mirror of
https://github.com/go-gitea/gitea
synced 2024-11-09 11:44:27 +00:00
97a7c04a8f
Backport #30799 by wxiaoguang Fix #30797 Fix #30317 Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
62 lines
1.7 KiB
Go
62 lines
1.7 KiB
Go
// Copyright 2023 The Gitea Authors. All rights reserved.
|
|
// SPDX-License-Identifier: MIT
|
|
|
|
package bleve
|
|
|
|
import (
|
|
"errors"
|
|
"os"
|
|
|
|
"code.gitea.io/gitea/modules/log"
|
|
"code.gitea.io/gitea/modules/util"
|
|
|
|
"github.com/blevesearch/bleve/v2"
|
|
"github.com/blevesearch/bleve/v2/index/upsidedown"
|
|
"github.com/ethantkoenig/rupture"
|
|
)
|
|
|
|
// openIndexer open the index at the specified path, checking for metadata
|
|
// updates and bleve version updates. If index needs to be created (or
|
|
// re-created), returns (nil, nil)
|
|
func openIndexer(path string, latestVersion int) (bleve.Index, int, error) {
|
|
_, err := os.Stat(path)
|
|
if err != nil && os.IsNotExist(err) {
|
|
return nil, 0, nil
|
|
} else if err != nil {
|
|
return nil, 0, err
|
|
}
|
|
|
|
metadata, err := rupture.ReadIndexMetadata(path)
|
|
if err != nil {
|
|
return nil, 0, err
|
|
}
|
|
if metadata.Version < latestVersion {
|
|
// the indexer is using a previous version, so we should delete it and
|
|
// re-populate
|
|
return nil, metadata.Version, util.RemoveAll(path)
|
|
}
|
|
|
|
index, err := bleve.Open(path)
|
|
if err != nil {
|
|
if errors.Is(err, upsidedown.IncompatibleVersion) {
|
|
log.Warn("Indexer was built with a previous version of bleve, deleting and rebuilding")
|
|
return nil, 0, util.RemoveAll(path)
|
|
}
|
|
return nil, 0, err
|
|
}
|
|
|
|
return index, 0, nil
|
|
}
|
|
|
|
func GuessFuzzinessByKeyword(s string) int {
|
|
// according to https://github.com/blevesearch/bleve/issues/1563, the supported max fuzziness is 2
|
|
// magic number 4 was chosen to determine the levenshtein distance per each character of a keyword
|
|
// BUT, when using CJK (eg: `갃갃갃` `啊啊啊`), it mismatches a lot.
|
|
for _, r := range s {
|
|
if r >= 128 {
|
|
return 0
|
|
}
|
|
}
|
|
return min(2, len(s)/4)
|
|
}
|