diff --git a/vendor/github.com/bsm/sarama-cluster/util.go b/vendor/github.com/bsm/sarama-cluster/util.go
new file mode 100644
index 0000000..e7cb5dd
--- /dev/null
+++ b/vendor/github.com/bsm/sarama-cluster/util.go
@@ -0,0 +1,75 @@
+package cluster
+
+import (
+	"fmt"
+	"sort"
+	"sync"
+)
+
+type none struct{}
+
+type topicPartition struct {
+	Topic     string
+	Partition int32
+}
+
+func (tp *topicPartition) String() string {
+	return fmt.Sprintf("%s-%d", tp.Topic, tp.Partition)
+}
+
+type offsetInfo struct {
+	Offset   int64
+	Metadata string
+}
+
+func (i offsetInfo) NextOffset(fallback int64) int64 {
+	if i.Offset > -1 {
+		return i.Offset
+	}
+	return fallback
+}
+
+type int32Slice []int32
+
+func (p int32Slice) Len() int           { return len(p) }
+func (p int32Slice) Less(i, j int) bool { return p[i] < p[j] }
+func (p int32Slice) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }
+
+func (p int32Slice) Diff(o int32Slice) (res []int32) {
+	on := len(o)
+	for _, x := range p {
+		n := sort.Search(on, func(i int) bool { return o[i] >= x })
+		if n < on && o[n] == x {
+			continue
+		}
+		res = append(res, x)
+	}
+	return
+}
+
+// --------------------------------------------------------------------
+
+type loopTomb struct {
+	c chan none
+	o sync.Once
+	w sync.WaitGroup
+}
+
+func newLoopTomb() *loopTomb {
+	return &loopTomb{c: make(chan none)}
+}
+
+func (t *loopTomb) stop()  { t.o.Do(func() { close(t.c) }) }
+func (t *loopTomb) Close() { t.stop(); t.w.Wait() }
+
+func (t *loopTomb) Dying() <-chan none { return t.c }
+func (t *loopTomb) Go(f func(<-chan none)) {
+	t.w.Add(1)
+
+	go func() {
+		defer t.stop()
+		defer t.w.Done()
+
+		f(t.c)
+	}()
+}