fix: update go-merkledag to use new Walk function

go.mod

@@ -5,19 +5,19 @@ go 1.12
 require (
 	github.com/btcsuite/btcd v0.0.0-20190605094302-a0d1e3e36d50 // indirect
 	github.com/cenkalti/backoff v2.1.1+incompatible
-	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/ipfs/go-block-format v0.0.2
 	github.com/ipfs/go-cid v0.0.2
+	github.com/ipfs/go-cidutil v0.0.2
 	github.com/ipfs/go-datastore v0.0.5
 	github.com/ipfs/go-ipfs-blockstore v0.0.1
 	github.com/ipfs/go-ipfs-blocksutil v0.0.1
 	github.com/ipfs/go-ipfs-routing v0.1.0
+	github.com/ipfs/go-ipld-format v0.0.2
 	github.com/ipfs/go-log v0.0.1
+	github.com/ipfs/go-merkledag v0.2.0
 	github.com/ipfs/go-verifcid v0.0.1
 	github.com/libp2p/go-libp2p-core v0.0.3
 	github.com/libp2p/go-libp2p-testing v0.0.4
-	github.com/mattn/go-colorable v0.1.2 // indirect
-	github.com/opentracing/opentracing-go v1.1.0 // indirect
 	golang.org/x/crypto v0.0.0-20190611184440-5c40567a22f8 // indirect
 	golang.org/x/sys v0.0.0-20190610200419-93c9922d18ae // indirect
 )

simple/reprovide.go

@@ -213,10 +213,8 @@ func pinSet(ctx context.Context, pinning Pinner, dag ipld.DAGService, onlyRoots
 		}
 
 		for _, key := range pinning.RecursiveKeys() {
-			set.Visitor(ctx)(key)
-
 			if !onlyRoots {
-				err := merkledag.EnumerateChildren(ctx, merkledag.GetLinksWithDAG(dag), key, set.Visitor(ctx))
+				err := merkledag.Walk(ctx, merkledag.GetLinksWithDAG(dag), key, set.Visitor(ctx))
 				if err != nil {
 					logR.Errorf("reprovide indirect pins: %s", err)
 					return