I could imagine a bash shell that helps create drake files, by remembering in a richer history structure all files read/modified by subprocesses. (A degenerate

I could imagine a bash shell that helps create drake files, by remembering in a richer history structure all files read/modified by subprocesses. (A degenerate drake file, one line per 'step', would almost be a 1:1 representation of this richer history... though you then might want to coalesce and reorder atomic steps to represent the real shape of your workflow and dependencies.)