example refactor snowflake module system

nix/snow/flake/outputs/deploy.nix

@@ -0,0 +1,57 @@
+    deploy.nodes = mapNodes nodes ({
+      name,
+      node,
+      ...
+    }: let
+      inherit
+        (node.deploy)
+        ssh
+        user
+        interactiveSudo
+        remoteBuild
+        rollback
+        autoRollback
+        magicRollback
+        activationTimeout
+        confirmTimeout
+        ;
+
+      nixosFor = system: inputs.deploy-rs.lib.${system}.activate.nixos;
+    in {
+      hostname =
+        if ssh.host != null
+        then ssh.host
+        else "";
+
+      profilesOrder = ["default"]; # profiles priority
+      profiles.default = {
+        path = nixosFor node.system nixosConfigurations.${name};
+
+        user = user;
+        sudo = "sudo -u";
+        interactiveSudo = interactiveSudo;
+
+        fastConnection = false;
+
+        autoRollback = autoRollback -> rollback;
+        magicRollback = magicRollback -> rollback;
+        activationTimeout = activationTimeout;
+        confirmTimeout = confirmTimeout;
+
+        remoteBuild = remoteBuild;
+        sshUser = ssh.user;
+        sshOpts =
+          ssh.opts
+          ++ (
+            if elem "-p" ssh.opts
+            then []
+            else ["-p" (toString ssh.port)]
+          )
+          ++ (
+            if elem "-A" ssh.opts
+            then []
+            else ["-A"]
+          );
+      };
+    });
+