Merge pull request #1199 from src-d/clean-up

*: code quality improvements

17 files changed, 22 insertions, 37 deletions

diff --git a/plumbing/format/commitgraph/encoder.go b/plumbing/format/commitgraph/encoder.go
index a06871c..615e833 100644
--- a/plumbing/format/commitgraph/encoder.go
+++ b/plumbing/format/commitgraph/encoder.go
@@ -24,8 +24,6 @@ func NewEncoder(w io.Writer) *Encoder {
 

 // Encode writes an index into the commit-graph file

 func (e *Encoder) Encode(idx Index) error {

-	var err error

-

 	// Get all the hashes in the input index

 	hashes := idx.Hashes()

 

@@ -39,26 +37,26 @@ func (e *Encoder) Encode(idx Index) error {
 		chunkSizes = append(chunkSizes, uint64(extraEdgesCount)*4)

 	}

 

-	if err = e.encodeFileHeader(len(chunkSignatures)); err != nil {

+	if err := e.encodeFileHeader(len(chunkSignatures)); err != nil {

 		return err

 	}

-	if err = e.encodeChunkHeaders(chunkSignatures, chunkSizes); err != nil {

+	if err := e.encodeChunkHeaders(chunkSignatures, chunkSizes); err != nil {

 		return err

 	}

-	if err = e.encodeFanout(fanout); err != nil {

+	if err := e.encodeFanout(fanout); err != nil {

 		return err

 	}

-	if err = e.encodeOidLookup(hashes); err != nil {

+	if err := e.encodeOidLookup(hashes); err != nil {

 		return err

 	}

 	if extraEdges, err := e.encodeCommitData(hashes, hashToIndex, idx); err == nil {

 		if err = e.encodeExtraEdges(extraEdges); err != nil {

 			return err

 		}

-	}

-	if err != nil {

+	} else {

 		return err

 	}

+

 	return e.encodeChecksum()

 }

 

diff --git a/plumbing/format/commitgraph/file.go b/plumbing/format/commitgraph/file.go
index 175d279..1f82abd 100644
--- a/plumbing/format/commitgraph/file.go
+++ b/plumbing/format/commitgraph/file.go
@@ -249,7 +249,7 @@ func (fi *fileIndex) getHashesFromIndexes(indexes []int) ([]plumbing.Hash, error
 // Hashes returns all the hashes that are available in the index

 func (fi *fileIndex) Hashes() []plumbing.Hash {

 	hashes := make([]plumbing.Hash, fi.fanout[0xff])

-	for i := 0; i < int(fi.fanout[0xff]); i++ {

+	for i := 0; i < fi.fanout[0xff]; i++ {

 		offset := fi.oidLookupOffset + int64(i)*20

 		if n, err := fi.reader.ReadAt(hashes[i][:], offset); err != nil || n < 20 {

 			return nil

diff --git a/plumbing/format/commitgraph/memory.go b/plumbing/format/commitgraph/memory.go
index a4a96e9..f5afd4c 100644
--- a/plumbing/format/commitgraph/memory.go
+++ b/plumbing/format/commitgraph/memory.go
@@ -31,7 +31,7 @@ func (mi *MemoryIndex) GetIndexByHash(h plumbing.Hash) (int, error) {
 // GetCommitDataByIndex gets the commit node from the commit graph using index

 // obtained from child node, if available

 func (mi *MemoryIndex) GetCommitDataByIndex(i int) (*CommitData, error) {

-	if int(i) >= len(mi.commitData) {

+	if i >= len(mi.commitData) {

 		return nil, plumbing.ErrObjectNotFound

 	}

 

diff --git a/plumbing/format/diff/unified_encoder.go b/plumbing/format/diff/unified_encoder.go
index 8bd6d8a..169242d 100644
--- a/plumbing/format/diff/unified_encoder.go
+++ b/plumbing/format/diff/unified_encoder.go
@@ -94,7 +94,7 @@ func (e *UnifiedEncoder) printMessage(message string) {
 	isEmpty := message == ""
 	hasSuffix := strings.HasSuffix(message, "\n")
 	if !isEmpty && !hasSuffix {
-		message = message + "\n"
+		message += "\n"
 	}
 
 	e.buf.WriteString(message)
diff --git a/plumbing/format/gitattributes/pattern.go b/plumbing/format/gitattributes/pattern.go
index c5ca0c7..d961aba 100644
--- a/plumbing/format/gitattributes/pattern.go
+++ b/plumbing/format/gitattributes/pattern.go
@@ -66,7 +66,7 @@ func (p *pattern) Match(path []string) bool {
 			doublestar = true
 		}
 
-		switch true {
+		switch {
 		case strings.Contains(pattern[0], "**"):
 			return false
 
diff --git a/plumbing/format/idxfile/decoder.go b/plumbing/format/idxfile/decoder.go
index 5b92782..9e9c176 100644
--- a/plumbing/format/idxfile/decoder.go
+++ b/plumbing/format/idxfile/decoder.go
@@ -110,10 +110,6 @@ func readObjectNames(idx *MemoryIndex, r io.Reader) error {
 			continue
 		}
 
-		if buckets < 0 {
-			return ErrMalformedIdxFile
-		}
-
 		idx.FanoutMapping[k] = len(idx.Names)
 
 		nameLen := int(buckets * objectIDLength)
diff --git a/plumbing/format/idxfile/writer.go b/plumbing/format/idxfile/writer.go
index aa919e7..fcc78c5 100644
--- a/plumbing/format/idxfile/writer.go
+++ b/plumbing/format/idxfile/writer.go
@@ -147,7 +147,7 @@ func (w *Writer) createIndex() (*MemoryIndex, error) {
 		idx.Offset32[bucket] = append(idx.Offset32[bucket], buf.Bytes()...)
 
 		buf.Truncate(0)
-		binary.WriteUint32(buf, uint32(o.CRC32))
+		binary.WriteUint32(buf, o.CRC32)
 		idx.CRC32[bucket] = append(idx.CRC32[bucket], buf.Bytes()...)
 	}
 
diff --git a/plumbing/format/packfile/scanner_test.go b/plumbing/format/packfile/scanner_test.go
index a401d6d..3078477 100644
--- a/plumbing/format/packfile/scanner_test.go
+++ b/plumbing/format/packfile/scanner_test.go
@@ -140,6 +140,7 @@ func (s *ScannerSuite) TestReaderReset(c *C) {
 	p := NewScanner(r)
 
 	version, objects, err := p.Header()
+	c.Assert(err, IsNil)
 	c.Assert(version, Equals, VersionSupported)
 	c.Assert(objects, Equals, uint32(31))
 
diff --git a/plumbing/object/commit_walker_bfs_filtered_test.go b/plumbing/object/commit_walker_bfs_filtered_test.go
index d31bdf0..6984b60 100644
--- a/plumbing/object/commit_walker_bfs_filtered_test.go
+++ b/plumbing/object/commit_walker_bfs_filtered_test.go
@@ -29,9 +29,7 @@ func commitsFromIter(iter CommitIter) ([]*Commit, error) {
 func assertHashes(c *C, commits []*Commit, hashes []string) {
 	if len(commits) != len(hashes) {
 		var expected []string
-		for _, c := range hashes {
-			expected = append(expected, c)
-		}
+		expected = append(expected, hashes...)
 		fmt.Println("expected:", strings.Join(expected, ", "))
 		var got []string
 		for _, c := range commits {
@@ -48,11 +46,7 @@ func assertHashes(c *C, commits []*Commit, hashes []string) {
 
 func validIfCommit(ignored plumbing.Hash) CommitFilter {
 	return func(c *Commit) bool {
-		if c.Hash == ignored {
-			return true
-		}
-
-		return false
+		return c.Hash == ignored
 	}
 }
 
diff --git a/plumbing/object/merge_base.go b/plumbing/object/merge_base.go
index 689e421..6f2568d 100644
--- a/plumbing/object/merge_base.go
+++ b/plumbing/object/merge_base.go
@@ -32,7 +32,7 @@ func (c *Commit) MergeBase(other *Commit) ([]*Commit, error) {
 	var res []*Commit
 	inNewerHistory := isInIndexCommitFilter(newerHistory)
 	resIter := NewFilterCommitIter(older, &inNewerHistory, &inNewerHistory)
-	err = resIter.ForEach(func(commit *Commit) error {
+	_ = resIter.ForEach(func(commit *Commit) error {
 		res = append(res, commit)
 		return nil
 	})
diff --git a/plumbing/object/patch.go b/plumbing/object/patch.go
index 1efd0b1..32454ac 100644
--- a/plumbing/object/patch.go
+++ b/plumbing/object/patch.go
@@ -278,7 +278,7 @@ func printStat(fileStats []FileStat) string {
 	var scaleFactor float64
 	if longestTotalChange > heightOfHistogram {
 		// Scale down to heightOfHistogram.
-		scaleFactor = float64(longestTotalChange / heightOfHistogram)
+		scaleFactor = longestTotalChange / heightOfHistogram
 	} else {
 		scaleFactor = 1.0
 	}
diff --git a/plumbing/object/patch_test.go b/plumbing/object/patch_test.go
index 47057fb..37944c3 100644
--- a/plumbing/object/patch_test.go
+++ b/plumbing/object/patch_test.go
@@ -19,6 +19,7 @@ func (s *PatchSuite) TestStatsWithSubmodules(c *C) {
 		fixtures.ByURL("https://github.com/git-fixtures/submodule.git").One().DotGit(), cache.NewObjectLRUDefault())
 
 	commit, err := GetCommit(storer, plumbing.NewHash("b685400c1f9316f350965a5993d350bc746b0bf4"))
+	c.Assert(err, IsNil)
 
 	tree, err := commit.Tree()
 	c.Assert(err, IsNil)
diff --git a/plumbing/object/tree.go b/plumbing/object/tree.go
index d30cf6e..d0b4fff 100644
--- a/plumbing/object/tree.go
+++ b/plumbing/object/tree.go
@@ -288,7 +288,7 @@ func (t *Tree) Encode(o plumbing.EncodedObject) (err error) {
 			return err
 		}
 
-		if _, err = w.Write([]byte(entry.Hash[:])); err != nil {
+		if _, err = w.Write(entry.Hash[:]); err != nil {
 			return err
 		}
 	}
@@ -517,4 +517,4 @@ func simpleJoin(parent, child string) string {
 		return parent + "/" + child
 	}
 	return child
-}
\ No newline at end of file
+}
diff --git a/plumbing/protocol/packp/advrefs.go b/plumbing/protocol/packp/advrefs.go
index 684e76a..487ee19 100644
--- a/plumbing/protocol/packp/advrefs.go
+++ b/plumbing/protocol/packp/advrefs.go
@@ -107,7 +107,7 @@ func (a *AdvRefs) resolveHead(s storer.ReferenceStorer) error {
 		return nil
 	}
 
-	ref, err := s.Reference(plumbing.ReferenceName(plumbing.Master))
+	ref, err := s.Reference(plumbing.Master)
 
 	// check first if HEAD is pointing to master
 	if err == nil {
diff --git a/plumbing/protocol/packp/updreq_decode.go b/plumbing/protocol/packp/updreq_decode.go
index c15d49c..51e8183 100644
--- a/plumbing/protocol/packp/updreq_decode.go
+++ b/plumbing/protocol/packp/updreq_decode.go
@@ -225,7 +225,7 @@ func parseCommand(b []byte) (*Command, error) {
 		return nil, errInvalidNewObjId(err)
 	}
 
-	return &Command{Old: oh, New: nh, Name: plumbing.ReferenceName(n)}, nil
+	return &Command{Old: oh, New: nh, Name: n}, nil
 }
 
 func parseHash(s string) (plumbing.Hash, error) {
diff --git a/plumbing/transport/server/server.go b/plumbing/transport/server/server.go
index 20bd12e..8e0dcc1 100644
--- a/plumbing/transport/server/server.go
+++ b/plumbing/transport/server/server.go
@@ -286,11 +286,6 @@ func (s *rpSession) updateReferences(req *packp.ReferenceUpdateRequest) {
 				continue
 			}
 
-			if err != nil {
-				s.setStatus(cmd.Name, err)
-				continue
-			}
-
 			ref := plumbing.NewHashReference(cmd.Name, cmd.New)
 			err := s.storer.SetReference(ref)
 			s.setStatus(cmd.Name, err)
diff --git a/plumbing/transport/ssh/auth_method.go b/plumbing/transport/ssh/auth_method.go
index dbb47c5..1e5c383 100644
--- a/plumbing/transport/ssh/auth_method.go
+++ b/plumbing/transport/ssh/auth_method.go
@@ -61,7 +61,7 @@ func (a *KeyboardInteractive) ClientConfig() (*ssh.ClientConfig, error) {
 	return a.SetHostKeyCallback(&ssh.ClientConfig{
 		User: a.User,
 		Auth: []ssh.AuthMethod{
-			ssh.KeyboardInteractiveChallenge(a.Challenge),
+			a.Challenge,
 		},
 	})
 }