1 files changed, 90 insertions, 0 deletions
diff --git a/pkgs/development/python-modules/protobuf/3.nix b/pkgs/development/python-modules/protobuf/3.nix
new file mode 100644
index 00000000000..d9e3cce5f91
--- /dev/null
+++ b/pkgs/development/python-modules/protobuf/3.nix
@@ -0,0 +1,90 @@
+{ buildPackages
+, buildPythonPackage
+, fetchpatch
+, isPyPy
+, lib
+, protobuf
+, pytestCheckHook
+, pythonAtLeast
+, tzdata
+}:
+
+assert lib.versionAtLeast protobuf.version "3.21" -> throw "Protobuf 3.20 or older required";
+
+buildPythonPackage {
+  inherit (protobuf) pname src;
+
+  version = protobuf.version;
+
+  sourceRoot = "${protobuf.src.name}/python";
+
+  patches = lib.optionals (pythonAtLeast "3.11") [
+    (fetchpatch {
+      name = "support-python311.patch";
+      url = "https://github.com/protocolbuffers/protobuf/commit/2206b63c4649cf2e8a06b66c9191c8ef862ca519.diff";
+      stripLen = 1; # because sourceRoot above
+      hash = "sha256-3GaoEyZIhS3QONq8LEvJCH5TdO9PKnOgcQF0GlEiwFo=";
+    })
+  ];
+
+  prePatch = ''
+    if [[ "$(<../version.json)" != *'"python": "'"$version"'"'* ]]; then
+      echo "Python library version mismatch. Derivation version: $version, actual: $(<../version.json)"
+      exit 1
+    fi
+  '';
+
+  # Remove the line in setup.py that forces compiling with C++14. Upstream's
+  # CMake build has been updated to support compiling with other versions of
+  # C++, but the Python build has not. Without this, we observe compile-time
+  # errors using GCC.
+  #
+  # Fedora appears to do the same, per this comment:
+  #
+  #   https://github.com/protocolbuffers/protobuf/issues/12104#issuecomment-1542543967
+  #
+  postPatch = ''
+    sed -i "/extra_compile_args.append('-std=c++14')/d" setup.py
+  '';
+
+  nativeBuildInputs = lib.optional isPyPy tzdata;
+
+  buildInputs = [ protobuf ];
+
+  propagatedNativeBuildInputs = [
+    # For protoc of the same version.
+    buildPackages."protobuf${lib.versions.major protobuf.version}_${lib.versions.minor protobuf.version}"
+  ];
+
+  setupPyGlobalFlags = [ "--cpp_implementation" ];
+
+  nativeCheckInputs = [
+    pytestCheckHook
+  ];
+
+  disabledTests = lib.optionals isPyPy [
+    # error message differs
+    "testInvalidTimestamp"
+    # requires tracemalloc which pypy does not implement
+    # https://foss.heptapod.net/pypy/pypy/-/issues/3048
+    "testUnknownFieldsNoMemoryLeak"
+    # assertion is not raised for some reason
+    "testStrictUtf8Check"
+  ];
+
+  pythonImportsCheck = [
+    "google.protobuf"
+    "google.protobuf.internal._api_implementation" # Verify that --cpp_implementation worked
+  ];
+
+  passthru = {
+    inherit protobuf;
+  };
+
+  meta = with lib; {
+    description = "Protocol Buffers are Google's data interchange format";
+    homepage = "https://developers.google.com/protocol-buffers/";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ knedlsepp ];
+  };
+}