transbeam/flake.nix

{
  description = "transbeam: a low-latency file drop web app";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    utils.url = "github:numtide/flake-utils";
    rust-overlay.url = "github:oxalica/rust-overlay";
    crate2nix = {
      url = "github:kolloch/crate2nix";
      flake = false;
    };
  };

  outputs = { self, nixpkgs, utils, rust-overlay, crate2nix }: let
    name = "transbeam";
  in
    utils.lib.eachDefaultSystem
      (system:
        let
          pkgs = import nixpkgs {
            inherit system;
            overlays = [
              rust-overlay.overlays.default
              (final: prev: {
                rustc = final.rust-bin.stable.latest.default;
                cargo = final.rust-bin.stable.latest.default;
              })
            ];
          };
          inherit (import "${crate2nix}/tools.nix" { inherit pkgs; })
            generatedCargoNix;
          project = import
            (generatedCargoNix {
              inherit name;
              src = ./.;
            })
            { inherit pkgs; };
        in rec {
          packages.${name} = pkgs.symlinkJoin {
            inherit name;
            paths = [ packages."${name}-unwrapped" ];
            buildInputs = [ pkgs.makeWrapper ];
            postBuild = ''
              wrapProgram $out/bin/${name} \
                --set TRANSBEAM_STATIC_DIR ${./static} \
                --set TRANSBEAM_CACHEBUSTER ${builtins.substring 0 8 (builtins.hashString "sha256" (toString ./static))}
            '';
          };

          defaultPackage = packages.${name};

          packages."${name}-unwrapped" = project.rootCrate.build;

          packages."${name}-cli" = with pkgs.python3Packages; buildPythonApplication {
            pname = "${name}-cli";
            version = "0.1";
            propagatedBuildInputs = [
              tqdm
              websockets
            ];
            src = ./cli;
          };

          devShell = pkgs.mkShell {
            nativeBuildInputs = with pkgs; [
              stdenv.cc
              rustc
              cargo
              cargo-audit
              cargo-flamegraph
              (python3.withPackages (p: with p; [
                tqdm
                websockets
              ]))
            ];
            RUST_SRC_PATH = "${pkgs.rust.packages.stable.rustPlatform.rustLibSrc}";
          };
        }
      );
}