How do you include a file's content / module from a directory in Ocaml ?
└── bin
├── file_1.ml
└── directory
└── file_2.ml
In this example, how do you access file_2 contents in file_1.
I can't figure it out, even though it seems trivial.
You can use include_subdirs to signal to dune that you wish to include subdirectories:
└── bin
├── dune
├── file_1.ml
└── directory
└── file_2.ml
There two different mode of inclusion, unqualified inclusion
; bin/dune file
(include_subdirs unqualified)
(executable (name file_1))
that make all modules from subdirectories available in the main directory namespace:
(* bin/file_1.ml *)
module F2 = File_2
or qualified inclusion
; bin/dune file
(include_subdirs qualified)
(executable (name file_1))
that makes modules from subdirectory at path a/b/c available as A.B.C.File_name:
(* bin/file_1.ml *)
module F2 = Directory.File_2
Another possibility to bind directory contents with dune is to make the directory a local library:
└── bin
├── dune
├── file_1.ml
└── local_lib_dir
├── dune
└── file_2.ml
where the dune file for bin is
; bin/dune
(executable
(name file_1)
(libraries local_lib)
)
and the one in the local directory is
; bin/local_lib_dir/dune
(library
(name local_lib)
)
Then one can use the module defined by file_2 with
(* bin/file_1.ml *)
module F2 = Local_dir.File_2
inside the bin directory.
(* file_2.ml *)
module File2 = struct
(* Define your module contents here *)
end
(* file_1.ml *)
open Directory.File2 (* Assuming "Directory" is the name of the parent directory *)
(* Access the contents of the module *)
