prosody
6d87944df37c
core/configmanager.lua

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core/configmanager.lua @ 376:6d87944df37c

New configmanager. Old-style config files still work, but will print a warning
author Matthew Wild <mwild1@gmail.com>
date Sun, 23 Nov 2008 02:12:46 +0000
parent 371:0dc5819660e8
child 466:0ecfd89c2cc0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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371
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1
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2 local _G = _G;
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3 local setmetatable, loadfile, pcall, rawget, rawset, io =
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4 setmetatable, loadfile, pcall, rawget, rawset, io;
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5 module "configmanager"
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6
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7 local parsers = {};
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8
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9 local config = { ["*"] = { core = {} } };
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10
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11 local global_config = config["*"];
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12
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13 -- When host not found, use global
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14 setmetatable(config, { __index = function () return global_config; end});
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15 local host_mt = { __index = global_config };
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16
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17 -- When key not found in section, check key in global's section
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18 function section_mt(section_name)
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19 return { __index = function (t, k)
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20 local section = rawget(global_config, section_name);
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21 if not section then return nil; end
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22 return section[k];
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23 end };
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24 end
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25
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26 function getconfig()
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27 return config;
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28 end
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29
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30 function get(host, section, key)
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31 local sec = config[host][section];
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32 if sec then
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33 return sec[key];
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34 end
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35 return nil;
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36 end
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37
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38 function set(host, section, key, value)
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39 if host and section and key then
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40 local hostconfig = rawget(config, host);
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41 if not hostconfig then
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42 hostconfig = rawset(config, host, setmetatable({}, host_mt))[host];
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43 end
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44 if not rawget(hostconfig, section) then
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45 hostconfig[section] = setmetatable({}, section_mt(section));
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46 end
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47 hostconfig[section][key] = value;
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48 return true;
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49 end
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50 return false;
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51 end
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52
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53 function load(filename, format)
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54 format = format or filename:match("%w+$");
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55 if parsers[format] and parsers[format].load then
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56 local f = io.open(filename);
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57 if f then
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58 local ok, err = parsers[format].load(f:read("*a"));
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59 f:close();
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60 return ok, err;
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61 end
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62 end
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63 if not format then
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64 return nil, "no parser specified";
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65 else
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66 return false, "no parser";
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67 end
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68 end
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69
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70 function save(filename, format)
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71 end
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72
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73 function addparser(format, parser)
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74 if format and parser then
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75 parsers[format] = parser;
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76 end
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77 end
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78
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79 -- Built-in Lua parser
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80 do
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81 local loadstring, pcall, setmetatable = _G.loadstring, _G.pcall, _G.setmetatable;
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82 local setfenv, rawget, tostring = _G.setfenv, _G.rawget, _G.tostring;
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83 parsers.lua = {};
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84 function parsers.lua.load(data)
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85 local env;
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86 env = setmetatable({ Host = true; host = true; }, { __index = function (t, k)
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87 return rawget(_G, k) or
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88 function (settings_table)
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89 config[__currenthost or "*"][k] = settings_table;
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90 end;
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91 end,
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92 __newindex = function (t, k, v)
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93 set(env.__currenthost or "*", "core", k, v);
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94 end});
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95
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96 function env.Host(name)
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97 rawset(env, "__currenthost", name);
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98 set(name or "*", "core", "defined", true);
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99 end
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100 env.host = env.Host;
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101
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102 local chunk, err = loadstring(data);
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103
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104 if not chunk then
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105 return nil, err;
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106 end
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107
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108 setfenv(chunk, env);
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109
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110 local ok, err = pcall(chunk);
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111
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112 if not ok then
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113 return nil, err;
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114 end
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115
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116 return true;
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117 end
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118
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119 end
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120
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121 return _M;