The pipeline specification.

Function pipes

Pipe can be any fuction that receives data and set of options and returns data. It’s type signature must be:

(Piper.Data.t, Piper.opts) :: Piper.Data.t

Module pipes

A module pipe is extension of fuction pipe. It is module that must export:

• a call2 function with signature defined above
• an init1 which takes a set of options and initializes it.

The result returned by init/1 is passed as second argument to call/2. Note that init/1 may be called during compilation and as such it must not return pids, ports or values that are not specific to the runtime.

The API expected by a module plug is defined as a behaviour by the Piper module (this module).