94 lines
2.6 KiB
Go
94 lines
2.6 KiB
Go
// Copyright 2016 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package indexer
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import (
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"fmt"
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"os"
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"strconv"
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"code.gitea.io/gitea/modules/setting"
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"github.com/blevesearch/bleve"
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"github.com/blevesearch/bleve/analysis/token/unicodenorm"
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"github.com/blevesearch/bleve/index/upsidedown"
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"github.com/blevesearch/bleve/mapping"
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"github.com/blevesearch/bleve/search/query"
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"github.com/ethantkoenig/rupture"
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)
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// indexerID a bleve-compatible unique identifier for an integer id
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func indexerID(id int64) string {
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return strconv.FormatInt(id, 36)
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}
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// idOfIndexerID the integer id associated with an indexer id
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func idOfIndexerID(indexerID string) (int64, error) {
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id, err := strconv.ParseInt(indexerID, 36, 64)
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if err != nil {
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return 0, fmt.Errorf("Unexpected indexer ID %s: %v", indexerID, err)
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}
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return id, nil
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}
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// numericEqualityQuery a numeric equality query for the given value and field
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func numericEqualityQuery(value int64, field string) *query.NumericRangeQuery {
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f := float64(value)
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tru := true
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q := bleve.NewNumericRangeInclusiveQuery(&f, &f, &tru, &tru)
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q.SetField(field)
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return q
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}
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func newMatchPhraseQuery(matchPhrase, field, analyzer string) *query.MatchPhraseQuery {
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q := bleve.NewMatchPhraseQuery(matchPhrase)
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q.FieldVal = field
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q.Analyzer = analyzer
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return q
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}
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const unicodeNormalizeName = "unicodeNormalize"
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func addUnicodeNormalizeTokenFilter(m *mapping.IndexMappingImpl) error {
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return m.AddCustomTokenFilter(unicodeNormalizeName, map[string]interface{}{
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"type": unicodenorm.Name,
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"form": unicodenorm.NFC,
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})
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}
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const maxBatchSize = 16
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// openIndexer open the index at the specified path, checking for metadata
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// updates and bleve version updates. If index needs to be created (or
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// re-created), returns (nil, nil)
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func openIndexer(path string, latestVersion int) (bleve.Index, error) {
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_, err := os.Stat(setting.Indexer.IssuePath)
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if err != nil && os.IsNotExist(err) {
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return nil, nil
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} else if err != nil {
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return nil, err
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}
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metadata, err := rupture.ReadIndexMetadata(path)
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if err != nil {
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return nil, err
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}
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if metadata.Version < latestVersion {
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// the indexer is using a previous version, so we should delete it and
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// re-populate
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return nil, os.RemoveAll(path)
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}
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index, err := bleve.Open(path)
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if err != nil && err == upsidedown.IncompatibleVersion {
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// the indexer was built with a previous version of bleve, so we should
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// delete it and re-populate
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return nil, os.RemoveAll(path)
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} else if err != nil {
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return nil, err
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}
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return index, nil
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}
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