ocamlformat: init at 0.8

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

@@ -0,0 +1,50 @@
+{ stdenv, fetchFromGitHub, ocamlPackages, dune }:
+
+with ocamlPackages;
+
+if !stdenv.lib.versionAtLeast ocaml.version "4.05"
+then throw "ocamlformat is not available for OCaml ${ocaml.version}"
+else
+
+stdenv.mkDerivation rec {
+  version = "0.8";
+  pname = "ocamlformat";
+  name = "${pname}-${version}";
+
+  src = fetchFromGitHub {
+    owner = "ocaml-ppx";
+    repo = pname;
+    rev = version;
+    sha256 = "1i7rsbs00p43362yv7z7dw0qsnv7vjf630qk676qvfg7kg422w6j";
+  };
+
+  buildInputs = [
+    ocaml
+    dune
+    findlib
+    base
+    cmdliner
+    fpath
+    ocaml-migrate-parsetree
+    stdio
+  ];
+
+  configurePhase = ''
+    patchShebangs tools/gen_version.sh
+    tools/gen_version.sh src/Version.ml version
+  '';
+
+  buildPhase = ''
+    dune build -p ocamlformat
+  '';
+
+  inherit (dune) installPhase;
+
+  meta = {
+    homepage = "https://github.com/ocaml-ppx/ocamlformat";
+    description = "Auto-formatter for OCaml code";
+    maintainers = [ stdenv.lib.maintainers.Zimmi48 ];
+    license = stdenv.lib.licenses.mit;
+    inherit (ocamlPackages.ocaml.meta) platforms;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -7266,6 +7266,8 @@ with pkgs;
 
   ocamlPackages = recurseIntoAttrs ocaml-ng.ocamlPackages;
 
+  ocamlformat = callPackage ../development/tools/ocaml/ocamlformat { };
+
   orc = callPackage ../development/compilers/orc { };
 
   metaocaml_3_09 = callPackage ../development/compilers/ocaml/metaocaml-3.09.nix { };