ressiboot is a fork of goofiboot - which is now dead upstream.
This fork is now being used for RESS Linux (and anyone else if they're interested) because we need the full features of gummiboot, outside of the context of systemd.
It's been stated on several occassions that systemd-boot is "not a direct successor", and "systemd-boot does not support some of the features gummiboot supported". As such, this fork becomes a separate and independent bootloader.
ressiboot is available under the same license as goofiboot, the GNU Lesser General Public License 2.1 (LGPL-2.1)
ressiboot executes EFI images. The default entry is selected by a configured pattern (glob) or an on-screen menu.
ressiboot operates on the EFI System Partition (ESP) only. Configuration file fragments, kernels, initrds, other EFI images need to reside on the ESP. Linux kernels must be built with CONFIG_EFI_STUB to be able to be directly executed as an EFI image.
ressiboot reads simple and entirely generic configuration files; one file per boot entry to select from.
Pressing Space (or most other) keys during bootup will show an on-screen menu with all configured entries to select from. Pressing enter on the selected entry loads and starts the EFI image.
If no timeout is configured and no key pressed during bootup, the default entry is booted right away.