2 files changed, 18 insertions, 0 deletions
diff --git a/storage/filesystem/storage.go b/storage/filesystem/storage.go
index 27dd07f..9895507 100644
--- a/storage/filesystem/storage.go
+++ b/storage/filesystem/storage.go
@@ -11,6 +11,8 @@ import (
 // standard git format (this is, the .git directory). Zero values of this type
 // are not safe to use, see the NewStorage function below.
 type Storage struct {
+	fs billy.Filesystem
+
 	ObjectStorage
 	ReferenceStorage
 	IndexStorage
@@ -28,6 +30,8 @@ func NewStorage(fs billy.Filesystem) (*Storage, error) {
 	}
 
 	return &Storage{
+		fs: fs,
+
 		ObjectStorage:    o,
 		ReferenceStorage: ReferenceStorage{dir: dir},
 		IndexStorage:     IndexStorage{dir: dir},
@@ -36,3 +40,8 @@ func NewStorage(fs billy.Filesystem) (*Storage, error) {
 		ModuleStorage:    ModuleStorage{dir: dir},
 	}, nil
 }
+
+// Filesystem returns the underlying filesystem
+func (s *Storage) Filesystem() billy.Filesystem {
+	return s.fs
+}
diff --git a/storage/filesystem/storage_test.go b/storage/filesystem/storage_test.go
index e398d22..7300de7 100644
--- a/storage/filesystem/storage_test.go
+++ b/storage/filesystem/storage_test.go
@@ -6,6 +6,7 @@ import (
 	"srcd.works/go-git.v4/storage/test"
 
 	. "gopkg.in/check.v1"
+	"srcd.works/go-billy.v1/memfs"
 	"srcd.works/go-billy.v1/osfs"
 )
 
@@ -23,3 +24,11 @@ func (s *StorageSuite) SetUpTest(c *C) {
 
 	s.BaseStorageSuite = test.NewBaseStorageSuite(storage)
 }
+
+func (s *StorageSuite) TestFilesystem(c *C) {
+	fs := memfs.New()
+	storage, err := NewStorage(fs)
+	c.Assert(err, IsNil)
+
+	c.Assert(storage.Filesystem(), Equals, fs)
+}