This change converts the appliances from openrc to systemd. In addition,
systemd needs to at least be be installed on the build machine as we now
use systemd-nspawn instead of chroot/bind mounts do to the fact that
systemd-nspawn is much more robust and lese prone to errors. In addition:
* All stage4 tarballs and images are now stored in the images/ directory by
default.
* A package dir is now required and is set up in the packages/ directory by
default.
* The portage directory is not unpacked in the chroot every time anymore
and is instead bind-mounted from a directory by systemd-nspawn. This is
the portage/ directory by default.
* In addition there is a distfiles/ directory (by default) which is
bind-mounted in the chroot. It does what you'd probably expect.
* The Makefile learned new target, eclean, which will run eclean-dist and
eclean-pkg to clean out obsolete distfiles and binary packages.
* The REMOVE_PORTAGE_TREE option is removed as portage is no longer
installed.
* The unused/untested PRUNE_CRITICAL functionality has been removed. I
have no idea if it worked and if it didn't I didn't want to fix it.
* As appliances are always using systemd, UDEV is no longer optional.
* Timezones and hostnames are now handled by systemd (systemd-firstboot).
* Stage4 tarballs are now directly importable as systemd containers (and
probably docker too though I haven't tested that yet).
* A number of packages (for example dhcpd, acpid) have been removed from the
appliances when systemd provides equivalent functionality.
* We no longer override etc-update.conf. There's no reason.
* A number of Makefile targets, checkpoints, temp files, etc have been
removed as they are no longer needed.
I thought I had committed this already. Since appliances/images may be
distributed, we should have bindist set. It only took me nearly 5 years to
fix this bug.
Instead of having everything in the root directory, split them in seperate
directories (appliances, scripts, & configs). This makes things a little
tidier.
Also added a now Makefile target, appliance-list, that prints a list of the
available appliances. The split directory change made this easier.
Albert Hopkins