push sheeet

pkgs/development/tools/ocaml/cppo/default.nix

@@ -0,0 +1,80 @@
+{
+  lib,
+  stdenv,
+  fetchFromGitHub,
+  ocaml,
+  findlib,
+  ocamlbuild,
+  buildDunePackage,
+}:
+
+let
+  pname = "cppo";
+
+  meta = with lib; {
+    description = "C preprocessor for OCaml";
+    mainProgram = "cppo";
+    longDescription = ''
+      Cppo is an equivalent of the C preprocessor targeted at the OCaml language and its variants.
+    '';
+    homepage = "https://github.com/ocaml-community/${pname}";
+    maintainers = [ maintainers.vbgl ];
+    license = licenses.bsd3;
+  };
+
+in
+
+if lib.versionAtLeast ocaml.version "4.02" then
+
+  buildDunePackage rec {
+    inherit pname;
+    version = "1.8.0";
+
+    src = fetchFromGitHub {
+      owner = "ocaml-community";
+      repo = pname;
+      rev = "v${version}";
+      hash = "sha256-+HnAGM+GddYJK0RCvKrs+baZS+1o8Yq+/cVa3U3nFWg=";
+    };
+
+    doCheck = true;
+
+    inherit meta;
+  }
+
+else
+
+  let
+    version = "1.5.0";
+  in
+
+  stdenv.mkDerivation {
+
+    name = "${pname}-${version}";
+
+    src = fetchFromGitHub {
+      owner = "mjambon";
+      repo = pname;
+      rev = "v${version}";
+      sha256 = "1xqldjz9risndnabvadw41fdbi5sa2hl4fnqls7j9xfbby1izbg8";
+    };
+
+    strictDeps = true;
+
+    nativeBuildInputs = [
+      ocaml
+      findlib
+      ocamlbuild
+    ];
+
+    inherit meta;
+
+    createFindlibDestdir = true;
+
+    makeFlags = [ "PREFIX=$(out)" ];
+
+    preBuild = ''
+      mkdir -p $out/bin
+    '';
+
+  }

pkgs/development/tools/ocaml/cppo/ocamlbuild.nix

@@ -0,0 +1,25 @@
+{
+  lib,
+  buildDunePackage,
+  cppo,
+  ocamlbuild,
+}:
+
+if lib.versionOlder (lib.getVersion cppo) "1.6" then
+  cppo
+else
+
+  buildDunePackage {
+    pname = "cppo_ocamlbuild";
+
+    inherit (cppo) version src;
+
+    minimalOCamlVersion = "4.03";
+    duneVersion = "3";
+
+    propagatedBuildInputs = [ ocamlbuild ];
+
+    meta = cppo.meta // {
+      description = "Plugin to use cppo with ocamlbuild";
+    };
+  }