current-input-source

#!/bin/sh

COMMAND=`cat <<JS
const Gio = imports.gi.Gio;
let settings = new Gio.Settings({ schema: 'org.gnome.desktop.input-sources' });
let current = settings.get_uint('current');
let sources = settings.get_value('sources').get_child_value(current);
let type = sources.get_child_value(0).unpack();
if (type === 'xkb') {
  let layout = sources.get_child_value(1).unpack();
  print('l:' + layout);
} else if (type === 'ibus') {
  let engine = sources.get_child_value(1).unpack();
  print('e:' + engine);
}
JS`

gjs -c "$COMMAND"