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// Copyright 2019 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package git
import (
"context"
"io"
"strings"
"code.gitea.io/gitea/modules/log"
)
// NotesRef is the git ref where Gitea will look for git-notes data.
// The value ("refs/notes/commits") is the default ref used by git-notes.
const NotesRef = "refs/notes/commits"
// Note stores information about a note created using git-notes.
type Note struct {
Message []byte
Commit *Commit
}
// 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 {
if IsErrNotExist(err) {
return err
}
log.Error("Unable to get commit from ref %q. Error: %v", NotesRef, err)
return err
}
path := ""
tree := ¬es.Tree
log.Trace("Found tree with ID %q while searching for git note corresponding to the commit %q", tree.ID, commitID)
var entry *TreeEntry
originalCommitID := commitID
for len(commitID) > 2 {
entry, err = tree.GetTreeEntryByPath(commitID)
if err == nil {
path += commitID
break
}
if IsErrNotExist(err) {
tree, err = tree.SubTree(commitID[0:2])
path += commitID[0:2] + "/"
commitID = commitID[2:]
}
if err != nil {
// Err may have been updated by the SubTree we need to recheck if it's again an ErrNotExist
if !IsErrNotExist(err) {
log.Error("Unable to find git note corresponding to the commit %q. Error: %v", originalCommitID, err)
}
return err
}
}
blob := entry.Blob()
dataRc, err := blob.DataAsync()
if err != nil {
log.Error("Unable to read blob with ID %q. Error: %v", blob.ID, err)
return err
}
closed := false
defer func() {
if !closed {
_ = 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
}
_ = dataRc.Close()
closed = true
note.Message = d
treePath := ""
if idx := strings.LastIndex(path, "/"); idx > -1 {
treePath = path[:idx]
path = path[idx+1:]
}
lastCommits, err := GetLastCommitForPaths(ctx, notes, treePath, []string{path})
if err != nil {
log.Error("Unable to get the commit for the path %q. Error: %v", treePath, err)
return err
}
note.Commit = lastCommits[path]
return nil
}
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