tvl-depot/third_party/nix/default.nix
Vincent Ambo 0064e55486 feat(3p/nix): Add protobuf & gRPC dependencies and generate sources
Adds dependencies on the gRPC & protobuf libraries, and implements Nix
code to generate the C++ sources from the included proto definitions.

This is theoretically supported via CMake, but practically doesn't
work and I don't care to debug why.

Doing it like this lets us instead add a CMake library target for our
proto definitions based on the sources generated by Nix.

Pros:
  * no need to deal with the gRPC CMake mess
  * it works!

Cons: * iteration requires nix-shell restart
Change-Id: Ie1fe9807fc96c49cb8f7161ba59d093456062b15
Reviewed-on: https://cl.tvl.fyi/c/depot/+/927
Tested-by: BuildkiteCI
Reviewed-by: isomer <isomer@tvl.fyi>
2020-07-05 19:17:12 +00:00

93 lines
2.3 KiB
Nix

{ pkgs ? (import ../.. {}).third_party
, buildType ? "release", ... }:
let
aws-s3-cpp = pkgs.aws-sdk-cpp.override {
apis = ["s3" "transfer"];
customMemoryManagement = false;
};
# TODO(tazjin): this is copied from the original derivation, but what
# is it for?
largeBoehm = pkgs.boehmgc.override {
enableLargeConfig = true;
};
src = ./.;
# Proto generation in CMake is theoretically possible, but that is
# very theoretical - this does it in Nix instead.
protoSrcs = pkgs.runCommand "nix-proto-srcs" {} ''
export PROTO_SRCS=${src}/src/proto
mkdir -p $out/libproto
${pkgs.protobuf}/bin/protoc -I=$PROTO_SRCS \
--cpp_out=$out/libproto \
--plugin=protoc-gen-grpc=${pkgs.grpc}/bin/grpc_cpp_plugin --grpc_out=$out/libproto \
$PROTO_SRCS/*.proto
'';
in pkgs.llvmPackages.libcxxStdenv.mkDerivation {
pname = "tazjix";
version = "2.3.4";
inherit src;
nativeBuildInputs = with pkgs; [
bison
clang-tools
cmake
pkgconfig
libxml2
libxslt
(import ./clangd.nix pkgs)
];
# TODO(tazjin): Some of these might only be required for native inputs
buildInputs = with pkgs; [
abseil_cpp
aws-s3-cpp
brotli
bzip2
c-ares
curl
editline
flex
glog
grpc
libseccomp
libsodium
openssl
protobuf
sqlite
xz
];
propagatedBuildInputs = with pkgs; [
boost
largeBoehm
];
# Forward the location of the generated Protobuf / gRPC files so
# that they can be included by CMake.
NIX_PROTO_SRCS = protoSrcs;
# Install the various symlinks to the Nix binary which users expect
# to exist.
postInstall = ''
ln -s $out/bin/nix $out/bin/nix-build
ln -s $out/bin/nix $out/bin/nix-channel
ln -s $out/bin/nix $out/bin/nix-collect-garbage
ln -s $out/bin/nix $out/bin/nix-copy-closure
ln -s $out/bin/nix $out/bin/nix-daemon
ln -s $out/bin/nix $out/bin/nix-env
ln -s $out/bin/nix $out/bin/nix-hash
ln -s $out/bin/nix $out/bin/nix-instantiate
ln -s $out/bin/nix $out/bin/nix-prefetch-url
ln -s $out/bin/nix $out/bin/nix-shell
ln -s $out/bin/nix $out/bin/nix-store
mkdir -p $out/libexec/nix
ln -s $out/bin/nix $out/libexec/nix/build-remote
'';
# TODO(tazjin): integration test setup?
# TODO(tazjin): docs generation?
}