cross-shell.nix

# A simplest nix shell file with the project dependencies and
# a cross-compilation support.
{ pkgs, RUSTFLAGS, RUST_LOG, RUST_LOG_FORMAT, RUST_BACKTRACE  }:
pkgs.mkShell rec {
  # Native project dependencies like build utilities and additional routines
  # like container building, linters, etc.
  nativeBuildInputs = with pkgs.pkgsBuildHost; [
    # Rust
    (rust-bin.stable.latest.minimal.override {
      extensions = [ "rustfmt" "clippy" "llvm-tools-preview" "rust-src" ];
    })

    # Will add some dependencies like libiconv
    rustBuildHostDependencies

    # Crate dependencies
    cargoDeps.openssl-sys
    protobuf # required by libp2p

    openssh
  ];
  # Libraries essential to build the service binaries
  buildInputs = with pkgs; [
    # Enable Rust cross-compilation support
    rustCrossHook
  ];
  shellHook = ''
    # Prevent cargo aliases from using programs in `~/.cargo` to avoid conflicts
    # with rustup installations.
    export CARGO_HOME=$HOME/.cargo-nix
  '';
  inherit RUSTFLAGS RUST_LOG RUST_LOG_FORMAT RUST_BACKTRACE;
}