Implement cleanup command for emptying trash / removing old versions of files

fs/fs.go

@@ -273,6 +273,15 @@ type PutUncheckeder interface {
 	PutUnchecked(in io.Reader, src ObjectInfo) (Object, error)
 }
 
+// CleanUpper is an optional interfaces for Fs
+type CleanUpper interface {
+	// CleanUp the trash in the Fs
+	//
+	// Implement this if you have a way of emptying the trash or
+	// otherwise cleaning up old versions of files.
+	CleanUp() error
+}
+
 // ObjectsChan is a channel of Objects
 type ObjectsChan chan Object
 

fs/operations.go

@@ -1379,3 +1379,12 @@ func listToChan(list *Lister) ObjectsChan {
 	}()
 	return o
 }
+
+// CleanUp removes the trash for the Fs
+func CleanUp(f Fs) error {
+	fc, ok := f.(CleanUpper)
+	if !ok {
+		return errors.Errorf("%v doesn't support cleanup", f)
+	}
+	return fc.CleanUp()
+}