82 lines
2.9 KiB
Nix
82 lines
2.9 KiB
Nix
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{ callPackage
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, cmake
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, fetchFromGitHub
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, lib
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, protobuf
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, python3
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, stdenv
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}:
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let
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pythonRuntime = python3.withPackages(ps: [ ps.protobuf ]);
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in stdenv.mkDerivation rec {
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pname = "nanopb";
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version = "0.4.1";
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src = fetchFromGitHub {
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owner = pname;
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repo = pname;
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rev = version;
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sha256 = "16zxk42wzn519bpxf4578qn97k0h1cnbkvqqkqvka9sl0n3lz2dp";
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};
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nativeBuildInputs = [ cmake python3 ];
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cmakeFlags = [
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"-DBUILD_SHARED_LIBS=ON" # generate $out/lib/libprotobuf-nanopb.so{.0,}
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"-DBUILD_STATIC_LIBS=ON" # generate $out/lib/libprotobuf-nanopb.a
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"-Dnanopb_PROTOC_PATH=${protobuf}/bin/protoc"
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];
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# On a case-insensitive filesystem (such as on Darwin), CMake fails to create
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# the build directory because of the existence of the BUILD file.
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# TODO: This can be removed once https://github.com/nanopb/nanopb/pull/537 is merged.
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preConfigure = "rm BUILD";
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# install the generator which requires Python3 with the protobuf package. It
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# also requires the nanopb module that's generated by CMake to be in a
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# relative location to the generator itself so we move it out of the
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# python.sitePackages into the shared generator folder.
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postInstall = ''
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mkdir -p $out/share/nanopb/generator/proto
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cp ../generator/nanopb_generator.py $out/share/nanopb/generator/nanopb_generator.py
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cp ../generator/proto/_utils.py $out/share/nanopb/generator/proto/_utils.py
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cp ../generator/proto/nanopb.proto $out/share/nanopb/generator/proto/nanopb.proto
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mv $out/${python3.sitePackages}/nanopb_pb2.py $out/share/nanopb/generator/proto
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rm -rf $out/${python3.sitePackages}
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mkdir $out/bin
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substitute ${./protoc-gen-nanopb} $out/bin/protoc-gen-nanopb \
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--subst-var-by python ${pythonRuntime}/bin/python \
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--subst-var-by out $out
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chmod +x $out/bin/protoc-gen-nanopb
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'';
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meta = with lib; {
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inherit (protobuf.meta) platforms;
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description = "Protocol Buffers with small code size";
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homepage = "https://jpa.kapsi.fi/nanopb/";
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license = licenses.zlib;
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maintainers = with maintainers; [ kalbasit ];
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longDescription = ''
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Nanopb is a small code-size Protocol Buffers implementation in ansi C. It
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is especially suitable for use in microcontrollers, but fits any memory
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restricted system.
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- Homepage: jpa.kapsi.fi/nanopb
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- Documentation: jpa.kapsi.fi/nanopb/docs
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- Downloads: jpa.kapsi.fi/nanopb/download
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- Forum: groups.google.com/forum/#!forum/nanopb
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In order to use the nanopb options in your proto files, you'll need to
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tell protoc where to find the nanopb.proto file.
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You can do so with the --proto_path (-I) option to add the directory
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''${nanopb}/share/nanopb/generator/proto like so:
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protoc --proto_path=. --proto_path=''${nanopb}/share/nanopb/generator/proto --plugin=protoc-gen-nanopb=''${nanopb}/bin/protoc-gen-nanopb --nanopb_out=out file.proto
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'';
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};
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}
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