declarative definition of command line interfaces

 It provides a simple and compositional mechanism to convert command
 line arguments to OCaml values and pass them to your functions.
 The module automatically handles syntax errors, help messages and
 UNIX man page generation. It supports programs with single or
 multiple commands (like darcs or git) and respects most of the POSIX
 and GNU conventions.
 .
 This package contains the development modules you need to use Cmdliner
 in your programs.