Multiline syntax - umnikos/hopper.lua GitHub Wiki

Except in simple scenarios, a single hopper command rarely suffices. In earlier versions of hopper.lua the standard way to have multiple hopper commands run simultaneously was to have each one open in a separate tab with bg. This was not ideal, so the multiline command syntax was created.

In short, you can type out several hopper commands and separate them each with / to have multiple commands run on a single instance. This is a necessity if you want to use the -storage flag, but even if you don't it leads to a cleaner setup.

Example: hopper left right / top bottom - Moves items from the left chest to the right chest, and from the top chest to the bottom chest.

Options can either be per-command or global options. Only a few options are global, and they must be supplied to the first command in the list, otherwise they might be ignored. The list of global options is:

• -sleep
• -once
• -quiet
• -storage
• -alias

Good practices include using [ and ](/umnikos/hopper.lua/wiki/-and-) to make a multiline string, putting each hopper command on its own line, and reserving the first command purely for global options.

Example: A very simple bulk storage setup, one chest acts as input and another one as output. This is useful for quickly setting up buffers for farms that see irregular production and/or irregular demand.

shell.openTab([[hopper -sleep 5
  -alias in *chest*_5938
  -alias out *chest*_5939
  -storage store *barrel*
  / in store
  / store out
]])