] = wrapper_env.split()
process = subprocess.Popen(cmd, **kwargs)
stdout, _ = process.communicate()
if stdout_file:
with stdout_file.open('w') as f:
f.write(stdout.decode('utf-8'))
result = process.returncode
if result != 0:
# Windows error codes such as 0xC0000005 and 0xC0000409 are much easier
# to recognize and differentiate in hex.
if result < -100:
# Print negative hex numbers as positive by adding 2^32.
print('Return code is %08X' % (result + 2**32))
else:
print('Return code is %d' % result)
sys.exit(result)
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