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:story.txt
            supplies   step:./plan.py
            supplies   step:echo First line. > story.txt; echo Second line. >> story.txt
            supplies   step:grep First story.txt

step:./plan.py
             workdir = ./
             command = ./plan.py
               state = RUNNING
          created by   root:
            consumes   file:./
            consumes   file:plan.py
             creates   step:echo First line. > story.txt; echo Second line. >> story.txt
             creates   step:grep First story.txt

step:echo First line. > story.txt; echo Second line. >> story.txt
             workdir = ./
             command = echo First line. > story.txt; echo Second line. >> story.txt
               state = QUEUED
          created by   step:./plan.py
            consumes   file:./
             creates   file:story.txt
            supplies   file:story.txt

file:story.txt
                path = story.txt
               state = PENDING
          created by   step:echo First line. > story.txt; echo Second line. >> story.txt
            consumes   file:./
            consumes   step:echo First line. > story.txt; echo Second line. >> story.txt
            supplies   step:grep First story.txt

step:grep First story.txt
             workdir = ./
             command = grep First story.txt
               state = PENDING
          created by   step:./plan.py
            consumes   file:./
            consumes   file:story.txt
