lua/readline.lua

   1 local LN = require('linenoise')
   2
   3 local M = {}
   4
   5 local history_loaded = false
   6 local history_file = os.getenv("HOME") .. "/.mal-history"
   7
   8 M.raw = false
   9
  10 function M.readline(prompt)
  11     if not history_loaded then
  12         history_loaded = true
  13         xpcall(function()
  14             for line in io.lines(history_file) do
  15                 LN.historyadd(line)
  16             end
  17         end, function(exc)
  18             return true -- ignore the error
  19         end)
  20     end
  21
  22     if M.raw then
  23         io.write(prompt); io.flush();
  24         line = io.read()
  25     else
  26         line = LN.linenoise(prompt)
  27     end
  28     if line then
  29         LN.historyadd(line)
  30         xpcall(function()
  31             local f = io.open(history_file, "a")
  32             f:write(line.."\n")
  33             f:close()
  34         end, function(exc)
  35             return true -- ignore the error
  36         end)
  37     end
  38     return line
  39 end
  40
  41 return M