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core/configmanager.lua @ 5138:7dc57dfaebbe
prosodyctl: Set $HOME to data path. Fixes issue with openssl and random state (Thanks Florob)
author | Kim Alvefur <zash@zash.se> |
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date | Wed, 19 Sep 2012 23:24:40 +0200 (2012-09-19) |
parent | 5124:a4a74a0e9b9c |
child | 5357:ac530c44772e |
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-- 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, loadfile, pcall, rawget, rawset, io, error, dofile, type, pairs, table = setmetatable, loadfile, pcall, 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({ ["*"] = { core = {} } }, config_mt); -- When host not found, use global local host_mt = { }; -- 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(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) if not key then section, key = "core", section; end local sec = config[host][section]; if sec then return sec[key]; end return nil; end function _M.rawget(host, section, key) local hostconfig = rawget(config, host); if hostconfig then local sectionconfig = rawget(hostconfig, section); if sectionconfig then return rawget(sectionconfig, key); end end end local function set(config, 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 _M.set(host, section, key, value) return set(config, host, section, key, value); end -- Helper function to resolve relative paths (needed by config) do local rel_path_start = ".."..path_sep; 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({ ["*"] = { core = {} } }, 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, tostring = _G.rawget, _G.tostring; 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) or function (settings_table) config[__currenthost or "*"][k] = settings_table; end; end, __newindex = function (t, k, v) set(config, env.__currenthost or "*", "core", k, v); end }); rawset(env, "__currenthost", "*") -- Default is global function env.VirtualHost(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+$", { component = "external", muc = "MUC"}), name, name), 0); end rawset(env, "__currenthost", name); -- Needs at least one setting to logically exist :) set(config, name or "*", "core", "defined", true); return function (config_options) rawset(env, "__currenthost", "*"); -- Return to global scope for option_name, option_value in pairs(config_options) do set(config, name or "*", "core", option_name, option_value); end end; end env.Host, env.host = env.VirtualHost, env.VirtualHost; function env.Component(name) if rawget(config, name) and rawget(config[name].core, "defined") and not rawget(config[name].core, "component_module") then error(format("Component %q clashes with previously defined Host %q, for services use a sub-domain like conference.%s", name, name, name), 0); end set(config, name, "core", "component_module", "component"); -- Don't load the global modules by default set(config, name, "core", "load_global_modules", false); rawset(env, "__currenthost", name); local function handle_config_options(config_options) rawset(env, "__currenthost", "*"); -- Return to global scope for option_name, option_value in pairs(config_options) do set(config, name or "*", "core", option_name, option_value); end end return function (module) if type(module) == "string" then set(config, name, "core", "component_module", module); return handle_config_options; end return handle_config_options(module); end end env.component = env.Component; function env.Include(file, wildcard) if file:match("[*?]") then local path_pos, glob = file:match("()([^"..path_sep.."]+)$"); 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;