prosody
1600aff0839f
core/configmanager.lua

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core/configmanager.lua @ 2710:1600aff0839f

net.adns: Trailing whitespace
author Matthew Wild <mwild1@gmail.com>
date Wed, 20 Jan 2010 02:44:38 +0000
parent 1777:de86734d3f7f
child 2427:343a9eb7540e
child 2861:1402615b66f8
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2009 Matthew Wild
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3 -- Copyright (C) 2008-2009 Waqas Hussain
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4 --
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b1885732e979 GPL->MIT!
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9
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10
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11 local _G = _G;
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12 local setmetatable, loadfile, pcall, rawget, rawset, io, error, dofile, type =
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13 setmetatable, loadfile, pcall, rawget, rawset, io, error, dofile, type;
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14
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15 local eventmanager = require "core.eventmanager";
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16
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17 module "configmanager"
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18
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19 local parsers = {};
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20
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21 local config = { ["*"] = { core = {} } };
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22
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23 local global_config = config["*"];
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24
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25 -- When host not found, use global
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26 setmetatable(config, { __index = function () return global_config; end});
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27 local host_mt = { __index = global_config };
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28
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29 -- When key not found in section, check key in global's section
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30 function section_mt(section_name)
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31 return { __index = function (t, k)
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32 local section = rawget(global_config, section_name);
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33 if not section then return nil; end
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34 return section[k];
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35 end };
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36 end
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37
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38 function getconfig()
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39 return config;
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40 end
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41
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42 function get(host, section, key)
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43 local sec = config[host][section];
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44 if sec then
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45 return sec[key];
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46 end
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47 return nil;
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48 end
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49
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50 function set(host, section, key, value)
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51 if host and section and key then
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52 local hostconfig = rawget(config, host);
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53 if not hostconfig then
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54 hostconfig = rawset(config, host, setmetatable({}, host_mt))[host];
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55 end
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56 if not rawget(hostconfig, section) then
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57 hostconfig[section] = setmetatable({}, section_mt(section));
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58 end
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59 hostconfig[section][key] = value;
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60 return true;
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61 end
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62 return false;
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63 end
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64
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65 function load(filename, format)
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66 format = format or filename:match("%w+$");
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67
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68 if parsers[format] and parsers[format].load then
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69 local f, err = io.open(filename);
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70 if f then
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71 local ok, err = parsers[format].load(f:read("*a"), filename);
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72 f:close();
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73 if ok then
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74 eventmanager.fire_event("config-reloaded", { filename = filename, format = format });
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75 end
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76 return ok, "parser", err;
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77 end
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78 return f, "file", err;
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79 end
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80
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81 if not format then
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82 return nil, "file", "no parser specified";
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83 else
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84 return nil, "file", "no parser for "..(format);
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85 end
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86 end
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87
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88 function save(filename, format)
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89 end
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90
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91 function addparser(format, parser)
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92 if format and parser then
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93 parsers[format] = parser;
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94 end
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95 end
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96
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97 -- Built-in Lua parser
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98 do
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99 local loadstring, pcall, setmetatable = _G.loadstring, _G.pcall, _G.setmetatable;
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100 local setfenv, rawget, tostring = _G.setfenv, _G.rawget, _G.tostring;
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101 parsers.lua = {};
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102 function parsers.lua.load(data, filename)
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103 local env;
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104 -- The ' = true' are needed so as not to set off __newindex when we assign the functions below
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105 env = setmetatable({ Host = true; host = true; Component = true, component = true,
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106 Include = true, include = true, RunScript = dofile }, { __index = function (t, k)
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107 return rawget(_G, k) or
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108 function (settings_table)
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109 config[__currenthost or "*"][k] = settings_table;
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110 end;
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111 end,
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112 __newindex = function (t, k, v)
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113 set(env.__currenthost or "*", "core", k, v);
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114 end});
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115
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116 rawset(env, "__currenthost", "*") -- Default is global
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117 function env.Host(name)
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118 rawset(env, "__currenthost", name);
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119 -- Needs at least one setting to logically exist :)
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120 set(name or "*", "core", "defined", true);
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121 end
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122 env.host = env.Host;
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123
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124 function env.Component(name)
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125 set(name, "core", "component_module", "component");
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126 -- Don't load the global modules by default
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127 set(name, "core", "load_global_modules", false);
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128 rawset(env, "__currenthost", name);
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129
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130 return function (module)
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131 if type(module) == "string" then
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132 set(name, "core", "component_module", module);
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133 end
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134 end
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135 end
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136 env.component = env.Component;
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137
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138 function env.Include(file)
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139 local f, err = io.open(file);
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140 if f then
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141 local data = f:read("*a");
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142 local ok, err = parsers.lua.load(data, file);
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143 if not ok then error(err:gsub("%[string.-%]", file), 0); end
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144 end
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145 if not f then error("Error loading included "..file..": "..err, 0); end
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146 return f, err;
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147 end
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148 env.include = env.Include;
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149
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150 local chunk, err = loadstring(data, "@"..filename);
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151
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152 if not chunk then
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153 return nil, err;
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154 end
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155
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156 setfenv(chunk, env);
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157
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158 local ok, err = pcall(chunk);
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159
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160 if not ok then
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161 return nil, err;
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162 end
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163
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164 return true;
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165 end
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166
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167 end
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168
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169 return _M;