diff options
Diffstat (limited to 'core/configmanager.lua')
| -rw-r--r-- | core/configmanager.lua | 265 |
1 files changed, 265 insertions, 0 deletions
diff --git a/core/configmanager.lua b/core/configmanager.lua new file mode 100644 index 00000000..9720f48a --- /dev/null +++ b/core/configmanager.lua @@ -0,0 +1,265 @@ +-- Prosody IM +-- Copyright (C) 2008-2010 Matthew Wild +-- Copyright (C) 2008-2010 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, rawget, rawset, io, error, dofile, type, pairs, table = + setmetatable, rawget, rawset, io, error, dofile, type, pairs, table; +local format, math_max = string.format, math.max; + +local fire_event = prosody and prosody.events.fire_event or function () end; + +local envload = require"util.envload".envload; +local lfs = require "lfs"; +local path_sep = package.config:sub(1,1); + +module "configmanager" + +local parsers = {}; + +local config_mt = { __index = function (t, k) return rawget(t, "*"); end}; +local config = setmetatable({ ["*"] = { } }, config_mt); + +-- When host not found, use global +local host_mt = { __index = function(_, k) return config["*"][k] end } + +function getconfig() + return config; +end + +function get(host, key, _oldkey) + if key == "core" then + key = _oldkey; -- COMPAT with code that still uses "core" + end + return config[host][key]; +end +function _M.rawget(host, key, _oldkey) + if key == "core" then + key = _oldkey; -- COMPAT with code that still uses "core" + end + local hostconfig = rawget(config, host); + if hostconfig then + return rawget(hostconfig, key); + end +end + +local function set(config, host, key, value) + if host and key then + local hostconfig = rawget(config, host); + if not hostconfig then + hostconfig = rawset(config, host, setmetatable({}, host_mt))[host]; + end + hostconfig[key] = value; + return true; + end + return false; +end + +function _M.set(host, key, value, _oldvalue) + if key == "core" then + key, value = value, _oldvalue; --COMPAT with code that still uses "core" + end + return set(config, host, key, value); +end + +-- Helper function to resolve relative paths (needed by config) +do + function resolve_relative_path(parent_path, path) + if path then + -- Some normalization + parent_path = parent_path:gsub("%"..path_sep.."+$", ""); + path = path:gsub("^%.%"..path_sep.."+", ""); + + local is_relative; + if path_sep == "/" and path:sub(1,1) ~= "/" then + is_relative = true; + elseif path_sep == "\\" and (path:sub(1,1) ~= "/" and (path:sub(2,3) ~= ":\\" or path:sub(2,3) ~= ":/")) then + is_relative = true; + end + if is_relative then + return parent_path..path_sep..path; + end + end + return path; + end +end + +-- Helper function to convert a glob to a Lua pattern +local function glob_to_pattern(glob) + return "^"..glob:gsub("[%p*?]", function (c) + if c == "*" then + return ".*"; + elseif c == "?" then + return "."; + else + return "%"..c; + end + end).."$"; +end + +function load(filename, format) + format = format or filename:match("%w+$"); + + if parsers[format] and parsers[format].load then + local f, err = io.open(filename); + if f then + local new_config = setmetatable({ ["*"] = { } }, config_mt); + local ok, err = parsers[format].load(f:read("*a"), filename, new_config); + f:close(); + if ok then + config = new_config; + fire_event("config-reloaded", { + filename = filename, + format = format, + config = config + }); + end + return ok, "parser", err; + end + return f, "file", err; + end + + if not format then + return nil, "file", "no parser specified"; + else + return nil, "file", "no parser for "..(format); + end +end + +function save(filename, format) +end + +function addparser(format, parser) + if format and parser then + parsers[format] = parser; + end +end + +-- _M needed to avoid name clash with local 'parsers' +function _M.parsers() + local p = {}; + for format in pairs(parsers) do + table.insert(p, format); + end + return p; +end + +-- Built-in Lua parser +do + local pcall, setmetatable = _G.pcall, _G.setmetatable; + local rawget = _G.rawget; + parsers.lua = {}; + function parsers.lua.load(data, config_file, config) + local env; + -- The ' = true' are needed so as not to set off __newindex when we assign the functions below + env = setmetatable({ + Host = true, host = true, VirtualHost = true, + Component = true, component = true, + Include = true, include = true, RunScript = true }, { + __index = function (t, k) + return rawget(_G, k); + end, + __newindex = function (t, k, v) + set(config, env.__currenthost or "*", k, v); + end + }); + + rawset(env, "__currenthost", "*") -- Default is global + function env.VirtualHost(name) + if rawget(config, name) and rawget(config[name], "component_module") then + error(format("Host %q clashes with previously defined %s Component %q, for services use a sub-domain like conference.%s", + name, config[name].component_module:gsub("^%a+$", { component = "external", muc = "MUC"}), name, name), 0); + end + rawset(env, "__currenthost", name); + -- Needs at least one setting to logically exist :) + set(config, name or "*", "defined", true); + return function (config_options) + rawset(env, "__currenthost", "*"); -- Return to global scope + for option_name, option_value in pairs(config_options) do + set(config, name or "*", option_name, option_value); + end + end; + end + env.Host, env.host = env.VirtualHost, env.VirtualHost; + + function env.Component(name) + if rawget(config, name) and rawget(config[name], "defined") and not rawget(config[name], "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(config, name, "component_module", "component"); + -- Don't load the global modules by default + set(config, name, "load_global_modules", false); + rawset(env, "__currenthost", name); + local function handle_config_options(config_options) + rawset(env, "__currenthost", "*"); -- Return to global scope + for option_name, option_value in pairs(config_options) do + set(config, name or "*", option_name, option_value); + end + end + + return function (module) + if type(module) == "string" then + set(config, name, "component_module", module); + return handle_config_options; + end + return handle_config_options(module); + end + end + env.component = env.Component; + + function env.Include(file) + if file:match("[*?]") then + local path_pos, glob = file:match("()([^"..path_sep.."]+)$"); + local path = file:sub(1, math_max(path_pos-2,0)); + local config_path = config_file:gsub("[^"..path_sep.."]+$", ""); + if #path > 0 then + path = resolve_relative_path(config_path, path); + else + path = config_path; + end + local patt = glob_to_pattern(glob); + for f in lfs.dir(path) do + if f:sub(1,1) ~= "." and f:match(patt) then + env.Include(path..path_sep..f); + end + end + else + local file = resolve_relative_path(config_file:gsub("[^"..path_sep.."]+$", ""), file); + local f, err = io.open(file); + if f then + local ret, err = parsers.lua.load(f:read("*a"), file, config); + if not ret then error(err:gsub("%[string.-%]", file), 0); end + end + if not f then error("Error loading included "..file..": "..err, 0); end + return f, err; + end + end + env.include = env.Include; + + function env.RunScript(file) + return dofile(resolve_relative_path(config_file:gsub("[^"..path_sep.."]+$", ""), file)); + end + + local chunk, err = envload(data, "@"..config_file, env); + + if not chunk then + return nil, err; + end + + local ok, err = pcall(chunk); + + if not ok then + return nil, err; + end + + return true; + end + +end + +return _M; |