package topkg-jbuilder

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Helpers for using topkg with jbuilder


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Topkg-jbuilder - Helpers for using topkg with jbuilder

Topkg-jbuilder exposes helpers for using topkg-care in projects using Jbuilder.


Topkg-jbuilder provides some default topkg settings that are common to all jbuilder projects, allowing you to use the topkg command line tool in Jbuilder projects.

Note that Topkg-jbuilder only supports the topkg command line tool. Since Jbuilder already handles installation, you don't need to describe the contents of your project in the pkg/ file or replace the build invokcation by ocaml pkg/ build ... as this is usually the case in projects using topkg.

You only need to customize the file with the bits related to the release of your package.



If there is nothing special in your project and you use the topkg defaults, simply add this pkg/ to your project:

#use "topfind"
#require ""

Otherwise use this one and customize the options:

#use "topfind"
#require "topkg-jbuilder"

open Topkg

let () =
  Topkg_jbuilder.describe "<project-name>" ...

For the simple version to work, you need to have the following files:




Additionally, you must have at least one <package>.opam file at the root of your project. If you have multiple ones, the package names must be prefixed by the shortest one, for instance: foo.opam, foo-bar.opam and foo-baz.opam. This prefix is used as project name and will be used to expand the topkg-jbuilder strings in your source files.

This is enough to use the topkg command line tool to create and distribute releases.


As said previously, you don't need to change the build instruction in your <package>.opam files. However, if you want %%ID%% strings to be expanded when your packages in pinned, simply add a call to jbuilder subst:

build: [
  ["jbuilder" "subst"] {pinned}
  ["jbuilder" "build" "-p" name "-j" jobs]

Note that if you have multiple <package>.opam files and they are not all prefixed by the shortest package name, you need to pass a -n option to jbuilder subst:

build: [
  ["jbuilder" "subst" "-n" "foo"] {pinned}
  ["jbuilder" "build" "-p" name "-j" jobs]

Additionally, make sure that there is no version: ... fields in your <package>.opam files, as they will be added automatically by topkg distrib and jbuilder subst.