address comments from PR

importer/importer.go

@@ -95,6 +95,8 @@ func BuildDagFromFile(fpath string, ds dag.DAGService, mp pin.ManualPinner) (*da
 
 func BuildDagFromReader(r io.Reader, ds dag.DAGService, mp pin.ManualPinner, spl chunk.BlockSplitter) (*dag.Node, error) {
 	blkChan := spl.Split(r)
+
+	// grab first block, it will go in the index MultiBlock (faster io)
 	first := <-blkChan
 	root := &dag.Node{}
 
@@ -104,13 +106,14 @@ func BuildDagFromReader(r io.Reader, ds dag.DAGService, mp pin.ManualPinner, spl
 		mbf.AddBlockSize(uint64(len(blk)))
 		node := &dag.Node{Data: ft.WrapData(blk)}
 		nk, err := ds.Add(node)
-		if mp != nil {
-			mp.PinWithMode(nk, pin.Indirect)
-		}
 		if err != nil {
 			return nil, err
 		}
 
+		if mp != nil {
+			mp.PinWithMode(nk, pin.Indirect)
+		}
+
 		// Add a link to this node without storing a reference to the memory
 		err = root.AddNodeLinkClean("", node)
 		if err != nil {

importer/importer_test.go

@@ -9,11 +9,10 @@ import (
 	"os"
 	"testing"
 
-	ds "github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/jbenet/go-datastore"
-	bsrv "github.com/jbenet/go-ipfs/blockservice"
 	"github.com/jbenet/go-ipfs/importer/chunk"
-	dag "github.com/jbenet/go-ipfs/merkledag"
 	uio "github.com/jbenet/go-ipfs/unixfs/io"
+	u "github.com/jbenet/go-ipfs/util"
+	"github.com/jbenet/go-ipfs/util/testutil"
 )
 
 // NOTE:
@@ -82,15 +81,10 @@ func testFileConsistency(t *testing.T, bs chunk.BlockSplitter, nbytes int) {
 
 func TestBuilderConsistency(t *testing.T) {
 	nbytes := 100000
-	dstore := ds.NewMapDatastore()
-	bserv, err := bsrv.NewBlockService(dstore, nil)
-	if err != nil {
-		t.Fatal(err)
-	}
-	dagserv := dag.NewDAGService(bserv)
 	buf := new(bytes.Buffer)
-	io.CopyN(buf, rand.Reader, int64(nbytes))
+	io.CopyN(buf, u.NewTimeSeededRand(), int64(nbytes))
 	should := dup(buf.Bytes())
+	dagserv := testutil.GetDAGServ(t)
 	nd, err := BuildDagFromReader(buf, dagserv, nil, chunk.DefaultSplitter)
 	if err != nil {
 		t.Fatal(err)