1 files changed, 9 insertions, 1 deletions

diff --git a/scm.go b/scm.go
index 7e193b8..ac708d0 100644
--- a/scm.go
+++ b/scm.go
@@ -6,12 +6,20 @@ package spdxconv
 // sourceCodeManagement define the interface for SCM tools.
 type sourceCodeManagement interface {
 	IsIgnored(path string) bool
+	LogFollow(path, format string) ([]string, error)
 }
 
 // noSCM is a type to indicate working directory without SCM.
 // It always return false on IsIgnored.
-type noSCM struct{}
+type noSCM struct {
+}
+
+var defaultNoSCM = &noSCM{}
 
 func (scm *noSCM) IsIgnored(path string) bool {
 	return false
 }
+
+func (scm *noSCM) LogFollow(path, format string) ([]string, error) {
+	return nil, nil
+}