*: Use CheckClose with named returns

Previously some close errors were losts. This is specially problematic
in go-git as lots of work is done here like generating indexes and
moving packfiles.

Signed-off-by: Javi Fontan <jfontan@gmail.com>

8 files changed, 15 insertions, 14 deletions

diff --git a/plumbing/format/packfile/common.go b/plumbing/format/packfile/common.go
index 7dad1f6..beb015d 100644
--- a/plumbing/format/packfile/common.go
+++ b/plumbing/format/packfile/common.go
@@ -40,8 +40,7 @@ func UpdateObjectStorage(s storer.EncodedObjectStorer, packfile io.Reader) error
 	return err
 }
 
-func writePackfileToObjectStorage(sw storer.PackfileWriter, packfile io.Reader) error {
-	var err error
+func writePackfileToObjectStorage(sw storer.PackfileWriter, packfile io.Reader) (err error) {
 	w, err := sw.PackfileWriter()
 	if err != nil {
 		return err
diff --git a/plumbing/format/packfile/scanner.go b/plumbing/format/packfile/scanner.go
index 8c216f1..6fc183b 100644
--- a/plumbing/format/packfile/scanner.go
+++ b/plumbing/format/packfile/scanner.go
@@ -279,14 +279,15 @@ func (s *Scanner) NextObject(w io.Writer) (written int64, crc32 uint32, err erro
 // from it zlib stream in an object entry in the packfile.
 func (s *Scanner) copyObject(w io.Writer) (n int64, err error) {
 	if s.zr == nil {
-		zr, err := zlib.NewReader(s.r)
+		var zr io.ReadCloser
+		zr, err = zlib.NewReader(s.r)
 		if err != nil {
 			return 0, fmt.Errorf("zlib initialization error: %s", err)
 		}
 
 		s.zr = zr.(readerResetter)
 	} else {
-		if err := s.zr.Reset(s.r, nil); err != nil {
+		if err = s.zr.Reset(s.r, nil); err != nil {
 			return 0, fmt.Errorf("zlib reset error: %s", err)
 		}
 	}
diff --git a/plumbing/object/blob.go b/plumbing/object/blob.go
index 2608477..f376baa 100644
--- a/plumbing/object/blob.go
+++ b/plumbing/object/blob.go
@@ -67,7 +67,7 @@ func (b *Blob) Decode(o plumbing.EncodedObject) error {
 }
 
 // Encode transforms a Blob into a plumbing.EncodedObject.
-func (b *Blob) Encode(o plumbing.EncodedObject) error {
+func (b *Blob) Encode(o plumbing.EncodedObject) (err error) {
 	o.SetType(plumbing.BlobObject)
 
 	w, err := o.Writer()
diff --git a/plumbing/object/commit.go b/plumbing/object/commit.go
index a317714..c9a4c0e 100644
--- a/plumbing/object/commit.go
+++ b/plumbing/object/commit.go
@@ -226,7 +226,7 @@ func (b *Commit) Encode(o plumbing.EncodedObject) error {
 	return b.encode(o, true)
 }
 
-func (b *Commit) encode(o plumbing.EncodedObject, includeSig bool) error {
+func (b *Commit) encode(o plumbing.EncodedObject, includeSig bool) (err error) {
 	o.SetType(plumbing.CommitObject)
 	w, err := o.Writer()
 	if err != nil {
diff --git a/plumbing/object/file.go b/plumbing/object/file.go
index 40b5206..1c5fdbb 100644
--- a/plumbing/object/file.go
+++ b/plumbing/object/file.go
@@ -44,7 +44,7 @@ func (f *File) Contents() (content string, err error) {
 }
 
 // IsBinary returns if the file is binary or not
-func (f *File) IsBinary() (bool, error) {
+func (f *File) IsBinary() (bin bool, err error) {
 	reader, err := f.Reader()
 	if err != nil {
 		return false, err
diff --git a/plumbing/object/tag.go b/plumbing/object/tag.go
index 19e55cf..905206b 100644
--- a/plumbing/object/tag.go
+++ b/plumbing/object/tag.go
@@ -95,7 +95,8 @@ func (t *Tag) Decode(o plumbing.EncodedObject) (err error) {
 
 	r := bufio.NewReader(reader)
 	for {
-		line, err := r.ReadBytes('\n')
+		var line []byte
+		line, err = r.ReadBytes('\n')
 		if err != nil && err != io.EOF {
 			return err
 		}
@@ -168,7 +169,7 @@ func (t *Tag) Encode(o plumbing.EncodedObject) error {
 	return t.encode(o, true)
 }
 
-func (t *Tag) encode(o plumbing.EncodedObject, includeSig bool) error {
+func (t *Tag) encode(o plumbing.EncodedObject, includeSig bool) (err error) {
 	o.SetType(plumbing.TagObject)
 	w, err := o.Writer()
 	if err != nil {
diff --git a/plumbing/object/tree.go b/plumbing/object/tree.go
index 2fcd979..c2399f8 100644
--- a/plumbing/object/tree.go
+++ b/plumbing/object/tree.go
@@ -233,7 +233,7 @@ func (t *Tree) Decode(o plumbing.EncodedObject) (err error) {
 }
 
 // Encode transforms a Tree into a plumbing.EncodedObject.
-func (t *Tree) Encode(o plumbing.EncodedObject) error {
+func (t *Tree) Encode(o plumbing.EncodedObject) (err error) {
 	o.SetType(plumbing.TreeObject)
 	w, err := o.Writer()
 	if err != nil {
@@ -242,7 +242,7 @@ func (t *Tree) Encode(o plumbing.EncodedObject) error {
 
 	defer ioutil.CheckClose(w, &err)
 	for _, entry := range t.Entries {
-		if _, err := fmt.Fprintf(w, "%o %s", entry.Mode, entry.Name); err != nil {
+		if _, err = fmt.Fprintf(w, "%o %s", entry.Mode, entry.Name); err != nil {
 			return err
 		}
 
diff --git a/plumbing/transport/http/common.go b/plumbing/transport/http/common.go
index 24e63a4..2c337b7 100644
--- a/plumbing/transport/http/common.go
+++ b/plumbing/transport/http/common.go
@@ -31,7 +31,7 @@ func applyHeadersToRequest(req *http.Request, content *bytes.Buffer, host string
 
 const infoRefsPath = "/info/refs"
 
-func advertisedReferences(s *session, serviceName string) (*packp.AdvRefs, error) {
+func advertisedReferences(s *session, serviceName string) (ref *packp.AdvRefs, err error) {
 	url := fmt.Sprintf(
 		"%s%s?service=%s",
 		s.endpoint.String(), infoRefsPath, serviceName,
@@ -52,12 +52,12 @@ func advertisedReferences(s *session, serviceName string) (*packp.AdvRefs, error
 	s.ModifyEndpointIfRedirect(res)
 	defer ioutil.CheckClose(res.Body, &err)
 
-	if err := NewErr(res); err != nil {
+	if err = NewErr(res); err != nil {
 		return nil, err
 	}
 
 	ar := packp.NewAdvRefs()
-	if err := ar.Decode(res.Body); err != nil {
+	if err = ar.Decode(res.Body); err != nil {
 		if err == packp.ErrEmptyAdvRefs {
 			err = transport.ErrEmptyRemoteRepository
 		}