shell.nix

{ pkgs }:

let
  rust-toolchain =
    with pkgs.fenix;
    combine [
      (stable.withComponents [
        "cargo"
        "clippy"
        "rust-analyzer"
        "rust-src"
        "rustc"
      ])
      (latest.withComponents [ "rustfmt" ])
      targets.wasm32-unknown-unknown.stable.rust-std
    ];
  mold = pkgs.wrapBintoolsWith { bintools = pkgs.mold; };
in
with pkgs;
mkShell.override { stdenv = clangStdenv; } {
  packages = [
    openssl
    pkg-config
    rust-toolchain
  ];

  # use mold as linker on linux x86_64
  CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_LINKER = "clang";
  CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_RUSTFLAGS = "-C link-arg=-fuse-ld=${mold}/bin/ld.mold";

  LIBCLANG_PATH = lib.makeLibraryPath [ llvmPackages.libclang ];
  PROTOC = "${lib.makeBinPath [ protobuf ]}/protoc";
  ROCKSDB_LIB_DIR = lib.makeLibraryPath [ rocksdb ];
  RUST_SRC_PATH = "${rust-toolchain}/lib/rustlib/src/rust/library";
}