mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-11-16 23:03:21 +01:00
24e64fe372
Same perl replacement as https://github.com/go-gitea/gitea/pull/25686 but for 1.20 to ease future backporting.
512 lines
14 KiB
Go
512 lines
14 KiB
Go
// Copyright 2020 The Gitea Authors. All rights reserved.
|
|
// SPDX-License-Identifier: MIT
|
|
|
|
package code
|
|
|
|
import (
|
|
"bufio"
|
|
"context"
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"net"
|
|
"strconv"
|
|
"strings"
|
|
"sync"
|
|
"time"
|
|
|
|
repo_model "code.gitea.io/gitea/models/repo"
|
|
"code.gitea.io/gitea/modules/analyze"
|
|
"code.gitea.io/gitea/modules/charset"
|
|
"code.gitea.io/gitea/modules/git"
|
|
"code.gitea.io/gitea/modules/graceful"
|
|
"code.gitea.io/gitea/modules/json"
|
|
"code.gitea.io/gitea/modules/log"
|
|
"code.gitea.io/gitea/modules/setting"
|
|
"code.gitea.io/gitea/modules/timeutil"
|
|
"code.gitea.io/gitea/modules/typesniffer"
|
|
|
|
"github.com/go-enry/go-enry/v2"
|
|
"github.com/olivere/elastic/v7"
|
|
)
|
|
|
|
const (
|
|
esRepoIndexerLatestVersion = 1
|
|
// multi-match-types, currently only 2 types are used
|
|
// Reference: https://www.elastic.co/guide/en/elasticsearch/reference/7.0/query-dsl-multi-match-query.html#multi-match-types
|
|
esMultiMatchTypeBestFields = "best_fields"
|
|
esMultiMatchTypePhrasePrefix = "phrase_prefix"
|
|
)
|
|
|
|
var _ Indexer = &ElasticSearchIndexer{}
|
|
|
|
// ElasticSearchIndexer implements Indexer interface
|
|
type ElasticSearchIndexer struct {
|
|
client *elastic.Client
|
|
indexerAliasName string
|
|
available bool
|
|
stopTimer chan struct{}
|
|
lock sync.RWMutex
|
|
}
|
|
|
|
// NewElasticSearchIndexer creates a new elasticsearch indexer
|
|
func NewElasticSearchIndexer(url, indexerName string) (*ElasticSearchIndexer, bool, error) {
|
|
opts := []elastic.ClientOptionFunc{
|
|
elastic.SetURL(url),
|
|
elastic.SetSniff(false),
|
|
elastic.SetHealthcheckInterval(10 * time.Second),
|
|
elastic.SetGzip(false),
|
|
}
|
|
|
|
logger := log.GetLogger(log.DEFAULT)
|
|
|
|
opts = append(opts, elastic.SetTraceLog(&log.PrintfLogger{Logf: logger.Trace}))
|
|
opts = append(opts, elastic.SetInfoLog(&log.PrintfLogger{Logf: logger.Info}))
|
|
opts = append(opts, elastic.SetErrorLog(&log.PrintfLogger{Logf: logger.Error}))
|
|
|
|
client, err := elastic.NewClient(opts...)
|
|
if err != nil {
|
|
return nil, false, err
|
|
}
|
|
|
|
indexer := &ElasticSearchIndexer{
|
|
client: client,
|
|
indexerAliasName: indexerName,
|
|
available: true,
|
|
stopTimer: make(chan struct{}),
|
|
}
|
|
|
|
ticker := time.NewTicker(10 * time.Second)
|
|
go func() {
|
|
for {
|
|
select {
|
|
case <-ticker.C:
|
|
indexer.checkAvailability()
|
|
case <-indexer.stopTimer:
|
|
ticker.Stop()
|
|
return
|
|
}
|
|
}
|
|
}()
|
|
|
|
exists, err := indexer.init()
|
|
if err != nil {
|
|
indexer.Close()
|
|
return nil, false, err
|
|
}
|
|
return indexer, !exists, err
|
|
}
|
|
|
|
const (
|
|
defaultMapping = `{
|
|
"mappings": {
|
|
"properties": {
|
|
"repo_id": {
|
|
"type": "long",
|
|
"index": true
|
|
},
|
|
"content": {
|
|
"type": "text",
|
|
"term_vector": "with_positions_offsets",
|
|
"index": true
|
|
},
|
|
"commit_id": {
|
|
"type": "keyword",
|
|
"index": true
|
|
},
|
|
"language": {
|
|
"type": "keyword",
|
|
"index": true
|
|
},
|
|
"updated_at": {
|
|
"type": "long",
|
|
"index": true
|
|
}
|
|
}
|
|
}
|
|
}`
|
|
)
|
|
|
|
func (b *ElasticSearchIndexer) realIndexerName() string {
|
|
return fmt.Sprintf("%s.v%d", b.indexerAliasName, esRepoIndexerLatestVersion)
|
|
}
|
|
|
|
// Init will initialize the indexer
|
|
func (b *ElasticSearchIndexer) init() (bool, error) {
|
|
ctx := graceful.GetManager().HammerContext()
|
|
exists, err := b.client.IndexExists(b.realIndexerName()).Do(ctx)
|
|
if err != nil {
|
|
return false, b.checkError(err)
|
|
}
|
|
if !exists {
|
|
mapping := defaultMapping
|
|
|
|
createIndex, err := b.client.CreateIndex(b.realIndexerName()).BodyString(mapping).Do(ctx)
|
|
if err != nil {
|
|
return false, b.checkError(err)
|
|
}
|
|
if !createIndex.Acknowledged {
|
|
return false, fmt.Errorf("create index %s with %s failed", b.realIndexerName(), mapping)
|
|
}
|
|
}
|
|
|
|
// check version
|
|
r, err := b.client.Aliases().Do(ctx)
|
|
if err != nil {
|
|
return false, b.checkError(err)
|
|
}
|
|
|
|
realIndexerNames := r.IndicesByAlias(b.indexerAliasName)
|
|
if len(realIndexerNames) < 1 {
|
|
res, err := b.client.Alias().
|
|
Add(b.realIndexerName(), b.indexerAliasName).
|
|
Do(ctx)
|
|
if err != nil {
|
|
return false, b.checkError(err)
|
|
}
|
|
if !res.Acknowledged {
|
|
return false, fmt.Errorf("create alias %s to index %s failed", b.indexerAliasName, b.realIndexerName())
|
|
}
|
|
} else if len(realIndexerNames) >= 1 && realIndexerNames[0] < b.realIndexerName() {
|
|
log.Warn("Found older gitea indexer named %s, but we will create a new one %s and keep the old NOT DELETED. You can delete the old version after the upgrade succeed.",
|
|
realIndexerNames[0], b.realIndexerName())
|
|
res, err := b.client.Alias().
|
|
Remove(realIndexerNames[0], b.indexerAliasName).
|
|
Add(b.realIndexerName(), b.indexerAliasName).
|
|
Do(ctx)
|
|
if err != nil {
|
|
return false, b.checkError(err)
|
|
}
|
|
if !res.Acknowledged {
|
|
return false, fmt.Errorf("change alias %s to index %s failed", b.indexerAliasName, b.realIndexerName())
|
|
}
|
|
}
|
|
|
|
return exists, nil
|
|
}
|
|
|
|
// Ping checks if elastic is available
|
|
func (b *ElasticSearchIndexer) Ping() bool {
|
|
b.lock.RLock()
|
|
defer b.lock.RUnlock()
|
|
return b.available
|
|
}
|
|
|
|
func (b *ElasticSearchIndexer) addUpdate(ctx context.Context, batchWriter git.WriteCloserError, batchReader *bufio.Reader, sha string, update fileUpdate, repo *repo_model.Repository) ([]elastic.BulkableRequest, error) {
|
|
// Ignore vendored files in code search
|
|
if setting.Indexer.ExcludeVendored && analyze.IsVendor(update.Filename) {
|
|
return nil, nil
|
|
}
|
|
|
|
size := update.Size
|
|
var err error
|
|
if !update.Sized {
|
|
var stdout string
|
|
stdout, _, err = git.NewCommand(ctx, "cat-file", "-s").AddDynamicArguments(update.BlobSha).RunStdString(&git.RunOpts{Dir: repo.RepoPath()})
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if size, err = strconv.ParseInt(strings.TrimSpace(stdout), 10, 64); err != nil {
|
|
return nil, fmt.Errorf("misformatted git cat-file output: %w", err)
|
|
}
|
|
}
|
|
|
|
if size > setting.Indexer.MaxIndexerFileSize {
|
|
return []elastic.BulkableRequest{b.addDelete(update.Filename, repo)}, nil
|
|
}
|
|
|
|
if _, err := batchWriter.Write([]byte(update.BlobSha + "\n")); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
_, _, size, err = git.ReadBatchLine(batchReader)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
fileContents, err := io.ReadAll(io.LimitReader(batchReader, size))
|
|
if err != nil {
|
|
return nil, err
|
|
} else if !typesniffer.DetectContentType(fileContents).IsText() {
|
|
// FIXME: UTF-16 files will probably fail here
|
|
return nil, nil
|
|
}
|
|
|
|
if _, err = batchReader.Discard(1); err != nil {
|
|
return nil, err
|
|
}
|
|
id := filenameIndexerID(repo.ID, update.Filename)
|
|
|
|
return []elastic.BulkableRequest{
|
|
elastic.NewBulkIndexRequest().
|
|
Index(b.indexerAliasName).
|
|
Id(id).
|
|
Doc(map[string]any{
|
|
"repo_id": repo.ID,
|
|
"content": string(charset.ToUTF8DropErrors(fileContents)),
|
|
"commit_id": sha,
|
|
"language": analyze.GetCodeLanguage(update.Filename, fileContents),
|
|
"updated_at": timeutil.TimeStampNow(),
|
|
}),
|
|
}, nil
|
|
}
|
|
|
|
func (b *ElasticSearchIndexer) addDelete(filename string, repo *repo_model.Repository) elastic.BulkableRequest {
|
|
id := filenameIndexerID(repo.ID, filename)
|
|
return elastic.NewBulkDeleteRequest().
|
|
Index(b.indexerAliasName).
|
|
Id(id)
|
|
}
|
|
|
|
// Index will save the index data
|
|
func (b *ElasticSearchIndexer) Index(ctx context.Context, repo *repo_model.Repository, sha string, changes *repoChanges) error {
|
|
reqs := make([]elastic.BulkableRequest, 0)
|
|
if len(changes.Updates) > 0 {
|
|
// 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!
|
|
if err := git.EnsureValidGitRepository(ctx, repo.RepoPath()); err != nil {
|
|
log.Error("Unable to open git repo: %s for %-v: %v", repo.RepoPath(), repo, err)
|
|
return err
|
|
}
|
|
|
|
batchWriter, batchReader, cancel := git.CatFileBatch(ctx, repo.RepoPath())
|
|
defer cancel()
|
|
|
|
for _, update := range changes.Updates {
|
|
updateReqs, err := b.addUpdate(ctx, batchWriter, batchReader, sha, update, repo)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if len(updateReqs) > 0 {
|
|
reqs = append(reqs, updateReqs...)
|
|
}
|
|
}
|
|
cancel()
|
|
}
|
|
|
|
for _, filename := range changes.RemovedFilenames {
|
|
reqs = append(reqs, b.addDelete(filename, repo))
|
|
}
|
|
|
|
if len(reqs) > 0 {
|
|
_, err := b.client.Bulk().
|
|
Index(b.indexerAliasName).
|
|
Add(reqs...).
|
|
Do(ctx)
|
|
return b.checkError(err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Delete deletes indexes by ids
|
|
func (b *ElasticSearchIndexer) Delete(repoID int64) error {
|
|
_, err := b.client.DeleteByQuery(b.indexerAliasName).
|
|
Query(elastic.NewTermsQuery("repo_id", repoID)).
|
|
Do(graceful.GetManager().HammerContext())
|
|
return b.checkError(err)
|
|
}
|
|
|
|
// indexPos find words positions for start and the following end on content. It will
|
|
// return the beginning position of the first start and the ending position of the
|
|
// first end following the start string.
|
|
// If not found any of the positions, it will return -1, -1.
|
|
func indexPos(content, start, end string) (int, int) {
|
|
startIdx := strings.Index(content, start)
|
|
if startIdx < 0 {
|
|
return -1, -1
|
|
}
|
|
endIdx := strings.Index(content[startIdx+len(start):], end)
|
|
if endIdx < 0 {
|
|
return -1, -1
|
|
}
|
|
return startIdx, startIdx + len(start) + endIdx + len(end)
|
|
}
|
|
|
|
func convertResult(searchResult *elastic.SearchResult, kw string, pageSize int) (int64, []*SearchResult, []*SearchResultLanguages, error) {
|
|
hits := make([]*SearchResult, 0, pageSize)
|
|
for _, hit := range searchResult.Hits.Hits {
|
|
// FIXME: There is no way to get the position the keyword on the content currently on the same request.
|
|
// So we get it from content, this may made the query slower. See
|
|
// https://discuss.elastic.co/t/fetching-position-of-keyword-in-matched-document/94291
|
|
var startIndex, endIndex int
|
|
c, ok := hit.Highlight["content"]
|
|
if ok && len(c) > 0 {
|
|
// FIXME: Since the highlighting content will include <em> and </em> for the keywords,
|
|
// now we should find the positions. But how to avoid html content which contains the
|
|
// <em> and </em> tags? If elastic search has handled that?
|
|
startIndex, endIndex = indexPos(c[0], "<em>", "</em>")
|
|
if startIndex == -1 {
|
|
panic(fmt.Sprintf("1===%s,,,%#v,,,%s", kw, hit.Highlight, c[0]))
|
|
}
|
|
} else {
|
|
panic(fmt.Sprintf("2===%#v", hit.Highlight))
|
|
}
|
|
|
|
repoID, fileName := parseIndexerID(hit.Id)
|
|
res := make(map[string]any)
|
|
if err := json.Unmarshal(hit.Source, &res); err != nil {
|
|
return 0, nil, nil, err
|
|
}
|
|
|
|
language := res["language"].(string)
|
|
|
|
hits = append(hits, &SearchResult{
|
|
RepoID: repoID,
|
|
Filename: fileName,
|
|
CommitID: res["commit_id"].(string),
|
|
Content: res["content"].(string),
|
|
UpdatedUnix: timeutil.TimeStamp(res["updated_at"].(float64)),
|
|
Language: language,
|
|
StartIndex: startIndex,
|
|
EndIndex: endIndex - 9, // remove the length <em></em> since we give Content the original data
|
|
Color: enry.GetColor(language),
|
|
})
|
|
}
|
|
|
|
return searchResult.TotalHits(), hits, extractAggs(searchResult), nil
|
|
}
|
|
|
|
func extractAggs(searchResult *elastic.SearchResult) []*SearchResultLanguages {
|
|
var searchResultLanguages []*SearchResultLanguages
|
|
agg, found := searchResult.Aggregations.Terms("language")
|
|
if found {
|
|
searchResultLanguages = make([]*SearchResultLanguages, 0, 10)
|
|
|
|
for _, bucket := range agg.Buckets {
|
|
searchResultLanguages = append(searchResultLanguages, &SearchResultLanguages{
|
|
Language: bucket.Key.(string),
|
|
Color: enry.GetColor(bucket.Key.(string)),
|
|
Count: int(bucket.DocCount),
|
|
})
|
|
}
|
|
}
|
|
return searchResultLanguages
|
|
}
|
|
|
|
// Search searches for codes and language stats by given conditions.
|
|
func (b *ElasticSearchIndexer) Search(ctx context.Context, repoIDs []int64, language, keyword string, page, pageSize int, isMatch bool) (int64, []*SearchResult, []*SearchResultLanguages, error) {
|
|
searchType := esMultiMatchTypeBestFields
|
|
if isMatch {
|
|
searchType = esMultiMatchTypePhrasePrefix
|
|
}
|
|
|
|
kwQuery := elastic.NewMultiMatchQuery(keyword, "content").Type(searchType)
|
|
query := elastic.NewBoolQuery()
|
|
query = query.Must(kwQuery)
|
|
if len(repoIDs) > 0 {
|
|
repoStrs := make([]any, 0, len(repoIDs))
|
|
for _, repoID := range repoIDs {
|
|
repoStrs = append(repoStrs, repoID)
|
|
}
|
|
repoQuery := elastic.NewTermsQuery("repo_id", repoStrs...)
|
|
query = query.Must(repoQuery)
|
|
}
|
|
|
|
var (
|
|
start int
|
|
kw = "<em>" + keyword + "</em>"
|
|
aggregation = elastic.NewTermsAggregation().Field("language").Size(10).OrderByCountDesc()
|
|
)
|
|
|
|
if page > 0 {
|
|
start = (page - 1) * pageSize
|
|
}
|
|
|
|
if len(language) == 0 {
|
|
searchResult, err := b.client.Search().
|
|
Index(b.indexerAliasName).
|
|
Aggregation("language", aggregation).
|
|
Query(query).
|
|
Highlight(
|
|
elastic.NewHighlight().
|
|
Field("content").
|
|
NumOfFragments(0). // return all highting content on fragments
|
|
HighlighterType("fvh"),
|
|
).
|
|
Sort("repo_id", true).
|
|
From(start).Size(pageSize).
|
|
Do(ctx)
|
|
if err != nil {
|
|
return 0, nil, nil, b.checkError(err)
|
|
}
|
|
|
|
return convertResult(searchResult, kw, pageSize)
|
|
}
|
|
|
|
langQuery := elastic.NewMatchQuery("language", language)
|
|
countResult, err := b.client.Search().
|
|
Index(b.indexerAliasName).
|
|
Aggregation("language", aggregation).
|
|
Query(query).
|
|
Size(0). // We only needs stats information
|
|
Do(ctx)
|
|
if err != nil {
|
|
return 0, nil, nil, b.checkError(err)
|
|
}
|
|
|
|
query = query.Must(langQuery)
|
|
searchResult, err := b.client.Search().
|
|
Index(b.indexerAliasName).
|
|
Query(query).
|
|
Highlight(
|
|
elastic.NewHighlight().
|
|
Field("content").
|
|
NumOfFragments(0). // return all highting content on fragments
|
|
HighlighterType("fvh"),
|
|
).
|
|
Sort("repo_id", true).
|
|
From(start).Size(pageSize).
|
|
Do(ctx)
|
|
if err != nil {
|
|
return 0, nil, nil, b.checkError(err)
|
|
}
|
|
|
|
total, hits, _, err := convertResult(searchResult, kw, pageSize)
|
|
|
|
return total, hits, extractAggs(countResult), err
|
|
}
|
|
|
|
// Close implements indexer
|
|
func (b *ElasticSearchIndexer) Close() {
|
|
select {
|
|
case <-b.stopTimer:
|
|
default:
|
|
close(b.stopTimer)
|
|
}
|
|
}
|
|
|
|
func (b *ElasticSearchIndexer) checkError(err error) error {
|
|
var opErr *net.OpError
|
|
if !(elastic.IsConnErr(err) || (errors.As(err, &opErr) && (opErr.Op == "dial" || opErr.Op == "read"))) {
|
|
return err
|
|
}
|
|
|
|
b.setAvailability(false)
|
|
|
|
return err
|
|
}
|
|
|
|
func (b *ElasticSearchIndexer) checkAvailability() {
|
|
if b.Ping() {
|
|
return
|
|
}
|
|
|
|
// Request cluster state to check if elastic is available again
|
|
_, err := b.client.ClusterState().Do(graceful.GetManager().ShutdownContext())
|
|
if err != nil {
|
|
b.setAvailability(false)
|
|
return
|
|
}
|
|
|
|
b.setAvailability(true)
|
|
}
|
|
|
|
func (b *ElasticSearchIndexer) setAvailability(available bool) {
|
|
b.lock.Lock()
|
|
defer b.lock.Unlock()
|
|
|
|
if b.available == available {
|
|
return
|
|
}
|
|
|
|
b.available = available
|
|
}
|