root:
             version = v1
             creates   file:../
             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:../
            supplies   file:plan.py
            supplies   file:www/
            supplies   step:./plan.py
            supplies   step:mkdir -p ../public/
            supplies   step:mkdir -p ../public/www/

step:./plan.py
             workdir = ./
             command = ./plan.py
               state = SUCCEEDED
   env_var (amended) = PUBLIC
                     = ROOT
          created by   root:
            consumes   file:./
            consumes   file:plan.py
             creates   file:www/
             creates   file:www/plan.py
             creates   step:./plan.py  # wd=www/
             creates   step:mkdir -p ../public/
             creates   step:mkdir -p ../public/www/

file:www/
                path = www/
               state = STATIC
          created by   step:./plan.py
            consumes   file:./
            supplies   file:www/index.md
            supplies   file:www/plan.py
            supplies   step:./plan.py  # wd=www/
            supplies   step:cp -aT index.md ../../public/www/index.md  # wd=www/

file:www/plan.py
                path = www/plan.py
               state = STATIC
          created by   step:./plan.py
            consumes   file:www/
            supplies   step:./plan.py  # wd=www/

step:mkdir -p ../public/
             workdir = ./
             command = mkdir -p ../public/
               state = SUCCEEDED
          created by   step:./plan.py
            consumes   file:../
            consumes   file:./
             creates   file:../public/
            supplies   file:../public/

file:../
                path = ../
               state = STATIC
          created by   root:
            consumes   file:./
            supplies   file:../public/
            supplies   step:mkdir -p ../public/

file:../public/
                path = ../public/
               state = BUILT
          created by   step:mkdir -p ../public/
            consumes   file:../
            consumes   step:mkdir -p ../public/
            supplies   file:../public/www/
            supplies   step:mkdir -p ../public/www/

step:mkdir -p ../public/www/
             workdir = ./
             command = mkdir -p ../public/www/
               state = SUCCEEDED
          created by   step:./plan.py
            consumes   file:../public/
            consumes   file:./
             creates   file:../public/www/
            supplies   file:../public/www/

file:../public/www/
                path = ../public/www/
               state = BUILT
          created by   step:mkdir -p ../public/www/
            consumes   file:../public/
            consumes   step:mkdir -p ../public/www/
            supplies   file:../public/www/index.md
            supplies   step:cp -aT index.md ../../public/www/index.md  # wd=www/

step:./plan.py  # wd=www/
             workdir = www/
             command = ./plan.py
               state = SUCCEEDED
   env_var (amended) = HERE
                     = PUBLIC
                     = ROOT
          created by   step:./plan.py
            consumes   file:www/
            consumes   file:www/plan.py
             creates   file:www/index.md
             creates   step:cp -aT index.md ../../public/www/index.md  # wd=www/

file:www/index.md
                path = www/index.md
               state = STATIC
          created by   step:./plan.py  # wd=www/
            consumes   file:www/
            supplies   step:cp -aT index.md ../../public/www/index.md  # wd=www/

step:cp -aT index.md ../../public/www/index.md  # wd=www/
             workdir = www/
             command = cp -aT index.md ../../public/www/index.md
               state = SUCCEEDED
          created by   step:./plan.py  # wd=www/
            consumes   file:../public/www/
            consumes   file:www/
            consumes   file:www/index.md
             creates   file:../public/www/index.md
            supplies   file:../public/www/index.md

file:../public/www/index.md
                path = ../public/www/index.md
               state = BUILT
          created by   step:cp -aT index.md ../../public/www/index.md  # wd=www/
            consumes   file:../public/www/
            consumes   step:cp -aT index.md ../../public/www/index.md  # wd=www/
