if not modules then modules = { } end modules ['l-lua'] = {
    version   = 1.001,
    comment   = "companion to luat-lib.mkiv",
    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
    copyright = "PRAGMA ADE / ConTeXt Development Team",
    license   = "see context related readme files"
}

-- compatibility hacks and helpers

LUAMAJORVERSION = status.lua_version_major
LUAMINORVERSION = status.lua_version_minor
LUAVERSION      = status.lua_version

if not loadstring      then loadstring      = load              end
if not table.unpack    then table.unpack    = _G.unpack         end
if not unpack          then _G.unpack       = table.unpack      end
if not package.loaders then package.loaders = package.searchers end -- brr, searchers is a special "loadlib function" userdata type

do

    local print, select, tostring, type, next = print, select, tostring, type, next

    local inspectors = { }

    function setinspector(kind,inspector) -- global function
        inspectors[kind] = inspector
    end

    function inspect(...) -- global function
        for s=1,select("#",...) do
            local value = select(s,...)
            if value == nil then
                print("nil")
            else
                local done  = false
                -- type driven (table)
                local kind      = type(value)
                local inspector = inspectors[kind]
                if inspector then
                    done = inspector(value)
                    if done then
                        break
                    end
                end
                -- whatever driven (token, node, ...)
                for kind, inspector in next, inspectors do
                    done = inspector(value)
                    if done then
                        break
                    end
                end
                if not done then
                    print(tostring(value))
                end
            end
        end
    end

end

do

    local xpcall = xpcall

    local dummy = function() end

    function optionalrequire(...)
        local ok, result = xpcall(require,dummy,...)
        if ok then
            return result
        end
    end

end

do

    local flush   = io.flush
    local execute = os.execute
    local popen   = io.popen

    function os.execute(...) flush() return execute(...) end
    function io.popen  (...) flush() return popen  (...) end

end

os.setenv("engine",string.lower(status.luatex_engine or "unknown"))