local-ai: use cmake to install grpc-server

      cd examples

      cp -r --no-preserve=mode ${src}/backend/cpp/llama grpc-server

      cp llava/clip.* llava/llava.* grpc-server

      echo "add_subdirectory(grpc-server)" >> CMakeLists.txt

      printf "\nadd_subdirectory(grpc-server)" >> CMakeLists.txt

      cp ${src}/backend/backend.proto grpc-server

      sed -i grpc-server/CMakeLists.txt \

        -e '/get_filename_component/ s;[.\/]*backend/;;'

        -e '/get_filename_component/ s;[.\/]*backend/;;' \

        -e '$a\install(TARGETS ''${TARGET} RUNTIME)'

      cd ..

    '';

    cmakeFlags = prev.cmakeFlags ++ [

      (lib.cmakeBool "BUILD_SHARED_LIBS" false)

    ];

    installPhase = ''

      install -Dt $out/bin bin/grpc-server

    '';

    buildInputs = prev.buildInputs ++ [

      protobuf # provides also abseil_cpp as propagated build input

      grpc

          -e 's, && git checkout.*,,g' \

          -e '/mod download/ d' \

        ${cp} ${llama-cpp-grpc}/bin/grpc-server backend/cpp/llama

        ${cp} ${llama-cpp-grpc}/bin/*grpc-server backend/cpp/llama/grpc-server

        echo "grpc-server:" > backend/cpp/llama/Makefile

      ''

    ;