结合使用ocamlfind和ocaml解释器，无需编译

Question

I have a file main.ml that uses some package that makes the command ocaml main.ml fail and report this error:

Error: Unbound module X

And the only solution I've found so far is to run:

ocamlbuild main.native -use-ocamlfind -package X
./main.native

But this compiles the file. Is there a way to just run the regular ocaml interpreter ( ocaml main.ml ) with some additional flags to make it find the package?

Answer 1

The easiest way is probably to use topfind and add #require "core" at the top of your file. If you want to avoid adding toplevel directives in your file, you can use ocamlfind query -i-format -r to compute the required include directories:

 ocaml $(ocamlfind query -i-format -r core) main.ml

Answer 2

You can put at the beginning of your file some top-level directives which find and load needed modules. For example, when I want to use Core library in my script I insert:

#use "topfind";;
#thread;;
#require "core";;

open Core.Std
(* Code of my script *)

To use topfind package ocamlfind has to be installed ( opam install ocamlfind )

Answer 3

You can also query the path of your package to ocamlfind :

ocamlfind query package_X

That will return the path of your package : /path_to/packageX

And then :

ocaml main.ml -I /path_to/packageX