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";
    fenix.url = "github:nix-community/fenix";
  };

  outputs = { self, nixpkgs, utils, fenix }: let
    name = "transbeam";
  in
    utils.lib.eachDefaultSystem
      (system:
        let
          pkgs = import nixpkgs {
            inherit system;
            overlays = [ fenix.overlays.default ];
          };
          fenixStable = fenix.packages.${system}.stable;
          fenixPlatform = pkgs.makeRustPlatform {
            cargo = fenixStable.toolchain;
            rustc = fenixStable.toolchain;
          };
        in rec {
          packages.${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" = let
            cargoTOML = builtins.fromTOML (builtins.readFile ./Cargo.toml);
          in fenixPlatform.buildRustPackage {
            pname = name;
            inherit (cargoTOML.package) version;
            src = ./.;
            cargoLock.lockFile = ./Cargo.lock;
          };

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

          devShell = with pkgs; let
            fenixWith = fenixStable.withComponents [
              "cargo"
              "clippy"
              "rust-src"
              "rustc"
              "rustfmt"
            ];
          in mkShell {
            nativeBuildInputs = [
              stdenv.cc
              fenixWith
              cargo-audit
              cargo-flamegraph
              (python3.withPackages (p: with p; [
                tqdm
                websockets
              ]))
            ];
          };
        }
      );
}