Merge branch 'master' into codecommit-ref-delta

21 files changed, 99 insertions, 86 deletions

diff --git a/plumbing/format/commitgraph/file.go b/plumbing/format/commitgraph/file.go
index 0ce7198..1d25238 100644
--- a/plumbing/format/commitgraph/file.go
+++ b/plumbing/format/commitgraph/file.go
@@ -14,14 +14,14 @@ import (
 var (

 	// ErrUnsupportedVersion is returned by OpenFileIndex when the commit graph

 	// file version is not supported.

-	ErrUnsupportedVersion = errors.New("Unsupported version")

+	ErrUnsupportedVersion = errors.New("unsupported version")

 	// ErrUnsupportedHash is returned by OpenFileIndex when the commit graph

 	// hash function is not supported. Currently only SHA-1 is defined and

 	// supported

-	ErrUnsupportedHash = errors.New("Unsupported hash algorithm")

+	ErrUnsupportedHash = errors.New("unsupported hash algorithm")

 	// ErrMalformedCommitGraphFile is returned by OpenFileIndex when the commit

 	// graph file is corrupted.

-	ErrMalformedCommitGraphFile = errors.New("Malformed commit graph file")

+	ErrMalformedCommitGraphFile = errors.New("malformed commit graph file")

 

 	commitFileSignature    = []byte{'C', 'G', 'P', 'H'}

 	oidFanoutSignature     = []byte{'O', 'I', 'D', 'F'}

diff --git a/plumbing/format/gitattributes/attributes.go b/plumbing/format/gitattributes/attributes.go
index d13c2a9..329e667 100644
--- a/plumbing/format/gitattributes/attributes.go
+++ b/plumbing/format/gitattributes/attributes.go
@@ -15,7 +15,7 @@ const (
 
 var (
 	ErrMacroNotAllowed      = errors.New("macro not allowed")
-	ErrInvalidAttributeName = errors.New("Invalid attribute name")
+	ErrInvalidAttributeName = errors.New("invalid attribute name")
 )
 
 type MatchAttribute struct {
diff --git a/plumbing/format/idxfile/decoder.go b/plumbing/format/idxfile/decoder.go
index 7768bd6..51a3904 100644
--- a/plumbing/format/idxfile/decoder.go
+++ b/plumbing/format/idxfile/decoder.go
@@ -12,9 +12,9 @@ import (
 var (
 	// ErrUnsupportedVersion is returned by Decode when the idx file version
 	// is not supported.
-	ErrUnsupportedVersion = errors.New("Unsupported version")
+	ErrUnsupportedVersion = errors.New("unsupported version")
 	// ErrMalformedIdxFile is returned by Decode when the idx file is corrupted.
-	ErrMalformedIdxFile = errors.New("Malformed IDX file")
+	ErrMalformedIdxFile = errors.New("malformed IDX file")
 )
 
 const (
diff --git a/plumbing/format/index/encoder.go b/plumbing/format/index/encoder.go
index 00d4e7a..2c94d93 100644
--- a/plumbing/format/index/encoder.go
+++ b/plumbing/format/index/encoder.go
@@ -14,7 +14,7 @@ import (
 
 var (
 	// EncodeVersionSupported is the range of supported index versions
-	EncodeVersionSupported uint32 = 2
+	EncodeVersionSupported uint32 = 3
 
 	// ErrInvalidTimestamp is returned by Encode if a Index with a Entry with
 	// negative timestamp values
@@ -36,9 +36,9 @@ func NewEncoder(w io.Writer) *Encoder {
 
 // Encode writes the Index to the stream of the encoder.
 func (e *Encoder) Encode(idx *Index) error {
-	// TODO: support versions v3 and v4
+	// TODO: support v4
 	// TODO: support extensions
-	if idx.Version != EncodeVersionSupported {
+	if idx.Version > EncodeVersionSupported {
 		return ErrUnsupportedVersion
 	}
 
@@ -68,8 +68,12 @@ func (e *Encoder) encodeEntries(idx *Index) error {
 		if err := e.encodeEntry(entry); err != nil {
 			return err
 		}
+		entryLength := entryHeaderLength
+		if entry.IntentToAdd || entry.SkipWorktree {
+			entryLength += 2
+		}
 
-		wrote := entryHeaderLength + len(entry.Name)
+		wrote := entryLength + len(entry.Name)
 		if err := e.padEntry(wrote); err != nil {
 			return err
 		}
@@ -79,10 +83,6 @@ func (e *Encoder) encodeEntries(idx *Index) error {
 }
 
 func (e *Encoder) encodeEntry(entry *Entry) error {
-	if entry.IntentToAdd || entry.SkipWorktree {
-		return ErrUnsupportedVersion
-	}
-
 	sec, nsec, err := e.timeToUint32(&entry.CreatedAt)
 	if err != nil {
 		return err
@@ -110,9 +110,25 @@ func (e *Encoder) encodeEntry(entry *Entry) error {
 		entry.GID,
 		entry.Size,
 		entry.Hash[:],
-		flags,
 	}
 
+	flagsFlow := []interface{}{flags}
+
+	if entry.IntentToAdd || entry.SkipWorktree {
+		var extendedFlags uint16
+
+		if entry.IntentToAdd {
+			extendedFlags |= intentToAddMask
+		}
+		if entry.SkipWorktree {
+			extendedFlags |= skipWorkTreeMask
+		}
+
+		flagsFlow = []interface{}{flags | entryExtended, extendedFlags}
+	}
+
+	flow = append(flow, flagsFlow...)
+
 	if err := binary.Write(e.w, flow...); err != nil {
 		return err
 	}
diff --git a/plumbing/format/index/encoder_test.go b/plumbing/format/index/encoder_test.go
index b7a73cb..25c24f1 100644
--- a/plumbing/format/index/encoder_test.go
+++ b/plumbing/format/index/encoder_test.go
@@ -57,7 +57,7 @@ func (s *IndexSuite) TestEncode(c *C) {
 }
 
 func (s *IndexSuite) TestEncodeUnsupportedVersion(c *C) {
-	idx := &Index{Version: 3}
+	idx := &Index{Version: 4}
 
 	buf := bytes.NewBuffer(nil)
 	e := NewEncoder(buf)
@@ -67,24 +67,40 @@ func (s *IndexSuite) TestEncodeUnsupportedVersion(c *C) {
 
 func (s *IndexSuite) TestEncodeWithIntentToAddUnsupportedVersion(c *C) {
 	idx := &Index{
-		Version: 2,
+		Version: 3,
 		Entries: []*Entry{{IntentToAdd: true}},
 	}
 
 	buf := bytes.NewBuffer(nil)
 	e := NewEncoder(buf)
 	err := e.Encode(idx)
-	c.Assert(err, Equals, ErrUnsupportedVersion)
+	c.Assert(err, IsNil)
+
+	output := &Index{}
+	d := NewDecoder(buf)
+	err = d.Decode(output)
+	c.Assert(err, IsNil)
+
+	c.Assert(cmp.Equal(idx, output), Equals, true)
+	c.Assert(output.Entries[0].IntentToAdd, Equals, true)
 }
 
 func (s *IndexSuite) TestEncodeWithSkipWorktreeUnsupportedVersion(c *C) {
 	idx := &Index{
-		Version: 2,
+		Version: 3,
 		Entries: []*Entry{{SkipWorktree: true}},
 	}
 
 	buf := bytes.NewBuffer(nil)
 	e := NewEncoder(buf)
 	err := e.Encode(idx)
-	c.Assert(err, Equals, ErrUnsupportedVersion)
+	c.Assert(err, IsNil)
+
+	output := &Index{}
+	d := NewDecoder(buf)
+	err = d.Decode(output)
+	c.Assert(err, IsNil)
+
+	c.Assert(cmp.Equal(idx, output), Equals, true)
+	c.Assert(output.Entries[0].SkipWorktree, Equals, true)
 }
diff --git a/plumbing/format/index/index.go b/plumbing/format/index/index.go
index 649416a..f4c7647 100644
--- a/plumbing/format/index/index.go
+++ b/plumbing/format/index/index.go
@@ -5,6 +5,7 @@ import (
 	"errors"
 	"fmt"
 	"path/filepath"
+	"strings"
 	"time"
 
 	"github.com/go-git/go-git/v5/plumbing"
@@ -211,3 +212,20 @@ type EndOfIndexEntry struct {
 	//	their contents).
 	Hash plumbing.Hash
 }
+
+// SkipUnless applies patterns in the form of A, A/B, A/B/C
+// to the index to prevent the files from being checked out
+func (i *Index) SkipUnless(patterns []string) {
+	for _, e := range i.Entries {
+		var include bool
+		for _, pattern := range patterns {
+			if strings.HasPrefix(e.Name, pattern) {
+				include = true
+				break
+			}
+		}
+		if !include {
+			e.SkipWorktree = true
+		}
+	}
+}
diff --git a/plumbing/format/packfile/fsobject.go b/plumbing/format/packfile/fsobject.go
index a395d17..238339d 100644
--- a/plumbing/format/packfile/fsobject.go
+++ b/plumbing/format/packfile/fsobject.go
@@ -13,7 +13,6 @@ import (
 // FSObject is an object from the packfile on the filesystem.
 type FSObject struct {
 	hash                 plumbing.Hash
-	h                    *ObjectHeader
 	offset               int64
 	size                 int64
 	typ                  plumbing.ObjectType
@@ -118,17 +117,3 @@ func (o *FSObject) Type() plumbing.ObjectType {
 func (o *FSObject) Writer() (io.WriteCloser, error) {
 	return nil, nil
 }
-
-type objectReader struct {
-	io.ReadCloser
-	f billy.File
-}
-
-func (r *objectReader) Close() error {
-	if err := r.ReadCloser.Close(); err != nil {
-		_ = r.f.Close()
-		return err
-	}
-
-	return r.f.Close()
-}
diff --git a/plumbing/format/packfile/packfile_test.go b/plumbing/format/packfile/packfile_test.go
index 6af8817..2eb099d 100644
--- a/plumbing/format/packfile/packfile_test.go
+++ b/plumbing/format/packfile/packfile_test.go
@@ -8,7 +8,6 @@ import (
 	"github.com/go-git/go-git/v5/plumbing"
 	"github.com/go-git/go-git/v5/plumbing/format/idxfile"
 	"github.com/go-git/go-git/v5/plumbing/format/packfile"
-	"github.com/go-git/go-git/v5/plumbing/storer"
 	. "gopkg.in/check.v1"
 )
 
@@ -236,22 +235,6 @@ var expectedHashes = []string{
 	"7e59600739c96546163833214c36459e324bad0a",
 }
 
-func assertObjects(c *C, s storer.EncodedObjectStorer, expects []string) {
-	i, err := s.IterEncodedObjects(plumbing.AnyObject)
-	c.Assert(err, IsNil)
-
-	var count int
-	err = i.ForEach(func(plumbing.EncodedObject) error { count++; return nil })
-	c.Assert(err, IsNil)
-	c.Assert(count, Equals, len(expects))
-
-	for _, exp := range expects {
-		obt, err := s.EncodedObject(plumbing.AnyObject, plumbing.NewHash(exp))
-		c.Assert(err, IsNil)
-		c.Assert(obt.Hash().String(), Equals, exp)
-	}
-}
-
 func getIndexFromIdxFile(r io.Reader) idxfile.Index {
 	idx := idxfile.NewMemoryIndex()
 	if err := idxfile.NewDecoder(r).Decode(idx); err != nil {
diff --git a/plumbing/format/packfile/parser.go b/plumbing/format/packfile/parser.go
index 4c28a4a..9ec838e 100644
--- a/plumbing/format/packfile/parser.go
+++ b/plumbing/format/packfile/parser.go
@@ -46,7 +46,6 @@ type Parser struct {
 	oi         []*objectInfo
 	oiByHash   map[plumbing.Hash]*objectInfo
 	oiByOffset map[int64]*objectInfo
-	hashOffset map[plumbing.Hash]int64
 	checksum   plumbing.Hash
 
 	cache *cache.BufferLRU
diff --git a/plumbing/object/change_adaptor.go b/plumbing/object/change_adaptor.go
index f701188..b96ee84 100644
--- a/plumbing/object/change_adaptor.go
+++ b/plumbing/object/change_adaptor.go
@@ -16,11 +16,11 @@ func newChange(c merkletrie.Change) (*Change, error) {
 
 	var err error
 	if ret.From, err = newChangeEntry(c.From); err != nil {
-		return nil, fmt.Errorf("From field: %s", err)
+		return nil, fmt.Errorf("from field: %s", err)
 	}
 
 	if ret.To, err = newChangeEntry(c.To); err != nil {
-		return nil, fmt.Errorf("To field: %s", err)
+		return nil, fmt.Errorf("to field: %s", err)
 	}
 
 	return ret, nil
diff --git a/plumbing/object/patch.go b/plumbing/object/patch.go
index 56b62c1..06bc35b 100644
--- a/plumbing/object/patch.go
+++ b/plumbing/object/patch.go
@@ -96,10 +96,6 @@ func filePatchWithContext(ctx context.Context, c *Change) (fdiff.FilePatch, erro
 
 }
 
-func filePatch(c *Change) (fdiff.FilePatch, error) {
-	return filePatchWithContext(context.Background(), c)
-}
-
 func fileContent(f *File) (content string, isBinary bool, err error) {
 	if f == nil {
 		return
diff --git a/plumbing/object/treenoder.go b/plumbing/object/treenoder.go
index b4891b9..6e7b334 100644
--- a/plumbing/object/treenoder.go
+++ b/plumbing/object/treenoder.go
@@ -38,6 +38,10 @@ func NewTreeRootNode(t *Tree) noder.Noder {
 	}
 }
 
+func (t *treeNoder) Skip() bool {
+	return false
+}
+
 func (t *treeNoder) isRoot() bool {
 	return t.name == ""
 }
diff --git a/plumbing/protocol/packp/common.go b/plumbing/protocol/packp/common.go
index ab07ac8..fef50a4 100644
--- a/plumbing/protocol/packp/common.go
+++ b/plumbing/protocol/packp/common.go
@@ -19,7 +19,6 @@ var (
 	// common
 	sp  = []byte(" ")
 	eol = []byte("\n")
-	eq  = []byte{'='}
 
 	// advertised-refs
 	null       = []byte("\x00")
diff --git a/plumbing/protocol/packp/updreq.go b/plumbing/protocol/packp/updreq.go
index 46ad6fd..5dbd8ac 100644
--- a/plumbing/protocol/packp/updreq.go
+++ b/plumbing/protocol/packp/updreq.go
@@ -87,9 +87,9 @@ type Action string
 
 const (
 	Create  Action = "create"
-	Update         = "update"
-	Delete         = "delete"
-	Invalid        = "invalid"
+	Update  Action = "update"
+	Delete  Action = "delete"
+	Invalid Action = "invalid"
 )
 
 type Command struct {
diff --git a/plumbing/protocol/packp/updreq_encode.go b/plumbing/protocol/packp/updreq_encode.go
index 08a819e..1205cfa 100644
--- a/plumbing/protocol/packp/updreq_encode.go
+++ b/plumbing/protocol/packp/updreq_encode.go
@@ -9,10 +9,6 @@ import (
 	"github.com/go-git/go-git/v5/plumbing/protocol/packp/capability"
 )
 
-var (
-	zeroHashString = plumbing.ZeroHash.String()
-)
-
 // Encode writes the ReferenceUpdateRequest encoding to the stream.
 func (req *ReferenceUpdateRequest) Encode(w io.Writer) error {
 	if err := req.validate(); err != nil {
diff --git a/plumbing/protocol/packp/updreq_encode_test.go b/plumbing/protocol/packp/updreq_encode_test.go
index 6ba0043..4370b79 100644
--- a/plumbing/protocol/packp/updreq_encode_test.go
+++ b/plumbing/protocol/packp/updreq_encode_test.go
@@ -170,3 +170,22 @@ func (s *UpdReqEncodeSuite) TestPushOptions(c *C) {
 
 	s.testEncode(c, r, expected)
 }
+
+func (s *UpdReqEncodeSuite) TestPushAtomic(c *C) {
+	hash1 := plumbing.NewHash("1ecf0ef2c2dffb796033e5a02219af86ec6584e5")
+	hash2 := plumbing.NewHash("2ecf0ef2c2dffb796033e5a02219af86ec6584e5")
+	name := plumbing.ReferenceName("myref")
+
+	r := NewReferenceUpdateRequest()
+	r.Capabilities.Set(capability.Atomic)
+	r.Commands = []*Command{
+		{Name: name, Old: hash1, New: hash2},
+	}
+
+	expected := pktlines(c,
+		"1ecf0ef2c2dffb796033e5a02219af86ec6584e5 2ecf0ef2c2dffb796033e5a02219af86ec6584e5 myref\x00atomic",
+		pktline.FlushString,
+	)
+
+	s.testEncode(c, r, expected)
+}
diff --git a/plumbing/protocol/packp/uppackresp.go b/plumbing/protocol/packp/uppackresp.go
index a9a7192..26ae61e 100644
--- a/plumbing/protocol/packp/uppackresp.go
+++ b/plumbing/protocol/packp/uppackresp.go
@@ -24,7 +24,6 @@ type UploadPackResponse struct {
 	r          io.ReadCloser
 	isShallow  bool
 	isMultiACK bool
-	isOk       bool
 }
 
 // NewUploadPackResponse create a new UploadPackResponse instance, the request
diff --git a/plumbing/revlist/revlist_test.go b/plumbing/revlist/revlist_test.go
index a1ee504..9f2f93b 100644
--- a/plumbing/revlist/revlist_test.go
+++ b/plumbing/revlist/revlist_test.go
@@ -55,12 +55,6 @@ func (s *RevListSuite) SetUpTest(c *C) {
 	s.Storer = sto
 }
 
-func (s *RevListSuite) commit(c *C, h plumbing.Hash) *object.Commit {
-	commit, err := object.GetCommit(s.Storer, h)
-	c.Assert(err, IsNil)
-	return commit
-}
-
 func (s *RevListSuite) TestRevListObjects_Submodules(c *C) {
 	submodules := map[string]bool{
 		"6ecf0ef2c2dffb796033e5a02219af86ec6584e5": true,
diff --git a/plumbing/transport/client/client_test.go b/plumbing/transport/client/client_test.go
index 9ebe113..92db525 100644
--- a/plumbing/transport/client/client_test.go
+++ b/plumbing/transport/client/client_test.go
@@ -1,7 +1,6 @@
 package client
 
 import (
-	"fmt"
 	"net/http"
 	"testing"
 
@@ -68,7 +67,3 @@ func (*dummyClient) NewReceivePackSession(*transport.Endpoint, transport.AuthMet
 	transport.ReceivePackSession, error) {
 	return nil, nil
 }
-
-func typeAsString(v interface{}) string {
-	return fmt.Sprintf("%T", v)
-}
diff --git a/plumbing/transport/internal/common/common.go b/plumbing/transport/internal/common/common.go
index fdb148f..d0e9a29 100644
--- a/plumbing/transport/internal/common/common.go
+++ b/plumbing/transport/internal/common/common.go
@@ -428,11 +428,6 @@ func isRepoNotFoundError(s string) bool {
 	return false
 }
 
-var (
-	nak = []byte("NAK")
-	eol = []byte("\n")
-)
-
 // uploadPack implements the git-upload-pack protocol.
 func uploadPack(w io.WriteCloser, r io.Reader, req *packp.UploadPackRequest) error {
 	// TODO support multi_ack mode
diff --git a/plumbing/transport/ssh/common_test.go b/plumbing/transport/ssh/common_test.go
index e04a9c5..6d634d5 100644
--- a/plumbing/transport/ssh/common_test.go
+++ b/plumbing/transport/ssh/common_test.go
@@ -7,7 +7,6 @@ import (
 
 	"github.com/kevinburke/ssh_config"
 	"golang.org/x/crypto/ssh"
-	stdssh "golang.org/x/crypto/ssh"
 	. "gopkg.in/check.v1"
 )
 
@@ -99,7 +98,7 @@ func (s *SuiteCommon) TestIssue70(c *C) {
 	uploadPack.SetUpSuite(c)
 
 	config := &ssh.ClientConfig{
-		HostKeyCallback: stdssh.InsecureIgnoreHostKey(),
+		HostKeyCallback: ssh.InsecureIgnoreHostKey(),
 	}
 	r := &runner{
 		config: config,