(local lume (require "lume"))

(fn string.fromhex [str]
  (str:gsub ".." (fn [cc] (string.char (tonumber cc 16)))))
(fn string.tohex [str]
  (str:gsub "." (fn [c] (string.format "%02X" (string.byte c)))))

(fn lo [v] (bit.band v 0xff))
(fn hi [v] (bit.band (bit.rshift v 8) 0xff))
(fn int8-to-bytes [i]
  (string.char (lo i)))
(fn int16-to-bytes [i]
  (string.char (lo i) (hi i)))

(fn reload [modname]
  (tset package.loaded modname nil)
  (require modname))

; lume.hotswap really assumes your module is a table
(fn hotswap [modname]
  (if (= (type (. package.loaded modname)) :table)
    (lume.hotswap modname)
    (reload modname)))

(fn mk-swappable-fn [table k]
  (fn [...] ((. table k) ...)))

(fn swappable [table]
  (local s {})
  (each [k v (pairs table)]
    (if (= (type v) :function)
      (tset s k (mk-swappable-fn table k))
      (tset s k v)))
  s)

(fn swappable-require [modname]
  (swappable (require modname)))

{: lo : hi : int8-to-bytes : int16-to-bytes : reload : hotswap : swappable :require swappable-require}