#!/usr/bin/env lua
+local sig = require 'signal'
local irc = require 'irc'
irc.DEBUG = true
local nick = "luabot"
-local pre_code = [[
-io = nil
-os = nil
-loadfile = nil
-dofile = nil
-package = nil
-require = nil
-module = nil
-debug = nil
-]]
+local channel = "#doytest"
+local network = "irc.freenode.org"
-irc.register_callback("connect", function()
- irc.join("#doytest")
-end)
+local envs = {}
-irc.register_callback("channel_msg", function(channel, from, message)
- local for_me, code = message:match("^(" .. nick .. ". )(.*)")
- if for_me then
+local function create_env()
+ return {
+ _VERSION = _VERSION,
+ assert = assert,
+ collectgarbage = collectgarbage,
+ error = error,
+ getfenv = getfenv,
+ getmetatable = getmetatable,
+ ipairs = ipairs,
+ loadstring = loadstring,
+ next = next,
+ pairs = pairs,
+ pcall = pcall,
+ rawequal = rawequal,
+ rawget = rawget,
+ rawset = rawset,
+ select = select,
+ setfenv = setfenv,
+ setmetatable = setmetatable,
+ tonumber = tonumber,
+ tostring = tostring,
+ type = type,
+ unpack = unpack,
+ xpcall = xpcall,
+ coroutine = coroutine,
+ math = math,
+ string = string,
+ table = table,
+ }
+end
+
+local commands = {
+ eval = function(target, from, code)
code = code:gsub("^=", "return ")
- local fn, err = loadstring(pre_code .. code)
+ local fn, err = loadstring(code)
if not fn then
- irc.say(channel.name, from .. ": Error loading code: " .. err)
+ irc.say(target, from .. ": Error loading code: " .. code .. err:match(".*(:.-)$"))
return
else
+ setfenv(fn, envs[from])
+ sig.signal("ALRM", error)
+ sig.alarm(5)
local result = {pcall(fn)}
+ sig.alarm(0)
+ sig.signal("ALRM", "default")
local success = table.remove(result, 1)
if not success then
- irc.say(channel.name, from .. ": Error running code: " .. result[1])
+ local err = result[1]:match(".*: (.-)$")
+ if err == "ALRM" then err = "timed out" end
+ irc.say(target, from .. ": Error running code: " .. code ..
+ ": " .. err)
else
- irc.say(channel.name, from .. ": " .. table.concat(result, ", "))
+ if result[1] == nil then
+ irc.say(target, from .. ": nil")
+ else
+ for i, v in ipairs(result) do result[i] = tostring(v) end
+ irc.say(target, from .. ": " .. table.concat(result, ", "))
+ end
end
end
+ end,
+ clear = function(target, from)
+ irc.say(target, from .. ": Clearing your environment")
+ envs[from] = create_env()
+ end,
+ help = function(target, from, arg)
+ if arg == "" or not arg then
+ irc.say(target, from .. ": Commands: !clear, !eval, !help")
+ elseif arg == "eval" then
+ irc.say(target, from .. ": Evaluates a Lua statement in your own persistent environment")
+ elseif arg == "clear" then
+ irc.say(target, from .. ": Clears your personal environment")
+ end
+ end
+}
+
+irc.register_callback("connect", function()
+ irc.join(channel)
+end)
+
+irc.register_callback("channel_msg", function(channel, from, message)
+ message = message:gsub("^" .. nick .. "[:,>] ", "!eval ")
+ local is_cmd, cmd, arg = message:match("^(!)([%w_]+) ?(.-)$")
+ if is_cmd and commands[cmd] then
+ envs[from] = envs[from] or create_env()
+ commands[cmd](channel.name, from, arg)
+ end
+end)
+
+irc.register_callback("private_msg", function(from, message)
+ message = message:gsub("^" .. nick .. "[:,>] ", "!eval ")
+ local is_cmd, cmd, arg = message:match("^(!)([%w_]+) ?(.-)$")
+ envs[from] = envs[from] or create_env()
+ if is_cmd and commands[cmd] then
+ commands[cmd](from, from, arg)
+ else
+ commands["eval"](from, from, message)
+ end
+end)
+
+irc.register_callback("nick_change", function(from, old_nick)
+ if envs[old_nick] and not envs[from] then
+ envs[from] = envs[old_nick]
+ envs[old_nick] = nil
end
end)
-irc.connect{network = "irc.freenode.net", nick = nick}
+irc.connect{network = network, nick = nick}