return function(app,argv)
  foreach( app.cmd, function(k,v)
    io.write( app.bin .. " " .. k .. "\t\t # " .. v.info .. "\n")
  end)
  io.write("\nexample: " .. app.bin .. " title='My XRForge experiences'\n\n")
  io.write("example content: unzip result/bin/xrforge.com myverse/*\n\n")
  io.write("Flags:\n\n")
  foreach( app.opts, function(k,v)
    if not k:match("/") and not k:match("^help") and not k:match("updated") then
      io.write( "  " .. k .. "='" .. v:gsub("\n","") .. "'\n")
    end
  end)
  io.write("\n> NOTE: flags override flags in xrforge.lua configfile]\n")
  os.exit()
end