ogen is a generator of OCaml source of build configuration file.
The configuration file will generate dune configuration file.

Create an opam project file, execute the following command.

ogen opam my_package

By default, an opam file and Makefile are generated.

ls -a
my_package.opam
Makefile

You can use the lib command to generate a build configuration file for the library.
In the example below, we create a dune file named package_xyz in lib/xyz.

ogen lib package_xyz -p package.xyz -o lib/xyz

(library
  (name        package_xyz)
  (public_name package.xyz)
)

You can generate modules using the mod command.
The following example creates a module file named example in lib/xyz.

ogen mod -o lib/xyz example

You can install using opam.
The compiler version of OCaml must be 4.09.0 or higher.

opam switch create 4.09.0
opam pin add ogen https://github.com/holyshared/ogen.git

Install and build the required dependent libraries.

opam install -y dune sexplib sexp_pretty cmdliner ppx_jane ppxlib mustache
make build

The test only executes the test command.

opam install -y dune sexplib sexp_pretty cmdliner ppx_jane ppxlib mustache
make test