This is a tool to make custom REPL modes in Julia.

First, generate a new REPL Prompt:

c = generate_custom_repl("custom> ") # Many kwargs available, see source

You can then register statements and associate them with functions

register!(c, "print"=>println)

Finally, add the Prompt to the REPL list, choose a prefix and you're good to go.

add_repl_mode(c, raw"$")

julia> $
custom> print someword
someword