Rebar produces the reltool.config configuration file in response to performing the create-node command. The reltool.config contains configuration information consumed by rebar, and Reltool (the release management tool introduced in the Erlang R13B distribution).
Notice: The commands 'create-app' and 'create-node' can be seen in rebar_templater.erl . Also, the variables that may be supplied to these commands can be seen in the respective templates, simpleapp.template and simplenode.template .