This is a plugin for OpenRC that displays a Plymouth splash screen during boot.
Users of this package are probably on Gentoo; just emerge sys-boot/plymouth-openrc-plugin.
If you're not on Gentoo you'll just need to install OpenRC and Plymouth then build the plugin.
You don't need to set any options on the meson setup invocation, they're just included here for
reference for those that want to change them.
user@workstation $ meson setup builddir --prefix=/usr -Ddebug=true -Dpid-file=/run/plymouth/plymouth-openrc-plugin.pid -Drun-dir=/run/plymouth
user@workstation $ ninja -C builddir
user@workstation $ sudo ninja -C builddir install