2 ["type"] = "EditorHook",
3 name = "Periodically Save Snapshot",
4 author = "Ardour Lua Task Force",
5 description = "Save a session-snapshot peridocally (every 15mins) named after the current date-time",
8 -- subscribe to signals
9 -- http://manual.ardour.org/lua-scripting/class_reference/#LuaSignal.LuaSignal
11 return LuaSignal.Set():add ({[LuaSignal.LuaTimerS] = true})
14 -- create callback function
16 local _last_snapshot_time = 0 -- persistent variable
17 local _snapshot_interval = 60 * 15 -- 15 minutes
19 -- callback function which invoked when signal is emitted, every 100ms
20 return function (signal, ref, ...)
22 local now = os.time (); -- unix-time, seconds since 1970
24 -- skip initial save when script is loaded
25 if (_last_snapshot_time == 0) then
26 _last_snapshot_time = now;
30 if (now > _last_snapshot_time + _snapshot_interval) then
32 -- don't save while recording, may interfere with recording
33 if Session:actively_recording() then
34 -- queue 30 sec after rec-stop
35 _last_snapshot_time = now - _snapshot_interval + 30
39 _last_snapshot_time = now
40 -- format date-time (avoid colon)
41 local snapshot_name = os.date ("%Y-%m-%d %H.%M.%S", now)
42 -- save session -- http://manual.ardour.org/lua-scripting/class_reference/#ARDOUR:Session
43 Session:save_state ("backup " .. snapshot_name, false, false, false)