Remove unused bits and pieces

Reported by https://github.com/dominikh/go-unused

src/restic/backend/test/tests.go

@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"math/rand"
 	"reflect"
 	"restic"
@@ -471,14 +470,6 @@ func store(t testing.TB, b restic.Backend, tpe restic.FileType, data []byte) {
 	test.OK(t, err)
 }
 
-func read(t testing.TB, rd io.Reader, expectedData []byte) {
-	buf, err := ioutil.ReadAll(rd)
-	test.OK(t, err)
-	if expectedData != nil {
-		test.Equals(t, expectedData, buf)
-	}
-}
-
 // TestBackend tests all functions of the backend.
 func TestBackend(t testing.TB) {
 	b := open(t)

src/restic/checker/checker_test.go

@@ -16,17 +16,6 @@ import (
 
 var checkerTestData = filepath.Join("testdata", "checker-test-repo.tar.gz")
 
-func list(repo restic.Repository, t restic.FileType) (IDs []string) {
-	done := make(chan struct{})
-	defer close(done)
-
-	for id := range repo.List(t, done) {
-		IDs = append(IDs, id.String())
-	}
-
-	return IDs
-}
-
 func collectErrors(f func(chan<- error, <-chan struct{})) (errs []error) {
 	done := make(chan struct{})
 	defer close(done)

src/restic/crypto/buffer_pool.go

@@ -1,19 +0,0 @@
-package crypto
-
-import "sync"
-
-const defaultBufSize = 32 * 1024 // 32KiB
-
-var bufPool = sync.Pool{
-	New: func() interface{} {
-		return make([]byte, defaultBufSize)
-	},
-}
-
-func getBuffer() []byte {
-	return bufPool.Get().([]byte)
-}
-
-func freeBuffer(buf []byte) {
-	bufPool.Put(buf)
-}

src/restic/index/index.go

@@ -77,8 +77,6 @@ func New(repo restic.Repository, p *restic.Progress) (*Index, error) {
 	return idx, nil
 }
 
-const loadIndexParallelism = 20
-
 type packJSON struct {
 	ID    restic.ID  `json:"id"`
 	Blobs []blobJSON `json:"blobs"`

src/restic/index/index_test.go

@@ -10,7 +10,6 @@ import (
 
 var (
 	snapshotTime = time.Unix(1470492820, 207401672)
-	snapshots    = 3
 	depth        = 3
 )
 

src/restic/node.go

@@ -43,7 +43,6 @@ type Node struct {
 	tree *Tree
 
 	Path string `json:"-"`
-	err  error
 }
 
 func (node Node) String() string {

src/restic/pipe/pipe.go

@@ -74,12 +74,6 @@ func readDirNames(dirname string) ([]string, error) {
 	return names, nil
 }
 
-func isDir(fi os.FileInfo) bool {
-	return fi.IsDir()
-}
-
-var errCancelled = errors.New("walk cancelled")
-
 // SelectFunc returns true for all items that should be included (files and
 // dirs). If false is returned, files are ignored and dirs are not even walked.
 type SelectFunc func(item string, fi os.FileInfo) bool

src/restic/pipe/pipe_test.go

@@ -14,10 +14,6 @@ import (
 	. "restic/test"
 )
 
-func isFile(fi os.FileInfo) bool {
-	return fi.Mode()&(os.ModeType|os.ModeCharDevice) == 0
-}
-
 type stats struct {
 	dirs, files int
 }

src/restic/repository/index.go

@@ -346,8 +346,6 @@ type jsonIndex struct {
 	Packs      []*packJSON `json:"packs"`
 }
 
-type jsonOldIndex []*packJSON
-
 // Encode writes the JSON serialization of the index to the writer w.
 func (idx *Index) Encode(w io.Writer) error {
 	debug.Log("Index.Encode", "encoding index")

src/restic/repository/repository.go

@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
-	"io"
 	"os"
 	"restic"
 
@@ -156,16 +155,6 @@ func (r *Repository) loadBlob(id restic.ID, t restic.BlobType, plaintextBuf []by
 	return 0, errors.Errorf("loading blob %v from %v packs failed", id.Str(), len(blobs))
 }
 
-// closeOrErr calls cl.Close() and sets err to the returned error value if
-// itself is not yet set.
-func closeOrErr(cl io.Closer, err *error) {
-	e := cl.Close()
-	if *err != nil {
-		return
-	}
-	*err = e
-}
-
 // LoadJSONUnpacked decrypts the data and afterwards calls json.Unmarshal on
 // the item.
 func (r *Repository) LoadJSONUnpacked(t restic.FileType, id restic.ID, item interface{}) (err error) {

src/restic/repository/repository_test.go

@@ -234,11 +234,6 @@ func TestRepositoryIncrementalIndex(t *testing.T) {
 	// save final index
 	OK(t, repo.SaveIndex())
 
-	type packEntry struct {
-		id      restic.ID
-		indexes []*repository.Index
-	}
-
 	packEntries := make(map[restic.ID]map[restic.ID]struct{})
 
 	for id := range repo.List(restic.IndexFile, nil) {