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core/configmanager.lua @ 725:96110075288b
Replacing pretty_print() with top_tag() for logging
author | Matthew Wild <mwild1@gmail.com> |
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date | Fri, 16 Jan 2009 04:37:16 +0000 |
parent | 615:4ae3e81513f3 |
child | 750:fbfcf8c1c830 |
rev | line source |
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615 | 1 -- Prosody IM v0.2 |
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2 -- Copyright (C) 2008 Matthew Wild |
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3 -- Copyright (C) 2008 Waqas Hussain |
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4 -- |
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5 -- This program is free software; you can redistribute it and/or |
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6 -- modify it under the terms of the GNU General Public License |
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7 -- as published by the Free Software Foundation; either version 2 |
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8 -- of the License, or (at your option) any later version. |
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9 -- |
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10 -- This program is distributed in the hope that it will be useful, |
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11 -- but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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13 -- GNU General Public License for more details. |
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14 -- |
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15 -- You should have received a copy of the GNU General Public License |
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16 -- along with this program; if not, write to the Free Software |
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17 -- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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18 -- |
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19 |
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20 |
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21 |
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22 local _G = _G; |
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23 local setmetatable, loadfile, pcall, rawget, rawset, io = |
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24 setmetatable, loadfile, pcall, rawget, rawset, io; |
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25 |
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26 module "configmanager" |
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27 |
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28 local parsers = {}; |
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29 |
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30 local config = { ["*"] = { core = {} } }; |
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31 |
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32 local global_config = config["*"]; |
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33 |
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34 -- When host not found, use global |
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35 setmetatable(config, { __index = function () return global_config; end}); |
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36 local host_mt = { __index = global_config }; |
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37 |
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38 -- When key not found in section, check key in global's section |
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39 function section_mt(section_name) |
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40 return { __index = function (t, k) |
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41 local section = rawget(global_config, section_name); |
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42 if not section then return nil; end |
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43 return section[k]; |
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44 end }; |
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45 end |
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46 |
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47 function getconfig() |
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48 return config; |
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49 end |
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50 |
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51 function get(host, section, key) |
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52 local sec = config[host][section]; |
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53 if sec then |
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54 return sec[key]; |
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55 end |
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56 return nil; |
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57 end |
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58 |
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59 function set(host, section, key, value) |
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60 if host and section and key then |
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61 local hostconfig = rawget(config, host); |
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62 if not hostconfig then |
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63 hostconfig = rawset(config, host, setmetatable({}, host_mt))[host]; |
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64 end |
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65 if not rawget(hostconfig, section) then |
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66 hostconfig[section] = setmetatable({}, section_mt(section)); |
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67 end |
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68 hostconfig[section][key] = value; |
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69 return true; |
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70 end |
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71 return false; |
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72 end |
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73 |
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74 function load(filename, format) |
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75 format = format or filename:match("%w+$"); |
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76 |
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77 if parsers[format] and parsers[format].load then |
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78 local f, err = io.open(filename); |
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79 if f then |
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80 local ok, err = parsers[format].load(f:read("*a")); |
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81 f:close(); |
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82 return ok, err; |
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83 end |
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84 return f, err; |
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85 end |
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86 |
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87 if not format then |
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88 return nil, "no parser specified"; |
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89 else |
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90 return nil, "no parser for "..(format); |
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91 end |
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92 end |
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93 |
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94 function save(filename, format) |
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95 end |
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96 |
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97 function addparser(format, parser) |
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98 if format and parser then |
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99 parsers[format] = parser; |
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100 end |
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101 end |
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102 |
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103 -- Built-in Lua parser |
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104 do |
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105 local loadstring, pcall, setmetatable = _G.loadstring, _G.pcall, _G.setmetatable; |
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106 local setfenv, rawget, tostring = _G.setfenv, _G.rawget, _G.tostring; |
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107 parsers.lua = {}; |
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108 function parsers.lua.load(data) |
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109 local env; |
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110 env = setmetatable({ Host = true; host = true; }, { __index = function (t, k) |
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111 return rawget(_G, k) or |
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112 function (settings_table) |
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113 config[__currenthost or "*"][k] = settings_table; |
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114 end; |
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115 end, |
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116 __newindex = function (t, k, v) |
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117 set(env.__currenthost or "*", "core", k, v); |
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118 end}); |
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119 |
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120 function env.Host(name) |
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121 rawset(env, "__currenthost", name); |
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122 set(name or "*", "core", "defined", true); |
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123 end |
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124 env.host = env.Host; |
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125 |
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126 local chunk, err = loadstring(data); |
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127 |
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128 if not chunk then |
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129 return nil, err; |
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130 end |
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131 |
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132 setfenv(chunk, env); |
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133 |
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134 local ok, err = pcall(chunk); |
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135 |
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136 if not ok then |
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137 return nil, err; |
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138 end |
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139 |
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140 return true; |
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141 end |
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142 |
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143 end |
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144 |
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145 return _M; |