mirror of
https://github.com/go-gitea/gitea
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b0d5bb909b
* comment
334 lines
9.0 KiB
Go
334 lines
9.0 KiB
Go
// Copyright 2017 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 models
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import (
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"io/ioutil"
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"os"
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"path"
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"strconv"
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"strings"
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"code.gitea.io/git"
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"code.gitea.io/gitea/modules/base"
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"code.gitea.io/gitea/modules/indexer"
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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/Unknwon/com"
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)
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// RepoIndexerStatus status of a repo's entry in the repo indexer
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// For now, implicitly refers to default branch
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type RepoIndexerStatus struct {
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ID int64 `xorm:"pk autoincr"`
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RepoID int64 `xorm:"INDEX"`
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CommitSha string `xorm:"VARCHAR(40)"`
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}
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func (repo *Repository) getIndexerStatus() error {
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if repo.IndexerStatus != nil {
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return nil
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}
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status := &RepoIndexerStatus{RepoID: repo.ID}
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has, err := x.Get(status)
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if err != nil {
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return err
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} else if !has {
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status.CommitSha = ""
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}
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repo.IndexerStatus = status
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return nil
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}
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func (repo *Repository) updateIndexerStatus(sha string) error {
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if err := repo.getIndexerStatus(); err != nil {
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return err
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}
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if len(repo.IndexerStatus.CommitSha) == 0 {
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repo.IndexerStatus.CommitSha = sha
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_, err := x.Insert(repo.IndexerStatus)
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return err
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}
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repo.IndexerStatus.CommitSha = sha
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_, err := x.ID(repo.IndexerStatus.ID).Cols("commit_sha").
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Update(repo.IndexerStatus)
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return err
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}
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type repoIndexerOperation struct {
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repo *Repository
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deleted bool
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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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repoIndexerOperationQueue = make(chan repoIndexerOperation, setting.Indexer.UpdateQueueLength)
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indexer.InitRepoIndexer(populateRepoIndexerAsynchronously)
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go processRepoIndexerOperationQueue()
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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 := x.Table("repository").Exist()
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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 := x.Where("1=1").Delete(new(RepoIndexerStatus)); err != nil {
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return err
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}
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var maxRepoID int64
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if _, err = x.Select("MAX(id)").Table("repository").Get(&maxRepoID); 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([]*Repository, 0, RepositoryListDefaultPageSize)
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err := x.Where("id <= ?", maxRepoID).
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OrderBy("id DESC").
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Limit(RepositoryListDefaultPageSize).
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Find(&repos)
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if err != nil {
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log.Error(4, "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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repo: repo,
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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(repo *Repository) error {
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changes, err := getRepoChanges(repo)
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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 := indexer.RepoIndexerBatch()
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for _, filename := range changes.UpdatedFiles {
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if err := addUpdate(filename, 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.RemovedFiles {
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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 updateLastIndexSync(repo)
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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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UpdatedFiles []string
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RemovedFiles []string
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}
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// getRepoChanges returns changes to repo since last indexer update
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func getRepoChanges(repo *Repository) (*repoChanges, error) {
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repoWorkingPool.CheckIn(com.ToStr(repo.ID))
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defer repoWorkingPool.CheckOut(com.ToStr(repo.ID))
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if err := repo.UpdateLocalCopyBranch(""); err != nil {
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return nil, err
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} else if !git.IsBranchExist(repo.LocalCopyPath(), repo.DefaultBranch) {
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// repo does not have any commits yet, so nothing to update
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return nil, nil
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} else if err = repo.UpdateLocalCopyBranch(repo.DefaultBranch); err != nil {
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return nil, err
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} else 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)
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}
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return nonGenesisChanges(repo)
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}
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func addUpdate(filename string, repo *Repository, batch *indexer.Batch) error {
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filepath := path.Join(repo.LocalCopyPath(), filename)
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if stat, err := os.Stat(filepath); err != nil {
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return err
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} else if stat.Size() > setting.Indexer.MaxIndexerFileSize {
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return nil
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} else if stat.IsDir() {
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// file could actually be a directory, if it is the root of a submodule.
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// We do not index submodule contents, so don't do anything.
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return nil
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}
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fileContents, err := ioutil.ReadFile(filepath)
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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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return nil
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}
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return batch.Add(indexer.RepoIndexerUpdate{
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Filepath: filename,
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Op: indexer.RepoIndexerOpUpdate,
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Data: &indexer.RepoIndexerData{
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RepoID: repo.ID,
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Content: string(fileContents),
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},
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})
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}
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func addDelete(filename string, repo *Repository, batch *indexer.Batch) error {
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return batch.Add(indexer.RepoIndexerUpdate{
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Filepath: filename,
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Op: indexer.RepoIndexerOpDelete,
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Data: &indexer.RepoIndexerData{
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RepoID: repo.ID,
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},
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})
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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 *Repository) (*repoChanges, error) {
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var changes repoChanges
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stdout, err := git.NewCommand("ls-files").RunInDir(repo.LocalCopyPath())
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if err != nil {
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return nil, err
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}
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for _, line := range strings.Split(stdout, "\n") {
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filename := strings.TrimSpace(line)
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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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changes.UpdatedFiles = append(changes.UpdatedFiles, filename)
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}
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return &changes, nil
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}
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// nonGenesisChanges get changes since the previous indexer update
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func nonGenesisChanges(repo *Repository) (*repoChanges, error) {
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diffCmd := git.NewCommand("diff", "--name-status",
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repo.IndexerStatus.CommitSha, "HEAD")
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stdout, err := diffCmd.RunInDir(repo.LocalCopyPath())
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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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if err = indexer.DeleteRepoFromIndexer(repo.ID); err != nil {
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return nil, err
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}
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return genesisChanges(repo)
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}
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var changes repoChanges
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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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changes.UpdatedFiles = append(changes.UpdatedFiles, filename)
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case 'D':
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changes.RemovedFiles = append(changes.RemovedFiles, 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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return &changes, nil
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}
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func updateLastIndexSync(repo *Repository) error {
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stdout, err := git.NewCommand("rev-parse", "HEAD").RunInDir(repo.LocalCopyPath())
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if err != nil {
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return err
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}
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sha := strings.TrimSpace(stdout)
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return repo.updateIndexerStatus(sha)
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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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if op.deleted {
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if err := indexer.DeleteRepoFromIndexer(op.repo.ID); err != nil {
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log.Error(4, "DeleteRepoFromIndexer: %v", err)
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}
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} else {
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if err := updateRepoIndexer(op.repo); err != nil {
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log.Error(4, "updateRepoIndexer: %v", err)
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}
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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 *Repository) {
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addOperationToQueue(repoIndexerOperation{repo: repo, deleted: true})
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}
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// UpdateRepoIndexer update a repository's entries in the indexer
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func UpdateRepoIndexer(repo *Repository) {
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addOperationToQueue(repoIndexerOperation{repo: repo, deleted: false})
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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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