OpenGrok

// These partial variants assign Shift to various XKB keycodes.

// The Less/Greater key (while pressed) chooses the second shift level.
partial modifier_keys
xkb_symbols "lsgt_switch" {
  key <LSGT> {
    type[Group1]="ONE_LEVEL",
    symbols[Group1] = [ Shift_L ]
  };
};