Fixed opening an existing index

internal/task_handlers/indexers/basic_indexer.go

@@ -1,6 +1,7 @@
 package indexers
 
 import (
+	"os"
 	"strings"
 
 	"github.com/blevesearch/bleve/v2"
@@ -15,12 +16,21 @@ type BasicIndexer struct {
 }
 
 func (b *BasicIndexer) Initialize(config config.TaskHandlerOptions, baseFolder string, outputLimit int64) error {
-	// Configure default indexing mapping
-	indexMapping := bleve.NewIndexMapping()
-	index, err := bleve.New(baseFolder, indexMapping)
 
+	// Try to open an existing index
+	index, err := bleve.Open(baseFolder)
+
+	// If the index doesn't exist, create a new one
 	if err != nil {
-		return err
+		if os.IsNotExist(err) {
+			indexMapping := bleve.NewIndexMapping()
+			index, err = bleve.New(baseFolder, indexMapping)
+			if err != nil {
+				return err
+			}
+		} else {
+			return err
+		}
 	}
 
 	b.index = index