code.gitea.io/gitea@v1.19.3/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/object"
    15  )
    16  
    17  // GetNote retrieves the git-notes data for a given commit.
    18  // FIXME: Add LastCommitCache support
    19  func GetNote(ctx context.Context, repo *Repository, commitID string, note *Note) error {
    20  	log.Trace("Searching for git note corresponding to the commit %q in the repository %q", commitID, repo.Path)
    21  	notes, err := repo.GetCommit(NotesRef)
    22  	if err != nil {
    23  		if IsErrNotExist(err) {
    24  			return err
    25  		}
    26  		log.Error("Unable to get commit from ref %q. Error: %v", NotesRef, err)
    27  		return err
    28  	}
    29  
    30  	remainingCommitID := commitID
    31  	path := ""
    32  	currentTree := notes.Tree.gogitTree
    33  	log.Trace("Found tree with ID %q while searching for git note corresponding to the commit %q", currentTree.Entries[0].Name, commitID)
    34  	var file *object.File
    35  	for len(remainingCommitID) > 2 {
    36  		file, err = currentTree.File(remainingCommitID)
    37  		if err == nil {
    38  			path += remainingCommitID
    39  			break
    40  		}
    41  		if err == object.ErrFileNotFound {
    42  			currentTree, err = currentTree.Tree(remainingCommitID[0:2])
    43  			path += remainingCommitID[0:2] + "/"
    44  			remainingCommitID = remainingCommitID[2:]
    45  		}
    46  		if err != nil {
    47  			if err == object.ErrDirectoryNotFound {
    48  				return ErrNotExist{ID: remainingCommitID, RelPath: path}
    49  			}
    50  			log.Error("Unable to find git note corresponding to the commit %q. Error: %v", commitID, err)
    51  			return err
    52  		}
    53  	}
    54  
    55  	blob := file.Blob
    56  	dataRc, err := blob.Reader()
    57  	if err != nil {
    58  		log.Error("Unable to read blob with ID %q. Error: %v", blob.ID, err)
    59  		return err
    60  	}
    61  
    62  	defer dataRc.Close()
    63  	d, err := io.ReadAll(dataRc)
    64  	if err != nil {
    65  		log.Error("Unable to read blob with ID %q. Error: %v", blob.ID, err)
    66  		return err
    67  	}
    68  	note.Message = d
    69  
    70  	commitNodeIndex, commitGraphFile := repo.CommitNodeIndex()
    71  	if commitGraphFile != nil {
    72  		defer commitGraphFile.Close()
    73  	}
    74  
    75  	commitNode, err := commitNodeIndex.Get(notes.ID)
    76  	if err != nil {
    77  		return err
    78  	}
    79  
    80  	lastCommits, err := GetLastCommitForPaths(ctx, nil, commitNode, "", []string{path})
    81  	if err != nil {
    82  		log.Error("Unable to get the commit for the path %q. Error: %v", path, err)
    83  		return err
    84  	}
    85  	note.Commit = lastCommits[path]
    86  
    87  	return nil
    88  }