LaTeX to LaTeX

It seems that this blog is deviating from its intended purpose before it has actually been used for its intended purpose. I do have a question. It’s just not about math.

Is there a script or program that will take a document consisting of many files (using the \include and \input commands) to produce one file consisting of all of the material from the original many?

I suspect it would not be hard to write one. Given enough time, I’m sure that I could do it myself. I’d rather not reinvent the wheel, however.

Any help would be appreciated.