prosody
2e8411f6cb14
core/configmanager.lua

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core/configmanager.lua @ 4001:2e8411f6cb14

configmanager: Added rawget().
author Waqas Hussain <waqas20@gmail.com>
date Wed, 05 Jan 2011 06:16:07 +0500
parent 3929:7cb03d67101b
child 4358:86be454168fb
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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diff changeset
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 function _M.rawget(host, section, key)
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51 local hostconfig = rawget(config, host);
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52 if hostconfig then
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53 local sectionconfig = rawget(hostconfig, section);
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54 if sectionconfig then
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55 return rawget(sectionconfig, key);
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56 end
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57 end
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58 end
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59
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60 local function set(config, host, section, key, value)
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61 if host and section and key then
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62 local hostconfig = rawget(config, host);
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63 if not hostconfig then
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64 hostconfig = rawset(config, host, setmetatable({}, host_mt))[host];
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65 end
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66 if not rawget(hostconfig, section) then
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67 hostconfig[section] = setmetatable({}, section_mt(section));
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68 end
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69 hostconfig[section][key] = value;
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70 return true;
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71 end
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72 return false;
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73 end
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74
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75 function _M.set(host, section, key, value)
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76 return set(config, host, section, key, value);
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77 end
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78
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79 -- Helper function to resolve relative paths (needed by config)
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80 do
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81 local rel_path_start = ".."..path_sep;
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82 function resolve_relative_path(parent_path, path)
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83 if path then
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84 -- Some normalization
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85 parent_path = parent_path:gsub("%"..path_sep.."+$", "");
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86 path = path:gsub("^%.%"..path_sep.."+", "");
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87
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88 local is_relative;
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89 if path_sep == "/" and path:sub(1,1) ~= "/" then
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90 is_relative = true;
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91 elseif path_sep == "\\" and (path:sub(1,1) ~= "/" and path:sub(2,3) ~= ":\\") then
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92 is_relative = true;
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93 end
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94 if is_relative then
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95 return parent_path..path_sep..path;
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96 end
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97 end
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98 return path;
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99 end
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100 end
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101
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102 -- Helper function to convert a glob to a Lua pattern
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103 local function glob_to_pattern(glob)
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104 return "^"..glob:gsub("[%p*?]", function (c)
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105 if c == "*" then
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106 return ".*";
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107 elseif c == "?" then
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108 return ".";
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109 else
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110 return "%"..c;
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111 end
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112 end).."$";
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113 end
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114
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115 function load(filename, format)
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116 format = format or filename:match("%w+$");
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117
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118 if parsers[format] and parsers[format].load then
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119 local f, err = io.open(filename);
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120 if f then
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121 local new_config = setmetatable({ ["*"] = { core = {} } }, config_mt);
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122 local ok, err = parsers[format].load(f:read("*a"), filename, new_config);
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123 f:close();
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124 if ok then
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125 config = new_config;
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126 fire_event("config-reloaded", {
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127 filename = filename,
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128 format = format,
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129 config = config
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130 });
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131 end
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132 return ok, "parser", err;
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133 end
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134 return f, "file", err;
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135 end
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136
376
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137 if not format then
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138 return nil, "file", "no parser specified";
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139 else
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140 return nil, "file", "no parser for "..(format);
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141 end
371
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142 end
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143
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144 function save(filename, format)
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145 end
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146
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147 function addparser(format, parser)
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148 if format and parser then
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149 parsers[format] = parser;
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150 end
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151 end
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152
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153 -- _M needed to avoid name clash with local 'parsers'
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154 function _M.parsers()
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155 local p = {};
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156 for format in pairs(parsers) do
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157 table.insert(p, format);
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158 end
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159 return p;
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160 end
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161
376
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162 -- Built-in Lua parser
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163 do
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164 local loadstring, pcall, setmetatable = _G.loadstring, _G.pcall, _G.setmetatable;
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165 local setfenv, rawget, tostring = _G.setfenv, _G.rawget, _G.tostring;
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166 parsers.lua = {};
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167 function parsers.lua.load(data, config_file, config)
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168 local env;
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169 -- The ' = true' are needed so as not to set off __newindex when we assign the functions below
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170 env = setmetatable({
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171 Host = true, host = true, VirtualHost = true,
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172 Component = true, component = true,
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173 Include = true, include = true, RunScript = true }, {
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174 __index = function (t, k)
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175 return rawget(_G, k) or
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176 function (settings_table)
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177 config[__currenthost or "*"][k] = settings_table;
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178 end;
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179 end,
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180 __newindex = function (t, k, v)
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181 set(config, env.__currenthost or "*", "core", k, v);
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182 end
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183 });
371
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184
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185 rawset(env, "__currenthost", "*") -- Default is global
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186 function env.VirtualHost(name)
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187 if rawget(config, name) and rawget(config[name].core, "component_module") then
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188 error(format("Host %q clashes with previously defined %s Component %q, for services use a sub-domain like conference.%s",
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189 name, config[name].core.component_module:gsub("^%a+$", { component = "external", muc = "MUC"}), name, name), 0);
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190 end
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191 rawset(env, "__currenthost", name);
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192 -- Needs at least one setting to logically exist :)
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193 set(config, name or "*", "core", "defined", true);
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194 return function (config_options)
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195 rawset(env, "__currenthost", "*"); -- Return to global scope
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196 for option_name, option_value in pairs(config_options) do
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197 set(config, name or "*", "core", option_name, option_value);
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198 end
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199 end;
371
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200 end
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201 env.Host, env.host = env.VirtualHost, env.VirtualHost;
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202
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203 function env.Component(name)
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204 if rawget(config, name) and rawget(config[name].core, "defined") and not rawget(config[name].core, "component_module") then
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205 error(format("Component %q clashes with previously defined Host %q, for services use a sub-domain like conference.%s",
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206 name, name, name), 0);
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207 end
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208 set(config, name, "core", "component_module", "component");
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209 -- Don't load the global modules by default
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210 set(config, name, "core", "load_global_modules", false);
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211 rawset(env, "__currenthost", name);
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212 local function handle_config_options(config_options)
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213 rawset(env, "__currenthost", "*"); -- Return to global scope
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214 for option_name, option_value in pairs(config_options) do
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215 set(config, name or "*", "core", option_name, option_value);
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216 end
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diff changeset
217 end
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218
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219 return function (module)
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49298263f241 core.configmanager: Small fix to check validity of Component definitions
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220 if type(module) == "string" then
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221 set(config, name, "core", "component_module", module);
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222 return handle_config_options;
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diff changeset
223 end
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224 return handle_config_options(module);
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225 end
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226 end
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227 env.component = env.Component;
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228
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229 function env.Include(file, wildcard)
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230 if file:match("[*?]") then
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diff changeset
231 local path_pos, glob = file:match("()([^"..path_sep.."]+)$");
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232 local path = file:sub(1, math_max(path_pos-2,0));
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233 local config_path = config_file:gsub("[^"..path_sep.."]+$", "");
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234 if #path > 0 then
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235 path = resolve_relative_path(config_path, path);
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236 else
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237 path = config_path;
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238 end
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239 local patt = glob_to_pattern(glob);
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diff changeset
240 for f in lfs.dir(path) do
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diff changeset
241 if f:sub(1,1) ~= "." and f:match(patt) then
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242 env.Include(path..path_sep..f);
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243 end
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244 end
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245 else
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246 local f, err = io.open(file);
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247 if f then
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248 local data = f:read("*a");
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249 local file = resolve_relative_path(config_file:gsub("[^"..path_sep.."]+$", ""), file);
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250 local ret, err = parsers.lua.load(data, file, config);
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251 if not ret then error(err:gsub("%[string.-%]", file), 0); end
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252 end
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253 if not f then error("Error loading included "..file..": "..err, 0); end
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254 return f, err;
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diff changeset
255 end
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diff changeset
256 end
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257 env.include = env.Include;
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258
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259 function env.RunScript(file)
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260 return dofile(resolve_relative_path(config_file:gsub("[^"..path_sep.."]+$", ""), file));
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261 end
2084959d4096 configmanager: Update Include and RunScript directives to support paths relative to the (current!) config file
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262
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9222dad9e1e8 configmanager: Support for wildcards in Include directives
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263 local chunk, err = loadstring(data, "@"..config_file);
371
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264
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265 if not chunk then
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266 return nil, err;
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267 end
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268
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269 setfenv(chunk, env);
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270
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271 local ok, err = pcall(chunk);
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272
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273 if not ok then
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274 return nil, err;
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275 end
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276
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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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277 return true;
371
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278 end
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279
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280 end
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281
466
0ecfd89c2cc0 Fix for configmanager when config file can't be found
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parents: 376
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282 return _M;