depot_tools/android_build_server_helper.py

# Copyright 2024 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.

import contextlib
import os
import sys
import signal
import subprocess

import gclient_paths


def _register_build_id(local_dev_server_path, build_id):
    subprocess.run([
        local_dev_server_path, '--register-build-id', build_id, '--builder-pid',
        str(os.getpid())
    ])


def _print_status(local_dev_server_path, build_id):
    subprocess.run([local_dev_server_path, '--print-status', build_id])


def _get_server_path():
    src_dir = gclient_paths.GetPrimarySolutionPath()
    return os.path.join(src_dir, 'build/android/fast_local_dev_server.py')


def _set_signal_handler(local_dev_server_path, build_id):
    original_sigint_handler = signal.getsignal(signal.SIGINT)

    def _kill_handler(signum, frame):
        # Cancel the pending build tasks if user CTRL+c early.
        print('Canceling pending build_server tasks', file=sys.stderr)
        subprocess.run([local_dev_server_path, '--cancel-build', build_id])
        original_sigint_handler(signum, frame)

    signal.signal(signal.SIGINT, _kill_handler)


def _start_server(local_dev_server_path):
    subprocess.Popen([local_dev_server_path, '--exit-on-idle', '--quiet'],
                     start_new_session=True)


def _set_tty_env():
    stdout_name = os.readlink('/proc/self/fd/1')
    os.environ.setdefault("AUTONINJA_STDOUT_NAME", stdout_name)


@contextlib.contextmanager
def build_server_context(build_id, use_android_build_server=False):
    if not use_android_build_server:
        yield
        return
    _set_tty_env()
    server_path = _get_server_path()
    _start_server(server_path)
    # Tell the build server about us.
    _register_build_id(server_path, build_id)
    _set_signal_handler(server_path, build_id)
    yield
    _print_status(server_path, build_id)