dotfiles/mail/.config/imapfilter/filters/rollup-dump.lua

function sendToFolder(folderFrom, folderTo, senders)
  local messages = folderFrom:select_all()
  for _, sender in pairs(senders) do
    local filtered=messages:contain_from(sender)
    filtered:mark_seen()
    filtered:move_messages(folderTo)
  end
end

-- will set filters to be grabbed from XDG-compliant filter directory
-- can be overridden with env var IMAPFILTER_ROLLUPFILE
function getRollupFile(fname)
  local f
  local fname=fname or "rollup.txt"
  if os.getenv("IMAPFILTER_ROLLUPFILE") then
    f=os.getenv("IMAPFILTER_ROLLUPFILE")
  elseif os.getenv("XDG_DATA_HOME") then
    f=os.getenv("XDG_DATA_HOME") .. "/imapfilter/" .. fname
  else
    f=os.getenv("HOME") .. "/.local/share/imapfilter/" .. fname
  end
  return f
end

function getSenderList(rollupfile)
  local rollupSenders={}

  local file = io.open(rollupfile)
  if file then
    for line in file:lines() do
      table.insert(rollupSenders, line)
    end
  else
    print("ERROR: rollup did not find rollup.txt file containing mail addresses at " .. rollupfile or "" )
  end
  return rollupSenders
end

sendToFolder (
  accounts.gmail["Inbox"],
  accounts.gmail["Dump"],
  getSenderList(getRollupFile())
  )