add a cool lua repl

lib/lua-repl/rep.lua

@@ -0,0 +1,41 @@
+#!/usr/bin/env lua
+
+-- Copyright (c) 2011-2015 Rob Hoelz <rob@hoelz.ro>
+--
+-- Permission is hereby granted, free of charge, to any person obtaining a copy of
+-- this software and associated documentation files (the "Software"), to deal in
+-- the Software without restriction, including without limitation the rights to
+-- use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+-- the Software, and to permit persons to whom the Software is furnished to do so,
+-- subject to the following conditions:
+--
+-- The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+--
+-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+-- FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+-- COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+-- IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+-- CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+-- Not as cool a name as re.pl, but I tried.
+
+local repl          = require 'repl.console'
+local rcfile_loaded = repl:loadplugin 'rcfile'
+
+if not rcfile_loaded then
+  local has_linenoise = pcall(require, 'linenoise')
+
+  if has_linenoise then
+    repl:loadplugin 'linenoise'
+  else
+    pcall(repl.loadplugin, repl, 'rlwrap')
+  end
+
+  repl:loadplugin 'history'
+  repl:loadplugin 'completion'
+  repl:loadplugin 'autoreturn'
+end
+
+print('Lua REPL ' .. tostring(repl.VERSION))
+repl:run()