prosody
6fef969ff307
core/loggingmanager.lua

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core/loggingmanager.lua @ 1046:6fef969ff307

core.loggingmanager: Reinstating global log() function
author Matthew Wild <mwild1@gmail.com>
date Thu, 23 Apr 2009 02:55:31 +0100
parent 1031:ec013f93de81
child 1067:21f41b06f1d2
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1
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2 local format, rep = string.format, string.rep;
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3 local pcall = pcall;
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4 local debug = debug;
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5 local tostring, setmetatable, rawset, pairs, ipairs, type =
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6 tostring, setmetatable, rawset, pairs, ipairs, type;
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7 local io_open, io_write = io.open, io.write;
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8 local math_max, rep = math.max, string.rep;
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9 local os_getenv = os.getenv;
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10 local getstyle, getstring = require "util.termcolours".getstyle, require "util.termcolours".getstring;
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12 local config = require "core.configmanager";
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14 local logger = require "util.logger";
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16 _G.log = logger.init("general");
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17
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18 module "loggingmanager"
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20 -- The log config used if none specified in the config file
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21 local default_logging = { { to = "console" } };
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23 -- The actual config loggingmanager is using
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24 local logging_config = config.get("*", "core", "log") or default_logging;
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26 local apply_sink_rules;
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27 local log_sink_types = setmetatable({}, { __newindex = function (t, k, v) rawset(t, k, v); apply_sink_rules(k); end; });
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28 local get_levels;
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29 local logging_levels = { "debug", "info", "warn", "error", "critical" }
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31 local function add_rule(sink_config)
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32 local sink_maker = log_sink_types[sink_config.to];
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33 if sink_maker then
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34 if sink_config.levels and not sink_config.source then
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35 -- Create sink
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36 local sink = sink_maker(sink_config);
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37
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38 -- Set sink for all chosen levels
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39 for level in pairs(get_levels(sink_config.levels)) do
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40 logger.add_level_sink(level, sink);
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41 end
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42 elseif sink_config.source and not sink_config.levels then
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43 logger.add_name_sink(sink_config.source, sink_maker(sink_config));
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44 elseif sink_config.source and sink_config.levels then
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45 local levels = get_levels(sink_config.levels);
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46 local sink = sink_maker(sink_config);
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47 logger.add_name_sink(sink_config.source,
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48 function (name, level, ...)
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49 if levels[level] then
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50 return sink(name, level, ...);
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51 end
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52 end);
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53 else
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54 -- All sources
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55 -- Create sink
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56 local sink = sink_maker(sink_config);
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57
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58 -- Set sink for all levels
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59 for _, level in pairs(logging_levels) do
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60 logger.add_level_sink(level, sink);
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61 end
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62 end
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63 else
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64 -- No such sink type
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65 end
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66 end
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67
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68 -- Search for all rules using a particular sink type,
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69 -- and apply them
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70 function apply_sink_rules(sink_type)
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71 if type(logging_config) == "table" then
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72 for _, sink_config in pairs(logging_config) do
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73 if sink_config.to == sink_type then
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74 add_rule(sink_config);
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75 end
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76 end
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77 elseif type(logging_config) == "string" and sink_type == "file" then
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78 -- User specified simply a filename, and the "file" sink type
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79 -- was just added
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80 end
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81 end
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83
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84
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85 --- Helper function to get a set of levels given a "criteria" table
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86 function get_levels(criteria, set)
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87 set = set or {};
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88 if type(criteria) == "string" then
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89 set[criteria] = true;
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90 return set;
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91 end
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92 local min, max = criteria.min, criteria.max;
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93 if min or max then
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94 local in_range;
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95 for _, level in ipairs(logging_levels) do
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96 if min == level then
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97 set[level] = true;
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98 in_range = true;
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99 elseif max == level then
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100 set[level] = true;
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101 return set;
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102 elseif in_range then
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103 set[level] = true;
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104 end
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105 end
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106 end
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107
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108 for _, level in ipairs(criteria) do
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109 set[level] = true;
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110 end
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111 return set;
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112 end
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113
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114 --- Definition of built-in logging sinks ---
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115
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116 function log_sink_types.nowhere()
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117 return function () return false; end;
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118 end
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119
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120 -- Column width for "source" (used by stdout and console)
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121 local sourcewidth = 20;
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122
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123 function log_sink_types.stdout()
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124 return function (name, level, message, ...)
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125 sourcewidth = math_max(#name+2, sourcewidth);
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126 local namelen = #name;
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127 if ... then
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128 io_write(name, rep(" ", sourcewidth-namelen), level, "\t", format(message, ...), "\n");
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129 else
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130 io_write(name, rep(" ", sourcewidth-namelen), level, "\t", message, "\n");
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131 end
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132 end
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133 end
1021
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134
1031
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135 do
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136 local do_pretty_printing = not os_getenv("WINDIR");
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137
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138 local logstyles = {};
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139 if do_pretty_printing then
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140 logstyles["info"] = getstyle("bold");
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141 logstyles["warn"] = getstyle("bold", "yellow");
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142 logstyles["error"] = getstyle("bold", "red");
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143 end
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144 function log_sink_types.console(config)
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145 -- Really if we don't want pretty colours then just use plain stdout
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146 if not do_pretty_printing then
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147 return log_sink_types.stdout(config);
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148 end
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149
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150 return function (name, level, message, ...)
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151 sourcewidth = math_max(#name+2, sourcewidth);
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152 local namelen = #name;
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153 if ... then
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154 io_write(name, rep(" ", sourcewidth-namelen), getstring(logstyles[level], level), "\t", format(message, ...), "\n");
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155 else
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156 io_write(name, rep(" ", sourcewidth-namelen), getstring(logstyles[level], level), "\t", message, "\n");
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157 end
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158 end
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159 end
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160 end
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161
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162 function log_sink_types.file(config)
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163 local log = config.filename;
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164 local logfile = io_open(log, "a+");
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165 if not logfile then
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166 return function () end
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167 end
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168
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169 local write, format, flush = logfile.write, format, logfile.flush;
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170 return function (name, level, message, ...)
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171 if ... then
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172 write(logfile, name, "\t", level, "\t", format(message, ...), "\n");
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173 else
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174 write(logfile, name, "\t" , level, "\t", message, "\n");
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175 end
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176 flush(logfile);
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177 end;
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178 end
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179
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180 function register_sink_type(name, sink_maker)
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181 local old_sink_maker = log_sink_types[name];
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182 log_sink_types[name] = sink_maker;
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183 return old_sink_maker;
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184 end
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185
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186 return _M;