1 files changed, 65 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/compilers/reason/default.nix b/nixpkgs/pkgs/development/compilers/reason/default.nix
new file mode 100644
index 000000000000..954c58718cf3
--- /dev/null
+++ b/nixpkgs/pkgs/development/compilers/reason/default.nix
@@ -0,0 +1,65 @@
+{ lib, callPackage, stdenv, makeWrapper, fetchurl, ocaml, findlib, dune_3
+, ncurses
+, fix, menhir, menhirLib, menhirSdk, merlin-extend, ppxlib, utop, cppo, ppx_derivers
+, dune-build-info
+}:
+
+stdenv.mkDerivation rec {
+  pname = "ocaml${ocaml.version}-reason";
+  version = "3.11.0";
+
+  src = fetchurl {
+    url = "https://github.com/reasonml/reason/releases/download/${version}/reason-${version}.tbz";
+    hash = "sha256-pYg38Up58EfI65nVUYrrFu5kNTV0KGz9WyhMmKGiclA=";
+  };
+
+  strictDeps = true;
+  nativeBuildInputs = [
+    makeWrapper
+    menhir
+    ocaml
+    menhir
+    cppo
+    dune_3
+    findlib
+  ];
+
+  buildInputs = [
+    dune-build-info
+    fix
+    menhirSdk
+    ppxlib
+    utop
+  ] ++ lib.optional (lib.versionOlder ocaml.version "4.07") ncurses;
+
+  propagatedBuildInputs = [
+    menhirLib
+    merlin-extend
+    ppx_derivers
+  ];
+
+  buildFlags = [ "build" ]; # do not "make tests" before reason lib is installed
+
+  installPhase = ''
+    runHook preInstall
+    dune install --prefix=$out --libdir=$OCAMLFIND_DESTDIR
+    wrapProgram $out/bin/rtop \
+      --prefix PATH : "${utop}/bin" \
+      --prefix CAML_LD_LIBRARY_PATH : "$CAML_LD_LIBRARY_PATH" \
+      --prefix OCAMLPATH : "$OCAMLPATH:$OCAMLFIND_DESTDIR"
+    runHook postInstall
+  '';
+
+  passthru.tests = {
+    hello = callPackage ./tests/hello { };
+  };
+
+  meta = with lib; {
+    homepage = "https://reasonml.github.io/";
+    downloadPage = "https://github.com/reasonml/reason";
+    description = "Facebook's friendly syntax to OCaml";
+    license = licenses.mit;
+    inherit (ocaml.meta) platforms;
+    maintainers = with maintainers; [ ];
+  };
+}