Adds ocaml-sqlite3EZ and its dependency ocaml+twt

ocaml+twt is an alternative syntax for OCaml that uses indentation to group
multi-line expressions, like Python and Haskell.

Homepage: http://people.csail.mit.edu/mikelin/ocaml+twt/

sqlite3EZ is a thin wrapper for sqlite3-ocaml with a simplified interface. Query
results are processed with a functional map/fold, transactions are
aborted by exceptions, resource management is handled by the garbage
collector, etc.

Homepage: https://github.com/mlin/ocaml-sqlite3EZ

pkgs/development/ocaml-modules/sqlite3EZ/default.nix

@@ -0,0 +1,23 @@
+{stdenv, fetchurl, ocaml, findlib, twt, ocaml_sqlite3 }:
+
+stdenv.mkDerivation {
+  name = "ocaml-sqlite3EZ-0.1.0";
+
+  src = fetchurl {
+    url = https://github.com/mlin/ocaml-sqlite3EZ/archive/v0.1.0.tar.gz;
+    sha256 = "8ed2c5d5914a65cbd95589ef11bfb8b38a020eb850cdd49b8adce7ee3a563748";
+  };
+
+  buildInputs = [ ocaml findlib twt ];
+
+  propagatedBuildInputs = [ ocaml_sqlite3 ];
+
+  createFindlibDestdir = true;
+
+  meta = {
+    homepage = http://github.com/mlin/ocaml-sqlite3EZ;
+    description = "A thin wrapper for sqlite3-ocaml with a simplified interface";
+    license = stdenv.lib.licenses.mit;
+    platforms = ocaml.meta.platforms;
+  };
+}

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

@@ -0,0 +1,29 @@
+{stdenv, fetchurl, ocaml, findlib }:
+
+stdenv.mkDerivation {
+  name = "ocaml-twt-0.93.2";
+
+  src = fetchurl {
+    url = https://github.com/mlin/twt/archive/v0.93.2.tar.gz;
+    sha256 = "aec091fbd1e6c4d252cf9664237418b4bc8c7d6b7a17475589be78365397e768";
+  };
+
+  buildInputs = [ ocaml findlib ];
+
+  createFindlibDestdir = true;
+
+  configurePhase = ''
+    mkdir $out/bin
+  '';
+
+  installPhase = ''
+    make install PREFIX=$out
+  '';
+
+  meta = {
+    homepage = http://people.csail.mit.edu/mikelin/ocaml+twt/;
+    description = "“The Whitespace Thing” for OCaml";
+    license = stdenv.lib.licenses.mit;
+    platforms = ocaml.meta.platforms;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -3303,6 +3303,10 @@ let
     opam_1_1 = callPackage ../development/tools/ocaml/opam/1.1.nix { };
     opam = opam_1_1;
 
+    sqlite3EZ = callPackage ../development/ocaml-modules/sqlite3EZ { };
+
+    twt = callPackage ../development/ocaml-modules/twt { };
+
     yojson = callPackage ../development/ocaml-modules/yojson { };
 
     zarith = callPackage ../development/ocaml-modules/zarith { };