Fixed: Improve indexer-sync robustness and workflow (#662)

- Add external blocklist configuration (scripts/blocklist.txt)
- Fix conflict detection using proper git commands (diff --filter=U)
- Expand list of unwanted file types (images, code files, etc)
- Remove Jackett src/ files and unwanted assets automatically
- Better handling of both-added (AA) conflicts
- Simplify commit logic (remove retry mechanism)
- Better error handling for empty commits
- Enhanced GitHub Actions workflow with exit code handling
- Auto force-push for automated-indexer-sync branch only
- Manual force-push with -f flag for other branches

Co-authored-by: ServarrAdmin <development@lidarr.audio>

.github/workflows/indexer-sync.yml

@@ -109,6 +109,7 @@ jobs:
           echo "✅ prowlarr/indexers repository fetched successfully"
 
       - name: Run indexer sync
+        id: sync_attempt
         run: |
           # Activate virtual environment if it exists
           if [ -d ".venv" ]; then
@@ -135,8 +136,58 @@ jobs:
             FLAGS="$FLAGS -f"
           fi
 
-          echo "Running: ./scripts/indexer-sync-v2.sh $FLAGS"
+          echo "🔄 Running: ./scripts/indexer-sync-v2.sh $FLAGS"
+          echo "📝 Target branch: $TARGET_BRANCH"
+          echo "⚙️ Mode: $MODE"
+
+          # Run with error handling
+          set +e
           ./scripts/indexer-sync-v2.sh $FLAGS
+          EXIT_CODE=$?
+          set -e
+
+          # Handle specific exit codes
+          case $EXIT_CODE in
+            0)
+              echo "✅ Sync completed successfully"
+              exit 0
+              ;;
+            3)
+              echo "⚠️ Failed to parse Prowlarr commits - may need manual investigation"
+              exit $EXIT_CODE
+              ;;
+            4)
+              echo "⚠️ Too many commits to cherry-pick - exceeds safety limit"
+              exit $EXIT_CODE
+              ;;
+            5)
+              echo "⚠️ Unresolved conflicts in automation mode"
+              exit $EXIT_CODE
+              ;;
+            6)
+              echo "⚠️ Unresolved conflicts before commit"
+              exit $EXIT_CODE
+              ;;
+            7)
+              echo "⚠️ Failed to create commit - possibly no changes or git error"
+              # This could be a transient failure or mean we're already up to date
+              # Check if there are actually any differences
+              if git diff --quiet origin/master...HEAD; then
+                echo "ℹ️ No actual changes detected - already up to date"
+                exit 0
+              else
+                exit $EXIT_CODE
+              fi
+              ;;
+            8)
+              echo "⚠️ Failed to push changes"
+              exit $EXIT_CODE
+              ;;
+            *)
+              echo "⚠️ Unknown error occurred (exit code: $EXIT_CODE)"
+              exit $EXIT_CODE
+              ;;
+          esac
 
       - name: Summary
         run: |