Add version file for crane push

.gitea/workflows/build-container.yml

@@ -1,7 +1,7 @@
-name: Build container
+name: Build image
 on: [push]
 jobs:
-  build-container:
+  build-image:
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout repo
@@ -12,12 +12,17 @@ jobs:
         uses: cachix/install-nix-action@v31
         with:
           enable_kvm: false
-      - name: Build container
+      - name: Build image
-        run: nix build .#docker
+        run: nix build .#image
       - run: ls -l
       - run: ls -l $(readlink -f result)
       - name: Install crane
         run: |
           curl -sL "https://github.com/google/go-containerregistry/releases/download/v0.20.3/go-containerregistry_Linux_x86_64.tar.gz" > go-containerregistry.tar.gz
           tar -zxvf go-containerregistry.tar.gz -C /usr/local/bin/ crane
-      - run: crane push result
+      - name: Get image name
+        run: nix build .#image-name -o image-name
+
+      - run: echo $(cat image-name)
+
+      - run: crane push result $(cat image-name)

flake.nix

@@ -39,7 +39,10 @@
     };
     packages.${system} = {
       default = vrnp-static;
-      docker = pkgs.dockerTools.buildImage {
+      image-name = pkgs.runCommand "vrnp-version" {} ''
+        echo -n git.pbrinkmeier.de/paul/vrnp:${vrnp-static.version} > $out
+      '';
+      image = pkgs.dockerTools.buildImage {
         name = "git.pbrinkmeier.de/paul/vrnp";
         tag = vrnp-static.version;
         copyToRoot = pkgs.buildEnv {