add release info

the flake now has another package output `release-info` that will report
the versions it was built with (php, uwsgi, nixos and nextcloud).

bump github actions too

.github/workflows/ci.yml

@@ -30,7 +30,7 @@ jobs:
         sh -c 'sha256sum $0 > $0.sha256' ${{ env.ARTIFACT_PREFIX }}_*.raw
 
     - name: Upload artifacts
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         if-no-files-found: error
         retention-days: 5
@@ -39,6 +39,9 @@ jobs:
           ${{ env.ARTIFACT_PREFIX }}_*.raw.sha256
         name: ${{ env.ARTIFACT_PREFIX }}
 
+    - name: Release Info
+      run: nix build --no-update-lock-file .#release-info
+
     - name: Create a github release from tag
       if: startsWith(github.ref, 'refs/tags/v')
       uses: softprops/action-gh-release@v1
@@ -47,3 +50,4 @@ jobs:
         files: |
           ${{ env.ARTIFACT_PREFIX }}_*.raw
           ${{ env.ARTIFACT_PREFIX }}_*.raw.sha256
+      body_path: result

flake.nix

@@ -6,8 +6,16 @@
   outputs = { self, nixpkgs, ... }:
     let
       pkgs = import nixpkgs { system = "x86_64-linux"; };
+      nixos = (nixpkgs.lib.nixosSystem { system = "x86_64-linux"; modules = []; }).config.system.nixos;
       ttRss = (import ./tt-rss.nix { inherit pkgs; });
     in {
       packages.x86_64-linux.default = (import ./build.nix { inherit pkgs ttRss; withSystemd = false; });
+      packages.x86_64-linux.release-info = pkgs.writeText "release-info.txt" ''
+        php: ${pkgs.php.version}
+        uwsgi: ${pkgs.uwsgi.version}
+        tt-rss: ${ttRss.version}
+        ${nixos.distroName} ${nixos.release} (${nixos.codeName})
+        ${nixos.distroId} ${nixos.label}
+      '';
     };
 }