feat(importer): add --replace flag to overwrite existing index

2 files changed, 20 insertions, 3 deletions

diff --git a/import/main.go b/import/main.go
index 87f8e4d..52b4515 100644
--- a/import/main.go
+++ b/import/main.go
@@ -22,6 +22,7 @@ const timeout = 30 * time.Minute
 type Config struct {
 	ConfigFile string     `conf:"short:c"`
 	LogLevel   slog.Level `conf:"default:INFO"`
+	Replace    bool       `conf:"default:false,help:whether to remove existing database, if exists"`
 }
 
 func main() {
@@ -50,7 +51,7 @@ func main() {
 		return
 	}
 
-	indexer, err := search.NewIndexer(cfg.DataPath)
+	indexer, err := search.NewIndexer(cfg.DataPath, runtimeConfig.Replace)
 	if err != nil {
 		log.Fatalf("Failed to create indexer: %v", err)
 	}
@@ -93,7 +94,7 @@ func main() {
 		}
 		logger.Info("importer fetch succeeded", "updated", updated)
 
-		if updated {
+		if updated || runtimeConfig.Replace {
 			hadWarnings, err := imp.Import(ctx, indexer)
 
 			if err != nil {
diff --git a/internal/search/indexer.go b/internal/search/indexer.go
index b0e57d4..fc0214b 100644
--- a/internal/search/indexer.go
+++ b/internal/search/indexer.go
@@ -6,7 +6,9 @@ import (
 	"encoding/gob"
 	"log"
 	"log/slog"
+	"os"
 	"path"
+	"searchix/internal/file"
 	"searchix/internal/options"
 
 	"github.com/blevesearch/bleve/v2"
@@ -27,12 +29,26 @@ type WriteIndex struct {
 	indexMapping *mapping.IndexMappingImpl
 }
 
-func NewIndexer(dir string) (*WriteIndex, error) {
+func NewIndexer(dir string, force bool) (*WriteIndex, error) {
 	var err error
 	bleve.SetLog(log.Default())
 
 	indexPath := path.Join(dir, indexFilename)
 
+	exists, err := file.Exists(indexPath)
+	if err != nil {
+		return nil, errors.WithMessagef(err, "could not check if index exists at path %s", indexPath)
+	}
+	if exists {
+		if !force {
+			return nil, errors.Errorf("index file %s already exists (use --force to replace)", indexPath)
+		}
+		err := os.RemoveAll(indexPath)
+		if err != nil {
+			return nil, errors.WithMessagef(err, "could not remove index file %s", indexPath)
+		}
+	}
+
 	indexMapping := bleve.NewIndexMapping()
 	indexMapping.StoreDynamic = false
 	indexMapping.IndexDynamic = false