Move deps from _workspace/ to vendor/

godep restore
pushd $GOPATH/src/github.com/appc/spec
git co master
popd
go get go4.org/errorutil
rm -rf Godeps
godep save ./...
git add vendor
git add -f $(git ls-files --other vendor/)
git co -- Godeps/LICENSES Godeps/.license_file_state Godeps/OWNERS

vendor/github.com/hashicorp/raft/snapshot.go

@@ -0,0 +1,40 @@
+package raft
+
+import (
+	"io"
+)
+
+// SnapshotMeta is for metadata of a snapshot.
+type SnapshotMeta struct {
+	ID    string // ID is opaque to the store, and is used for opening
+	Index uint64
+	Term  uint64
+	Peers []byte
+	Size  int64
+}
+
+// SnapshotStore interface is used to allow for flexible implementations
+// of snapshot storage and retrieval. For example, a client could implement
+// a shared state store such as S3, allowing new nodes to restore snapshots
+// without steaming from the leader.
+type SnapshotStore interface {
+	// Create is used to begin a snapshot at a given index and term,
+	// with the current peer set already encoded.
+	Create(index, term uint64, peers []byte) (SnapshotSink, error)
+
+	// List is used to list the available snapshots in the store.
+	// It should return then in descending order, with the highest index first.
+	List() ([]*SnapshotMeta, error)
+
+	// Open takes a snapshot ID and provides a ReadCloser. Once close is
+	// called it is assumed the snapshot is no longer needed.
+	Open(id string) (*SnapshotMeta, io.ReadCloser, error)
+}
+
+// SnapshotSink is returned by StartSnapshot. The FSM will Write state
+// to the sink and call Close on completion. On error, Cancel will be invoked.
+type SnapshotSink interface {
+	io.WriteCloser
+	ID() string
+	Cancel() error
+}