451 lines
13 KiB
Go
451 lines
13 KiB
Go
// Copyright 2019 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 code
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import (
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"bufio"
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"context"
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"fmt"
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"io"
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"os"
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"strconv"
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"strings"
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"time"
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repo_model "code.gitea.io/gitea/models/repo"
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"code.gitea.io/gitea/modules/analyze"
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"code.gitea.io/gitea/modules/charset"
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"code.gitea.io/gitea/modules/git"
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gitea_bleve "code.gitea.io/gitea/modules/indexer/bleve"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/timeutil"
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"code.gitea.io/gitea/modules/typesniffer"
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"code.gitea.io/gitea/modules/util"
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"github.com/blevesearch/bleve/v2"
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analyzer_custom "github.com/blevesearch/bleve/v2/analysis/analyzer/custom"
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analyzer_keyword "github.com/blevesearch/bleve/v2/analysis/analyzer/keyword"
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"github.com/blevesearch/bleve/v2/analysis/token/lowercase"
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"github.com/blevesearch/bleve/v2/analysis/token/unicodenorm"
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"github.com/blevesearch/bleve/v2/analysis/tokenizer/unicode"
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"github.com/blevesearch/bleve/v2/index/upsidedown"
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"github.com/blevesearch/bleve/v2/mapping"
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"github.com/blevesearch/bleve/v2/search/query"
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"github.com/ethantkoenig/rupture"
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"github.com/go-enry/go-enry/v2"
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)
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const (
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unicodeNormalizeName = "unicodeNormalize"
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maxBatchSize = 16
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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 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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// openBleveIndexer 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 openBleveIndexer(path string, latestVersion int) (bleve.Index, error) {
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_, err := os.Stat(path)
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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, util.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, util.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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// RepoIndexerData data stored in the repo indexer
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type RepoIndexerData struct {
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RepoID int64
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CommitID string
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Content string
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Language string
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UpdatedAt time.Time
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}
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// Type returns the document type, for bleve's mapping.Classifier interface.
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func (d *RepoIndexerData) Type() string {
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return repoIndexerDocType
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}
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const (
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repoIndexerAnalyzer = "repoIndexerAnalyzer"
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repoIndexerDocType = "repoIndexerDocType"
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repoIndexerLatestVersion = 5
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)
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// createBleveIndexer create a bleve repo indexer if one does not already exist
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func createBleveIndexer(path string, latestVersion int) (bleve.Index, error) {
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docMapping := bleve.NewDocumentMapping()
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numericFieldMapping := bleve.NewNumericFieldMapping()
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numericFieldMapping.IncludeInAll = false
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docMapping.AddFieldMappingsAt("RepoID", numericFieldMapping)
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textFieldMapping := bleve.NewTextFieldMapping()
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textFieldMapping.IncludeInAll = false
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docMapping.AddFieldMappingsAt("Content", textFieldMapping)
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termFieldMapping := bleve.NewTextFieldMapping()
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termFieldMapping.IncludeInAll = false
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termFieldMapping.Analyzer = analyzer_keyword.Name
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docMapping.AddFieldMappingsAt("Language", termFieldMapping)
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docMapping.AddFieldMappingsAt("CommitID", termFieldMapping)
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timeFieldMapping := bleve.NewDateTimeFieldMapping()
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timeFieldMapping.IncludeInAll = false
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docMapping.AddFieldMappingsAt("UpdatedAt", timeFieldMapping)
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mapping := bleve.NewIndexMapping()
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if err := addUnicodeNormalizeTokenFilter(mapping); err != nil {
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return nil, err
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} else if err := mapping.AddCustomAnalyzer(repoIndexerAnalyzer, map[string]interface{}{
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"type": analyzer_custom.Name,
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"char_filters": []string{},
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"tokenizer": unicode.Name,
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"token_filters": []string{unicodeNormalizeName, lowercase.Name},
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}); err != nil {
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return nil, err
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}
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mapping.DefaultAnalyzer = repoIndexerAnalyzer
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mapping.AddDocumentMapping(repoIndexerDocType, docMapping)
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mapping.AddDocumentMapping("_all", bleve.NewDocumentDisabledMapping())
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indexer, err := bleve.New(path, mapping)
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if err != nil {
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return nil, err
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}
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if err = rupture.WriteIndexMetadata(path, &rupture.IndexMetadata{
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Version: latestVersion,
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}); err != nil {
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return nil, err
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}
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return indexer, nil
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}
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var _ Indexer = &BleveIndexer{}
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// BleveIndexer represents a bleve indexer implementation
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type BleveIndexer struct {
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indexDir string
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indexer bleve.Index
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}
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// NewBleveIndexer creates a new bleve local indexer
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func NewBleveIndexer(indexDir string) (*BleveIndexer, bool, error) {
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indexer := &BleveIndexer{
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indexDir: indexDir,
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}
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created, err := indexer.init()
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if err != nil {
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indexer.Close()
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return nil, false, err
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}
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return indexer, created, err
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}
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func (b *BleveIndexer) addUpdate(ctx context.Context, batchWriter git.WriteCloserError, batchReader *bufio.Reader, commitSha string,
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update fileUpdate, repo *repo_model.Repository, batch *gitea_bleve.FlushingBatch,
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) error {
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// Ignore vendored files in code search
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if setting.Indexer.ExcludeVendored && analyze.IsVendor(update.Filename) {
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return nil
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}
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size := update.Size
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var err error
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if !update.Sized {
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var stdout string
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stdout, _, err = git.NewCommand(ctx, "cat-file", "-s", update.BlobSha).RunStdString(&git.RunOpts{Dir: repo.RepoPath()})
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if err != nil {
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return err
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}
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if size, err = strconv.ParseInt(strings.TrimSpace(stdout), 10, 64); err != nil {
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return fmt.Errorf("Misformatted git cat-file output: %v", err)
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}
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}
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if size > setting.Indexer.MaxIndexerFileSize {
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return b.addDelete(update.Filename, repo, batch)
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}
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if _, err := batchWriter.Write([]byte(update.BlobSha + "\n")); err != nil {
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return err
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}
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_, _, size, err = git.ReadBatchLine(batchReader)
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if err != nil {
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return err
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}
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fileContents, err := io.ReadAll(io.LimitReader(batchReader, size))
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if err != nil {
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return err
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} else if !typesniffer.DetectContentType(fileContents).IsText() {
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// FIXME: UTF-16 files will probably fail here
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return nil
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}
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if _, err = batchReader.Discard(1); err != nil {
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return err
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}
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id := filenameIndexerID(repo.ID, update.Filename)
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return batch.Index(id, &RepoIndexerData{
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RepoID: repo.ID,
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CommitID: commitSha,
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Content: string(charset.ToUTF8DropErrors(fileContents)),
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Language: analyze.GetCodeLanguage(update.Filename, fileContents),
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UpdatedAt: time.Now().UTC(),
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})
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}
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func (b *BleveIndexer) addDelete(filename string, repo *repo_model.Repository, batch *gitea_bleve.FlushingBatch) error {
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id := filenameIndexerID(repo.ID, filename)
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return batch.Delete(id)
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}
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// init init the indexer
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func (b *BleveIndexer) init() (bool, error) {
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var err error
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b.indexer, err = openBleveIndexer(b.indexDir, repoIndexerLatestVersion)
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if err != nil {
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return false, err
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}
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if b.indexer != nil {
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return false, nil
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}
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b.indexer, err = createBleveIndexer(b.indexDir, repoIndexerLatestVersion)
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if err != nil {
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return false, err
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}
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return true, nil
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}
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// Close close the indexer
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func (b *BleveIndexer) Close() {
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log.Debug("Closing repo indexer")
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if b.indexer != nil {
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err := b.indexer.Close()
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if err != nil {
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log.Error("Error whilst closing the repository indexer: %v", err)
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}
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}
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log.Info("PID: %d Repository Indexer closed", os.Getpid())
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}
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// SetAvailabilityChangeCallback does nothing
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func (b *BleveIndexer) SetAvailabilityChangeCallback(callback func(bool)) {
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}
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// Ping does nothing
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func (b *BleveIndexer) Ping() bool {
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return true
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}
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// Index indexes the data
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func (b *BleveIndexer) Index(ctx context.Context, repo *repo_model.Repository, sha string, changes *repoChanges) error {
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batch := gitea_bleve.NewFlushingBatch(b.indexer, maxBatchSize)
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if len(changes.Updates) > 0 {
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// Now because of some insanity with git cat-file not immediately failing if not run in a valid git directory we need to run git rev-parse first!
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if err := git.EnsureValidGitRepository(ctx, repo.RepoPath()); err != nil {
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log.Error("Unable to open git repo: %s for %-v: %v", repo.RepoPath(), repo, err)
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return err
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}
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batchWriter, batchReader, cancel := git.CatFileBatch(ctx, repo.RepoPath())
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defer cancel()
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for _, update := range changes.Updates {
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if err := b.addUpdate(ctx, batchWriter, batchReader, sha, update, repo, batch); err != nil {
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return err
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}
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}
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cancel()
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}
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for _, filename := range changes.RemovedFilenames {
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if err := b.addDelete(filename, repo, batch); err != nil {
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return err
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}
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}
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return batch.Flush()
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}
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// Delete deletes indexes by ids
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func (b *BleveIndexer) Delete(repoID int64) error {
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query := numericEqualityQuery(repoID, "RepoID")
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searchRequest := bleve.NewSearchRequestOptions(query, 2147483647, 0, false)
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result, err := b.indexer.Search(searchRequest)
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if err != nil {
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return err
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}
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batch := gitea_bleve.NewFlushingBatch(b.indexer, maxBatchSize)
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for _, hit := range result.Hits {
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if err = batch.Delete(hit.ID); err != nil {
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return err
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}
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}
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return batch.Flush()
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}
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// Search searches for files in the specified repo.
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// Returns the matching file-paths
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func (b *BleveIndexer) Search(ctx context.Context, repoIDs []int64, language, keyword string, page, pageSize int, isMatch bool) (int64, []*SearchResult, []*SearchResultLanguages, error) {
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var (
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indexerQuery query.Query
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keywordQuery query.Query
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)
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if isMatch {
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prefixQuery := bleve.NewPrefixQuery(keyword)
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prefixQuery.FieldVal = "Content"
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keywordQuery = prefixQuery
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} else {
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phraseQuery := bleve.NewMatchPhraseQuery(keyword)
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phraseQuery.FieldVal = "Content"
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phraseQuery.Analyzer = repoIndexerAnalyzer
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keywordQuery = phraseQuery
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}
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if len(repoIDs) > 0 {
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repoQueries := make([]query.Query, 0, len(repoIDs))
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for _, repoID := range repoIDs {
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repoQueries = append(repoQueries, numericEqualityQuery(repoID, "RepoID"))
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}
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indexerQuery = bleve.NewConjunctionQuery(
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bleve.NewDisjunctionQuery(repoQueries...),
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keywordQuery,
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)
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} else {
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indexerQuery = keywordQuery
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}
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// Save for reuse without language filter
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facetQuery := indexerQuery
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if len(language) > 0 {
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languageQuery := bleve.NewMatchQuery(language)
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languageQuery.FieldVal = "Language"
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languageQuery.Analyzer = analyzer_keyword.Name
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indexerQuery = bleve.NewConjunctionQuery(
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indexerQuery,
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languageQuery,
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)
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}
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from := (page - 1) * pageSize
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searchRequest := bleve.NewSearchRequestOptions(indexerQuery, pageSize, from, false)
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searchRequest.Fields = []string{"Content", "RepoID", "Language", "CommitID", "UpdatedAt"}
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searchRequest.IncludeLocations = true
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if len(language) == 0 {
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searchRequest.AddFacet("languages", bleve.NewFacetRequest("Language", 10))
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}
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result, err := b.indexer.SearchInContext(ctx, searchRequest)
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if err != nil {
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return 0, nil, nil, err
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}
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total := int64(result.Total)
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searchResults := make([]*SearchResult, len(result.Hits))
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for i, hit := range result.Hits {
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var startIndex, endIndex int = -1, -1
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for _, locations := range hit.Locations["Content"] {
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location := locations[0]
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locationStart := int(location.Start)
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locationEnd := int(location.End)
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if startIndex < 0 || locationStart < startIndex {
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startIndex = locationStart
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}
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if endIndex < 0 || locationEnd > endIndex {
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endIndex = locationEnd
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}
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}
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language := hit.Fields["Language"].(string)
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var updatedUnix timeutil.TimeStamp
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if t, err := time.Parse(time.RFC3339, hit.Fields["UpdatedAt"].(string)); err == nil {
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updatedUnix = timeutil.TimeStamp(t.Unix())
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}
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searchResults[i] = &SearchResult{
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RepoID: int64(hit.Fields["RepoID"].(float64)),
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StartIndex: startIndex,
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EndIndex: endIndex,
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Filename: filenameOfIndexerID(hit.ID),
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Content: hit.Fields["Content"].(string),
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CommitID: hit.Fields["CommitID"].(string),
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UpdatedUnix: updatedUnix,
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Language: language,
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Color: enry.GetColor(language),
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}
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}
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searchResultLanguages := make([]*SearchResultLanguages, 0, 10)
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if len(language) > 0 {
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// Use separate query to go get all language counts
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facetRequest := bleve.NewSearchRequestOptions(facetQuery, 1, 0, false)
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facetRequest.Fields = []string{"Content", "RepoID", "Language", "CommitID", "UpdatedAt"}
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facetRequest.IncludeLocations = true
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facetRequest.AddFacet("languages", bleve.NewFacetRequest("Language", 10))
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if result, err = b.indexer.Search(facetRequest); err != nil {
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return 0, nil, nil, err
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}
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}
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languagesFacet := result.Facets["languages"]
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for _, term := range languagesFacet.Terms.Terms() {
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if len(term.Term) == 0 {
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continue
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}
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searchResultLanguages = append(searchResultLanguages, &SearchResultLanguages{
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Language: term.Term,
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Color: enry.GetColor(term.Term),
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Count: term.Count,
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})
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}
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return total, searchResults, searchResultLanguages, nil
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}
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