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core/configmanager.lua @ 1387:64f18488b275
util.pluginloader: Remove unnecessary return value suppressing the real load error
author | Matthew Wild <mwild1@gmail.com> |
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date | Mon, 22 Jun 2009 21:56:52 +0100 |
parent | 1000:a73715a9267f |
child | 1504:9d8c35e98ca2 |
rev | line source |
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896 | 1 -- Prosody IM v0.4 |
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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 -- |
758 | 5 -- This project is MIT/X11 licensed. Please see the |
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")); |
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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) |
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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 function env.Host(name) |
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117 rawset(env, "__currenthost", name); |
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118 -- Needs at least one setting to logically exist :) |
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119 set(name or "*", "core", "defined", true); |
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120 end |
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121 env.host = env.Host; |
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122 |
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123 function env.Component(name) |
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124 set(name, "core", "component_module", "component"); |
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125 -- Don't load the global modules by default |
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126 set(name, "core", "modules_enable", false); |
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127 rawset(env, "__currenthost", name); |
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128 |
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129 return function (module) |
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130 if type(module) == "string" then |
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131 set(name, "core", "component_module", module); |
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132 end |
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133 end |
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134 end |
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135 env.component = env.Component; |
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136 |
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137 function env.Include(file) |
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138 local f, err = io.open(file); |
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139 if f then |
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140 local data = f:read("*a"); |
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141 local ok, err = parsers.lua.load(data); |
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142 if not ok then error(err:gsub("%[string.-%]", file), 0); end |
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143 end |
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144 if not f then error("Error loading included "..file..": "..err, 0); end |
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145 return f, err; |
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146 end |
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147 env.include = env.Include; |
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148 |
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149 local chunk, err = loadstring(data); |
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150 |
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151 if not chunk then |
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152 return nil, err; |
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153 end |
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154 |
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155 setfenv(chunk, env); |
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156 |
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157 local ok, err = pcall(chunk); |
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158 |
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159 if not ok then |
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160 return nil, err; |
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161 end |
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162 |
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163 return true; |
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164 end |
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165 |
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166 end |
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167 |
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168 return _M; |