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:doc.html
            supplies   file:doc.pdf
            supplies   file:plan.py
            supplies   step:./plan.py
            supplies   step:weasyprint doc.html doc.pdf

step:./plan.py
             workdir = ./
             command = ./plan.py
               state = SUCCEEDED
          created by   root:
            consumes   file:./
            consumes   file:plan.py
             creates   file:doc.html
             creates   step:weasyprint doc.html doc.pdf

file:doc.html
                path = doc.html
               state = STATIC
          created by   step:./plan.py
            consumes   file:./
            supplies   step:weasyprint doc.html doc.pdf

step:weasyprint doc.html doc.pdf
             workdir = ./
             command = weasyprint doc.html doc.pdf
               state = SUCCEEDED
          created by   step:./plan.py
            consumes   file:./
            consumes   file:doc.html
             creates   file:doc.pdf
            supplies   file:doc.pdf

file:doc.pdf
                path = doc.pdf
               state = BUILT
          created by   step:weasyprint doc.html doc.pdf
            consumes   file:./
            consumes   step:weasyprint doc.html doc.pdf
