How to import audio from sources with Lua

[toxonic]

What would be the way to go to import an audio file from the Sources (in the Editor List) to an existing audio track in Lua?
Thanks in advance!

[x42 (Robin Gareus)]

Does this help?

ardour { ["type"] = "Snippet", name = "Add all Sources to a new Track" }

function factory () return function () 

  -- default track output channel count (= master bus input count)
  local n_chan_out  = 2
  if not Session:master_out():isnil() then
    n_chan_out = Session:master_out():n_inputs ():n_audio ()
  end

  -- create a stereo track
  local newtracks = Session:new_audio_track (2, n_chan_out, nil, 1, "All Audio Sources", ARDOUR.PresentationInfo.max_order, ARDOUR.TrackMode.Normal, true)
  -- get playlist of the new track
  local playlist = newtracks:front():playlist()

  -- add 1st region at the start of the session
  local position = Temporal.timepos_t(0)

  -- get all regions in this session...
  local rl = ARDOUR.RegionFactory.regions()

  -- ...and iterate over them
  for _, r in rl:iter() do
    -- only look for "sources", which are represented by "whole file regions"
    -- and filter by audio-regions
    if r:whole_file() and not r:to_audioregion():isnil() then
      print (r:name())
      -- add region to the track's playlist
      playlist:add_region (r, position, 1, false)
      position = position + r:length ()
    end
  end

end end

[toxonic]

Thank you, mate, that’s a great help to me!
I didn’t know, where to start.
there are still some uncertainties to me:

1. What does the _, at the beginning of the for-loop do?
2. I want to add a region with a specific name from the sources, so I changed the for-loop like this:

for _, r in rl:iter() do    
                -- Check regions for a specific name...
				if r:name() == audioTrackname then -- audioTrackname is a variable containing the search name
                -- ...and add it to the playlist
				playlist:add_region (r, Temporal.timepos_t(0), 1, false)
				end
			end

But in case, there are multiple regions with the same name, I need a second condition that picks the most current region with that name, which I then add to the playlist. Any hints for this?

3. A bit off-topic, but is there a way to embed a Lua scrtipt into Ardours context menus?

EDIT: Okay, I figured out, that there are tables in Lua, which differ from arrays in regard of indexing their elements. So the undrescore represents the index of the regionlist table?