added tool for checking deployment requirement

.forgejo/workflows/needs-deploy.sh

@@ -0,0 +1,44 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Check for hostname argument
+if [[ $# -ne 1 ]]; then
+  echo "Usage: $0 <nixos-hostname>"
+  exit 1
+fi
+
+HOST="$1"
+REPO_PATH="git+file://$PWD"
+
+CURRENT_COMMIT=$(git rev-parse HEAD)
+PREV_COMMIT=$(git rev-parse HEAD^)
+
+# Check if the host exists at the current commit
+if ! nix eval --quiet --expr "
+  let
+    flake = builtins.getFlake \"${REPO_PATH}?rev=${CURRENT_COMMIT}\";
+  in
+    builtins.hasAttr \"${HOST}\" flake.nixosConfigurations
+"; then
+  echo "Error: Host '${HOST}' not found in nixosConfigurations at HEAD."
+  exit 1
+fi
+
+# Now check for derivation change
+RESULT=$(nix eval --raw --expr "
+  let
+    flake = builtins.getFlake;
+    prev = flake \"${REPO_PATH}?rev=${PREV_COMMIT}\";
+    curr = flake \"${REPO_PATH}?rev=${CURRENT_COMMIT}\";
+  in
+    if prev.nixosConfigurations.\"${HOST}\".config.system.build.toplevel !=
+       curr.nixosConfigurations.\"${HOST}\".config.system.build.toplevel
+    then \"changed\" else \"unchanged\"
+")
+
+# Output result
+if [[ $RESULT == "changed" ]]; then
+  echo "System derivation changed for host '${HOST}' — deploy!"
+else
+  echo "No change for host '${HOST}' — skip deployment."
+fi

configurations/nixos/base/default.nix

@@ -18,9 +18,6 @@ in
   deploy = {
     enable = false;
   };
-  services = {
-    tty-ips.enable = true;
-  };
   networking = {
     hostName = "base";
   };

configurations/nixos/caddy/default.nix

@@ -0,0 +1,26 @@
+{
+  flake,
+  modulesPath,
+  config,
+  ...
+}:
+
+let
+  inherit (flake) inputs;
+  inherit (inputs) self;
+in
+{
+  imports = [
+    self.nixosModules.default
+    "${modulesPath}/virtualisation/lxc-container.nix"
+  ];
+  deploy = {
+    address = "unknown.local";
+  };
+  networking = {
+    hostName = "caddy";
+  };
+  environment.systemPackages = [
+  ];
+  system.stateVersion = "25.05";
+}

configurations/nixos/forgejo-runner-tofu/default.nix

@@ -61,9 +61,6 @@ in
   deploy = {
     address = "201:ea26:66c7:657b:3599:63a6:c66c:d388";
   };
-  services = {
-    tty-ips.enable = true;
-  };
   networking = {
     firewall.enable = lib.mkForce false;
     hostName = "forgejo-runner-tofu";

configurations/nixos/observer-tofu/default.nix

@@ -19,7 +19,6 @@ in
     address = "200:b938:d405:92df:a6e:1ffd:5213:26b";
   };
   services = {
-    tty-ips.enable = true;
     uptime-kuma = {
       enable = true;
       settings = {

configurations/nixos/tofu/default.nix

@@ -26,7 +26,6 @@ in
   };
 
   services = {
-    tty-ips.enable = true;
     otf = {
       enable = true;
       environment = {

modules/nixos/common/discovery.nix

@@ -12,7 +12,7 @@ in
   options.services.tty-ips = {
     enable = mkOption {
       type = types.bool;
-      default = false;
+      default = true;
       description = "Show interface IPs in TTY login using a dynamic issue file.";
     };
   };