prosody
0dc5819660e8
core/configmanager.lua

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core/configmanager.lua @ 371:0dc5819660e8

Import initial configmanager, not sure if it works yet, but it does pass the unit tests ;)
author Matthew Wild <mwild1@gmail.com>
date Fri, 21 Nov 2008 05:47:27 +0000
child 376:6d87944df37c
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371
0dc5819660e8 Import initial configmanager, not sure if it works yet, but it does pass the unit tests ;)
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1
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2 local _G = _G;
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3 module "configmanager"
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4
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5 local parsers = {};
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6
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7 local config = { ["*"] = { core = {} } };
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8
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9 local global_config = config["*"];
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10
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11 -- When host not found, use global
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12 setmetatable(config, { __index = function () return global_config; end});
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13 local host_mt = { __index = global_config };
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14
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15 -- When key not found in section, check key in global's section
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16 function section_mt(section_name)
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17 return { __index = function (t, k)
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18 local section = rawget(global_config, section_name);
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19 if not section then return nil; end
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20 return section[k];
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21 end };
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22 end
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23
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24 function get(host, section, key)
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25 local sec = config[host][section];
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26 if sec then
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27 return sec[key];
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28 end
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29 return nil;
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30 end
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31
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32 function set(host, section, key, value)
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33 if host and section and key then
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34 local hostconfig = rawget(config, host);
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35 if not hostconfig then
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36 hostconfig = rawset(config, host, setmetatable({}, host_mt))[host];
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37 end
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38 if not rawget(hostconfig, section) then
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39 hostconfig[section] = setmetatable({}, section_mt(section));
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40 end
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41 hostconfig[section][key] = value;
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42 return true;
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43 end
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44 return false;
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45 end
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46
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47 function load(filename, format)
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48 if parsers[format] and parsers[format].load then
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49 local f = io.open(filename);
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50 if f then
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51 local ok, err = parsers[format](f:read("*a"));
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52 f:close();
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53 return ok, err;
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54 end
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55 end
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56 return false, "no parser";
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57 end
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58
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59 function save(filename, format)
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60 end
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61
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62 function addparser(format, parser)
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63 if format and parser then
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64 parsers[format] = parser;
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65 end
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66 end
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67
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68 do
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69 parsers.lua = {};
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70 function parsers.lua.load(data)
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71 local env = setmetatable({}, { __index = function (t, k)
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72 if k:match("^mod_") then
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73 return function (settings_table)
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74 config[__currenthost or "*"][k] = settings_table;
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75 end;
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76 end
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77 return rawget(_G, k);
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78 end});
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79
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80 function env.Host(name)
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81 env.__currenthost = name;
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82 end
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83
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84 local chunk, err = loadstring(data);
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85
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86 if not chunk then
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87 return nil, err;
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88 end
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89
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90 setfenv(chunk, env);
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91
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92 local ok, err = pcall(chunk);
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93
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94 if not ok then
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95 return nil, err;
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96 end
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97
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98
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99
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100 return true;
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101 end
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102
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103 end
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104
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105 return _M;