1 files changed, 19 insertions, 0 deletions
diff --git a/libs/ardour/file_source.cc b/libs/ardour/file_source.cc
index 84d4f3043f..ae7fbdc38c 100644
--- a/libs/ardour/file_source.cc
+++ b/libs/ardour/file_source.cc
@@ -62,6 +62,8 @@ FileSource::FileSource (Session& session, DataType type, const string& path, con
         , _origin (origin)
 {
 	set_within_session_from_path (path);
+
+        prevent_deletion ();
 }
 
 FileSource::FileSource (Session& session, const XMLNode& node, bool /*must_exist*/)
@@ -75,6 +77,23 @@ FileSource::FileSource (Session& session, const XMLNode& node, bool /*must_exist
 
 	_path = _name;
 	_within_session = true;
+
+        prevent_deletion ();
+}
+
+void
+FileSource::prevent_deletion ()
+{
+        /* if this file already exists, it cannot be removed, ever
+         */
+        
+        if (Glib::file_test (_path, Glib::FILE_TEST_EXISTS)) {
+                if (!(_flags & Destructive)) {
+                        mark_immutable ();
+                } else {
+                        _flags = Flag (_flags & ~(Removable|RemovableIfEmpty|RemoveAtDestroy));
+                }
+        }
 }
 
 bool