dotfiles/mail/.config/imapfilter/config.lua

-- According to the IMAP specification, when trying to write a message
-- to a non-existent mailbox, the server must send a hint to the client,
-- whether it should create the mailbox and try again or not. However
-- some IMAP servers don't follow the specification and don't send the
-- correct response code to the client. By enabling this option the
-- client tries to create the mailbox, despite of the server's response.
-- This variable takes a boolean as a value.  Default is “false”.
options.create = true
-- By enabling this option new mailboxes that were automatically created,
-- get auto subscribed
options.subscribe = true
-- How long to wait for servers response.
options.timeout = 120

accounts = loadfile(os.getenv("HOME") .. "/.config/imapfilter/accounts.lua")()

-- will set filters to be grabbed from XDG-compliant filter directory
-- can be overridden with env var IMAPFILTER_FILTERDIR
function getFilterDir()
  -- -- set directory for imapfilter files
  local imapfilterdir
  if os.getenv("IMAPFILTER_FILTERDIR") then
    imapfilterdir=os.getenv("IMAPFILTER_FILTERDIR")
  elseif os.getenv("XDG_CONFIG_HOME") then
    imapfilterdir=os.getenv("XDG_CONFIG_HOME") .. "/imapfilter/filters"
  else
    imapfilterdir=os.getenv("HOME") .. "/.config/imapfilter/filters"
  end
  return imapfilterdir
end

local filters = {}
-- dirlist, from https://stackoverflow.com/a/25266573
function applyFilters(dir)
  local p = io.popen('find "'..dir..'" -type f')   --Open directory look for files, save data in p. By giving '-type f' as parameter, it returns all files.
  for file in p:lines() do                         --Loop through all files
    loadfile(file)()
  end
end

applyFilters(getFilterDir())