Implement retry mechanism for attic push commands in build workflows to enhance reliability and prevent pipeline failures. Update cache push logic in build-on-push, build-schemes, and weekly-build-cache workflows.

.gitea/workflows/build-on-push.yml

@@ -34,17 +34,57 @@ jobs:
           nix build .#emacs-vm --quiet
 
       - name: Push to cache
+        continue-on-error: true
         run: |
           echo "Pushing builds to cache..."
+          
+          # Retry function for attic push commands
+          retry_attic_push() {
+            local max_attempts=5
+            local attempt=1
+            local command="$@"
+            
+            while [ $attempt -le $max_attempts ]; do
+              echo "Attempt $attempt/$max_attempts: $command"
+              if eval "$command"; then
+                echo "✓ Successfully pushed to cache on attempt $attempt"
+                return 0
+              else
+                local exit_code=$?
+                echo "✗ Attempt $attempt failed with exit code $exit_code"
+                if [ $attempt -lt $max_attempts ]; then
+                  echo "Waiting 2 seconds before retry..."
+                  sleep 2
+                fi
+                attempt=$((attempt + 1))
+              fi
+            done
+            
+            echo "⚠️ Failed to push to cache after $max_attempts attempts. Continuing anyway..."
+            return 0  # Don't fail the pipeline
+          }
+          
           # Push all built derivations to cache
           if ls result* 1> /dev/null 2>&1; then
-            attic push servidos:nixos result*
+            retry_attic_push "attic push servidos:nixos result*"
           fi
 
           # Push the specific system derivations we just built
-          nix build .#nixosConfigurations.workstation.config.system.build.toplevel --print-out-paths | attic push servidos:nixos --stdin
-          nix build .#nixosConfigurations.server.config.system.build.toplevel --print-out-paths | attic push servidos:nixos --stdin
-          nix build .#emacs-vm --print-out-paths | attic push servidos:nixos --stdin
+          # Get paths and push with retry (paths are already built, so this is fast)
+          workstation_path=$(nix build .#nixosConfigurations.workstation.config.system.build.toplevel --print-out-paths 2>/dev/null || echo "")
+          if [ -n "$workstation_path" ]; then
+            retry_attic_push "echo \"$workstation_path\" | attic push servidos:nixos --stdin"
+          fi
+          
+          server_path=$(nix build .#nixosConfigurations.server.config.system.build.toplevel --print-out-paths 2>/dev/null || echo "")
+          if [ -n "$server_path" ]; then
+            retry_attic_push "echo \"$server_path\" | attic push servidos:nixos --stdin"
+          fi
+          
+          emacs_path=$(nix build .#emacs-vm --print-out-paths 2>/dev/null || echo "")
+          if [ -n "$emacs_path" ]; then
+            retry_attic_push "echo \"$emacs_path\" | attic push servidos:nixos --stdin"
+          fi
 
       - name: Summary
         run: |