refactor: move add and cat to the core

core/core.go

@@ -3,6 +3,7 @@ package core
 import (
 	"errors"
 	"fmt"
+	"io"
 
 	context "github.com/jbenet/go-ipfs/Godeps/_workspace/src/code.google.com/p/go.net/context"
 	b58 "github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/jbenet/go-base58"
@@ -18,6 +19,8 @@ import (
 	bsnet "github.com/jbenet/go-ipfs/exchange/bitswap/network"
 	"github.com/jbenet/go-ipfs/exchange/offline"
 	mount "github.com/jbenet/go-ipfs/fuse/mount"
+	importer "github.com/jbenet/go-ipfs/importer"
+	chunk "github.com/jbenet/go-ipfs/importer/chunk"
 	merkledag "github.com/jbenet/go-ipfs/merkledag"
 	namesys "github.com/jbenet/go-ipfs/namesys"
 	ic "github.com/jbenet/go-ipfs/p2p/crypto"
@@ -29,6 +32,8 @@ import (
 	pin "github.com/jbenet/go-ipfs/pin"
 	routing "github.com/jbenet/go-ipfs/routing"
 	dht "github.com/jbenet/go-ipfs/routing/dht"
+	uio "github.com/jbenet/go-ipfs/unixfs/io"
+	u "github.com/jbenet/go-ipfs/util"
 	ds2 "github.com/jbenet/go-ipfs/util/datastore2"
 	debugerror "github.com/jbenet/go-ipfs/util/debugerror"
 	eventlog "github.com/jbenet/go-ipfs/util/eventlog"
@@ -274,6 +279,34 @@ func (n *IpfsNode) Bootstrap(ctx context.Context, peers []peer.PeerInfo) error {
 	return nil
 }
 
+// TODO we may not want to add these methods to the core. Maybe they should be
+// defined as free functions in another package that use public fields on the
+// node.
+//
+// e.g. reader, err := unix.Cat(node)
+
+func (n *IpfsNode) Cat(k u.Key) (io.Reader, error) {
+	catterdag := n.DAG
+	nodeCatted, err := (&path.Resolver{catterdag}).ResolvePath(k.String())
+	if err != nil {
+		return nil, err
+	}
+	return uio.NewDagReader(nodeCatted, catterdag)
+}
+
+func (n *IpfsNode) Add(r io.Reader) (u.Key, error) {
+	nodeAdded, err := importer.BuildDagFromReader(
+		r,
+		n.DAG,
+		nil,
+		chunk.DefaultSplitter,
+	)
+	if err != nil {
+		return "", err
+	}
+	return nodeAdded.Key()
+}
+
 func (n *IpfsNode) loadID() error {
 	if n.Identity != "" {
 		return debugerror.New("identity already loaded")

test/epictest/core.go

 package epictest
 
 import (
-	"io"
-
 	context "github.com/jbenet/go-ipfs/Godeps/_workspace/src/code.google.com/p/go.net/context"
 	datastore "github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/jbenet/go-datastore"
 	sync "github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/jbenet/go-datastore/sync"
@@ -13,15 +11,10 @@ import (
 	exchange "github.com/jbenet/go-ipfs/exchange"
 	bitswap "github.com/jbenet/go-ipfs/exchange/bitswap"
 	bsnet "github.com/jbenet/go-ipfs/exchange/bitswap/network"
-	importer "github.com/jbenet/go-ipfs/importer"
-	chunk "github.com/jbenet/go-ipfs/importer/chunk"
 	merkledag "github.com/jbenet/go-ipfs/merkledag"
 	host "github.com/jbenet/go-ipfs/p2p/host"
 	peer "github.com/jbenet/go-ipfs/p2p/peer"
-	path "github.com/jbenet/go-ipfs/path"
 	dht "github.com/jbenet/go-ipfs/routing/dht"
-	uio "github.com/jbenet/go-ipfs/unixfs/io"
-	util "github.com/jbenet/go-ipfs/util"
 	"github.com/jbenet/go-ipfs/util/datastore2"
 	delay "github.com/jbenet/go-ipfs/util/delay"
 	eventlog "github.com/jbenet/go-ipfs/util/eventlog"
@@ -43,28 +36,6 @@ func (c *Core) Bootstrap(ctx context.Context, p peer.PeerInfo) error {
 	return c.IpfsNode.Bootstrap(ctx, []peer.PeerInfo{p})
 }
 
-func (c *Core) Cat(k util.Key) (io.Reader, error) {
-	catterdag := c.IpfsNode.DAG
-	nodeCatted, err := (&path.Resolver{catterdag}).ResolvePath(k.String())
-	if err != nil {
-		return nil, err
-	}
-	return uio.NewDagReader(nodeCatted, catterdag)
-}
-
-func (c *Core) Add(r io.Reader) (util.Key, error) {
-	nodeAdded, err := importer.BuildDagFromReader(
-		r,
-		c.IpfsNode.DAG,
-		nil,
-		chunk.DefaultSplitter,
-	)
-	if err != nil {
-		return "", err
-	}
-	return nodeAdded.Key()
-}
-
 func makeCore(ctx context.Context, rf RepoFactory) (*Core, error) {
 	node, err := rf(ctx)
 	if err != nil {