prosody
b02290fd8a75
core/loggingmanager.lua

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core/loggingmanager.lua @ 1080:b02290fd8a75

loggingmanager: Add a comment about 'nowhere' sink type
author Matthew Wild <mwild1@gmail.com>
date Thu, 30 Apr 2009 14:35:43 +0100
parent 1078:24c9ee99d900
child 1101:fb096ca4b296
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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_date, os_getenv = os.date, 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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15
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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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22 local default_file_logging = { { to = "file", levels = { min = "info" } } };
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23 local default_timestamp = "%b %d %T";
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24 -- The actual config loggingmanager is using
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25 local logging_config = config.get("*", "core", "log") or default_logging;
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27 local apply_sink_rules;
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28 local log_sink_types = setmetatable({}, { __newindex = function (t, k, v) rawset(t, k, v); apply_sink_rules(k); end; });
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29 local get_levels;
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30 local logging_levels = { "debug", "info", "warn", "error", "critical" }
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32 -- Put a rule into action. Requires that the sink type has already been registered.
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33 -- This function is called automatically when a new sink type is added [see apply_sink_rules()]
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34 local function add_rule(sink_config)
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35 local sink_maker = log_sink_types[sink_config.to];
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36 if sink_maker then
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37 if sink_config.levels and not sink_config.source then
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38 -- Create sink
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39 local sink = sink_maker(sink_config);
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40
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41 -- Set sink for all chosen levels
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42 for level in pairs(get_levels(sink_config.levels)) do
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43 logger.add_level_sink(level, sink);
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44 end
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45 elseif sink_config.source and not sink_config.levels then
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46 logger.add_name_sink(sink_config.source, sink_maker(sink_config));
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47 elseif sink_config.source and sink_config.levels then
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48 local levels = get_levels(sink_config.levels);
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49 local sink = sink_maker(sink_config);
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50 logger.add_name_sink(sink_config.source,
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51 function (name, level, ...)
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52 if levels[level] then
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53 return sink(name, level, ...);
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54 end
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55 end);
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56 else
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57 -- All sources
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58 -- Create sink
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59 local sink = sink_maker(sink_config);
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60
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61 -- Set sink for all levels
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62 for _, level in pairs(logging_levels) do
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63 logger.add_level_sink(level, sink);
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64 end
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65 end
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66 else
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67 -- No such sink type
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68 end
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69 end
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70
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71 -- Search for all rules using a particular sink type, and apply
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72 -- them. Called automatically when a new sink type is added to
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73 -- the log_sink_types table.
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74 function apply_sink_rules(sink_type)
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75 if type(logging_config) == "table" then
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76 for _, sink_config in pairs(logging_config) do
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77 if sink_config.to == sink_type then
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78 add_rule(sink_config);
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79 end
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80 end
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81 elseif type(logging_config) == "string" and (not logging_config:match("^%*")) and sink_type == "file" then
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82 -- User specified simply a filename, and the "file" sink type
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83 -- was just added
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84 for _, sink_config in pairs(default_file_logging) do
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85 sink_config.filename = logging_config;
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86 add_rule(sink_config);
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87 sink_config.filename = nil;
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88 end
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89 end
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90 end
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91
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92
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93
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94 --- Helper function to get a set of levels given a "criteria" table
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95 function get_levels(criteria, set)
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96 set = set or {};
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97 if type(criteria) == "string" then
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98 set[criteria] = true;
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99 return set;
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100 end
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101 local min, max = criteria.min, criteria.max;
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102 if min or max then
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103 local in_range;
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104 for _, level in ipairs(logging_levels) do
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105 if min == level then
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106 set[level] = true;
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107 in_range = true;
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108 elseif max == level then
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109 set[level] = true;
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110 return set;
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111 elseif in_range then
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112 set[level] = true;
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113 end
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114 end
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115 end
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116
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117 for _, level in ipairs(criteria) do
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118 set[level] = true;
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119 end
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120 return set;
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121 end
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122
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123 --- Definition of built-in logging sinks ---
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124
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125 -- Null sink, must enter log_sink_types *first*
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126 function log_sink_types.nowhere()
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127 return function () return false; end;
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128 end
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129
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130 -- Column width for "source" (used by stdout and console)
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131 local sourcewidth = 20;
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132
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133 function log_sink_types.stdout()
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134 local timestamps = config.timestamps;
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135
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136 if timestamps == true then
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137 timestamps = default_timestamp; -- Default format
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138 end
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139
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140 return function (name, level, message, ...)
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141 sourcewidth = math_max(#name+2, sourcewidth);
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142 local namelen = #name;
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143 if timestamps then
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144 io_write(os_date(timestamps), " ");
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145 end
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146 if ... then
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147 io_write(name, rep(" ", sourcewidth-namelen), level, "\t", format(message, ...), "\n");
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148 else
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149 io_write(name, rep(" ", sourcewidth-namelen), level, "\t", message, "\n");
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150 end
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151 end
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152 end
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153
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154 do
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155 local do_pretty_printing = not os_getenv("WINDIR");
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156
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157 local logstyles = {};
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158 if do_pretty_printing then
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159 logstyles["info"] = getstyle("bold");
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160 logstyles["warn"] = getstyle("bold", "yellow");
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161 logstyles["error"] = getstyle("bold", "red");
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162 end
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163 function log_sink_types.console(config)
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164 -- Really if we don't want pretty colours then just use plain stdout
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165 if not do_pretty_printing then
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166 return log_sink_types.stdout(config);
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167 end
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168
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169 local timestamps = config.timestamps;
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170
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171 if timestamps == true then
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172 timestamps = default_timestamp; -- Default format
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173 end
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174
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175 return function (name, level, message, ...)
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176 sourcewidth = math_max(#name+2, sourcewidth);
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177 local namelen = #name;
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178 if timestamps then
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179 io_write(os_date(timestamps), " ");
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180 end
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181 if ... then
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182 io_write(name, rep(" ", sourcewidth-namelen), getstring(logstyles[level], level), "\t", format(message, ...), "\n");
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183 else
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184 io_write(name, rep(" ", sourcewidth-namelen), getstring(logstyles[level], level), "\t", message, "\n");
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185 end
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186 end
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187 end
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188 end
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189
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190 function log_sink_types.file(config)
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191 local log = config.filename;
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192 local logfile = io_open(log, "a+");
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193 if not logfile then
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194 return function () end
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195 end
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196
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197 local timestamps = config.timestamps;
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198
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199 if timestamps == true then
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200 timestamps = default_timestamp; -- Default format
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201 end
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202
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203 local write, format, flush = logfile.write, format, logfile.flush;
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204 return function (name, level, message, ...)
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205 if timestamps then
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206 write(logfile, os_date(timestamps), " ");
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207 end
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208 if ... then
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209 write(logfile, name, "\t", level, "\t", format(message, ...), "\n");
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210 else
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211 write(logfile, name, "\t" , level, "\t", message, "\n");
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212 end
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213 flush(logfile);
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214 end;
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215 end
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216
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217 function register_sink_type(name, sink_maker)
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218 local old_sink_maker = log_sink_types[name];
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219 log_sink_types[name] = sink_maker;
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220 return old_sink_maker;
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221 end
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222
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223 return _M;