fix: reset index before build new one (#2471)

Author: BoYanZh

internal/index/build.go

@@ -53,18 +53,14 @@ type Data struct {
 }
 
 func BuildIndex(ctx context.Context, indexPaths, ignorePaths []string, maxDepth int) {
-	WriteProgress(&Progress{
-		FileCount:    0,
-		IsDone:       false,
-		LastDoneTime: nil,
-	})
+	// TODO: partial remove indices
+	Reset()
 	var batchs []*bleve.Batch
 	var fileCount uint64 = 0
 	for _, indexPath := range indexPaths {
 		batch := func() *bleve.Batch {
 			batch := index.NewBatch()
 			// TODO: cache unchanged part
-			// TODO: store current progress
 			walkFn := func(indexPath string, info model.Obj, err error) error {
 				for _, avoidPath := range ignorePaths {
 					if indexPath == avoidPath {

internal/index/index.go

@@ -1,6 +1,9 @@
 package index
 
 import (
+	"os"
+
+	"github.com/alist-org/alist/v3/internal/conf"
 	"github.com/blevesearch/bleve/v2"
 	log "github.com/sirupsen/logrus"
 )
@@ -28,3 +31,17 @@ func Init(indexPath *string) {
 		})
 	}
 }
+
+func Reset() {
+	log.Infof("Removing old index...")
+	err := os.RemoveAll(conf.Conf.IndexDir)
+	if err != nil {
+		log.Fatal(err)
+	}
+	Init(&conf.Conf.IndexDir)
+	WriteProgress(&Progress{
+		FileCount:    0,
+		IsDone:       false,
+		LastDoneTime: nil,
+	})
+}