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main: Honor --help and -h

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Use a GOptionContext to display command line options (that are already
handled by e.g. gtk_init anyway).

This turns:

  $ squeekboard -h
  Debug: Tried file "/home/agx/.local/share/squeekboard/keyboards/us.yaml", but it's missing: No such file or directory (os error 2)
  Info: Loaded layout Resource: us
  Debug: Tried file "/home/agx/.local/share/squeekboard/keyboards/us.yaml", but it's missing: No such file or directory (os error 2)
  Info: Loaded layout Resource: us

** (squeekboard:8015): WARNING **: 19:03:13.125: DBus unavailable, unclear how to continue. Is Squeekboard already running?

into the more useful

  $ squeekboard -h
  Usage:
    squeekboard [OPTION…] - A on screen keyboard

  Help Options:
    -h, --help               Show help options
    --help-all               Show all help options
    --help-gtk               Show GTK+ Options

  Application Options:
    --display=DISPLAY        X display to use

...
This commit is contained in:
Guido Günther
2021-11-21 19:29:15 +01:00
parent 6e1faafa2f
commit 359376041d
1 changed files with 15 additions and 0 deletions
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15
src/server-main.c
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@ -250,6 +250,21 @@ session_register(void) {
int
main (int argc, char **argv)
{
g_autoptr (GError) err = NULL;
g_autoptr(GOptionContext) opt_context = NULL;
const GOptionEntry options [] = {
{ NULL, 0, 0, G_OPTION_ARG_NONE, NULL, NULL, NULL }
};
opt_context = g_option_context_new ("- A on screen keyboard");
g_option_context_add_main_entries (opt_context, options, NULL);
g_option_context_add_group (opt_context, gtk_get_option_group (TRUE));
if (!g_option_context_parse (opt_context, &argc, &argv, &err)) {
g_warning ("%s", err->message);
return 1;
}
if (!gtk_init_check (&argc, &argv)) {
g_printerr ("Can't init GTK\n");
exit (1);