Is there a CLI for creating the object tree?

I want to write a tool for PG and I would like to recreate the object tree in pgadmin on the disk.  For example.

    db

       schemas

           public

              tables

                  some_table.sql

I looked at the source code and it seems like you guys read the definitions from the DB and then apply a template. This is great and I could rewrite all that in my own code but I was hoping it would be possible to avoid all that work.   Do you guys know of any type of CLI or a library that would help me accomplish this? I also thought of just calling out to pg_dump and then writing a parser for that file but again I would rather take a shortcut if one exists.

Thanks.