module providing "factory preset" functionality for norns scripts

example.lua

local factory = include('lib/factory')

function init()
  
  --- add parameters here...
  
  -- this will copy .pset and .pmap from dust/code/example/data/*, to dust/data/example/*, 
  -- (without overwriting existing files)
  factory.init()

  -- then this will load the default values (user or factory)
  params:default()
end 

factory.lua

local factory = {}

factory.init = function()
    local name = norns.state.name
    -- local data files (factory presets)
    local factory_data = norns.state.path .. 'data/'    
    local factory_pset = factory_data .. norns.state.name .. '.pset'
    local factory_pmap = factory_data .. norns.state.name .. '.pmap'
    -- top-level data files (user presets)
    local user_data = norns.state.data    
    local user_pset = user_data .. name .. '.pset'
    local user_pmap = user_data .. name .. '.pmap'

    local f = io.open(user_pset)
    if f == nil then
        os.execute("cp "..factory_pset.." "..user_pset)
    end
    f = io.open(user_pmap)
    if f == nil then
        os.execute("cp "..factory_pmap.." "..user_pmap)
    end
end

return factory