store: new API CleanupStagedLayer

It uses the diff output as input and callers are not expected to know
about the Target directory.

Signed-off-by: Giuseppe Scrivano <[email protected]>

store.go

@@ -335,13 +335,17 @@ type Store interface {
 	ApplyDiffFromStagingDirectory(to, stagingDirectory string, diffOutput *drivers.DriverWithDifferOutput, options *drivers.ApplyDiffWithDifferOpts) error
 
 	// CleanupStagingDirectory cleanups the staging directory.  It can be used to cleanup the staging directory on errors
+	// Deprecated: it will be removed soon.  Use CleanupStagedLayer instead.
 	CleanupStagingDirectory(stagingDirectory string) error
 
 	// ApplyStagedLayer combines the functions of CreateLayer and ApplyDiffFromStagingDirectory,
 	// marking the layer for automatic removal if applying the diff fails
 	// for any reason.
 	ApplyStagedLayer(args ApplyStagedLayerOptions) (*Layer, error)
 
+	// CleanupStagedLayer cleanups the staging directory.  It can be used to cleanup the staging directory on errors
+	CleanupStagedLayer(diffOutput *drivers.DriverWithDifferOutput) error
+
 	// DifferTarget gets the path to the differ target.
 	DifferTarget(id string) (string, error)
 
@@ -3027,6 +3031,13 @@ func (s *store) CleanupStagingDirectory(stagingDirectory string) error {
 	return err
 }
 
+func (s *store) CleanupStagedLayer(diffOutput *drivers.DriverWithDifferOutput) error {
+	_, err := writeToLayerStore(s, func(rlstore rwLayerStore) (struct{}, error) {
+		return struct{}{}, rlstore.CleanupStagingDirectory(diffOutput.Target)
+	})
+	return err
+}
+
 func (s *store) ApplyDiffWithDiffer(to string, options *drivers.ApplyDiffWithDifferOpts, differ drivers.Differ) (*drivers.DriverWithDifferOutput, error) {
 	return writeToLayerStore(s, func(rlstore rwLayerStore) (*drivers.DriverWithDifferOutput, error) {
 		if to != "" && !rlstore.Exists(to) {