While looking for leaked resources (threads) after shutdown and before restart
we in some cases get an assertion in the python threading module where we find
a thread marked as running at the python level but it has no associated thread
at the C level.
* Ignore permission errors on setpgid.
When launched in a docker container we got a permission denied error
from setpgid.
* Don't fail if we find our own pidfile.
When we restart using exec we are running a new instance of home-assistant with
the same process id so we shouldn't be surprised to find an existing pidfile in
that case.
* Allow restart to work when started as python -m homeassistant.
When we are started with `python -m homeassistant`, the restart command line
becomes `python /path/to/hass/homeassistant/__main__.py`. But in that case the
python path includes `/path/to/hass/homeassistant` instead of `/path/to/hass`
and we fail on the first import.
Fix this by recognizing `/__main__.py` as part of the first argument and
injecting the proper path as PYTHONPATH environment before we start the new
home-assistant instance.
* Allow for restart without using parent/child processes.
Assuming that we normally correctly shut down running threads and
release resources, we just do some minimal scrubbing of open file
descriptors and child processes which would stay around across an
exec() boundary.
* Use sys.executable instead of multiprocessing.spawn.get_executable()
* Limit how many file descriptors we try to close.
Don't even try to close on OSX/Darwin until we figure out how to
recognize guarded fds because the kernel will yell at us, and kill
the process.
* Use the close on exec flag on MacOS to clean up.
* Introduce a small process runner to handle restart on windows.
* Handle missing signal.SIGHUP on Windows.
1. Moved RESTART_EXIT_CODE to constants so it can safely be used by
__main__.py.
2. Allowed __main__/main to return the desired exit code.
3. Forwarded the child processes exit code to the parent process to be
duplicated.
4. Added —debug flag to pass command to force Home Assistant to run in
only one process. A warning is printed to STDERR to indicate HASS is in
debug mode. Another is printed if HASS requests a restart in debug
mode. A restart request in debug mode will quit.
5. Added an argument to __main__/main/setup_and_run_hass to indicate
that it is running in the top process. This tells it to return the exit
code rather than exiting.
Implemented an OS and environment safe restart service. This works by
running Home Assistant in a child process. If the child process
terminates with an exit code > 0, HASS is restarted. SIGTERM and
KeyboardInterrupts to the parent process are forwarded to the child
process. KeyboardInterrupts will only be forwarded once. The second
KeyboardInterrupt will be handled by the parent.
Since the requirements only change when the software is updated,
this adds a command line switch to disable pip installs on
startup. The default behavior is maintained when the switch is
not specified. Skipping pip helps a lot with startup on older RPi
hardware.
Created three additional flags for the hass command:
-v - Toggle verbose log file output
—pid-file - Specify PID file path
—daemon - Launch as daemon (nix only)
The core now binds to SIGQUIT on nix systems to trigger a clean
shutdown.
Modified HTTP server to write logging messages through the logging
module.
Rewrote imports of exceptions to be from the exceptions module.
Made nmap scanner check for libnmap dependency without crashing.
Various flake8 and pylint updates.
