code.gitea.io/gitea@v1.22.3/modules/git/notes_gogit.go (about)

     1  // Copyright 2019 The Gitea Authors. All rights reserved.
     2  // SPDX-License-Identifier: MIT
     3  
     4  //go:build gogit
     5  
     6  package git
     7  
     8  import (
     9  	"context"
    10  	"io"
    11  
    12  	"code.gitea.io/gitea/modules/log"
    13  
    14  	"github.com/go-git/go-git/v5/plumbing"
    15  	"github.com/go-git/go-git/v5/plumbing/object"
    16  )
    17  
    18  // GetNote retrieves the git-notes data for a given commit.
    19  // FIXME: Add LastCommitCache support
    20  func GetNote(ctx context.Context, repo *Repository, commitID string, note *Note) error {
    21  	log.Trace("Searching for git note corresponding to the commit %q in the repository %q", commitID, repo.Path)
    22  	notes, err := repo.GetCommit(NotesRef)
    23  	if err != nil {
    24  		if IsErrNotExist(err) {
    25  			return err
    26  		}
    27  		log.Error("Unable to get commit from ref %q. Error: %v", NotesRef, err)
    28  		return err
    29  	}
    30  
    31  	remainingCommitID := commitID
    32  	path := ""
    33  	currentTree := notes.Tree.gogitTree
    34  	log.Trace("Found tree with ID %q while searching for git note corresponding to the commit %q", currentTree.Entries[0].Name, commitID)
    35  	var file *object.File
    36  	for len(remainingCommitID) > 2 {
    37  		file, err = currentTree.File(remainingCommitID)
    38  		if err == nil {
    39  			path += remainingCommitID
    40  			break
    41  		}
    42  		if err == object.ErrFileNotFound {
    43  			currentTree, err = currentTree.Tree(remainingCommitID[0:2])
    44  			path += remainingCommitID[0:2] + "/"
    45  			remainingCommitID = remainingCommitID[2:]
    46  		}
    47  		if err != nil {
    48  			if err == object.ErrDirectoryNotFound {
    49  				return ErrNotExist{ID: remainingCommitID, RelPath: path}
    50  			}
    51  			log.Error("Unable to find git note corresponding to the commit %q. Error: %v", commitID, err)
    52  			return err
    53  		}
    54  	}
    55  
    56  	blob := file.Blob
    57  	dataRc, err := blob.Reader()
    58  	if err != nil {
    59  		log.Error("Unable to read blob with ID %q. Error: %v", blob.ID, err)
    60  		return err
    61  	}
    62  
    63  	defer dataRc.Close()
    64  	d, err := io.ReadAll(dataRc)
    65  	if err != nil {
    66  		log.Error("Unable to read blob with ID %q. Error: %v", blob.ID, err)
    67  		return err
    68  	}
    69  	note.Message = d
    70  
    71  	commitNodeIndex, commitGraphFile := repo.CommitNodeIndex()
    72  	if commitGraphFile != nil {
    73  		defer commitGraphFile.Close()
    74  	}
    75  
    76  	commitNode, err := commitNodeIndex.Get(plumbing.Hash(notes.ID.RawValue()))
    77  	if err != nil {
    78  		return err
    79  	}
    80  
    81  	lastCommits, err := GetLastCommitForPaths(ctx, nil, commitNode, "", []string{path})
    82  	if err != nil {
    83  		log.Error("Unable to get the commit for the path %q. Error: %v", path, err)
    84  		return err
    85  	}
    86  	note.Commit = lastCommits[path]
    87  
    88  	return nil
    89  }