prosody
d43177026cda
core/configmanager.lua

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core/configmanager.lua @ 4013:d43177026cda

configmanager: Filenames without a path are also relative to the config file path, not the current working directory
author Matthew Wild <mwild1@gmail.com>
date Tue, 21 Dec 2010 22:25:54 +0000
parent 3923:f95375aceed0
child 4001:2e8411f6cb14
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 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 local _G = _G;
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10 local setmetatable, loadfile, pcall, rawget, rawset, io, error, dofile, type, pairs, table =
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11 setmetatable, loadfile, pcall, rawget, rawset, io, error, dofile, type, pairs, table;
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12 local format, math_max = string.format, math.max;
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13
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14 local fire_event = prosody and prosody.events.fire_event or function () end;
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15
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16 local lfs = require "lfs";
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17 local path_sep = package.config:sub(1,1);
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18
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19 module "configmanager"
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20
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21 local parsers = {};
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22
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23 local config_mt = { __index = function (t, k) return rawget(t, "*"); end};
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24 local config = setmetatable({ ["*"] = { core = {} } }, config_mt);
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25
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26 -- When host not found, use global
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27 local host_mt = { };
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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(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 };
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37 end
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38
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39 function getconfig()
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40 return config;
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41 end
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42
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43 function get(host, section, key)
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44 local sec = config[host][section];
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45 if sec then
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46 return sec[key];
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47 end
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48 return nil;
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49 end
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50
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51 local function set(config, host, section, key, value)
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52 if host and section and key then
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53 local hostconfig = rawget(config, host);
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54 if not hostconfig then
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55 hostconfig = rawset(config, host, setmetatable({}, host_mt))[host];
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56 end
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57 if not rawget(hostconfig, section) then
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58 hostconfig[section] = setmetatable({}, section_mt(section));
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59 end
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60 hostconfig[section][key] = value;
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61 return true;
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62 end
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63 return false;
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64 end
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65
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66 function _M.set(host, section, key, value)
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67 return set(config, host, section, key, value);
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68 end
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69
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70 -- Helper function to resolve relative paths (needed by config)
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71 do
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72 local rel_path_start = ".."..path_sep;
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73 function resolve_relative_path(parent_path, path)
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74 if path then
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75 -- Some normalization
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76 parent_path = parent_path:gsub("%"..path_sep.."+$", "");
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77 path = path:gsub("^%.%"..path_sep.."+", "");
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78
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79 local is_relative;
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80 if path_sep == "/" and path:sub(1,1) ~= "/" then
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81 is_relative = true;
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82 elseif path_sep == "\\" and (path:sub(1,1) ~= "/" and path:sub(2,3) ~= ":\\") then
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83 is_relative = true;
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84 end
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85 if is_relative then
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86 return parent_path..path_sep..path;
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87 end
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88 end
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89 return path;
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90 end
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91 end
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92
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93 -- Helper function to convert a glob to a Lua pattern
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94 local function glob_to_pattern(glob)
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95 return "^"..glob:gsub("[%p*?]", function (c)
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96 if c == "*" then
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97 return ".*";
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98 elseif c == "?" then
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99 return ".";
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100 else
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101 return "%"..c;
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102 end
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103 end).."$";
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104 end
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105
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106 function load(filename, format)
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107 format = format or filename:match("%w+$");
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108
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109 if parsers[format] and parsers[format].load then
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110 local f, err = io.open(filename);
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111 if f then
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112 local new_config = setmetatable({ ["*"] = { core = {} } }, config_mt);
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113 local ok, err = parsers[format].load(f:read("*a"), filename, new_config);
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114 f:close();
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115 if ok then
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116 config = new_config;
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117 fire_event("config-reloaded", {
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118 filename = filename,
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119 format = format,
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120 config = config
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121 });
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122 end
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123 return ok, "parser", err;
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124 end
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125 return f, "file", err;
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126 end
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127
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128 if not format then
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129 return nil, "file", "no parser specified";
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130 else
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131 return nil, "file", "no parser for "..(format);
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132 end
371
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133 end
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134
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135 function save(filename, format)
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136 end
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137
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138 function addparser(format, parser)
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139 if format and parser then
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140 parsers[format] = parser;
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141 end
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142 end
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143
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144 -- _M needed to avoid name clash with local 'parsers'
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145 function _M.parsers()
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146 local p = {};
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147 for format in pairs(parsers) do
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148 table.insert(p, format);
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149 end
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150 return p;
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151 end
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152
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153 -- Built-in Lua parser
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154 do
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155 local loadstring, pcall, setmetatable = _G.loadstring, _G.pcall, _G.setmetatable;
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156 local setfenv, rawget, tostring = _G.setfenv, _G.rawget, _G.tostring;
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157 parsers.lua = {};
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158 function parsers.lua.load(data, config_file, config)
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159 local env;
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160 -- The ' = true' are needed so as not to set off __newindex when we assign the functions below
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161 env = setmetatable({
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162 Host = true, host = true, VirtualHost = true,
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163 Component = true, component = true,
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164 Include = true, include = true, RunScript = true }, {
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165 __index = function (t, k)
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166 return rawget(_G, k) or
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167 function (settings_table)
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168 config[__currenthost or "*"][k] = settings_table;
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169 end;
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170 end,
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171 __newindex = function (t, k, v)
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172 set(config, env.__currenthost or "*", "core", k, v);
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173 end
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174 });
371
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175
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176 rawset(env, "__currenthost", "*") -- Default is global
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177 function env.VirtualHost(name)
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178 if rawget(config, name) and rawget(config[name].core, "component_module") then
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179 error(format("Host %q clashes with previously defined %s Component %q, for services use a sub-domain like conference.%s",
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180 name, config[name].core.component_module:gsub("^%a+$", { component = "external", muc = "MUC"}), name, name), 0);
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181 end
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182 rawset(env, "__currenthost", name);
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183 -- Needs at least one setting to logically exist :)
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184 set(config, name or "*", "core", "defined", true);
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185 return function (config_options)
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186 rawset(env, "__currenthost", "*"); -- Return to global scope
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187 for option_name, option_value in pairs(config_options) do
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188 set(config, name or "*", "core", option_name, option_value);
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189 end
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190 end;
371
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191 end
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192 env.Host, env.host = env.VirtualHost, env.VirtualHost;
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193
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194 function env.Component(name)
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195 if rawget(config, name) and rawget(config[name].core, "defined") and not rawget(config[name].core, "component_module") then
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196 error(format("Component %q clashes with previously defined Host %q, for services use a sub-domain like conference.%s",
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197 name, name, name), 0);
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198 end
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199 set(config, name, "core", "component_module", "component");
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200 -- Don't load the global modules by default
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201 set(config, name, "core", "load_global_modules", false);
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202 rawset(env, "__currenthost", name);
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203 local function handle_config_options(config_options)
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204 rawset(env, "__currenthost", "*"); -- Return to global scope
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205 for option_name, option_value in pairs(config_options) do
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206 set(config, name or "*", "core", option_name, option_value);
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207 end
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208 end
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209
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210 return function (module)
857
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diff changeset
211 if type(module) == "string" then
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212 set(config, name, "core", "component_module", module);
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213 return handle_config_options;
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diff changeset
214 end
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215 return handle_config_options(module);
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216 end
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diff changeset
217 end
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diff changeset
218 env.component = env.Component;
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219
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220 function env.Include(file, wildcard)
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221 if file:match("[*?]") then
f95375aceed0 configmanager: Support for wildcards in Include directives
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diff changeset
222 local path_pos, glob = file:match("()([^"..path_sep.."]+)$");
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223 local path = file:sub(1, math_max(path_pos-2,0));
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diff changeset
224 local config_path = config_file:gsub("[^"..path_sep.."]+$", "");
3923
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225 if #path > 0 then
4013
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226 path = resolve_relative_path(config_path, path);
3923
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diff changeset
227 else
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228 path = config_path;
3923
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229 end
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230 local patt = glob_to_pattern(glob);
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diff changeset
231 for f in lfs.dir(path) do
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diff changeset
232 if f:sub(1,1) ~= "." and f:match(patt) then
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diff changeset
233 env.Include(path..path_sep..f);
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234 end
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235 end
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diff changeset
236 else
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diff changeset
237 local f, err = io.open(file);
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238 if f then
f95375aceed0 configmanager: Support for wildcards in Include directives
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diff changeset
239 local data = f:read("*a");
f95375aceed0 configmanager: Support for wildcards in Include directives
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diff changeset
240 local file = resolve_relative_path(config_file:gsub("[^"..path_sep.."]+$", ""), file);
f95375aceed0 configmanager: Support for wildcards in Include directives
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diff changeset
241 local ret, err = parsers.lua.load(data, file, config);
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diff changeset
242 if not ret then error(err:gsub("%[string.-%]", file), 0); end
f95375aceed0 configmanager: Support for wildcards in Include directives
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diff changeset
243 end
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diff changeset
244 if not f then error("Error loading included "..file..": "..err, 0); end
f95375aceed0 configmanager: Support for wildcards in Include directives
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diff changeset
245 return f, err;
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912dc389935a Add Include command to include extra configuration files from the main one
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parents: 793
diff changeset
246 end
912dc389935a Add Include command to include extra configuration files from the main one
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parents: 793
diff changeset
247 end
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248 env.include = env.Include;
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249
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diff changeset
250 function env.RunScript(file)
3923
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diff changeset
251 return dofile(resolve_relative_path(config_file:gsub("[^"..path_sep.."]+$", ""), file));
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252 end
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253
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diff changeset
254 local chunk, err = loadstring(data, "@"..config_file);
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255
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256 if not chunk then
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257 return nil, err;
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258 end
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259
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260 setfenv(chunk, env);
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261
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262 local ok, err = pcall(chunk);
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263
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264 if not ok then
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265 return nil, err;
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266 end
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267
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f617718d2221 configmanager: Change parser API again to pass a config table to insert settings to. Fixes Include(). (Thanks Zash/answerman)
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268 return true;
371
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269 end
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270
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271 end
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272
466
0ecfd89c2cc0 Fix for configmanager when config file can't be found
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273 return _M;