A fork of Gitea (see branch `mj`) adding Majority Judgment Polls 𐄷 over Issues and Merge Requests. https://git.mieuxvoter.fr
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// Copyright 2019 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package code
import (
"bufio"
"fmt"
"io"
"io/ioutil"
"os"
"strconv"
"strings"
"time"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/analyze"
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/charset"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/timeutil"
"code.gitea.io/gitea/modules/util"
"github.com/blevesearch/bleve/v2"
analyzer_custom "github.com/blevesearch/bleve/v2/analysis/analyzer/custom"
analyzer_keyword "github.com/blevesearch/bleve/v2/analysis/analyzer/keyword"
"github.com/blevesearch/bleve/v2/analysis/token/lowercase"
"github.com/blevesearch/bleve/v2/analysis/token/unicodenorm"
"github.com/blevesearch/bleve/v2/analysis/tokenizer/unicode"
"github.com/blevesearch/bleve/v2/index/upsidedown"
"github.com/blevesearch/bleve/v2/mapping"
"github.com/blevesearch/bleve/v2/search/query"
"github.com/ethantkoenig/rupture"
"github.com/go-enry/go-enry/v2"
)
const unicodeNormalizeName = "unicodeNormalize"
const maxBatchSize = 16
// numericEqualityQuery a numeric equality query for the given value and field
func numericEqualityQuery(value int64, field string) *query.NumericRangeQuery {
f := float64(value)
tru := true
q := bleve.NewNumericRangeInclusiveQuery(&f, &f, &tru, &tru)
q.SetField(field)
return q
}
func addUnicodeNormalizeTokenFilter(m *mapping.IndexMappingImpl) error {
return m.AddCustomTokenFilter(unicodeNormalizeName, map[string]interface{}{
"type": unicodenorm.Name,
"form": unicodenorm.NFC,
})
}
// openBleveIndexer 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 openBleveIndexer(path string, latestVersion int) (bleve.Index, error) {
_, err := os.Stat(path)
if err != nil && os.IsNotExist(err) {
return nil, nil
} else if err != nil {
return nil, err
}
metadata, err := rupture.ReadIndexMetadata(path)
if err != nil {
return nil, err
}
if metadata.Version < latestVersion {
// the indexer is using a previous version, so we should delete it and
// re-populate
return nil, util.RemoveAll(path)
}
index, err := bleve.Open(path)
if err != nil && err == upsidedown.IncompatibleVersion {
// the indexer was built with a previous version of bleve, so we should
// delete it and re-populate
return nil, util.RemoveAll(path)
} else if err != nil {
return nil, err
}
return index, nil
}
// RepoIndexerData data stored in the repo indexer
type RepoIndexerData struct {
RepoID int64
CommitID string
Content string
Language string
UpdatedAt time.Time
}
// Type returns the document type, for bleve's mapping.Classifier interface.
func (d *RepoIndexerData) Type() string {
return repoIndexerDocType
}
const (
repoIndexerAnalyzer = "repoIndexerAnalyzer"
repoIndexerDocType = "repoIndexerDocType"
repoIndexerLatestVersion = 5
)
// createBleveIndexer create a bleve repo indexer if one does not already exist
func createBleveIndexer(path string, latestVersion int) (bleve.Index, error) {
docMapping := bleve.NewDocumentMapping()
numericFieldMapping := bleve.NewNumericFieldMapping()
numericFieldMapping.IncludeInAll = false
docMapping.AddFieldMappingsAt("RepoID", numericFieldMapping)
textFieldMapping := bleve.NewTextFieldMapping()
textFieldMapping.IncludeInAll = false
docMapping.AddFieldMappingsAt("Content", textFieldMapping)
termFieldMapping := bleve.NewTextFieldMapping()
termFieldMapping.IncludeInAll = false
termFieldMapping.Analyzer = analyzer_keyword.Name
docMapping.AddFieldMappingsAt("Language", termFieldMapping)
docMapping.AddFieldMappingsAt("CommitID", termFieldMapping)
timeFieldMapping := bleve.NewDateTimeFieldMapping()
timeFieldMapping.IncludeInAll = false
docMapping.AddFieldMappingsAt("UpdatedAt", timeFieldMapping)
mapping := bleve.NewIndexMapping()
if err := addUnicodeNormalizeTokenFilter(mapping); err != nil {
return nil, err
} else if err := mapping.AddCustomAnalyzer(repoIndexerAnalyzer, map[string]interface{}{
"type": analyzer_custom.Name,
"char_filters": []string{},
"tokenizer": unicode.Name,
"token_filters": []string{unicodeNormalizeName, lowercase.Name},
}); err != nil {
return nil, err
}
mapping.DefaultAnalyzer = repoIndexerAnalyzer
mapping.AddDocumentMapping(repoIndexerDocType, docMapping)
mapping.AddDocumentMapping("_all", bleve.NewDocumentDisabledMapping())
indexer, err := bleve.New(path, mapping)
if err != nil {
return nil, err
}
if err = rupture.WriteIndexMetadata(path, &rupture.IndexMetadata{
Version: latestVersion,
}); err != nil {
return nil, err
}
return indexer, nil
}
var (
_ Indexer = &BleveIndexer{}
)
// BleveIndexer represents a bleve indexer implementation
type BleveIndexer struct {
indexDir string
indexer bleve.Index
}
// NewBleveIndexer creates a new bleve local indexer
func NewBleveIndexer(indexDir string) (*BleveIndexer, bool, error) {
indexer := &BleveIndexer{
indexDir: indexDir,
}
created, err := indexer.init()
return indexer, created, err
}
func (b *BleveIndexer) addUpdate(batchWriter *io.PipeWriter, batchReader *bufio.Reader, commitSha string, update fileUpdate, repo *models.Repository, batch rupture.FlushingBatch) error {
// Ignore vendored files in code search
if setting.Indexer.ExcludeVendored && analyze.IsVendor(update.Filename) {
return nil
}
size := update.Size
if !update.Sized {
stdout, err := git.NewCommand("cat-file", "-s", update.BlobSha).
RunInDir(repo.RepoPath())
if err != nil {
return err
}
if size, err = strconv.ParseInt(strings.TrimSpace(stdout), 10, 64); err != nil {
return fmt.Errorf("Misformatted git cat-file output: %v", err)
}
}
if size > setting.Indexer.MaxIndexerFileSize {
return b.addDelete(update.Filename, repo, batch)
}
if _, err := batchWriter.Write([]byte(update.BlobSha + "\n")); err != nil {
return err
}
_, _, size, err := git.ReadBatchLine(batchReader)
if err != nil {
return err
}
fileContents, err := ioutil.ReadAll(io.LimitReader(batchReader, size))
if err != nil {
return err
} else if !base.IsTextFile(fileContents) {
// FIXME: UTF-16 files will probably fail here
return nil
}
id := filenameIndexerID(repo.ID, update.Filename)
return batch.Index(id, &RepoIndexerData{
RepoID: repo.ID,
CommitID: commitSha,
Content: string(charset.ToUTF8DropErrors(fileContents)),
Language: analyze.GetCodeLanguage(update.Filename, fileContents),
UpdatedAt: time.Now().UTC(),
})
}
func (b *BleveIndexer) addDelete(filename string, repo *models.Repository, batch rupture.FlushingBatch) error {
id := filenameIndexerID(repo.ID, filename)
return batch.Delete(id)
}
// init init the indexer
func (b *BleveIndexer) init() (bool, error) {
var err error
b.indexer, err = openBleveIndexer(b.indexDir, repoIndexerLatestVersion)
if err != nil {
return false, err
}
if b.indexer != nil {
return false, nil
}
b.indexer, err = createBleveIndexer(b.indexDir, repoIndexerLatestVersion)
if err != nil {
return false, err
}
return true, nil
}
// Close close the indexer
func (b *BleveIndexer) Close() {
log.Debug("Closing repo indexer")
if b.indexer != nil {
err := b.indexer.Close()
if err != nil {
log.Error("Error whilst closing the repository indexer: %v", err)
}
}
log.Info("PID: %d Repository Indexer closed", os.Getpid())
}
// Index indexes the data
func (b *BleveIndexer) Index(repo *models.Repository, sha string, changes *repoChanges) error {
batch := rupture.NewFlushingBatch(b.indexer, maxBatchSize)
if len(changes.Updates) > 0 {
batchWriter, batchReader, cancel := git.CatFileBatch(repo.RepoPath())
defer cancel()
for _, update := range changes.Updates {
if err := b.addUpdate(batchWriter, batchReader, sha, update, repo, batch); err != nil {
return err
}
}
cancel()
}
for _, filename := range changes.RemovedFilenames {
if err := b.addDelete(filename, repo, batch); err != nil {
return err
}
}
return batch.Flush()
}
// Delete deletes indexes by ids
func (b *BleveIndexer) Delete(repoID int64) error {
query := numericEqualityQuery(repoID, "RepoID")
searchRequest := bleve.NewSearchRequestOptions(query, 2147483647, 0, false)
result, err := b.indexer.Search(searchRequest)
if err != nil {
return err
}
batch := rupture.NewFlushingBatch(b.indexer, maxBatchSize)
for _, hit := range result.Hits {
if err = batch.Delete(hit.ID); err != nil {
return err
}
}
return batch.Flush()
}
// Search searches for files in the specified repo.
// Returns the matching file-paths
func (b *BleveIndexer) Search(repoIDs []int64, language, keyword string, page, pageSize int, isMatch bool) (int64, []*SearchResult, []*SearchResultLanguages, error) {
var (
indexerQuery query.Query
keywordQuery query.Query
)
if isMatch {
prefixQuery := bleve.NewPrefixQuery(keyword)
prefixQuery.FieldVal = "Content"
keywordQuery = prefixQuery
} else {
phraseQuery := bleve.NewMatchPhraseQuery(keyword)
phraseQuery.FieldVal = "Content"
phraseQuery.Analyzer = repoIndexerAnalyzer
keywordQuery = phraseQuery
}
if len(repoIDs) > 0 {
var repoQueries = make([]query.Query, 0, len(repoIDs))
for _, repoID := range repoIDs {
repoQueries = append(repoQueries, numericEqualityQuery(repoID, "RepoID"))
}
indexerQuery = bleve.NewConjunctionQuery(
bleve.NewDisjunctionQuery(repoQueries...),
keywordQuery,
)
} else {
indexerQuery = keywordQuery
}
// Save for reuse without language filter
facetQuery := indexerQuery
if len(language) > 0 {
languageQuery := bleve.NewMatchQuery(language)
languageQuery.FieldVal = "Language"
languageQuery.Analyzer = analyzer_keyword.Name
indexerQuery = bleve.NewConjunctionQuery(
indexerQuery,
languageQuery,
)
}
from := (page - 1) * pageSize
searchRequest := bleve.NewSearchRequestOptions(indexerQuery, pageSize, from, false)
searchRequest.Fields = []string{"Content", "RepoID", "Language", "CommitID", "UpdatedAt"}
searchRequest.IncludeLocations = true
if len(language) == 0 {
searchRequest.AddFacet("languages", bleve.NewFacetRequest("Language", 10))
}
result, err := b.indexer.Search(searchRequest)
if err != nil {
return 0, nil, nil, err
}
total := int64(result.Total)
searchResults := make([]*SearchResult, len(result.Hits))
for i, hit := range result.Hits {
var startIndex, endIndex int = -1, -1
for _, locations := range hit.Locations["Content"] {
location := locations[0]
locationStart := int(location.Start)
locationEnd := int(location.End)
if startIndex < 0 || locationStart < startIndex {
startIndex = locationStart
}
if endIndex < 0 || locationEnd > endIndex {
endIndex = locationEnd
}
}
language := hit.Fields["Language"].(string)
var updatedUnix timeutil.TimeStamp
if t, err := time.Parse(time.RFC3339, hit.Fields["UpdatedAt"].(string)); err == nil {
updatedUnix = timeutil.TimeStamp(t.Unix())
}
searchResults[i] = &SearchResult{
RepoID: int64(hit.Fields["RepoID"].(float64)),
StartIndex: startIndex,
EndIndex: endIndex,
Filename: filenameOfIndexerID(hit.ID),
Content: hit.Fields["Content"].(string),
CommitID: hit.Fields["CommitID"].(string),
UpdatedUnix: updatedUnix,
Language: language,
Color: enry.GetColor(language),
}
}
searchResultLanguages := make([]*SearchResultLanguages, 0, 10)
if len(language) > 0 {
// Use separate query to go get all language counts
facetRequest := bleve.NewSearchRequestOptions(facetQuery, 1, 0, false)
facetRequest.Fields = []string{"Content", "RepoID", "Language", "CommitID", "UpdatedAt"}
facetRequest.IncludeLocations = true
facetRequest.AddFacet("languages", bleve.NewFacetRequest("Language", 10))
if result, err = b.indexer.Search(facetRequest); err != nil {
return 0, nil, nil, err
}
}
languagesFacet := result.Facets["languages"]
for _, term := range languagesFacet.Terms {
if len(term.Term) == 0 {
continue
}
searchResultLanguages = append(searchResultLanguages, &SearchResultLanguages{
Language: term.Term,
Color: enry.GetColor(term.Term),
Count: term.Count,
})
}
return total, searchResults, searchResultLanguages, nil
}