365 lines
10 KiB
Go
365 lines
10 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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"fmt"
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"strconv"
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"strings"
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"time"
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"code.gitea.io/gitea/models"
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"code.gitea.io/gitea/modules/base"
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"code.gitea.io/gitea/modules/charset"
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"code.gitea.io/gitea/modules/git"
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"code.gitea.io/gitea/modules/graceful"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/setting"
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"github.com/ethantkoenig/rupture"
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)
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type repoIndexerOperation struct {
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repoID int64
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deleted bool
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watchers []chan<- error
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}
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var repoIndexerOperationQueue chan repoIndexerOperation
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// InitRepoIndexer initialize the repo indexer
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func InitRepoIndexer() {
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if !setting.Indexer.RepoIndexerEnabled {
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return
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}
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waitChannel := make(chan time.Duration)
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repoIndexerOperationQueue = make(chan repoIndexerOperation, setting.Indexer.UpdateQueueLength)
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go func() {
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start := time.Now()
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log.Info("Initializing Repository Indexer")
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initRepoIndexer(populateRepoIndexerAsynchronously)
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go processRepoIndexerOperationQueue()
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waitChannel <- time.Since(start)
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}()
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if setting.Indexer.StartupTimeout > 0 {
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go func() {
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timeout := setting.Indexer.StartupTimeout
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if graceful.Manager.IsChild() && setting.GracefulHammerTime > 0 {
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timeout += setting.GracefulHammerTime
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}
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select {
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case duration := <-waitChannel:
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log.Info("Repository Indexer Initialization took %v", duration)
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case <-time.After(timeout):
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log.Fatal("Repository Indexer Initialization Timed-Out after: %v", timeout)
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}
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}()
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}
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}
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// populateRepoIndexerAsynchronously asynchronously populates the repo indexer
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// with pre-existing data. This should only be run when the indexer is created
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// for the first time.
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func populateRepoIndexerAsynchronously() error {
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exist, err := models.IsTableNotEmpty("repository")
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if err != nil {
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return err
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} else if !exist {
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return nil
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}
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// if there is any existing repo indexer metadata in the DB, delete it
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// since we are starting afresh. Also, xorm requires deletes to have a
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// condition, and we want to delete everything, thus 1=1.
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if err := models.DeleteAllRecords("repo_indexer_status"); err != nil {
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return err
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}
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var maxRepoID int64
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if maxRepoID, err = models.GetMaxID("repository"); err != nil {
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return err
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}
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go populateRepoIndexer(maxRepoID)
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return nil
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}
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// populateRepoIndexer populate the repo indexer with pre-existing data. This
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// should only be run when the indexer is created for the first time.
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func populateRepoIndexer(maxRepoID int64) {
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log.Info("Populating the repo indexer with existing repositories")
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// start with the maximum existing repo ID and work backwards, so that we
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// don't include repos that are created after gitea starts; such repos will
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// already be added to the indexer, and we don't need to add them again.
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for maxRepoID > 0 {
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repos := make([]*models.Repository, 0, models.RepositoryListDefaultPageSize)
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err := models.FindByMaxID(maxRepoID, models.RepositoryListDefaultPageSize, &repos)
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if err != nil {
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log.Error("populateRepoIndexer: %v", err)
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return
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} else if len(repos) == 0 {
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break
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}
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for _, repo := range repos {
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repoIndexerOperationQueue <- repoIndexerOperation{
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repoID: repo.ID,
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deleted: false,
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}
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maxRepoID = repo.ID - 1
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}
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}
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log.Info("Done populating the repo indexer with existing repositories")
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}
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func updateRepoIndexer(repoID int64) error {
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repo, err := models.GetRepositoryByID(repoID)
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if err != nil {
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return err
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}
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sha, err := getDefaultBranchSha(repo)
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if err != nil {
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return err
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}
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changes, err := getRepoChanges(repo, sha)
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if err != nil {
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return err
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} else if changes == nil {
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return nil
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}
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batch := RepoIndexerBatch()
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for _, update := range changes.Updates {
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if err := addUpdate(update, repo, batch); err != nil {
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return err
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}
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}
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for _, filename := range changes.RemovedFilenames {
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if err := addDelete(filename, repo, batch); err != nil {
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return err
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}
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}
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if err = batch.Flush(); err != nil {
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return err
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}
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return repo.UpdateIndexerStatus(sha)
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}
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// repoChanges changes (file additions/updates/removals) to a repo
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type repoChanges struct {
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Updates []fileUpdate
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RemovedFilenames []string
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}
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type fileUpdate struct {
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Filename string
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BlobSha string
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}
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func getDefaultBranchSha(repo *models.Repository) (string, error) {
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stdout, err := git.NewCommand("show-ref", "-s", git.BranchPrefix+repo.DefaultBranch).RunInDir(repo.RepoPath())
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if err != nil {
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return "", err
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}
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return strings.TrimSpace(stdout), nil
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}
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// getRepoChanges returns changes to repo since last indexer update
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func getRepoChanges(repo *models.Repository, revision string) (*repoChanges, error) {
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if err := repo.GetIndexerStatus(); err != nil {
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return nil, err
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}
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if len(repo.IndexerStatus.CommitSha) == 0 {
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return genesisChanges(repo, revision)
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}
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return nonGenesisChanges(repo, revision)
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}
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func addUpdate(update fileUpdate, repo *models.Repository, batch rupture.FlushingBatch) error {
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stdout, err := git.NewCommand("cat-file", "-s", update.BlobSha).
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RunInDir(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.Atoi(strings.TrimSpace(stdout)); err != nil {
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return fmt.Errorf("Misformatted git cat-file output: %v", err)
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} else if int64(size) > setting.Indexer.MaxIndexerFileSize {
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return addDelete(update.Filename, repo, batch)
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}
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fileContents, err := git.NewCommand("cat-file", "blob", update.BlobSha).
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RunInDirBytes(repo.RepoPath())
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if err != nil {
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return err
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} else if !base.IsTextFile(fileContents) {
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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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indexerUpdate := RepoIndexerUpdate{
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Filepath: update.Filename,
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Op: RepoIndexerOpUpdate,
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Data: &RepoIndexerData{
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RepoID: repo.ID,
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Content: string(charset.ToUTF8DropErrors(fileContents)),
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},
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}
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return indexerUpdate.AddToFlushingBatch(batch)
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}
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func addDelete(filename string, repo *models.Repository, batch rupture.FlushingBatch) error {
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indexerUpdate := RepoIndexerUpdate{
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Filepath: filename,
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Op: RepoIndexerOpDelete,
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Data: &RepoIndexerData{
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RepoID: repo.ID,
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},
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}
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return indexerUpdate.AddToFlushingBatch(batch)
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}
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func isIndexable(entry *git.TreeEntry) bool {
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if !entry.IsRegular() && !entry.IsExecutable() {
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return false
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}
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name := strings.ToLower(entry.Name())
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for _, g := range setting.Indexer.ExcludePatterns {
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if g.Match(name) {
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return false
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}
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}
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for _, g := range setting.Indexer.IncludePatterns {
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if g.Match(name) {
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return true
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}
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}
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return len(setting.Indexer.IncludePatterns) == 0
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}
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// parseGitLsTreeOutput parses the output of a `git ls-tree -r --full-name` command
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func parseGitLsTreeOutput(stdout []byte) ([]fileUpdate, error) {
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entries, err := git.ParseTreeEntries(stdout)
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if err != nil {
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return nil, err
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}
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var idxCount = 0
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updates := make([]fileUpdate, len(entries))
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for _, entry := range entries {
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if isIndexable(entry) {
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updates[idxCount] = fileUpdate{
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Filename: entry.Name(),
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BlobSha: entry.ID.String(),
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}
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idxCount++
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}
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}
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return updates[:idxCount], nil
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}
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// genesisChanges get changes to add repo to the indexer for the first time
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func genesisChanges(repo *models.Repository, revision string) (*repoChanges, error) {
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var changes repoChanges
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stdout, err := git.NewCommand("ls-tree", "--full-tree", "-r", revision).
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RunInDirBytes(repo.RepoPath())
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if err != nil {
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return nil, err
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}
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changes.Updates, err = parseGitLsTreeOutput(stdout)
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return &changes, err
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}
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// nonGenesisChanges get changes since the previous indexer update
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func nonGenesisChanges(repo *models.Repository, revision string) (*repoChanges, error) {
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diffCmd := git.NewCommand("diff", "--name-status",
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repo.IndexerStatus.CommitSha, revision)
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stdout, err := diffCmd.RunInDir(repo.RepoPath())
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if err != nil {
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// previous commit sha may have been removed by a force push, so
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// try rebuilding from scratch
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log.Warn("git diff: %v", err)
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if err = deleteRepoFromIndexer(repo.ID); err != nil {
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return nil, err
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}
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return genesisChanges(repo, revision)
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}
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var changes repoChanges
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updatedFilenames := make([]string, 0, 10)
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for _, line := range strings.Split(stdout, "\n") {
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line = strings.TrimSpace(line)
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if len(line) == 0 {
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continue
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}
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filename := strings.TrimSpace(line[1:])
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if len(filename) == 0 {
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continue
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} else if filename[0] == '"' {
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filename, err = strconv.Unquote(filename)
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if err != nil {
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return nil, err
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}
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}
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switch status := line[0]; status {
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case 'M', 'A':
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updatedFilenames = append(updatedFilenames, filename)
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case 'D':
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changes.RemovedFilenames = append(changes.RemovedFilenames, filename)
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default:
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log.Warn("Unrecognized status: %c (line=%s)", status, line)
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}
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}
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cmd := git.NewCommand("ls-tree", "--full-tree", revision, "--")
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cmd.AddArguments(updatedFilenames...)
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lsTreeStdout, err := cmd.RunInDirBytes(repo.RepoPath())
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if err != nil {
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return nil, err
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}
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changes.Updates, err = parseGitLsTreeOutput(lsTreeStdout)
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return &changes, err
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}
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func processRepoIndexerOperationQueue() {
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for {
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op := <-repoIndexerOperationQueue
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var err error
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if op.deleted {
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if err = deleteRepoFromIndexer(op.repoID); err != nil {
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log.Error("deleteRepoFromIndexer: %v", err)
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}
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} else {
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if err = updateRepoIndexer(op.repoID); err != nil {
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log.Error("updateRepoIndexer: %v", err)
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}
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}
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for _, watcher := range op.watchers {
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watcher <- err
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}
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}
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}
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// DeleteRepoFromIndexer remove all of a repository's entries from the indexer
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func DeleteRepoFromIndexer(repo *models.Repository, watchers ...chan<- error) {
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addOperationToQueue(repoIndexerOperation{repoID: repo.ID, deleted: true, watchers: watchers})
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}
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// UpdateRepoIndexer update a repository's entries in the indexer
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func UpdateRepoIndexer(repo *models.Repository, watchers ...chan<- error) {
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addOperationToQueue(repoIndexerOperation{repoID: repo.ID, deleted: false, watchers: watchers})
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}
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func addOperationToQueue(op repoIndexerOperation) {
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if !setting.Indexer.RepoIndexerEnabled {
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return
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}
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select {
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case repoIndexerOperationQueue <- op:
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break
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default:
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go func() {
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repoIndexerOperationQueue <- op
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}()
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}
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}
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