push sheeet

pkgs/development/ocaml-modules/trace/default.nix

@@ -0,0 +1,25 @@
+{
+  lib,
+  fetchurl,
+  buildDunePackage,
+}:
+
+buildDunePackage rec {
+  pname = "trace";
+  version = "0.5";
+
+  minimalOCamlVersion = "4.07";
+
+  src = fetchurl {
+    url = "https://github.com/c-cube/ocaml-trace/releases/download/v${version}/trace-${version}.tbz";
+    hash = "sha256-l0NvWPGBd1WR+b50WXEYfptuCUjda8MlZ/o5YngRNIg=";
+  };
+
+  meta = {
+    description = "Common interface for tracing/instrumentation libraries in OCaml";
+    license = lib.licenses.mit;
+    homepage = "https://c-cube.github.io/ocaml-trace/";
+    maintainers = [ lib.maintainers.vbgl ];
+  };
+
+}

pkgs/development/ocaml-modules/trace/tef.nix

@@ -0,0 +1,31 @@
+{
+  buildDunePackage,
+  trace,
+  mtime,
+}:
+
+buildDunePackage {
+  pname = "trace-tef";
+  inherit (trace) src version;
+
+  # This removes the dependency on the “atomic” package
+  # (not available in nixpkgs)
+  # Said package for OCaml ≥ 4.12 is empty
+  postPatch = ''
+    substituteInPlace src/tef/dune --replace 'atomic ' ""
+  '';
+
+  minimalOCamlVersion = "4.12";
+
+  propagatedBuildInputs = [
+    mtime
+    trace
+  ];
+
+  doCheck = true;
+
+  meta = trace.meta // {
+    description = "Simple backend for trace, emitting Catapult JSON into a file";
+  };
+
+}