root:
             version = v1
             creates   file:./
             creates   file:plan.py
             creates   step:./plan.py

file:plan.py
                path = plan.py
               state = STATIC
          created by   root:
            consumes   file:./
            supplies   step:./plan.py

file:./
                path = ./
               state = STATIC
          created by   root:
            supplies   file:plan.py
            supplies   (file:sub/)
            supplies   step:./plan.py
            supplies   step:mkdir -p sub/blub/pup/

step:./plan.py
             workdir = ./
             command = ./plan.py
               state = SUCCEEDED
          created by   root:
            consumes   file:./
            consumes   file:plan.py
             creates   step:mkdir -p sub/blub/pup/

step:mkdir -p sub/blub/pup/
             workdir = ./
             command = mkdir -p sub/blub/pup/
               state = PENDING
          created by   step:./plan.py
            consumes   file:./
            consumes   (file:sub/blub/)
             creates   file:sub/blub/pup/
            supplies   file:sub/blub/pup/

(file:sub/blub/)
                path = sub/blub/
               state = PENDING
            consumes   (file:sub/)
            supplies   file:sub/blub/pup/
            supplies   step:mkdir -p sub/blub/pup/

(file:sub/)
                path = sub/
               state = PENDING
            consumes   file:./
            supplies   (file:sub/blub/)

file:sub/blub/pup/
                path = sub/blub/pup/
               state = PENDING
          created by   step:mkdir -p sub/blub/pup/
            consumes   (file:sub/blub/)
            consumes   step:mkdir -p sub/blub/pup/
