def configure_drop_cache_on_changes(cache):
'''Configure :cache: to be dropped when the Flatpak installation state changes.
This creates a Gio.FileMonitor over each of the configured Flatpak
installations on the system and drops all caches when they change.
Note that we cannot use the Flatpak API here directly as we are running
from within Flatpak. We are relying on an internal implementation
detail, namely that Flatpak itself will update ".changed" in the
installation directory on state changes.
'''
def _on_installation_changed(*args):
'''Callback for when something changes.'''
del args
cache.clear()
return list(
yield_monitors_over_changed_file_in_paths(
EosCompanionAppService.flatpak_install_dirs(),
_on_installation_changed
)
)
def main(args=None):
'''Entry point function.
Since we're often running from within flatpak, make sure to override
XDG_DATA_DIRS to include the flatpak exports too, since they don't get
included by default.
We use GLib.setenv here, since os.environ is only visible to
Python code, but setting a variable in os.environ does not actually
update the 'environ' global variable on the C side.
'''
flatpak_export_share_dirs = [
os.path.join(d, 'exports', 'share')
for d in EosCompanionAppService.flatpak_install_dirs()
]
GLib.setenv(
'XDG_DATA_DIRS',
os.pathsep.join([GLib.getenv('XDG_DATA_DIRS') or ''] +
flatpak_export_share_dirs), True)
logging.basicConfig(
format='CompanionAppService %(levelname)s: %(message)s',
level=get_log_level())
CompanionAppApplication().run(args or sys.argv)