Wrap errors (#161)

Package errors provides simple error handling primitives.
Read more on https://github.com/pkg/errors

protocols/netlink/netlink_writer.go

@@ -9,6 +9,7 @@ import (
 	"github.com/bio-routing/bio-rd/route"
 	"github.com/bio-routing/bio-rd/routingtable"
 	"github.com/bio-routing/bio-rd/routingtable/filter"
+	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"github.com/vishvananda/netlink"
 )
@@ -144,7 +145,7 @@ func (nw *NetlinkWriter) addKernel(pfx bnet.Prefix) error {
 	err = netlink.RouteAdd(route)
 	if err != nil {
 		log.Errorf("Error while adding route: %v", err)
-		return fmt.Errorf("Error while adding route: %v", err)
+		return errors.Wrap(err, "Error while adding route")
 	}
 
 	return nil
@@ -163,7 +164,7 @@ func (nw *NetlinkWriter) removeKernel(pfx bnet.Prefix, paths []*route.Path) erro
 
 	err = netlink.RouteDel(route)
 	if err != nil {
-		return fmt.Errorf("Error while removing route: %v", err)
+		return errors.Wrap(err, "Error while removing route")
 	}
 
 	return nil

routingtable/adjRIBOut/adj_rib_out.go

@@ -8,6 +8,7 @@ import (
 	"github.com/bio-routing/bio-rd/route"
 	"github.com/bio-routing/bio-rd/routingtable"
 	"github.com/bio-routing/bio-rd/routingtable/filter"
+	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
 
@@ -98,7 +99,7 @@ func (a *AdjRIBOut) AddPath(pfx bnet.Prefix, p *route.Path) error {
 	if a.addPathTX {
 		pathID, err := a.pathIDManager.addPath(p)
 		if err != nil {
-			return fmt.Errorf("Unable to get path ID: %v", err)
+			return errors.Wrap(err, "Unable to get path ID")
 		}
 
 		p.BGPPath.PathIdentifier = pathID

util/decode/decode.go

@@ -3,7 +3,8 @@ package decode
 import (
 	"bytes"
 	"encoding/binary"
-	"fmt"
+
+	"github.com/pkg/errors"
 )
 
 // Decode reads fields from a buffer
@@ -12,7 +13,7 @@ func Decode(buf *bytes.Buffer, fields []interface{}) error {
 	for _, field := range fields {
 		err = binary.Read(buf, binary.BigEndian, field)
 		if err != nil {
-			return fmt.Errorf("Unable to read from buffer: %v", err)
+			return errors.Wrap(err, "Unable to read from buffer")
 		}
 	}
 	return nil

util/decoder/decoder.go

@@ -3,7 +3,8 @@ package decoder
 import (
 	"bytes"
 	"encoding/binary"
-	"fmt"
+
+	"github.com/pkg/errors"
 )
 
 // Decode decodes network packets
@@ -12,7 +13,7 @@ func Decode(buf *bytes.Buffer, fields []interface{}) error {
 	for _, field := range fields {
 		err = binary.Read(buf, binary.BigEndian, field)
 		if err != nil {
-			return fmt.Errorf("Unable to read from buffer: %v", err)
+			return errors.Wrap(err, "Unable to read from buffer")
 		}
 	}
 	return nil