From 2ea2643b13530b53384adf664e4d6af459e8db30 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Merlin=20G=C3=B6ttlinger?= <megoettlinger@gmail.com>
Date: Thu, 1 Aug 2019 10:44:04 +0200
Subject: [PATCH] OCaml build support: add oasis build system

---
 pkgs/build-support/ocaml/oasis.nix | 31 ++++++++++++++++++++++++++++++
 pkgs/top-level/ocaml-packages.nix  |  2 ++
 2 files changed, 33 insertions(+)
 create mode 100644 pkgs/build-support/ocaml/oasis.nix

diff --git a/pkgs/build-support/ocaml/oasis.nix b/pkgs/build-support/ocaml/oasis.nix
new file mode 100644
index 00000000000..2ada920338e
--- /dev/null
+++ b/pkgs/build-support/ocaml/oasis.nix
@@ -0,0 +1,31 @@
+{ buildOcaml, ocaml_oasis }:
+
+{ name, version, buildInputs ? [], ...
+}@args:
+
+buildOcaml (args // {
+  buildInputs = [ ocaml_oasis ] ++ buildInputs;
+
+  buildPhase = ''
+    runHook preBuild
+    oasis setup
+    ocaml setup.ml -configure
+    ocaml setup.ml -build
+    runHook postBuild
+  '';
+
+  checkPhase = ''
+    runHook preCheck
+    ocaml setup.ml -test
+    runHook postCheck
+  '';
+
+  installPhase = ''
+    runHook preInstall
+    mkdir -p $out
+    sed -i s+/usr/local+$out+g setup.ml
+    sed -i s+/usr/local+$out+g setup.data
+    prefix=$OCAMLFIND_DESTDIR ocaml setup.ml -install
+    runHook postInstall
+  '';
+})
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 949c5b6a308..bac8e411bbd 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -12,6 +12,8 @@ let
 
     buildOcaml = callPackage ../build-support/ocaml { };
 
+    buildOasisPackage = callPackage ../build-support/ocaml/oasis.nix { buildOcaml = buildOcaml; };
+
     buildDunePackage = callPackage ../build-support/ocaml/dune.nix {};
 
     alcotest = callPackage ../development/ocaml-modules/alcotest {};