How is this puppet repository set up?..

Where do I start with looking in puppet?

# Globals & loading specific modules
manifests/site.pp

# Server specific
manifests/nodes/...

# core metacpan stuff is in here
modules/metacpan/

# default loader (which loads everything else)
modules/metacpan/manifests/init.pp

# static files and templates are in
modules/metacpan/files or modules/metacpan/templates

modules/logrotate
modules/nginx
modules/perlbrew

References

http://www.puppetcookbook.com/

puppetmaster --genconfig