Add version to image meta

.gitea/workflows/build-container.yml

@@ -1,5 +1,6 @@
 name: Build image
 on:
+  push:
     tags:
       - 'v*'
 jobs:
@@ -14,13 +15,16 @@ jobs:
         uses: cachix/install-nix-action@v31
         with:
           enable_kvm: false
-      - run: echo $GITHUB_REF_NAME
+      - name: Get image name
+        run: nix build .#image-meta -o image-meta
+      - name: Version check
+        run: |
+          VERSION=$(cat image-meta/version)
+          test "$GITHUB_REF_NAME" == v"$VERSION"
       - name: Build image
         run: nix build .#image -o image.tar.gz
-      - name: Get image name
-        run: nix build .#image-name -o image-name
       - run: docker login -u paul -p "$PASSWORD" git.pbrinkmeier.de
         env:
           PASSWORD: "${{ secrets.REGISTRY_PASSWORD }}"
       - run: docker load < image.tar.gz
-      - run: docker image push $(cat image-name)
+      - run: docker image push $(cat image-meta/name)

flake.nix

@@ -39,8 +39,10 @@
     };
     packages.${system} = {
       default = vrnp-static;
-      image-name = pkgs.runCommand "vrnp-version" {} ''
+      image-meta = pkgs.runCommand "vrnp-version" {} ''
-        echo -n git.pbrinkmeier.de/paul/vrnp:${vrnp-static.version} > $out
+        mkdir -p $out
+        echo -n ${vrnp-static.version} > $out/version
+        echo -n git.pbrinkmeier.de/paul/vrnp:${vrnp-static.version} > $out/name
       '';
       image = pkgs.dockerTools.buildImage {
         name = "git.pbrinkmeier.de/paul/vrnp";