root:
             product   file:plan.py
             product   step:./plan.py

file:plan.py
               state = CONFIRMED
             creator   root:
                sink   step:./plan.py

step:./plan.py
               state = SUCCEEDED
                need = PLAN
           using_env = STEPUP_PATH_FILTER [dynamic]
             creator   root:
              source   file:plan.py
             product   file:README.txt
             product   file:inp1.txt
             product   file:sub/info.py
             product   file:sub/inp0.txt
             product   step:./info.py  # wd=sub

file:README.txt
               state = CONFIRMED
             creator   step:./plan.py
                sink   step:./info.py  # wd=sub

file:inp1.txt
               state = CONFIRMED
             creator   step:./plan.py
                sink   step:./info.py  # wd=sub

file:sub/info.py
               state = CONFIRMED
             creator   step:./plan.py
                sink   step:./info.py  # wd=sub

file:sub/inp0.txt
               state = CONFIRMED
             creator   step:./plan.py
                sink   step:./info.py  # wd=sub

step:./info.py  # wd=sub
               state = SUCCEEDED
                need = DEFAULT
           using_env = BAR
                     = EGG [dynamic]
                     = FOO
                     = STEPUP_PATH_FILTER [dynamic]
             creator   step:./plan.py
              source   file:README.txt
              source   file:inp1.txt [dynamic]
              source   file:sub/info.py
              source   file:sub/inp0.txt
             product   file:out0.txt
             product   file:out2.txt
             product   file:sub/out1.txt
             product   file:sub/vol0.txt
             product   file:vol1.txt
             product   file:vol2.txt
                sink   file:out0.txt
                sink   file:out2.txt [dynamic]
                sink   file:sub/out1.txt
                sink   file:sub/vol0.txt
                sink   file:vol1.txt
                sink   file:vol2.txt [dynamic]

file:out0.txt
               state = BUILT
             creator   step:./info.py  # wd=sub
              source   step:./info.py  # wd=sub

file:sub/out1.txt
               state = BUILT
             creator   step:./info.py  # wd=sub
              source   step:./info.py  # wd=sub

file:sub/vol0.txt
               state = VOLATILE
             creator   step:./info.py  # wd=sub
              source   step:./info.py  # wd=sub

file:vol1.txt
               state = VOLATILE
             creator   step:./info.py  # wd=sub
              source   step:./info.py  # wd=sub

file:out2.txt
               state = BUILT
             creator   step:./info.py  # wd=sub
              source   step:./info.py  # wd=sub

file:vol2.txt
               state = VOLATILE
             creator   step:./info.py  # wd=sub
              source   step:./info.py  # wd=sub
