tlaternet-webserver/flake.nix

{
  description = "tlater.net web server";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-22.05";
    rust-overlay = {
      url = "github:oxalica/rust-overlay";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    naersk = {
      url = "github:nmattia/naersk";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    tlaternet-templates = {
      url = "git+https://gitea.tlater.net/tlaternet/tlaternet.git";
      # No need to override anything here; we can save some downloads
      # if we rely on the webserver to do that.
    };
  };

  outputs = {
    self,
    nixpkgs,
    rust-overlay,
    naersk,
    tlaternet-templates,
  }: let
    # At the moment, we only deploy to x86_64-linux. Update when we
    # care about another platform.
    system = "x86_64-linux";
    overlays = [
      rust-overlay.overlays.default
    ];
    pkgs = import nixpkgs {inherit system overlays;};

    # Rust build config
    rust-toolchain = pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;
    naersk-lib = naersk.lib.${system}.override {
      cargo = rust-toolchain;
      rustc = rust-toolchain;
    };
    buildInputs = with pkgs; [
      pkg-config
      openssl
    ];
  in {
    packages.${system} = rec {
      tlaternet-webserver = naersk-lib.buildPackage {
        inherit buildInputs;
        pname = "tlaternet-webserver";
        root = pkgs.lib.cleanSource self;
      };
      default = tlaternet-webserver;
    };

    apps.${system} = {
      run-with-templates = let
        script = pkgs.writeShellScriptBin "run-with-templates" ''
          export ROCKET_TEMPLATE_DIR=${tlaternet-templates.packages.${system}.tlaternet-templates}
          ${self.packages.${system}.tlaternet-webserver}/bin/tlaternet-webserver
        '';
      in {
        type = "app";
        program = "${script}/bin/run-with-templates";
      };
    };

    devShells.${system} = {
      default = pkgs.mkShell {
        packages = builtins.concatLists [
          buildInputs
          [
            (rust-toolchain.override {
              extensions = ["rust-src" "rust-analysis" "rust-analyzer-preview"];
            })
          ]
        ];
      };
    };
  };
}