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forgejo/modules/git/notes_gogit.go
zeripath 001dbf100d
Defer Last Commit Info (#16467)
One of the biggest reasons for slow repository browsing is that we wait
until last commit information has been generated for all files in the
repository.

This PR proposes deferring this generation to a new POST endpoint that
does the look up outside of the main page request.

Signed-off-by: Andrew Thornton <art27@cantab.net>
2021-10-08 15:08:22 +02:00

87 lines
2.3 KiB
Go

// 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.
//go:build gogit
// +build gogit
package git
import (
"context"
"io"
"code.gitea.io/gitea/modules/log"
"github.com/go-git/go-git/v5/plumbing/object"
)
// GetNote retrieves the git-notes data for a given commit.
// FIXME: Add LastCommitCache support
func GetNote(ctx context.Context, repo *Repository, commitID string, note *Note) error {
log.Trace("Searching for git note corresponding to the commit %q in the repository %q", commitID, repo.Path)
notes, err := repo.GetCommit(NotesRef)
if err != nil {
log.Error("Unable to get commit from ref %q. Error: %v", NotesRef, err)
return err
}
remainingCommitID := commitID
path := ""
currentTree := notes.Tree.gogitTree
log.Trace("Found tree with ID %q while searching for git note corresponding to the commit %q", currentTree.Entries[0].Name, commitID)
var file *object.File
for len(remainingCommitID) > 2 {
file, err = currentTree.File(remainingCommitID)
if err == nil {
path += remainingCommitID
break
}
if err == object.ErrFileNotFound {
currentTree, err = currentTree.Tree(remainingCommitID[0:2])
path += remainingCommitID[0:2] + "/"
remainingCommitID = remainingCommitID[2:]
}
if err != nil {
if err == object.ErrDirectoryNotFound {
return ErrNotExist{ID: remainingCommitID, RelPath: path}
}
log.Error("Unable to find git note corresponding to the commit %q. Error: %v", commitID, err)
return err
}
}
blob := file.Blob
dataRc, err := blob.Reader()
if err != nil {
log.Error("Unable to read blob with ID %q. Error: %v", blob.ID, err)
return err
}
defer dataRc.Close()
d, err := io.ReadAll(dataRc)
if err != nil {
log.Error("Unable to read blob with ID %q. Error: %v", blob.ID, err)
return err
}
note.Message = d
commitNodeIndex, commitGraphFile := repo.CommitNodeIndex()
if commitGraphFile != nil {
defer commitGraphFile.Close()
}
commitNode, err := commitNodeIndex.Get(notes.ID)
if err != nil {
return err
}
lastCommits, err := GetLastCommitForPaths(ctx, nil, commitNode, "", []string{path})
if err != nil {
log.Error("Unable to get the commit for the path %q. Error: %v", path, err)
return err
}
note.Commit = convertCommit(lastCommits[path])
return nil
}