local diskpart = require "diskpart"
local vcomponent = require "vcomponent"
local partman = {}
local run = true

local function attach(addr)
 for k,v in ipairs(diskpart.getPartitions(addr)) do
  if v[4] > 0 then
   syslog(string.format("Registering vcomponent for partition %s/%i",addr,k))
   vcomponent.register(string.format("%s/%i",addr,k), "partition", diskpart.proxyPartition(addr, k))
  end
 end
end

function partman.start()
 run = true
 os.spawn(function()
  for a,_ in component.list("drive") do
   attach(a)
  end
  while run do
   local tE = {coroutine.yield()}
   if tE[1] == "component_added" and tE[3] == "drive" then
    attach(tE[2])
   elseif tE[1] == "component_removed" and tE[3] == "drive" then
    for a,t in component.list("partition") do
     if a:sub(1,tE[2]:len()) == tE[2] then
      syslog("Removing partition vcomponent "..a)
      vcomponent.unregister(a)
     end
    end
   end
  end
 end, "partman")
end
function partman.stop()
 run = false
end

return partman