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:copy1.txt)
            supplies   file:copy2.txt
            supplies   (file:orig.txt)
            supplies   file:plan.py
            supplies   step:./plan.py
            supplies   step:cp copy1.txt copy2.txt
            supplies   (step:cp orig.txt copy1.txt)

step:./plan.py
             workdir = ./
             command = ./plan.py
               state = SUCCEEDED
          created by   root:
            consumes   file:./
            consumes   file:plan.py
             creates   step:cp copy1.txt copy2.txt

(file:orig.txt)
                path = orig.txt
               state = MISSING
            consumes   file:./
            supplies   (step:cp orig.txt copy1.txt)

(step:cp orig.txt copy1.txt)
             workdir = ./
             command = cp orig.txt copy1.txt
               state = PENDING
            consumes   file:./
            consumes   (file:orig.txt)

(file:copy1.txt)
                path = copy1.txt
               state = PENDING
            consumes   file:./
            supplies   step:cp copy1.txt copy2.txt

step:cp copy1.txt copy2.txt
             workdir = ./
             command = cp copy1.txt copy2.txt
               state = PENDING
          created by   step:./plan.py
            consumes   file:./
            consumes   (file:copy1.txt)
             creates   file:copy2.txt
            supplies   file:copy2.txt

file:copy2.txt
                path = copy2.txt
               state = PENDING
          created by   step:cp copy1.txt copy2.txt
            consumes   file:./
            consumes   step:cp copy1.txt copy2.txt
