How does !macro rid you of that portability issue? One way or another, you'd need to have a command that does that whole sequence of operations. If it's inline, I'd expect same portability problem (`&&` in Bash corresponds to something else in `.bat`).

You are right, glancing over the Man page I thought you could just specify multiple commands. But it doesn't seem like it. So, my problem persists.

What you could do is use Tup's LUA support (you can write tupfiles and tuprules in LUA, and you can define and use LUA functions in them): have each rule handle just one step of your process, generate the whole necessary DAG of rules, encapsulate all of that in a LUA function defined in tuprules.lua and call that function in tupfile.lua for every diagram you want to generate. One thing that you lose is the ability to use `foreach` with your construction (other than by creating a variant of your constructions that embeds foreachness, or by using tup.glob and iterating).

I specifically wanted to avoid the LUA support. As soon as we get there I'd rather go with Ruby and Rakefiles.