build -- BuildBot

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http://buildbot.sourceforge.net/manual-0.7.5.html#Introduction

5.1.2 CVSToys - PBService
The CVSToys package provides a server which runs on the machine that hosts the CVS repository it watches. It has a variety of ways to distribute commit notifications, and offers a flexible regexp-based way to filter out uninteresting changes. One of the notification options is named PBService and works by listening on a TCP port for clients. These clients subscribe to hear about commit notifications.
The buildmaster has a CVSToys-compatible PBService client built in. There are two versions of it, one for old versions of CVSToys (1.0.9 and earlier) which used the oldcred authentication framework, and one for newer versions (1.0.10 and later) which use newcred. Both are classes in the buildbot.changes.freshcvs package.