Add a getter for ModuleListFile to SingletonContext

singleton_ctx.go

@@ -147,6 +147,10 @@ type SingletonContext interface {
 	// Fs returns a pathtools.Filesystem that can be used to interact with files.  Using the Filesystem interface allows
 	// the singleton to be used in build system tests that run against a mock filesystem.
 	Fs() pathtools.FileSystem
+
+	// ModuleListFile returns a string representation of the path to the file
+	// which lists blueprint files to parse.
+	ModuleListFile() string
 }
 
 var _ SingletonContext = (*singletonContext)(nil)
@@ -350,3 +354,7 @@ func (s *singletonContext) GlobWithDeps(pattern string,
 func (s *singletonContext) Fs() pathtools.FileSystem {
 	return s.context.fs
 }
+
+func (s *singletonContext) ModuleListFile() string {
+	return s.context.moduleListFile
+}