try and fix deployment

Co-authored-by: Floweynt <server-n0@mail.floweytf.com>
Reviewed-on: #12

configuration.nix

@@ -5,6 +5,7 @@
   hostInfo,
   customPkgs,
   flakeRev,
+  deployLabel,
   ...
 }:
 let
@@ -62,14 +63,7 @@ in
 
   time.timeZone = "UTC";
   system.stateVersion = "26.05";
-  system.nixos.label =
-    let
-      labelFile = ./.nixos-label;
-    in
-    if builtins.pathExists labelFile then
-      lib.removeSuffix "\n" (builtins.readFile labelFile)
-    else
-      flakeRev;
+  system.nixos.label = if deployLabel != null then deployLabel else flakeRev;
 
   nix = {
     settings = {

flake.lock

@@ -1,5 +1,17 @@
 {
   "nodes": {
+    "deploy-label": {
+      "flake": false,
+      "locked": {
+        "path": "./misc/deploy-label",
+        "type": "path"
+      },
+      "original": {
+        "path": "./misc/deploy-label",
+        "type": "path"
+      },
+      "parent": []
+    },
     "flake-utils": {
       "inputs": {
         "systems": "systems"
@@ -79,6 +91,7 @@
     },
     "root": {
       "inputs": {
+        "deploy-label": "deploy-label",
         "microvm": "microvm",
         "mtce": "mtce",
         "nixpkgs": "nixpkgs"

flake.nix

@@ -7,6 +7,8 @@
     mtce.inputs.nixpkgs.follows = "nixpkgs";
     microvm.url = "github:microvm-nix/microvm.nix";
     microvm.inputs.nixpkgs.follows = "nixpkgs";
+    deploy-label.url = "path:./misc/deploy-label";
+    deploy-label.flake = false;
   };
 
   outputs =
@@ -15,6 +17,7 @@
       nixpkgs,
       mtce,
       microvm,
+      deploy-label,
       ...
     }:
     let
@@ -23,6 +26,12 @@
       pkgs = import nixpkgs { inherit system; };
 
       flakeRev = self.shortRev or self.dirtyShortRev or "unknown";
+      deployLabel =
+        let
+          labelFile = "${deploy-label}/label";
+          raw = lib.removeSuffix "\n" (builtins.readFile labelFile);
+        in
+        if raw != "" then raw else null;
 
       customPkgs = {
         hopper-rs = pkgs.callPackage ./packages/hopper-rs.nix { };
@@ -56,7 +65,7 @@
 
       specialArgsFor = hostName: {
         hostInfo = hostInfoFor hostName;
-        inherit inputs customPkgs flakeRev;
+        inherit inputs customPkgs flakeRev deployLabel;
       };
 
       hostDefFor =

modules/autodeploy.nix

@@ -38,7 +38,7 @@ in
       type = lib.types.listOf lib.types.str;
       default = [ ];
     };
-    
+
     repoOwner = lib.mkOption {
       type = lib.types.str;
       description = "User that owns the configuration checkout";

scripts/server-autodeploy.sh

@@ -48,15 +48,17 @@ runas git tag -v "$latest" || {
 sha=$(runas git rev-list -1 "$latest")
 report_status "pending" "deploying $latest" "$sha"
 
-runas git checkout "$latest"
-runas tee .nixos-label <<< "$latest" >/dev/null
-runas git add .nixos-label
+label_dir=$(mktemp -d)
+echo "$latest" > "$label_dir/label"
+flake_url="git+${GITEA_URL}/${GITEA_REPO}?ref=refs/tags/${latest}&rev=${sha}#$HOSTNAME"
 
-if nixos-rebuild switch --flake ".#$HOSTNAME"; then
+if nixos-rebuild switch --flake "$flake_url" --override-input deploy-label "path:$label_dir"; then
+  rm -rf "$label_dir"
   echo "$latest" > "$STATE_DIR/tag"
   report_status "success" "deployed $latest" "$sha"
   echo "deployed $latest"
 else
+  rm -rf "$label_dir"
   report_status "failure" "nixos-rebuild failed" "$sha"
   exit 1
 fi