Portsnap

Portsnap
Developer(s) Colin Percival
Operating system FreeBSD
License BSD license

Portsnap is a system written by Colin Percival for secure distribution of compressed, digitally signed snapshots of the FreeBSD ports tree. The distribution follows the client–server model and uses the transport protocol HTTP (pipelined HTTP).

As of FreeBSD 6.0, portsnap is a part of the base system (including 5.5). In previous versions it was installed from ports. It's a standalone program which can be run manually or in a cron job.

As such, it is one of alternatives to the classic cvsup method. Its advantages include:

Another alternative to cvsup is CVSync (used to manage the OpenBSD source tree), it shares cvsup disadvantages, though.

The portsnap package is distributed under the 2-clause BSD license.

References

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