FreeBSD builder/installer

Features/Notes:

Updates source via CVSup.
Builds world and/or kernel(s).
Installs world and/or kernel(s) in correct order.
Installs multiple kernels in separate directories (KERNCONF) along with a default kernel.
Calls mergemaster for configuration.
Written in Bourne shell.
May be run automatically (needs more testing).

FreeBSD nullfs jail builder

Features/Notes:

ALPHA (but close to BETA) quality! Bugs may be found. I use it on my system all of the time.
Uses Perl.
It does not use /usr/ports/INDEX, therefore, rebuilding that is not required.
All files to be updated are downloaded before the ports are touched.
It should be stricter on following dependencies. It builds a tree internally finding all ports that need to be upgraded or installed before starting.
Crash recovery. A user can continue from where a failure occurs. For example, if a build fails, the program will exit. Fix the build. Start the program back up to continue the upgrade of the system.
It will have deletion support. This is not finished.
Detects (and deletes) dead dependencies. This prevents failures (i.e., pine upgraded from openldap-client21 to openldap-client22 which conflict with each other.
Many options will try to be the same between portupgrade and pc although some exceptions will exist. For example, -R assumes -r. This is part of the stricter dependencies.

Requirements: