Add package of Sirupsen/logrus to vendor

.travis.yml

@@ -1,7 +1,7 @@
 language: go
 go:
-  - 1.6
   - 1.7
+  - 1.8
 
 sudo: required
 

glide.yaml

@@ -17,3 +17,5 @@ import:
   version: 9c28e4bbd74e5c3ed7aacbc552b2cab7cfdfe744
 - package: github.com/spf13/pflag
   version: 7b17cc4658ef5ca157b986ea5c0b43af7938532b
+- package: github.com/Sirupsen/logrus
+  version: ~0.10.0

image/autodetect.go

@@ -70,7 +70,7 @@ func Autodetect(path string) (string, error) {
 		return "", errors.New("unknown file type")
 	}
 
-	if _, err := f.Seek(0, os.SEEK_SET); err != nil {
+	if _, err := f.Seek(0, io.SeekStart); err != nil {
 		return "", errors.Wrap(err, "unable to seek")
 	}
 
@@ -81,7 +81,7 @@ func Autodetect(path string) (string, error) {
 	}{}
 
 	if err := json.NewDecoder(f).Decode(&header); err != nil {
-		if _, errSeek := f.Seek(0, os.SEEK_SET); errSeek != nil {
+		if _, errSeek := f.Seek(0, io.SeekStart); errSeek != nil {
 			return "", errors.Wrap(err, "unable to seek")
 		}
 

image/walker.go

@@ -49,7 +49,7 @@ func newTarWalker(tarFile string, r io.ReadSeeker) walker {
 }
 
 func (w *tarWalker) walk(f walkFunc) error {
-	if _, err := w.r.Seek(0, os.SEEK_SET); err != nil {
+	if _, err := w.r.Seek(0, io.SeekStart); err != nil {
 		return errors.Wrapf(err, "unable to reset")
 	}