annotate mercurial/testing/ps_util.py @ 52164:e01e84e5e426

rust-revlog: add a Rust-only `InnerRevlog`

This mirrors the Python `InnerRevlog` and will be used in a future patch
to replace said Python implementation. This allows us to start doing more
things in pure Rust, in particular reading and writing operations.

A lot of changes have to be introduced all at once, it wouldn't be very
useful to separate this patch IMO since all of them are either interlocked
or only useful with the rest.

# This python code can be imported into tests in order to terminate a process
# with signal.SIGKILL on posix, or a roughly equivalent procedure on Windows.
import os
import signal
import subprocess
import sys
import tempfile

from .. import (
    encoding,
    pycompat,
)

from ..utils import procutil


def kill_nt(pid: int, exit_code: int):
    fd, pidfile = tempfile.mkstemp(
        prefix=b"sigkill-", dir=encoding.environ[b"HGTMP"], text=False
    )
    try:
        os.write(fd, b'%d\n' % pid)
    finally:
        os.close(fd)

    env = dict(encoding.environ)
    env[b"DAEMON_EXITCODE"] = b"%d" % exit_code

    # Simulate the message written to stderr for this process on non-Windows
    # platforms, for test consistency.
    print("Killed!", file=sys.stderr)

    subprocess.run(
        [
            encoding.environ[b"PYTHON"],
            b"%s/killdaemons.py"
            % encoding.environ[b'RUNTESTDIR_FORWARD_SLASH'],
            pidfile,
        ],
        env=procutil.tonativeenv(env),
    )


def kill(pid: int):
    """Kill the process with the given PID with SIGKILL or equivalent."""
    if pycompat.iswindows:
        exit_code = 128 + 9
        kill_nt(pid, exit_code)
    else:
        os.kill(pid, signal.SIGKILL)