5 files changed, 23 insertions, 20 deletions
diff --git a/plumbing/object/commitnode.go b/plumbing/object/commitgraph/commitnode.go
index ce25487..e218d32 100644
--- a/plumbing/object/commitnode.go
+++ b/plumbing/object/commitgraph/commitnode.go
@@ -1,10 +1,11 @@
-package object
+package commitgraph
 
 import (
 	"io"
 	"time"
 
 	"gopkg.in/src-d/go-git.v4/plumbing"
+	"gopkg.in/src-d/go-git.v4/plumbing/object"
 	"gopkg.in/src-d/go-git.v4/plumbing/storer"
 )
 
@@ -14,7 +15,7 @@ type CommitNode interface {
 	// ID returns the Commit object id referenced by the commit graph node.
 	ID() plumbing.Hash
 	// Tree returns the Tree referenced by the commit graph node.
-	Tree() (*Tree, error)
+	Tree() (*object.Tree, error)
 	// CommitTime returns the Commiter.When time of the Commit referenced by the commit graph node.
 	CommitTime() time.Time
 	// NumParents returns the number of parents in a commit.
@@ -29,7 +30,7 @@ type CommitNode interface {
 	// Objects with newer generation are not reachable from objects of older generation.
 	Generation() uint64
 	// Commit returns the full commit object from the node
-	Commit() (*Commit, error)
+	Commit() (*object.Commit, error)
 }
 
 // CommitNodeIndex is generic interface encapsulating an index of CommitNode objects
@@ -59,7 +60,7 @@ func newParentgraphCommitNodeIter(node CommitNode) CommitNodeIter {
 // there are no more commits, it returns io.EOF.
 func (iter *parentCommitNodeIter) Next() (CommitNode, error) {
 	obj, err := iter.node.ParentNode(iter.i)
-	if err == ErrParentNotFound {
+	if err == object.ErrParentNotFound {
 		return nil, io.EOF
 	}
 	if err == nil {
diff --git a/plumbing/object/commitnode_graph.go b/plumbing/object/commitgraph/commitnode_graph.go
index ac790ab..bd54e18 100644
--- a/plumbing/object/commitnode_graph.go
+++ b/plumbing/object/commitgraph/commitnode_graph.go
@@ -1,4 +1,4 @@
-package object
+package commitgraph
 
 import (
 	"fmt"
@@ -6,6 +6,7 @@ import (
 
 	"gopkg.in/src-d/go-git.v4/plumbing"
 	"gopkg.in/src-d/go-git.v4/plumbing/format/commitgraph"
+	"gopkg.in/src-d/go-git.v4/plumbing/object"
 	"gopkg.in/src-d/go-git.v4/plumbing/storer"
 )
 
@@ -57,7 +58,7 @@ func (gci *graphCommitNodeIndex) Get(hash plumbing.Hash) (CommitNode, error) {
 	}
 
 	// Fallback to loading full commit object
-	commit, err := GetCommit(gci.s, hash)
+	commit, err := object.GetCommit(gci.s, hash)
 	if err != nil {
 		return nil, err
 	}
@@ -72,8 +73,8 @@ func (c *graphCommitNode) ID() plumbing.Hash {
 	return c.hash
 }
 
-func (c *graphCommitNode) Tree() (*Tree, error) {
-	return GetTree(c.gci.s, c.commitData.TreeHash)
+func (c *graphCommitNode) Tree() (*object.Tree, error) {
+	return object.GetTree(c.gci.s, c.commitData.TreeHash)
 }
 
 func (c *graphCommitNode) CommitTime() time.Time {
@@ -90,7 +91,7 @@ func (c *graphCommitNode) ParentNodes() CommitNodeIter {
 
 func (c *graphCommitNode) ParentNode(i int) (CommitNode, error) {
 	if i < 0 || i >= len(c.commitData.ParentIndexes) {
-		return nil, ErrParentNotFound
+		return nil, object.ErrParentNotFound
 	}
 
 	parent, err := c.gci.commitGraph.GetCommitDataByIndex(c.commitData.ParentIndexes[i])
@@ -117,14 +118,14 @@ func (c *graphCommitNode) Generation() uint64 {
 	return uint64(c.commitData.Generation)
 }
 
-func (c *graphCommitNode) Commit() (*Commit, error) {
-	return GetCommit(c.gci.s, c.hash)
+func (c *graphCommitNode) Commit() (*object.Commit, error) {
+	return object.GetCommit(c.gci.s, c.hash)
 }
 
 func (c *graphCommitNode) String() string {
 	return fmt.Sprintf(
 		"%s %s\nDate:   %s",
 		plumbing.CommitObject, c.ID(),
-		c.CommitTime().Format(DateFormat),
+		c.CommitTime().Format(object.DateFormat),
 	)
 }
diff --git a/plumbing/object/commitnode_object.go b/plumbing/object/commitgraph/commitnode_object.go
index 9ac42d2..2779a54 100644
--- a/plumbing/object/commitnode_object.go
+++ b/plumbing/object/commitgraph/commitnode_object.go
@@ -1,10 +1,11 @@
-package object
+package commitgraph
 
 import (
 	"math"
 	"time"
 
 	"gopkg.in/src-d/go-git.v4/plumbing"
+	"gopkg.in/src-d/go-git.v4/plumbing/object"
 	"gopkg.in/src-d/go-git.v4/plumbing/storer"
 )
 
@@ -13,7 +14,7 @@ import (
 // objectCommitNode implements the CommitNode interface.
 type objectCommitNode struct {
 	nodeIndex CommitNodeIndex
-	commit    *Commit
+	commit    *object.Commit
 }
 
 // NewObjectCommitNodeIndex returns CommitNodeIndex implementation that uses
@@ -23,7 +24,7 @@ func NewObjectCommitNodeIndex(s storer.EncodedObjectStorer) CommitNodeIndex {
 }
 
 func (oci *objectCommitNodeIndex) Get(hash plumbing.Hash) (CommitNode, error) {
-	commit, err := GetCommit(oci.s, hash)
+	commit, err := object.GetCommit(oci.s, hash)
 	if err != nil {
 		return nil, err
 	}
@@ -50,7 +51,7 @@ func (c *objectCommitNode) ID() plumbing.Hash {
 	return c.commit.ID()
 }
 
-func (c *objectCommitNode) Tree() (*Tree, error) {
+func (c *objectCommitNode) Tree() (*object.Tree, error) {
 	return c.commit.Tree()
 }
 
@@ -64,7 +65,7 @@ func (c *objectCommitNode) ParentNodes() CommitNodeIter {
 
 func (c *objectCommitNode) ParentNode(i int) (CommitNode, error) {
 	if i < 0 || i >= len(c.commit.ParentHashes) {
-		return nil, ErrParentNotFound
+		return nil, object.ErrParentNotFound
 	}
 
 	// Note: It's necessary to go through CommitNodeIndex here to ensure
@@ -84,6 +85,6 @@ func (c *objectCommitNode) Generation() uint64 {
 	return math.MaxUint64
 }
 
-func (c *objectCommitNode) Commit() (*Commit, error) {
+func (c *objectCommitNode) Commit() (*object.Commit, error) {
 	return c.commit, nil
 }
diff --git a/plumbing/object/commitnode_test.go b/plumbing/object/commitgraph/commitnode_test.go
index a295b8b..2a339c8 100644
--- a/plumbing/object/commitnode_test.go
+++ b/plumbing/object/commitgraph/commitnode_test.go
@@ -1,4 +1,4 @@
-package object
+package commitgraph
 
 import (
 	"path"
diff --git a/plumbing/object/commitnode_walker_ctime.go b/plumbing/object/commitgraph/commitnode_walker_ctime.go
index e55b4ad..f6a1b6a 100644
--- a/plumbing/object/commitnode_walker_ctime.go
+++ b/plumbing/object/commitgraph/commitnode_walker_ctime.go
@@ -1,4 +1,4 @@
-package object
+package commitgraph
 
 import (
 	"io"