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--
-- This file is part of LEM, a Lua Event Machine.
-- Copyright 2011-2013 Emil Renner Berthing
--
-- LEM is free software: you can redistribute it and/or modify it
-- under the terms of the GNU Lesser General Public License as
-- published by the Free Software Foundation, either version 3 of
-- the License, or (at your option) any later version.
--
-- LEM is distributed in the hope that it will be useful, but
-- WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU Lesser General Public License for more details.
--
-- You should have received a copy of the GNU Lesser General Public
-- License along with LEM. If not, see <http://www.gnu.org/licenses/>.
--
local load = load
local format = string.format
local concat = table.concat
local tostring = tostring
local select = select
local function repl(name, ins, outs)
name = '=' .. name
local function onreturn(ok, ...)
if not ok then
local ok, err = outs:write(format("%s\n", select(1, ...)))
if not ok then return nil, err end
return true
end
local args = select('#', ...)
if args == 0 then return true end
local rstr
do
local t = { ... }
for i = 1, args - 1 do
t[i] = tostring(t[i])
end
t[args] = tostring(t[args])..'\n'
rstr = concat(t, '\t')
end
local ok, err = outs:write(rstr)
if not ok then return nil, err end
return true
end
while true do
local res, err = outs:write('> ')
if not res then return nil, err end
res, err = ins:read('*l')
if not res then return nil, err end
local line = res:gsub('^=', 'return ')
while true do
res, err = load(line, name)
if res then
res, err = onreturn(pcall(res))
if not res then return nil, err end
break
end
if not err:match("<eof>") then
res, err = outs:write(format("%s\n", err))
if not res then return nil, err end
break
end
res, err = outs:write('>> ')
if not res then return nil, err end
res, err = ins:read('*l')
if not res then return nil, err end
line = line .. ('\n' .. res)
end
end
end
-- if not run directly just return the module table
if not arg or arg[0] then
return { repl = repl }
end
local io = require 'lem.io'
io.stdout:write([[
A Lua Event Machine 0.3 Copyright 2011-2013 Emil Renner Berthing
]])
local _, err = repl('stdin', io.stdin, io.stdout)
print(err or '')
-- vim: ts=2 sw=2 noet:
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