Lua script to save a snapshot after export

scripts/_post_export_save_hook.lua

@@ -0,0 +1,26 @@
+ardour {
+	["type"]    = "EditorHook",
+	name        = "Save Snapshot after Export",
+	author      = "Ardour Lua Task Force",
+	description = "Snapshot after Export",
+}
+
+-- subscribe to signals
+-- http://manual.ardour.org/lua-scripting/class_reference/#LuaSignal.LuaSignal
+function signals ()
+	s = LuaSignal.Set()
+	s:add ({[LuaSignal.Exported] = true})
+	return s
+end
+
+-- create callback functions
+function factory ()
+	-- callback function which invoked when signal is emitted
+	return function (signal, ref, ...)
+		-- 'Exported' passes 2 strings: current time-span name, path to exported file
+		-- (see C++ libs/ardour/export_handler.cc  Session::Exported )
+		local timespan_name, file_path = ...
+		-- save session -- http://manual.ardour.org/lua-scripting/class_reference/#ARDOUR:Session
+		Session:save_state ("export-" .. timespan_name, false, false, false)
+	end
+end