Something

local unitList = {"armrock","armflea","armjeth","armfav","tawf013","armjanus","armsam","armaak","armyork","armroy","corstorm","corcrash","corfav","corwolv","corlevlr","cormist","corsent","coraak"}

-- Edit the above list to customize the units that will be set on hold position.


local holdUnits = {}
  
function widget:GetInfo()
  return {
    name      = "DontMove",
    desc      = "Sets units defined in cmd_dontmove.lua on hold position.",
    author    = "quantum",
    date      = "Jan 8, 2007",
    license   = "GNU GPL, v2 or later",
    layer     = 0,
    enabled   = false  --  loaded by default?
  }
end

include("spring.h.lua")

function widget:Initialize() 
  for i, v in pairs(unitList) do  --Rearrange unitlist for better performance.
    holdUnits[v] = true
  end
end

function widget:UnitFromFactory(unitID, unitDefID, unitTeam)
  local ud = UnitDefs[unitDefID]
   if ((ud ~= nil) and (unitTeam == Spring.GetMyTeamID())) then
    for i, v in pairs(holdUnits) do
      if (holdUnits[ud.name]) then
        Spring.GiveOrderToUnit(unitID, CMD_MOVE_STATE, { 0 }, {})
      end
    end
  end
end