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:expensive.py
            supplies   file:final.txt
            supplies   file:initial.txt
            supplies   file:input.txt
            supplies   file:output.txt
            supplies   file:plan.py
            supplies   step:./expensive.py
            supplies   step:./plan.py
            supplies   step:cp -aT initial.txt input.txt
            supplies   step:cp -aT output.txt final.txt

step:./plan.py
             workdir = ./
             command = ./plan.py
               state = SUCCEEDED
          created by   root:
            consumes   file:./
            consumes   file:plan.py
             creates   file:expensive.py
             creates   file:initial.txt
             creates   step:./expensive.py
             creates   step:cp -aT initial.txt input.txt
             creates   step:cp -aT output.txt final.txt

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

file:initial.txt
                path = initial.txt
               state = STATIC
          created by   step:./plan.py
            consumes   file:./
            supplies   step:cp -aT initial.txt input.txt

step:cp -aT initial.txt input.txt
             workdir = ./
             command = cp -aT initial.txt input.txt
               state = SUCCEEDED
          created by   step:./plan.py
            consumes   file:./
            consumes   file:initial.txt
             creates   file:input.txt
            supplies   file:input.txt

file:input.txt
                path = input.txt
               state = BUILT
          created by   step:cp -aT initial.txt input.txt
            consumes   file:./
            consumes   step:cp -aT initial.txt input.txt
            supplies   step:./expensive.py

step:./expensive.py
             workdir = ./
             command = ./expensive.py
               state = SUCCEEDED
          created by   step:./plan.py
            consumes   file:./
            consumes   file:expensive.py
            consumes   file:input.txt
             creates   file:output.txt
            supplies   file:output.txt

file:output.txt
                path = output.txt
               state = BUILT
          created by   step:./expensive.py
            consumes   file:./
            consumes   step:./expensive.py
            supplies   step:cp -aT output.txt final.txt

step:cp -aT output.txt final.txt
             workdir = ./
             command = cp -aT output.txt final.txt
               state = SUCCEEDED
          created by   step:./plan.py
            consumes   file:./
            consumes   file:output.txt
             creates   file:final.txt
            supplies   file:final.txt

file:final.txt
                path = final.txt
               state = BUILT
          created by   step:cp -aT output.txt final.txt
            consumes   file:./
            consumes   step:cp -aT output.txt final.txt
