package git import ( "bytes" "errors" "io" "os" "gopkg.in/src-d/go-git.v4/plumbing" "gopkg.in/src-d/go-git.v4/plumbing/filemode" "gopkg.in/src-d/go-git.v4/plumbing/format/gitignore" "gopkg.in/src-d/go-git.v4/plumbing/format/index" "gopkg.in/src-d/go-git.v4/plumbing/object" "gopkg.in/src-d/go-git.v4/utils/ioutil" "gopkg.in/src-d/go-git.v4/utils/merkletrie" "gopkg.in/src-d/go-git.v4/utils/merkletrie/filesystem" mindex "gopkg.in/src-d/go-git.v4/utils/merkletrie/index" "gopkg.in/src-d/go-git.v4/utils/merkletrie/noder" ) // ErrDestinationExists in an Move operation means that the target exists on // the worktree. var ErrDestinationExists = errors.New("destination exists") // Status returns the working tree status. func (w *Worktree) Status() (Status, error) { ref, err := w.r.Head() if err == plumbing.ErrReferenceNotFound { return make(Status, 0), nil } if err != nil { return nil, err } return w.status(ref.Hash()) } func (w *Worktree) status(commit plumbing.Hash) (Status, error) { s := make(Status, 0) left, err := w.diffCommitWithStaging(commit, false) if err != nil { return nil, err } for _, ch := range left { a, err := ch.Action() if err != nil { return nil, err } fs := s.File(nameFromAction(&ch)) fs.Worktree = Unmodified switch a { case merkletrie.Delete: s.File(ch.From.String()).Staging = Deleted case merkletrie.Insert: s.File(ch.To.String()).Staging = Added case merkletrie.Modify: s.File(ch.To.String()).Staging = Modified } } right, err := w.diffStagingWithWorktree() if err != nil { return nil, err } for _, ch := range right { a, err := ch.Action() if err != nil { return nil, err } fs := s.File(nameFromAction(&ch)) if fs.Staging == Untracked { fs.Staging = Unmodified } switch a { case merkletrie.Delete: fs.Worktree = Deleted case merkletrie.Insert: fs.Worktree = Untracked fs.Staging = Untracked case merkletrie.Modify: fs.Worktree = Modified } } return s, nil } func nameFromAction(ch *merkletrie.Change) string { name := ch.To.String() if name == "" { return ch.From.String() } return name } func (w *Worktree) diffStagingWithWorktree() (merkletrie.Changes, error) { idx, err := w.r.Storer.Index() if err != nil { return nil, err } from := mindex.NewRootNode(idx) submodules, err := w.getSubmodulesStatus() if err != nil { return nil, err } to := filesystem.NewRootNode(w.fs, submodules) res, err := merkletrie.DiffTree(from, to, diffTreeIsEquals) if err == nil { res = w.excludeIgnoredChanges(res) } return res, err } func (w *Worktree) excludeIgnoredChanges(changes merkletrie.Changes) merkletrie.Changes { patterns, err := gitignore.ReadPatterns(w.fs, nil) if err != nil || len(patterns) == 0 { return changes } m := gitignore.NewMatcher(patterns) var res merkletrie.Changes for _, ch := range changes { var path []string for _, n := range ch.To { path = append(path, n.Name()) } if len(path) == 0 { for _, n := range ch.From { path = append(path, n.Name()) } } if len(path) != 0 { isDir := (len(ch.To) > 0 && ch.To.IsDir()) || (len(ch.From) > 0 && ch.From.IsDir()) if m.Match(path, isDir) { continue } } res = append(res, ch) } return res } func (w *Worktree) getSubmodulesStatus() (map[string]plumbing.Hash, error) { o := map[string]plumbing.Hash{} sub, err := w.Submodules() if err != nil { return nil, err } status, err := sub.Status() if err != nil { return nil, err } for _, s := range status { if s.Current.IsZero() { o[s.Path] = s.Expected continue } o[s.Path] = s.Current } return o, nil } func (w *Worktree) diffCommitWithStaging(commit plumbing.Hash, reverse bool) (merkletrie.Changes, error) { idx, err := w.r.Storer.Index() if err != nil { return nil, err } c, err := w.r.CommitObject(commit) if err != nil { return nil, err } t, err := c.Tree() if err != nil { return nil, err } to := mindex.NewRootNode(idx) from := object.NewTreeRootNode(t) if reverse { return merkletrie.DiffTree(to, from, diffTreeIsEquals) } return merkletrie.DiffTree(from, to, diffTreeIsEquals) } var emptyNoderHash = make([]byte, 24) // diffTreeIsEquals is a implementation of noder.Equals, used to compare // noder.Noder, it compare the content and the length of the hashes. // // Since some of the noder.Noder implementations doesn't compute a hash for // some directories, if any of the hashes is a 24-byte slice of zero values // the comparison is not done and the hashes are take as different. func diffTreeIsEquals(a, b noder.Hasher) bool { hashA := a.Hash() hashB := b.Hash() if bytes.Equal(hashA, emptyNoderHash) || bytes.Equal(hashB, emptyNoderHash) { return false } return bytes.Equal(hashA, hashB) } // Add adds the file contents of a file in the worktree to the index. if the // file is already stagged in the index no error is returned. func (w *Worktree) Add(path string) (plumbing.Hash, error) { s, err := w.Status() if err != nil { return plumbing.ZeroHash, err } h, err := w.copyFileToStorage(path) if err != nil { return h, err } if s.File(path).Worktree == Unmodified { return h, nil } if err := w.addOrUpdateFileToIndex(path, h); err != nil { return h, err } return h, err } func (w *Worktree) copyFileToStorage(path string) (hash plumbing.Hash, err error) { fi, err := w.fs.Lstat(path) if err != nil { return plumbing.ZeroHash, err } obj := w.r.Storer.NewEncodedObject() obj.SetType(plumbing.BlobObject) obj.SetSize(fi.Size()) writer, err := obj.Writer() if err != nil { return plumbing.ZeroHash, err } defer ioutil.CheckClose(writer, &err) if fi.Mode()&os.ModeSymlink != 0 { err = w.fillEncodedObjectFromSymlink(writer, path, fi) } else { err = w.fillEncodedObjectFromFile(writer, path, fi) } if err != nil { return plumbing.ZeroHash, err } return w.r.Storer.SetEncodedObject(obj) } func (w *Worktree) fillEncodedObjectFromFile(dst io.Writer, path string, fi os.FileInfo) (err error) { src, err := w.fs.Open(path) if err != nil { return err } defer ioutil.CheckClose(src, &err) if _, err := io.Copy(dst, src); err != nil { return err } return err } func (w *Worktree) fillEncodedObjectFromSymlink(dst io.Writer, path string, fi os.FileInfo) error { target, err := w.fs.Readlink(path) if err != nil { return err } _, err = dst.Write([]byte(target)) return err } func (w *Worktree) addOrUpdateFileToIndex(filename string, h plumbing.Hash) error { idx, err := w.r.Storer.Index() if err != nil { return err } e, err := idx.Entry(filename) if err != nil && err != index.ErrEntryNotFound { return err } if err == index.ErrEntryNotFound { if err := w.doAddFileToIndex(idx, filename, h); err != nil { return err } } else { if err := w.doUpdateFileToIndex(e, filename, h); err != nil { return err } } return w.r.Storer.SetIndex(idx) } func (w *Worktree) doAddFileToIndex(idx *index.Index, filename string, h plumbing.Hash) error { e := &index.Entry{Name: filename} idx.Entries = append(idx.Entries, e) return w.doUpdateFileToIndex(e, filename, h) } func (w *Worktree) doUpdateFileToIndex(e *index.Entry, filename string, h plumbing.Hash) error { info, err := w.fs.Lstat(filename) if err != nil { return err } e.Hash = h e.ModifiedAt = info.ModTime() e.Mode, err = filemode.NewFromOSFileMode(info.Mode()) if err != nil { return err } if e.Mode.IsRegular() { e.Size = uint32(info.Size()) } fillSystemInfo(e, info.Sys()) return nil } // Remove removes files from the working tree and from the index. func (w *Worktree) Remove(path string) (plumbing.Hash, error) { hash, err := w.deleteFromIndex(path) if err != nil { return plumbing.ZeroHash, err } return hash, w.deleteFromFilesystem(path) } func (w *Worktree) deleteFromIndex(path string) (plumbing.Hash, error) { idx, err := w.r.Storer.Index() if err != nil { return plumbing.ZeroHash, err } e, err := idx.Remove(path) if err != nil { return plumbing.ZeroHash, err } return e.Hash, w.r.Storer.SetIndex(idx) } func (w *Worktree) deleteFromFilesystem(path string) error { err := w.fs.Remove(path) if os.IsNotExist(err) { return nil } return err } // Move moves or rename a file in the worktree and the index, directories are // not supported. func (w *Worktree) Move(from, to string) (plumbing.Hash, error) { if _, err := w.fs.Lstat(from); err != nil { return plumbing.ZeroHash, err } if _, err := w.fs.Lstat(to); err == nil { return plumbing.ZeroHash, ErrDestinationExists } hash, err := w.deleteFromIndex(from) if err != nil { return plumbing.ZeroHash, err } if err := w.fs.Rename(from, to); err != nil { return hash, err } return hash, w.addOrUpdateFileToIndex(to, hash) }