Hi!
I’m trying to understand how to define CLI arguments using the new Gtk4 model but I only managed to define non-positional / flagged arguments:
# (...)
class MyApp(Adw.Application):
def __init__(self, *args, **kwargs):
super().__init__(
*args,
application_id="org.example.myapp",
flags=Gio.ApplicationFlags.HANDLES_COMMAND_LINE |
Gio.ApplicationFlags.HANDLES_OPEN,
**kwargs
)
self.connect('activate', self.on_activate)
self.add_main_option(
"test",
ord("t"), # <= This works
GLib.OptionFlags.NONE,
GLib.OptionArg.NONE,
"Command line test",
None,
)
self.add_main_option(
"file",
0, # <= This doesn't
GLib.OptionFlags.NONE,
GLib.OptionArg.FILENAME,
"File to load",
None,
)
def on_activate(self, app):
self.win = MainWindow(application=app)
self.win.present()
def on_quit(self, action, param):
self.quit()
def do_open(self, action, param):
print("Now what")
def do_command_line(self, command_line):
options = command_line.get_options_dict()
options = options.end().unpack()
if "test" in options:
print("Argument: %s" % options["test"])
if "file" in options: # <= And so this never fires
print("Argument: %s" % options["file"])
self.activate()
return 0
app = MyApp()
app.run(sys.argv)
Of course I tried every combination of OptionArg and OptionFlag constants.
This is really hard to google for, given that this API replaced argparse, that itself (If I’m not mistaking) replaced something else before, so there is a lot of stale documentation out there 
I can get the arguments by using
argv = command_line.get_arguments()
self.loaded_file = argv[1]
But that is not right, it’s totally bypassing the GtkApplication logic, and the help is not right:
# ./fwomaj -h
Usage:
fwomaj [OPTION…]
Help Options:
-h, --help Show help options
--help-all Show all help options
--help-gapplication Show GApplication options
Application Options:
-t, --test Command line test
--file Video file to load
It should say
Usage:
fwomaj [OPTION…] FILE
(...)
-t, --test Command line test
FILE Video file to load
So there is really something that I’m missing there.
