--[[
  MIDI Grid: loop the bar the cursor is in.

  Sample-accurate at the bar line, because REAPER's audio engine owns the
  boundary rather than a polling loop -- so the next bar's downbeat never
  leaks in, at any tempo. Repeats until you press Space.
]]
local dir = ({ reaper.get_action_context() })[2]:match("@?(.*[\\/])")
local G = dofile(dir .. "midigrid_lib.lua")

local bar = G.loopBar()
G.say("Looping bar " .. bar)