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

file:./
               state = STATIC
          created by   root:
            supplies   file:bar.log
            supplies   file:bar.txt
            supplies   file:foo.txt
            supplies   file:plan.py
            supplies   step:runpy ./plan.py
            supplies   step:runpy ./work.py

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

step:runpy ./plan.py
               state = SUCCEEDED
             env_var = STEPUP_PATH_FILTER [amended]
          created by   root:
            consumes   file:./
            consumes   file:plan.py
             creates   file:foo.txt
             creates   step:runpy ./work.py

file:foo.txt
               state = STATIC
          created by   step:runpy ./plan.py
            consumes   file:./
            supplies   step:runpy ./work.py

step:runpy ./work.py
               state = SUCCEEDED
             env_var = INP_VAR_TEST_STEPUP_BAR [amended]
                     = INP_VAR_TEST_STEPUP_FOO [amended]
                     = STEPUP_PATH_FILTER [amended]
          created by   step:runpy ./plan.py
            consumes   file:./
            consumes   file:foo.txt [amended]
             creates   file:bar.log
             creates   file:bar.txt
            supplies   file:bar.log [amended]
            supplies   file:bar.txt [amended]

file:bar.txt
               state = BUILT
          created by   step:runpy ./work.py
            consumes   file:./
            consumes   step:runpy ./work.py

file:bar.log
               state = VOLATILE
          created by   step:runpy ./work.py
            consumes   file:./
            consumes   step:runpy ./work.py
