depot/pkgs/development/ocaml-modules/b0/default.nix

{
  lib,
  stdenv,
  fetchurl,
  ocaml,
  findlib,
  topkg,
  ocamlbuild,
  cmdliner,
}:

let

in
lib.throwIfNot (lib.versionAtLeast ocaml.version "4.08")
  "b0 is not available for OCaml ${ocaml.version}"

  stdenv.mkDerivation
  rec {

    pname = "ocaml${ocaml.version}-b0";
    version = "0.0.5";

    src = fetchurl {
      url = "${meta.homepage}/releases/b0-${version}.tbz";
      sha256 = "sha256-ty04JQcP4RCme/VQw0ko2IBebWWX5cBU6nRTTeV1I/I=";
    };

    strictDeps = true;

    nativeBuildInputs = [
      ocaml
      findlib
      ocamlbuild
      topkg
    ];
    buildInputs = [
      topkg
      cmdliner
    ];

    inherit (topkg) buildPhase installPhase;

    meta = with lib; {
      description = "Software construction and deployment kit";
      longDescription = ''
        WARNING this package is unstable and work in progress, do not depend on
        it.
        B0 describes software construction and deployments using modular and
        customizable definitions written in OCaml. B0 describes:
        * Build environments.
        * Software configuration, build and testing.
        * Source and binary deployments.
        * Software life-cycle procedures.
        B0 also provides the B00 build library which provides abitrary build
        abstraction with reliable and efficient incremental rebuilds. The B00
        library can be – and has been – used on its own to devise domain specific
        build systems.
      '';
      homepage = "https://erratique.ch/software/b0";
      inherit (ocaml.meta) platforms;
      license = licenses.isc;
      maintainers = [ maintainers.Julow ];
    };
  }