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core/configmanager.lua @ 2886:3baee526d714
mod_compression: Return <setup-failed/> instead of <unsupported-method/> where applicable.
author | Waqas Hussain <waqas20@gmail.com> |
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date | Tue, 09 Mar 2010 20:14:47 +0500 |
parent | 2862:dae09dd45bed |
child | 2923:b7049746bd29 |
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-- Prosody IM -- Copyright (C) 2008-2009 Matthew Wild -- Copyright (C) 2008-2009 Waqas Hussain -- -- This project is MIT/X11 licensed. Please see the -- COPYING file in the source package for more information. -- local _G = _G; local setmetatable, loadfile, pcall, rawget, rawset, io, error, dofile, type, pairs, table, format = setmetatable, loadfile, pcall, rawget, rawset, io, error, dofile, type, pairs, table, string.format; local eventmanager = require "core.eventmanager"; module "configmanager" local parsers = {}; local config = { ["*"] = { core = {} } }; local global_config = config["*"]; -- When host not found, use global setmetatable(config, { __index = function () return global_config; end}); local host_mt = { __index = global_config }; -- When key not found in section, check key in global's section function section_mt(section_name) return { __index = function (t, k) local section = rawget(global_config, section_name); if not section then return nil; end return section[k]; end }; end function getconfig() return config; end function get(host, section, key) local sec = config[host][section]; if sec then return sec[key]; end return nil; end function set(host, section, key, value) if host and section and key then local hostconfig = rawget(config, host); if not hostconfig then hostconfig = rawset(config, host, setmetatable({}, host_mt))[host]; end if not rawget(hostconfig, section) then hostconfig[section] = setmetatable({}, section_mt(section)); end hostconfig[section][key] = value; return true; end return false; end function load(filename, format) format = format or filename:match("%w+$"); if parsers[format] and parsers[format].load then local f, err = io.open(filename); if f then local ok, err = parsers[format].load(f:read("*a"), filename); f:close(); if ok then eventmanager.fire_event("config-reloaded", { filename = filename, format = format }); end return ok, "parser", err; end return f, "file", err; end if not format then return nil, "file", "no parser specified"; else return nil, "file", "no parser for "..(format); end end function save(filename, format) end function addparser(format, parser) if format and parser then parsers[format] = parser; end end -- Built-in Lua parser do local loadstring, pcall, setmetatable = _G.loadstring, _G.pcall, _G.setmetatable; local setfenv, rawget, tostring = _G.setfenv, _G.rawget, _G.tostring; parsers.lua = {}; function parsers.lua.load(data, filename) local env; -- The ' = true' are needed so as not to set off __newindex when we assign the functions below env = setmetatable({ Host = true; host = true; Component = true, component = true, Include = true, include = true, RunScript = dofile }, { __index = function (t, k) return rawget(_G, k) or function (settings_table) config[__currenthost or "*"][k] = settings_table; end; end, __newindex = function (t, k, v) set(env.__currenthost or "*", "core", k, v); end}); rawset(env, "__currenthost", "*") -- Default is global function env.Host(name) if rawget(config, name) and rawget(config[name].core, "component_module") then error(format("Host %q clashes with previously defined %s Component %q, for services use a sub-domain like conference.%s", name, config[name].core.component_module:gsub("^%a+$", { component = "external", muc = "MUC"}), name, name), 0); end rawset(env, "__currenthost", name); -- Needs at least one setting to logically exist :) set(name or "*", "core", "defined", true); end env.host = env.Host; function env.Component(name) if rawget(config, name) and rawget(config[name].core, "defined") and not rawget(config[name].core, "component_module") then error(format("Component %q clashes with previously defined Host %q, for services use a sub-domain like conference.%s", name, name, name), 0); end set(name, "core", "component_module", "component"); -- Don't load the global modules by default set(name, "core", "load_global_modules", false); rawset(env, "__currenthost", name); return function (module) if type(module) == "string" then set(name, "core", "component_module", module); end end end env.component = env.Component; function env.Include(file) local f, err = io.open(file); if f then local data = f:read("*a"); local ok, err = parsers.lua.load(data, file); if not ok then error(err:gsub("%[string.-%]", file), 0); end end if not f then error("Error loading included "..file..": "..err, 0); end return f, err; end env.include = env.Include; local chunk, err = loadstring(data, "@"..filename); if not chunk then return nil, err; end setfenv(chunk, env); local ok, err = pcall(chunk); if not ok then return nil, err; end return true; end end return _M;