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Fully set up logging early, and use it in no_other_instance() checks

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This commit is contained in:
Athanasius 2021-01-19 12:21:07 +00:00
parent 7ed90aee83
commit 0530eecc52
1 changed files with 18 additions and 20 deletions
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38
EDMarketConnector.py
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@ -57,6 +57,12 @@ if __name__ == '__main__': # noqa: C901
args = parser.parse_args()
if args.trace:
logger.setLevel(logging.TRACE)
edmclogger.set_channels_loglevel(logging.TRACE)
else:
edmclogger.set_channels_loglevel(logging.DEBUG)
journal_dir: str = config.get('journaldir') or config.default_journal_dir
# This must be at top level to guarantee the file handle doesn't go out
# of scope and get cleaned up, removing the lock with it.
@ -68,22 +74,22 @@ if __name__ == '__main__': # noqa: C901
:returns: True if we are the single instance, else False.
"""
print('no_other_instance_running(): Begin...')
logger.trace('Begin...')
if platform == 'win32':
print('no_other_instance_running(): win32, using msvcrt')
logger.trace('win32, using msvcrt')
# win32 doesn't have fcntl, so we have to use msvcrt
import msvcrt
print(f'no_other_instance_running(): journal_dir_lockfile = {journal_dir_lockfile!r}')
logger.trace(f'journal_dir_lockfile = {journal_dir_lockfile!r}')
locked = False
try:
msvcrt.locking(journal_dir_lockfile.fileno(), msvcrt.LK_NBLCK, 4096)
except Exception as e:
print(f"Exception: Couldn't lock journal directory \"{journal_dir}\""
f", assuming another process running\n{e!r}")
logger.info(f"Exception: Couldn't lock journal directory \"{journal_dir}\""
f", assuming another process running\n{e!r}")
locked = True
if locked:
@ -169,24 +175,25 @@ if __name__ == '__main__': # noqa: C901
return False # Another instance is running
else:
print('no_other_instance_running(): NOT win32, using fcntl')
logger.trace('NOT win32, using fcntl')
try:
import fcntl
except ImportError:
print("Not on win32 and we have no fcntl, can't use a file lock! Allowing multiple instances!")
logger.warning("Not on win32 and we have no fcntl, can't use a file lock!"
"Allowing multiple instances!")
try:
fcntl.flock(journal_dir_lockfile, fcntl.LOCK_EX | fcntl.LOCK_NB)
except Exception as e:
print(f"Exception: Couldn't lock journal directory \"{journal_dir}\","
f"assuming another process running\n{e!r}")
logger.info(f"Exception: Couldn't lock journal directory \"{journal_dir}\","
f"assuming another process running\n{e!r}")
return False
journal_dir_lockfile.write(f"Path: {journal_dir}\nPID: {os_getpid()}\n")
print('no_other_instance_running(): Done')
logger.trace('Done')
return True
def already_running_popup():
@ -215,10 +222,7 @@ if __name__ == '__main__': # noqa: C901
if not no_other_instance_running():
# There's a copy already running.
# Logging isn't set up yet. # TODO: Actually it will be by now in `develop`
# We'll keep this print, but it will be over-written by any subsequent
# write by the already-running process.
print("An EDMarketConnector.exe process was already running, exiting.")
logger.info("An EDMarketConnector.exe process was already running, exiting.")
# To be sure the user knows, we need a popup
already_running_popup()
@ -1246,12 +1250,6 @@ Locale LC_TIME: {locale.getlocale(locale.LC_TIME)}'''
# Run the app
if __name__ == "__main__": # noqa C901
if args.trace:
logger.setLevel(logging.TRACE)
edmclogger.set_channels_loglevel(logging.TRACE)
else:
edmclogger.set_channels_loglevel(logging.DEBUG)
logger.info(f'Startup v{appversion} : Running on Python v{sys.version}')
logger.debug(f'''Platform: {sys.platform} {sys.platform == "win32" and sys.getwindowsversion()}
argv[0]: {sys.argv[0]}