mirror of
https://github.com/go-gitea/gitea.git
synced 2024-08-27 22:57:28 +02:00
657 lines
14 KiB
Go
657 lines
14 KiB
Go
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package git
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import (
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"bytes"
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"errors"
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"io"
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"os"
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"path"
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"path/filepath"
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"gopkg.in/src-d/go-billy.v4/util"
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"gopkg.in/src-d/go-git.v4/plumbing"
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"gopkg.in/src-d/go-git.v4/plumbing/filemode"
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"gopkg.in/src-d/go-git.v4/plumbing/format/gitignore"
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"gopkg.in/src-d/go-git.v4/plumbing/format/index"
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"gopkg.in/src-d/go-git.v4/plumbing/object"
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"gopkg.in/src-d/go-git.v4/utils/ioutil"
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"gopkg.in/src-d/go-git.v4/utils/merkletrie"
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"gopkg.in/src-d/go-git.v4/utils/merkletrie/filesystem"
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mindex "gopkg.in/src-d/go-git.v4/utils/merkletrie/index"
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"gopkg.in/src-d/go-git.v4/utils/merkletrie/noder"
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)
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var (
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// ErrDestinationExists in an Move operation means that the target exists on
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// the worktree.
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ErrDestinationExists = errors.New("destination exists")
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// ErrGlobNoMatches in an AddGlob if the glob pattern does not match any
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// files in the worktree.
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ErrGlobNoMatches = errors.New("glob pattern did not match any files")
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)
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// Status returns the working tree status.
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func (w *Worktree) Status() (Status, error) {
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var hash plumbing.Hash
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ref, err := w.r.Head()
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if err != nil && err != plumbing.ErrReferenceNotFound {
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return nil, err
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}
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if err == nil {
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hash = ref.Hash()
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}
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return w.status(hash)
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}
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func (w *Worktree) status(commit plumbing.Hash) (Status, error) {
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s := make(Status)
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left, err := w.diffCommitWithStaging(commit, false)
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if err != nil {
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return nil, err
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}
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for _, ch := range left {
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a, err := ch.Action()
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if err != nil {
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return nil, err
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}
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fs := s.File(nameFromAction(&ch))
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fs.Worktree = Unmodified
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switch a {
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case merkletrie.Delete:
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s.File(ch.From.String()).Staging = Deleted
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case merkletrie.Insert:
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s.File(ch.To.String()).Staging = Added
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case merkletrie.Modify:
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s.File(ch.To.String()).Staging = Modified
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}
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}
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right, err := w.diffStagingWithWorktree(false)
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if err != nil {
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return nil, err
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}
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for _, ch := range right {
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a, err := ch.Action()
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if err != nil {
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return nil, err
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}
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fs := s.File(nameFromAction(&ch))
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if fs.Staging == Untracked {
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fs.Staging = Unmodified
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}
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switch a {
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case merkletrie.Delete:
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fs.Worktree = Deleted
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case merkletrie.Insert:
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fs.Worktree = Untracked
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fs.Staging = Untracked
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case merkletrie.Modify:
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fs.Worktree = Modified
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}
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}
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return s, nil
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}
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func nameFromAction(ch *merkletrie.Change) string {
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name := ch.To.String()
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if name == "" {
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return ch.From.String()
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}
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return name
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}
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func (w *Worktree) diffStagingWithWorktree(reverse bool) (merkletrie.Changes, error) {
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idx, err := w.r.Storer.Index()
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if err != nil {
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return nil, err
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}
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from := mindex.NewRootNode(idx)
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submodules, err := w.getSubmodulesStatus()
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if err != nil {
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return nil, err
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}
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to := filesystem.NewRootNode(w.Filesystem, submodules)
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var c merkletrie.Changes
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if reverse {
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c, err = merkletrie.DiffTree(to, from, diffTreeIsEquals)
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} else {
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c, err = merkletrie.DiffTree(from, to, diffTreeIsEquals)
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}
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if err != nil {
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return nil, err
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}
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return w.excludeIgnoredChanges(c), nil
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}
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func (w *Worktree) excludeIgnoredChanges(changes merkletrie.Changes) merkletrie.Changes {
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patterns, err := gitignore.ReadPatterns(w.Filesystem, nil)
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if err != nil || len(patterns) == 0 {
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return changes
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}
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patterns = append(patterns, w.Excludes...)
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m := gitignore.NewMatcher(patterns)
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var res merkletrie.Changes
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for _, ch := range changes {
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var path []string
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for _, n := range ch.To {
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path = append(path, n.Name())
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}
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if len(path) == 0 {
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for _, n := range ch.From {
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path = append(path, n.Name())
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}
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}
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if len(path) != 0 {
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isDir := (len(ch.To) > 0 && ch.To.IsDir()) || (len(ch.From) > 0 && ch.From.IsDir())
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if m.Match(path, isDir) {
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continue
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}
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}
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res = append(res, ch)
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}
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return res
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}
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func (w *Worktree) getSubmodulesStatus() (map[string]plumbing.Hash, error) {
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o := map[string]plumbing.Hash{}
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sub, err := w.Submodules()
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if err != nil {
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return nil, err
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}
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status, err := sub.Status()
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if err != nil {
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return nil, err
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}
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for _, s := range status {
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if s.Current.IsZero() {
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o[s.Path] = s.Expected
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continue
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}
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o[s.Path] = s.Current
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}
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return o, nil
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}
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func (w *Worktree) diffCommitWithStaging(commit plumbing.Hash, reverse bool) (merkletrie.Changes, error) {
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var t *object.Tree
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if !commit.IsZero() {
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c, err := w.r.CommitObject(commit)
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if err != nil {
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return nil, err
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}
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t, err = c.Tree()
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if err != nil {
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return nil, err
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}
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}
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return w.diffTreeWithStaging(t, reverse)
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}
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func (w *Worktree) diffTreeWithStaging(t *object.Tree, reverse bool) (merkletrie.Changes, error) {
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var from noder.Noder
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if t != nil {
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from = object.NewTreeRootNode(t)
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}
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idx, err := w.r.Storer.Index()
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if err != nil {
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return nil, err
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}
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to := mindex.NewRootNode(idx)
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if reverse {
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return merkletrie.DiffTree(to, from, diffTreeIsEquals)
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}
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return merkletrie.DiffTree(from, to, diffTreeIsEquals)
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}
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var emptyNoderHash = make([]byte, 24)
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// diffTreeIsEquals is a implementation of noder.Equals, used to compare
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// noder.Noder, it compare the content and the length of the hashes.
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//
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// Since some of the noder.Noder implementations doesn't compute a hash for
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// some directories, if any of the hashes is a 24-byte slice of zero values
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// the comparison is not done and the hashes are take as different.
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func diffTreeIsEquals(a, b noder.Hasher) bool {
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hashA := a.Hash()
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hashB := b.Hash()
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if bytes.Equal(hashA, emptyNoderHash) || bytes.Equal(hashB, emptyNoderHash) {
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return false
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}
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return bytes.Equal(hashA, hashB)
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}
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// Add adds the file contents of a file in the worktree to the index. if the
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// file is already staged in the index no error is returned. If a file deleted
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// from the Workspace is given, the file is removed from the index. If a
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// directory given, adds the files and all his sub-directories recursively in
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// the worktree to the index. If any of the files is already staged in the index
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// no error is returned. When path is a file, the blob.Hash is returned.
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func (w *Worktree) Add(path string) (plumbing.Hash, error) {
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// TODO(mcuadros): remove plumbing.Hash from signature at v5.
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s, err := w.Status()
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if err != nil {
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return plumbing.ZeroHash, err
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}
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idx, err := w.r.Storer.Index()
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if err != nil {
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return plumbing.ZeroHash, err
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}
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var h plumbing.Hash
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var added bool
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fi, err := w.Filesystem.Lstat(path)
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if err != nil || !fi.IsDir() {
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added, h, err = w.doAddFile(idx, s, path)
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} else {
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added, err = w.doAddDirectory(idx, s, path)
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}
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if err != nil {
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return h, err
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}
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if !added {
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return h, nil
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}
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return h, w.r.Storer.SetIndex(idx)
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}
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func (w *Worktree) doAddDirectory(idx *index.Index, s Status, directory string) (added bool, err error) {
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files, err := w.Filesystem.ReadDir(directory)
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if err != nil {
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return false, err
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}
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for _, file := range files {
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name := path.Join(directory, file.Name())
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var a bool
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if file.IsDir() {
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if file.Name() == GitDirName {
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// ignore special git directory
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continue
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}
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a, err = w.doAddDirectory(idx, s, name)
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} else {
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a, _, err = w.doAddFile(idx, s, name)
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}
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if err != nil {
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return
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}
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if !added && a {
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added = true
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}
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}
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return
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}
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// AddGlob adds all paths, matching pattern, to the index. If pattern matches a
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// directory path, all directory contents are added to the index recursively. No
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// error is returned if all matching paths are already staged in index.
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func (w *Worktree) AddGlob(pattern string) error {
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files, err := util.Glob(w.Filesystem, pattern)
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if err != nil {
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return err
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}
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if len(files) == 0 {
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return ErrGlobNoMatches
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}
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s, err := w.Status()
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if err != nil {
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return err
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}
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idx, err := w.r.Storer.Index()
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if err != nil {
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return err
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}
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var saveIndex bool
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for _, file := range files {
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fi, err := w.Filesystem.Lstat(file)
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if err != nil {
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return err
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}
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var added bool
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if fi.IsDir() {
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added, err = w.doAddDirectory(idx, s, file)
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} else {
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added, _, err = w.doAddFile(idx, s, file)
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}
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if err != nil {
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return err
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}
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if !saveIndex && added {
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saveIndex = true
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}
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}
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if saveIndex {
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return w.r.Storer.SetIndex(idx)
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}
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return nil
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}
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// doAddFile create a new blob from path and update the index, added is true if
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// the file added is different from the index.
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func (w *Worktree) doAddFile(idx *index.Index, s Status, path string) (added bool, h plumbing.Hash, err error) {
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if s.File(path).Worktree == Unmodified {
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return false, h, nil
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}
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h, err = w.copyFileToStorage(path)
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if err != nil {
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if os.IsNotExist(err) {
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added = true
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h, err = w.deleteFromIndex(idx, path)
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}
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return
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}
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if err := w.addOrUpdateFileToIndex(idx, path, h); err != nil {
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return false, h, err
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}
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return true, h, err
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}
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func (w *Worktree) copyFileToStorage(path string) (hash plumbing.Hash, err error) {
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fi, err := w.Filesystem.Lstat(path)
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if err != nil {
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return plumbing.ZeroHash, err
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}
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obj := w.r.Storer.NewEncodedObject()
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obj.SetType(plumbing.BlobObject)
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obj.SetSize(fi.Size())
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writer, err := obj.Writer()
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if err != nil {
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return plumbing.ZeroHash, err
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}
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defer ioutil.CheckClose(writer, &err)
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if fi.Mode()&os.ModeSymlink != 0 {
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err = w.fillEncodedObjectFromSymlink(writer, path, fi)
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} else {
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err = w.fillEncodedObjectFromFile(writer, path, fi)
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}
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if err != nil {
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return plumbing.ZeroHash, err
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}
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return w.r.Storer.SetEncodedObject(obj)
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}
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func (w *Worktree) fillEncodedObjectFromFile(dst io.Writer, path string, fi os.FileInfo) (err error) {
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src, err := w.Filesystem.Open(path)
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if err != nil {
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return err
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}
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defer ioutil.CheckClose(src, &err)
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if _, err := io.Copy(dst, src); err != nil {
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return err
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}
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return err
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}
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func (w *Worktree) fillEncodedObjectFromSymlink(dst io.Writer, path string, fi os.FileInfo) error {
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target, err := w.Filesystem.Readlink(path)
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if err != nil {
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return err
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}
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_, err = dst.Write([]byte(target))
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return err
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}
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func (w *Worktree) addOrUpdateFileToIndex(idx *index.Index, filename string, h plumbing.Hash) error {
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e, err := idx.Entry(filename)
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if err != nil && err != index.ErrEntryNotFound {
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return err
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}
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if err == index.ErrEntryNotFound {
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return w.doAddFileToIndex(idx, filename, h)
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}
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return w.doUpdateFileToIndex(e, filename, h)
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}
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|
func (w *Worktree) doAddFileToIndex(idx *index.Index, filename string, h plumbing.Hash) error {
|
||
|
return w.doUpdateFileToIndex(idx.Add(filename), filename, h)
|
||
|
}
|
||
|
|
||
|
func (w *Worktree) doUpdateFileToIndex(e *index.Entry, filename string, h plumbing.Hash) error {
|
||
|
info, err := w.Filesystem.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) {
|
||
|
// TODO(mcuadros): remove plumbing.Hash from signature at v5.
|
||
|
idx, err := w.r.Storer.Index()
|
||
|
if err != nil {
|
||
|
return plumbing.ZeroHash, err
|
||
|
}
|
||
|
|
||
|
var h plumbing.Hash
|
||
|
|
||
|
fi, err := w.Filesystem.Lstat(path)
|
||
|
if err != nil || !fi.IsDir() {
|
||
|
h, err = w.doRemoveFile(idx, path)
|
||
|
} else {
|
||
|
_, err = w.doRemoveDirectory(idx, path)
|
||
|
}
|
||
|
if err != nil {
|
||
|
return h, err
|
||
|
}
|
||
|
|
||
|
return h, w.r.Storer.SetIndex(idx)
|
||
|
}
|
||
|
|
||
|
func (w *Worktree) doRemoveDirectory(idx *index.Index, directory string) (removed bool, err error) {
|
||
|
files, err := w.Filesystem.ReadDir(directory)
|
||
|
if err != nil {
|
||
|
return false, err
|
||
|
}
|
||
|
|
||
|
for _, file := range files {
|
||
|
name := path.Join(directory, file.Name())
|
||
|
|
||
|
var r bool
|
||
|
if file.IsDir() {
|
||
|
r, err = w.doRemoveDirectory(idx, name)
|
||
|
} else {
|
||
|
_, err = w.doRemoveFile(idx, name)
|
||
|
if err == index.ErrEntryNotFound {
|
||
|
err = nil
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if err != nil {
|
||
|
return
|
||
|
}
|
||
|
|
||
|
if !removed && r {
|
||
|
removed = true
|
||
|
}
|
||
|
}
|
||
|
|
||
|
err = w.removeEmptyDirectory(directory)
|
||
|
return
|
||
|
}
|
||
|
|
||
|
func (w *Worktree) removeEmptyDirectory(path string) error {
|
||
|
files, err := w.Filesystem.ReadDir(path)
|
||
|
if err != nil {
|
||
|
return err
|
||
|
}
|
||
|
|
||
|
if len(files) != 0 {
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
return w.Filesystem.Remove(path)
|
||
|
}
|
||
|
|
||
|
func (w *Worktree) doRemoveFile(idx *index.Index, path string) (plumbing.Hash, error) {
|
||
|
hash, err := w.deleteFromIndex(idx, path)
|
||
|
if err != nil {
|
||
|
return plumbing.ZeroHash, err
|
||
|
}
|
||
|
|
||
|
return hash, w.deleteFromFilesystem(path)
|
||
|
}
|
||
|
|
||
|
func (w *Worktree) deleteFromIndex(idx *index.Index, path string) (plumbing.Hash, error) {
|
||
|
e, err := idx.Remove(path)
|
||
|
if err != nil {
|
||
|
return plumbing.ZeroHash, err
|
||
|
}
|
||
|
|
||
|
return e.Hash, nil
|
||
|
}
|
||
|
|
||
|
func (w *Worktree) deleteFromFilesystem(path string) error {
|
||
|
err := w.Filesystem.Remove(path)
|
||
|
if os.IsNotExist(err) {
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
return err
|
||
|
}
|
||
|
|
||
|
// RemoveGlob removes all paths, matching pattern, from the index. If pattern
|
||
|
// matches a directory path, all directory contents are removed from the index
|
||
|
// recursively.
|
||
|
func (w *Worktree) RemoveGlob(pattern string) error {
|
||
|
idx, err := w.r.Storer.Index()
|
||
|
if err != nil {
|
||
|
return err
|
||
|
}
|
||
|
|
||
|
entries, err := idx.Glob(pattern)
|
||
|
if err != nil {
|
||
|
return err
|
||
|
}
|
||
|
|
||
|
for _, e := range entries {
|
||
|
file := filepath.FromSlash(e.Name)
|
||
|
if _, err := w.Filesystem.Lstat(file); err != nil && !os.IsNotExist(err) {
|
||
|
return err
|
||
|
}
|
||
|
|
||
|
if _, err := w.doRemoveFile(idx, file); err != nil {
|
||
|
return err
|
||
|
}
|
||
|
|
||
|
dir, _ := filepath.Split(file)
|
||
|
if err := w.removeEmptyDirectory(dir); err != nil {
|
||
|
return err
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return w.r.Storer.SetIndex(idx)
|
||
|
}
|
||
|
|
||
|
// 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) {
|
||
|
// TODO(mcuadros): support directories and/or implement support for glob
|
||
|
if _, err := w.Filesystem.Lstat(from); err != nil {
|
||
|
return plumbing.ZeroHash, err
|
||
|
}
|
||
|
|
||
|
if _, err := w.Filesystem.Lstat(to); err == nil {
|
||
|
return plumbing.ZeroHash, ErrDestinationExists
|
||
|
}
|
||
|
|
||
|
idx, err := w.r.Storer.Index()
|
||
|
if err != nil {
|
||
|
return plumbing.ZeroHash, err
|
||
|
}
|
||
|
|
||
|
hash, err := w.deleteFromIndex(idx, from)
|
||
|
if err != nil {
|
||
|
return plumbing.ZeroHash, err
|
||
|
}
|
||
|
|
||
|
if err := w.Filesystem.Rename(from, to); err != nil {
|
||
|
return hash, err
|
||
|
}
|
||
|
|
||
|
if err := w.addOrUpdateFileToIndex(idx, to, hash); err != nil {
|
||
|
return hash, err
|
||
|
}
|
||
|
|
||
|
return hash, w.r.Storer.SetIndex(idx)
|
||
|
}
|