gio:application-add-main-option (application long short flags arg desc argdesc)

application -- a g:application instance
long -- a string for the long name of an option used to specify it in a command line
short -- a printable ASCII g:unichar character for the short name of an option
flags -- a g:option-flags value for the flags
arg -- a g:option-arg value for the type of the option
desc -- a string for the description for the option in --help output
argdesc -- a string for the placeholder to use for the extra argument parsed by the option in --help output

Adds an option to be handled by the application. Calling this function is the equivalent of calling the g:application-add-main-option-entries function with a single option entry that has its the arg-data field set to nil.

The parsed arguments will be packed into a g:variant-dict parameter which is passed to the "handle-local-options" signal handler. If the :handles-command-line flag is set, then it will also be sent to the primary instance. See the g:application-add-main-option-entries function for more details.

See the g:option-group-add-entries function for more documentation of the arguments.