Opam package is broken

[Drup]

#require "ppx_core";;
module P = Ppx_core ;;
Error: Reference to undefined global `Ppx_core'

Same deal for compilation, obviously. I don't even understand how your other packages are compiling. :|

[ghost]

It's related to janestreet/ppx_sexp_conv#1. Because ppx_sexp_conv and other deriving plugins depends on ppx_core, ppx_core must have a META that works well with ppx_deriving. That means that ppx_core doesn't behave as a normal library by default...

It will be simpler when ppx_deriving uses ocamlfind directly.

Currently one workaround is to do this:

#predicates "ppx_driver";;
#require "ppx_core";;

However that also means that packages like ppx_sexp_conv will behave as libraries...

#predicates "ppx_driver";;
#require "ppx_sexp_conv";;
# module P = Ppx_sexp_conv;;
module P = Ppx_sexp_conv
# type t = int [@@deriving sexp];;
Cannot locate deriver sexp

[Drup]

Couldn't you have two ocamlfind packages, one deriving-like and one library-like ?

Also, what do I have to put in my _tags to make the whole thing working ?

[ghost]

Couldn't you have two ocamlfind packages, one deriving-like and one library-like ?

I'll try to sort something out for the next release

Also, what do I have to put in my _tags to make the whole thing working ?

If you mean "what is the equivalent of #predicates "ppx_driver";;", it is:

<**/*.ml{,i}>: predicate(ppx_driver)

[Drup]

Ok, thanks!

[Drup]

FYI, I forgot to answer but the right line is:

<*/*.{native,byte}>: predicate(ppx_driver)

This bug is horrible for newcomers, by the way. If you don't solve it, you should at least document it explicitly.

[ghost]

Is the problem still present with the 113.24 release? I changed things so that ppx_deriving plugins depends on ppx_core.for-ppx-deriving...

[mshinwell]

No comment back from the reporter, so assuming fixed.