chore(util) remove forward

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

util/async/forward.go

@@ -1,34 +0,0 @@
-package async
-
-import (
-	context "github.com/jbenet/go-ipfs/Godeps/_workspace/src/code.google.com/p/go.net/context"
-	"github.com/jbenet/go-ipfs/blocks"
-	u "github.com/jbenet/go-ipfs/util"
-)
-
-var log = u.Logger("async")
-
-// ForwardN forwards up to |num| blocks to the returned channel.
-func ForwardN(ctx context.Context, in <-chan *blocks.Block, num int) <-chan *blocks.Block {
-	out := make(chan *blocks.Block)
-	go func() {
-		defer close(out)
-		for i := 0; i < num; i++ {
-			select {
-			case block, ok := <-in:
-				if !ok {
-					log.Error("Forwarder exiting early!")
-					return // otherwise nil value is forwarded to output
-				}
-				select {
-				case out <- block:
-				case <-ctx.Done():
-					return
-				}
-			case <-ctx.Done():
-				return
-			}
-		}
-	}()
-	return out
-}

util/async/forward_test.go

@@ -1,58 +0,0 @@
-package async
-
-import (
-	"testing"
-
-	context "github.com/jbenet/go-ipfs/Godeps/_workspace/src/code.google.com/p/go.net/context"
-	"github.com/jbenet/go-ipfs/blocks"
-)
-
-func TestForwardNThenClose(t *testing.T) {
-	const n = 2
-	const buf = 2 * n
-	in := make(chan *blocks.Block, buf)
-	ctx := context.Background()
-	out := ForwardN(ctx, in, n)
-
-	for i := 0; i < buf; i++ {
-		in <- blocks.NewBlock([]byte(""))
-	}
-
-	for i := 0; i < n; i++ {
-		_ = <-out
-	}
-
-	_, ok := <-out // closed
-	if !ok {
-		return
-	}
-	t.Fatal("channel still open after receiving n blocks")
-}
-
-func TestCloseInput(t *testing.T) {
-	const n = 2
-	in := make(chan *blocks.Block, 0)
-	ctx := context.Background()
-	out := ForwardN(ctx, in, n)
-
-	close(in)
-	_, ok := <-out // closed
-	if !ok {
-		return
-	}
-	t.Fatal("input channel closed, but output channel not")
-
-}
-
-func TestContextClosedWhenBlockingOnInput(t *testing.T) {
-	const n = 1 // but we won't ever send a block
-	ctx, cancel := context.WithCancel(context.Background())
-	out := ForwardN(ctx, make(chan *blocks.Block), n)
-
-	cancel() // before sending anything
-	_, ok := <-out
-	if !ok {
-		return
-	}
-	t.Fail()
-}