prosody
55add3b87c01
core/configmanager.lua

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core/configmanager.lua @ 793:55add3b87c01

Report errors in the config file to the user
author Matthew Wild <mwild1@gmail.com>
date Fri, 13 Feb 2009 14:37:15 +0000
parent 760:90ce865eebd8
child 794:912dc389935a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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5cccfb5da6cb 0.2->0.3
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1 -- Prosody IM v0.3
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90ce865eebd8 Update copyright notices for 2009
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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 =
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13 setmetatable, loadfile, pcall, rawget, rawset, io;
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14
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15 module "configmanager"
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16
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17 local parsers = {};
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18
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19 local config = { ["*"] = { core = {} } };
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20
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21 local global_config = config["*"];
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22
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23 -- When host not found, use global
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24 setmetatable(config, { __index = function () return global_config; end});
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25 local host_mt = { __index = global_config };
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26
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27 -- When key not found in section, check key in global's section
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28 function section_mt(section_name)
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29 return { __index = function (t, k)
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30 local section = rawget(global_config, section_name);
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31 if not section then return nil; end
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32 return section[k];
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33 end };
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34 end
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35
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36 function getconfig()
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37 return config;
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38 end
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39
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40 function get(host, section, key)
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41 local sec = config[host][section];
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42 if sec then
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43 return sec[key];
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44 end
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45 return nil;
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46 end
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47
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48 function set(host, section, key, value)
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49 if host and section and key then
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50 local hostconfig = rawget(config, host);
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51 if not hostconfig then
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52 hostconfig = rawset(config, host, setmetatable({}, host_mt))[host];
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53 end
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54 if not rawget(hostconfig, section) then
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55 hostconfig[section] = setmetatable({}, section_mt(section));
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56 end
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57 hostconfig[section][key] = value;
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58 return true;
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59 end
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60 return false;
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61 end
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62
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63 function load(filename, format)
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64 format = format or filename:match("%w+$");
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65
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66 if parsers[format] and parsers[format].load then
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67 local f, err = io.open(filename);
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68 if f then
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69 local ok, err = parsers[format].load(f:read("*a"));
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70 f:close();
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71 return ok, "parser", err;
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72 end
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73 return f, "file", err;
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74 end
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75
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76 if not format then
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77 return nil, "file", "no parser specified";
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78 else
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79 return nil, "file", "no parser for "..(format);
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80 end
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81 end
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82
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83 function save(filename, format)
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84 end
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85
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86 function addparser(format, parser)
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87 if format and parser then
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88 parsers[format] = parser;
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89 end
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90 end
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91
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92 -- Built-in Lua parser
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93 do
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94 local loadstring, pcall, setmetatable = _G.loadstring, _G.pcall, _G.setmetatable;
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95 local setfenv, rawget, tostring = _G.setfenv, _G.rawget, _G.tostring;
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96 parsers.lua = {};
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97 function parsers.lua.load(data)
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98 local env;
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99 -- The ' = true' are needed so as not to set off __newindex when we assign the functions below
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100 env = setmetatable({ Host = true; host = true; Component = true, component = true }, { __index = function (t, k)
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101 return rawget(_G, k) or
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102 function (settings_table)
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103 config[__currenthost or "*"][k] = settings_table;
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104 end;
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105 end,
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106 __newindex = function (t, k, v)
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107 set(env.__currenthost or "*", "core", k, v);
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108 end});
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109
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110 function env.Host(name)
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111 rawset(env, "__currenthost", name);
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112 -- Needs at least one setting to logically exist :)
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113 set(name or "*", "core", "defined", true);
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114 end
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115 env.host = env.Host;
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116
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117 function env.Component(name)
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118 return function (module)
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119 set(name, "core", "component_module", module);
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120 -- Don't load the global modules by default
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121 set(name, "core", "modules_enable", false);
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122 rawset(env, "__currenthost", name);
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123 end
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124 end
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125 env.component = env.Component;
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126
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127 local chunk, err = loadstring(data);
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128
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129 if not chunk then
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130 return nil, err;
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131 end
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132
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133 setfenv(chunk, env);
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134
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135 local ok, err = pcall(chunk);
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136
0dc5819660e8 Import initial configmanager, not sure if it works yet, but it does pass the unit tests ;)
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137 if not ok then
0dc5819660e8 Import initial configmanager, not sure if it works yet, but it does pass the unit tests ;)
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138 return nil, err;
0dc5819660e8 Import initial configmanager, not sure if it works yet, but it does pass the unit tests ;)
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139 end
0dc5819660e8 Import initial configmanager, not sure if it works yet, but it does pass the unit tests ;)
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140
0dc5819660e8 Import initial configmanager, not sure if it works yet, but it does pass the unit tests ;)
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141 return true;
0dc5819660e8 Import initial configmanager, not sure if it works yet, but it does pass the unit tests ;)
Matthew Wild <mwild1@gmail.com>
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142 end
0dc5819660e8 Import initial configmanager, not sure if it works yet, but it does pass the unit tests ;)
Matthew Wild <mwild1@gmail.com>
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143
0dc5819660e8 Import initial configmanager, not sure if it works yet, but it does pass the unit tests ;)
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144 end
0dc5819660e8 Import initial configmanager, not sure if it works yet, but it does pass the unit tests ;)
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145
466
0ecfd89c2cc0 Fix for configmanager when config file can't be found
Matthew Wild <mwild1@gmail.com>
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146 return _M;