I'm using Perforce, if that changes the tune of the answers at all.
I'd like to implement a build process that, when a solution is built in a "release" mode, tags the entire source tree with a label and pushes the output of the build (DLLs, webpages) to a /build/release directory in source control. This directory should always contain the latest complete build, nothing less and nothing more, so I can yank that directory to production servers in its entirety and it's ready to go.
Now say I had a DLL in a previous release that the new build is not supposed to include. Does this mean the best practice for updating that /build/release folder is to check the entire thing out, delete everything in it, add the new build files, and sync it? Sounds like an obvious answer, but I want to make sure I'm not missing some other voodoo that might be a better way to do it.