feat: customize index max depth

Because some driver's issue may cause infinite loop

internal/bootstrap/data/setting.go

@@ -146,6 +146,7 @@ func InitialSettings() []model.SettingItem {
 		{Key: conf.SearchIndex, Value: "none", Type: conf.TypeSelect, Options: "database,database_non_full_text,bleve,none", Group: model.INDEX},
 		{Key: conf.AutoUpdateIndex, Value: "false", Type: conf.TypeBool, Group: model.INDEX},
 		{Key: conf.IgnorePaths, Value: "", Type: conf.TypeText, Group: model.INDEX, Flag: model.PRIVATE, Help: `one path per line`},
+		{Key: conf.MaxIndexDepth, Value: "20", Type: conf.TypeNumber, Group: model.INDEX, Flag: model.PRIVATE, Help: `max depth of index`},
 		{Key: conf.IndexProgress, Value: "{}", Type: conf.TypeText, Group: model.SINGLE, Flag: model.PRIVATE},
 
 		// GitHub settings

internal/conf/const.go

@@ -44,8 +44,8 @@ const (
 	// index
 	SearchIndex     = "search_index"
 	AutoUpdateIndex = "auto_update_index"
-	IndexPaths      = "index_paths"
 	IgnorePaths     = "ignore_paths"
+	MaxIndexDepth   = "max_index_depth"
 
 	// aria2
 	Aria2Uri    = "aria2_uri"

internal/db/searchnode.go

@@ -2,7 +2,7 @@ package db
 
 import (
 	"fmt"
-	"path"
+	stdpath "path"
 	"strings"
 
 	"github.com/alist-org/alist/v3/internal/conf"
@@ -29,13 +29,13 @@ func BatchCreateSearchNodes(nodes *[]model.SearchNode) error {
 	return db.CreateInBatches(nodes, 1000).Error
 }
 
-func DeleteSearchNodesByParent(prefix string) error {
-	prefix = utils.FixAndCleanPath(prefix)
-	err := db.Where(whereInParent(prefix)).Delete(&model.SearchNode{}).Error
+func DeleteSearchNodesByParent(path string) error {
+	path = utils.FixAndCleanPath(path)
+	err := db.Where(whereInParent(path)).Delete(&model.SearchNode{}).Error
 	if err != nil {
 		return err
 	}
-	dir, name := path.Split(prefix)
+	dir, name := stdpath.Split(path)
 	return db.Where(fmt.Sprintf("%s = ? AND %s = ?",
 		columnName("parent"), columnName("name")),
 		dir, name).Delete(&model.SearchNode{}).Error

internal/search/build.go

@@ -217,10 +217,11 @@ func Update(parent string, objs []model.Obj) {
 			}
 			// build index if it's a folder
 			if objs[i].IsDir() {
+				dir := path.Join(parent, objs[i].GetName())
 				err = BuildIndex(ctx,
-					[]string{path.Join(parent, objs[i].GetName())},
+					[]string{dir},
 					conf.SlicesMap[conf.IgnorePaths],
-					-1, false)
+					setting.GetInt(conf.MaxIndexDepth, 20)-strings.Count(dir, "/"), false)
 				if err != nil {
 					log.Errorf("update search index error while build index: %+v", err)
 					return

internal/search/db/search.go

@@ -30,8 +30,8 @@ func (D DB) Get(ctx context.Context, parent string) ([]model.SearchNode, error)
 	return db.GetSearchNodesByParent(parent)
 }
 
-func (D DB) Del(ctx context.Context, prefix string) error {
-	return db.DeleteSearchNodesByParent(prefix)
+func (D DB) Del(ctx context.Context, path string) error {
+	return db.DeleteSearchNodesByParent(path)
 }
 
 func (D DB) Release(ctx context.Context) error {

internal/search/db_non_full_text/search.go

@@ -30,8 +30,8 @@ func (D DB) Get(ctx context.Context, parent string) ([]model.SearchNode, error)
 	return db.GetSearchNodesByParent(parent)
 }
 
-func (D DB) Del(ctx context.Context, prefix string) error {
-	return db.DeleteSearchNodesByParent(prefix)
+func (D DB) Del(ctx context.Context, path string) error {
+	return db.DeleteSearchNodesByParent(path)
 }
 
 func (D DB) Release(ctx context.Context) error {

server/handles/index.go

@@ -6,23 +6,19 @@ import (
 	"github.com/alist-org/alist/v3/internal/conf"
 	"github.com/alist-org/alist/v3/internal/model"
 	"github.com/alist-org/alist/v3/internal/search"
+	"github.com/alist-org/alist/v3/internal/setting"
 	"github.com/alist-org/alist/v3/server/common"
 	"github.com/gin-gonic/gin"
 	log "github.com/sirupsen/logrus"
 )
 
-type BuildOrUpdateIndexReq struct {
+type UpdateIndexReq struct {
 	Paths    []string `json:"paths"`
 	MaxDepth int      `json:"max_depth"`
 	//IgnorePaths []string `json:"ignore_paths"`
 }
 
 func BuildIndex(c *gin.Context) {
-	var req BuildOrUpdateIndexReq
-	if err := c.ShouldBind(&req); err != nil {
-		common.ErrorResp(c, err, 400)
-		return
-	}
 	if search.Running.Load() {
 		common.ErrorStrResp(c, "index is running", 400)
 		return
@@ -34,8 +30,8 @@ func BuildIndex(c *gin.Context) {
 			log.Errorf("clear index error: %+v", err)
 			return
 		}
-		err = search.BuildIndex(context.Background(), req.Paths,
-			conf.SlicesMap[conf.IgnorePaths], req.MaxDepth, true)
+		err = search.BuildIndex(context.Background(), []string{"/"},
+			conf.SlicesMap[conf.IgnorePaths], setting.GetInt(conf.MaxIndexDepth, 20), true)
 		if err != nil {
 			log.Errorf("build index error: %+v", err)
 		}
@@ -44,7 +40,7 @@ func BuildIndex(c *gin.Context) {
 }
 
 func UpdateIndex(c *gin.Context) {
-	var req BuildOrUpdateIndexReq
+	var req UpdateIndexReq
 	if err := c.ShouldBind(&req); err != nil {
 		common.ErrorResp(c, err, 400)
 		return