sync: replace container/heap with github.com/aalpar/deheap

fs/sync/pipe.go

@@ -1,11 +1,11 @@
 package sync
 
 import (
-	"container/heap"
 	"context"
 	"strings"
 	"sync"
 
+	"github.com/aalpar/deheap"
 	"github.com/pkg/errors"
 	"github.com/rclone/rclone/fs"
 	"github.com/rclone/rclone/fs/fserrors"
@@ -38,7 +38,7 @@ func newPipe(orderBy string, stats func(items int, totalSize int64), maxBacklog
 		less:  less,
 	}
 	if p.less != nil {
-		heap.Init(p)
+		deheap.Init(p)
 	}
 	return p, nil
 }
@@ -73,9 +73,6 @@ func (p *pipe) Pop() interface{} {
 	return item
 }
 
-// Check interface satisfied
-var _ heap.Interface = (*pipe)(nil)
-
 // Put an pair into the pipe
 //
 // It returns ok = false if the context was cancelled
@@ -90,7 +87,7 @@ func (p *pipe) Put(ctx context.Context, pair fs.ObjectPair) (ok bool) {
 		// no order-by
 		p.queue = append(p.queue, pair)
 	} else {
-		heap.Push(p, pair)
+		deheap.Push(p, pair)
 	}
 	size := pair.Src.Size()
 	if size > 0 {
@@ -129,7 +126,7 @@ func (p *pipe) Get(ctx context.Context) (pair fs.ObjectPair, ok bool) {
 		p.queue[0] = fs.ObjectPair{} // avoid memory leak
 		p.queue = p.queue[1:]
 	} else {
-		pair = heap.Pop(p).(fs.ObjectPair)
+		pair = deheap.Pop(p).(fs.ObjectPair)
 	}
 	size := pair.Src.Size()
 	if size > 0 {

fs/sync/pipe_test.go

@@ -1,6 +1,7 @@
 package sync
 
 import (
+	"container/heap"
 	"context"
 	"sync"
 	"sync/atomic"
@@ -12,6 +13,9 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
+// Check interface satisfied
+var _ heap.Interface = (*pipe)(nil)
+
 func TestPipe(t *testing.T) {
 	var queueLength int
 	var queueSize int64