flake.nix: Add deploy-rs for deployment management

flake.nix

@@ -3,6 +3,7 @@
 
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-22.05";
+    deploy-rs.url = "github:serokell/deploy-rs";
     sops-nix = {
       url = "github:Mic92/sops-nix";
       inputs.nixpkgs.follows = "nixpkgs";
@@ -17,6 +18,7 @@
     self,
     nixpkgs,
     sops-nix,
+    deploy-rs,
     tlaternet-webserver,
   }: let
     system = "x86_64-linux";
@@ -56,6 +58,29 @@
       };
     };
 
+    ############################
+    # Deployment configuration #
+    ############################
+    deploy.nodes.tlaternet = {
+      hostname = "tlater.net";
+
+      profiles.system = {
+        user = "root";
+        path = deploy-rs.lib.${system}.activate.nixos self.nixosConfigurations.tlaternet;
+      };
+
+      sshUser = "tlater";
+      sshOpts = ["-t" "-p" "2222"];
+      fastConnection = true;
+      # Currently broken, see https://github.com/serokell/deploy-rs/issues/78
+      magicRollback = false;
+    };
+
+    #########
+    # Tests #
+    #########
+    checks = builtins.mapAttrs (system: deployLib: deployLib.deployChecks self.deploy) deploy-rs.lib;
+
     ####################
     # Helper functions #
     ####################
@@ -76,7 +101,7 @@
     in {
       type = "app";
       program = builtins.toString (writeShellScript "run-vm" ''
-        export QEMU_OPTS="-m 3941 -smp 2 -curses"
+        export QEMU_OPTS="-m 3941 -smp 2 -display curses"
         export QEMU_NET_OPTS="${qemuNetOpts}"
         "${vm}/bin/run-tlaternet-vm"
       '');
@@ -95,18 +120,13 @@
         nativeBuildInputs = [
           sops-import-keys-hook
         ];
+
         packages = with pkgs; [
           nixfmt
           git-lfs
           sops-init-gpg-key
           deploy-rs-bin
         ];
-
-        shellHook = ''
-          # Work around sudo requiring a full terminal when deploying to
-          # a remote host
-          export NIX_SSHOPTS="-t"
-        '';
       };
   };
 }