build/gn_run_binary.py

#!/usr/bin/env python3
# Copyright 2014 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Helper script for GN to run an arbitrary binary. See compiled_action.gni.

Run with:
  python3 gn_run_binary.py <binary_name> [args ...]

Swallows output on success.
"""

import os
import sys
import subprocess


# Run a command, swallowing the output unless there is an error.
def run_command(command):
    try:
        subprocess.check_output(command, stderr=subprocess.STDOUT)
        return 0
    except subprocess.CalledProcessError as e:
        return ("Command failed: " + ' '.join(command) + "\n" + "exitCode: " +
                str(e.returncode) + "\n" + "output: " + _decode(e.output))
    except OSError as e:
        return ("Command failed: " + ' '.join(command) + "\n" + "output: " +
                _decode(e.strerror))


def _decode(bytes):
    return bytes.decode("utf-8")


def main(argv):
    # Unless the path is absolute, this script is designed to run binaries
    # produced by the current build, which is the current working directory when
    # this script is run.
    path = os.path.abspath(argv[1])

    if not os.path.isfile(path):
        print("Binary not found: " + path)
        return 1

    # The rest of the arguments are passed directly to the executable.
    args = [path] + argv[2:]

    result = run_command(args)
    if result != 0:
        print(result)
        return 1
    return 0


if __name__ == '__main__':
    sys.exit(main(sys.argv))