You can’t run CVS commands within the current WM developer. I have heard from a few people that Developer version 6.5 will have built in hooks for source code management systems, including CVS.
You can run CVS commands from the server with a webMethods service that executes a command line. This could be used in say, in the process of releasing a package, or after making a build in Deployer. But some reverse engineering will be involved there.
#webMethods#Integration-Server-and-ESB#Flow-and-Java-services