libmongocrypt: init at 1.7.4

pkgs/development/libraries/libmongocrypt/default.nix

···
+{ stdenv, lib, fetchFromGitHub, fetchpatch, cmake, pkg-config, mongoc, openssl }:
+stdenv.mkDerivation rec {
+  pname = "libmongocrypt";
+  version = "1.7.4";
+
+  src = fetchFromGitHub {
+    owner = "mongodb";
+    repo = pname;
+    rev = version;
+    hash = "sha256-I4KG2BHAovin9EaF8lNzJzucARvi0Qptz5Y9gTt3WkE=";
+  };
+
+  patches = [
+    # fix pkg-config files
+    # submitted upstream: https://github.com/mongodb/libmongocrypt/pull/634
+    (fetchpatch {
+      url = "https://github.com/mongodb/libmongocrypt/commit/5514cf0a366c4d0dc1b0f2a62201f0f1161054da.diff";
+      hash = "sha256-eMSn6MRnc3yKfU2u/Bg3juWiupDzY1DUGi1/HSRftIs=";
+    })
+  ];
+
+  nativeBuildInputs = [ cmake pkg-config ];
+  buildInputs = [ mongoc openssl ];
+
+  cmakeFlags = [
+    # all three of these are required to use system libbson
+    "-DUSE_SHARED_LIBBSON=ON"
+    "-DMONGOCRYPT_MONGOC_DIR=USE-SYSTEM"
+    "-DENABLE_ONLINE_TESTS=OFF"
+
+    # this pulls in a library we don't have
+    "-DMONGOCRYPT_ENABLE_DECIMAL128=OFF"
+
+    # this avoids a dependency on Python
+    "-DBUILD_VERSION=${version}"
+  ];
+
+  meta = with lib; {
+    description = "Required C library for client-side and queryable encryption in MongoDB";
+    homepage = "https://github.com/mongodb/libmongocrypt";
+    license = licenses.asl20;
+    platforms = platforms.unix;
+  };
+}

pkgs/top-level/all-packages.nix

···
 
   libmongo-client = callPackage ../development/libraries/libmongo-client { };
 
+  libmongocrypt = callPackage ../development/libraries/libmongocrypt { };
+
   libmesode = callPackage ../development/libraries/libmesode { };
 
   libmsym = callPackage ../development/libraries/science/chemistry/libmsym { };