Exorcise Driver code from libpod/define

The libpod/define code should not import any large dependencies,
as it is intended to be structures and definitions only. It
included the libpod/driver package for information on the storage
driver, though, which brought in all of c/storage. Split the
driver package so that define has the struct, and thus does not
need to import Driver. And simplify the driver code while we're
at it.

Signed-off-by: Matthew Heon <mheon@redhat.com>

1 files changed, 7 insertions, 30 deletions

diff --git a/libpod/driver/driver.go b/libpod/driver/driver.go
index 85eda5a21..de71c1f6e 100644
--- a/libpod/driver/driver.go
+++ b/libpod/driver/driver.go
@@ -1,40 +1,17 @@
 package driver
 
 import (
-	cstorage "github.com/containers/storage"
+	"github.com/containers/podman/v2/libpod/define"
+	"github.com/containers/storage"
 )
 
-// Data handles the data for a storage driver
-type Data struct {
-	Name string            `json:"Name"`
-	Data map[string]string `json:"Data"`
-}
-
-// GetDriverName returns the name of the driver for the given store
-func GetDriverName(store cstorage.Store) (string, error) {
-	driver, err := store.GraphDriver()
-	if err != nil {
-		return "", err
-	}
-	return driver.String(), nil
-}
-
-// GetDriverMetadata returns the metadata regarding the driver for the layer in the given store
-func GetDriverMetadata(store cstorage.Store, layerID string) (map[string]string, error) {
+// GetDriverData returns information on a given store's running graph driver.
+func GetDriverData(store storage.Store, layerID string) (*define.DriverData, error) {
 	driver, err := store.GraphDriver()
 	if err != nil {
 		return nil, err
 	}
-	return driver.Metadata(layerID)
-}
-
-// GetDriverData returns the Data struct with information of the driver used by the store
-func GetDriverData(store cstorage.Store, layerID string) (*Data, error) {
-	name, err := GetDriverName(store)
-	if err != nil {
-		return nil, err
-	}
-	metaData, err := GetDriverMetadata(store, layerID)
+	metaData, err := driver.Metadata(layerID)
 	if err != nil {
 		return nil, err
 	}
@@ -42,8 +19,8 @@ func GetDriverData(store cstorage.Store, layerID string) (*Data, error) {
 		delete(metaData, "MergedDir")
 	}
 
-	return &Data{
-		Name: name,
+	return &define.DriverData{
+		Name: driver.String(),
 		Data: metaData,
 	}, nil
 }