root:
             creates   file:./
             creates   file:plan.py
             creates   step:runpy ./plan.py

file:./
               state = STATIC
          created by   root:
            supplies   (file:output.txt)
            supplies   (step:runsh touch output.txt)
            supplies   file:plan.py
            supplies   step:runpy ./plan.py

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

step:runpy ./plan.py
               state = FAILED
             env_var = STEPUP_PATH_FILTER [amended]
          created by   root:
            consumes   file:./
            consumes   file:plan.py

(step:runsh touch output.txt)
               state = SUCCEEDED
           explained = yes
            consumes   file:./
             creates   (file:output.txt)
            supplies   (file:output.txt)

(file:output.txt)
               state = BUILT
          created by   (step:runsh touch output.txt)
            consumes   (step:runsh touch output.txt)
            consumes   file:./
