Peter Hutterer authored Jan 08, 2021 and Sergey Udaltsov committed Feb 16, 2021

The various <I123> keycodes in keycodes/evdev simply match the kernel
defines + offset 8. There is no need to maintain these manually, let's
generate them instead.

Keycodes update rarely and irregularly (on average maybe every second kernel
release) so there's no need to integrate this into the build itself, let's add
it to our CI instead.

The script here uses python-libevdev which  has a list of the various key
codes and their names (compile-time built-in in libevdev itself so it's
advisable that a recent libevdev is used). The script is hooked up to a custom
job that will fail if there are key codes with a #define in the kernel that
are not listed in our evdev file. We allow that job to fail, it's not that
urgent to block any merge requests.

Changes to v1, see commit 5dc9b48c and its revert 8fa3b314

:
- Parse the template for existing defines and alias those keys. e.g.
	alias <I121> = <MUTE>;
- Kernel v5.10 keycodes are now included in the file
- The script defaults to the correct template/keycode file, no commandline
  arguments needed for the default run.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>