Add hydra callback

.gitea/workflows/hydra-callback.yml

@@ -0,0 +1,31 @@
+name: Weekly Flake Update
+
+on:
+    pull_request:
+      types: 
+        - opened
+
+permissions:
+    contents: write
+
+jobs:
+    hydra_callback:
+        runs-on: ubuntu-latest
+        env:
+            NIXPKGS_ALLOW_UNFREE: 1
+        steps:
+            - name: Install sudo
+              run: |
+                  apt-get update
+                  apt-get install -y sudo
+            - name: Set up Nix
+              uses: https://github.com/cachix/install-nix-action@v31
+              with: 
+                github_access_token: ${{ secrets.AHTLONS_GITHUB_TOKEN }}
+            - name: Find pr number
+              run: |
+                echo PR=$(echo "${{ github.ref }}" | cut -d / -f 3) >> "$GITHUB_ENV"
+            - name: run hydra wait
+              run: |
+                echo "Running now @ pr no $PR"
+                nix run nixpkgs#hydra-cli -- -H https://hydra.dynamicdiscord.de jobset-wait malobeo2 "$PR"