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ca74a6a38dfb
core/loggingmanager.lua

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core/loggingmanager.lua @ 1344:ca74a6a38dfb

loggingmanager: Log timestamps when using default file logging
author Matthew Wild <mwild1@gmail.com>
date Fri, 19 Jun 2009 17:23:17 +0100
parent 1343:a0bee511d144
child 1522:569d58d21612
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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13 local eventmanager = require "core.eventmanager";
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14 local logger = require "util.logger";
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15 local debug_mode = config.get("*", "core", "debug");
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16
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17 _G.log = logger.init("general");
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18
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19 module "loggingmanager"
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21 -- The log config used if none specified in the config file
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22 local default_logging = { { to = "console" } };
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23 local default_file_logging = { { to = "file", levels = { min = (debug_mode and "debug") or "info" }, timestamps = true } };
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24 local default_timestamp = "%b %d %T";
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25 -- The actual config loggingmanager is using
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26 local logging_config = config.get("*", "core", "log") or default_logging;
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28 local apply_sink_rules;
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29 local log_sink_types = setmetatable({}, { __newindex = function (t, k, v) rawset(t, k, v); apply_sink_rules(k); end; });
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30 local get_levels;
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31 local logging_levels = { "debug", "info", "warn", "error", "critical" }
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33 -- Put a rule into action. Requires that the sink type has already been registered.
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34 -- This function is called automatically when a new sink type is added [see apply_sink_rules()]
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35 local function add_rule(sink_config)
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36 local sink_maker = log_sink_types[sink_config.to];
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37 if sink_maker then
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38 if sink_config.levels and not sink_config.source then
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39 -- Create sink
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40 local sink = sink_maker(sink_config);
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41
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42 -- Set sink for all chosen levels
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43 for level in pairs(get_levels(sink_config.levels)) do
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44 logger.add_level_sink(level, sink);
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45 end
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46 elseif sink_config.source and not sink_config.levels then
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47 logger.add_name_sink(sink_config.source, sink_maker(sink_config));
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48 elseif sink_config.source and sink_config.levels then
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49 local levels = get_levels(sink_config.levels);
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50 local sink = sink_maker(sink_config);
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51 logger.add_name_sink(sink_config.source,
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52 function (name, level, ...)
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53 if levels[level] then
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54 return sink(name, level, ...);
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55 end
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56 end);
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57 else
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58 -- All sources
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59 -- Create sink
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60 local sink = sink_maker(sink_config);
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61
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62 -- Set sink for all levels
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63 for _, level in pairs(logging_levels) do
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64 logger.add_level_sink(level, sink);
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65 end
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66 end
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67 else
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68 -- No such sink type
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69 end
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70 end
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71
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72 -- Search for all rules using a particular sink type, and apply
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73 -- them. Called automatically when a new sink type is added to
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74 -- the log_sink_types table.
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75 function apply_sink_rules(sink_type)
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76 if type(logging_config) == "table" then
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77 for _, sink_config in pairs(logging_config) do
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78 if sink_config.to == sink_type then
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79 add_rule(sink_config);
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80 end
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81 end
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82 elseif type(logging_config) == "string" and (not logging_config:match("^%*")) and sink_type == "file" then
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83 -- User specified simply a filename, and the "file" sink type
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84 -- was just added
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85 for _, sink_config in pairs(default_file_logging) do
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86 sink_config.filename = logging_config;
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87 add_rule(sink_config);
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88 sink_config.filename = nil;
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89 end
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90 elseif type(logging_config) == "string" and logging_config:match("^%*(.+)") == sink_type then
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91 -- Log all levels (debug+) to this sink
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92 add_rule({ levels = { min = "debug" }, to = sink_type });
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93 end
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94 end
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95
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96
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97
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98 --- Helper function to get a set of levels given a "criteria" table
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99 function get_levels(criteria, set)
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100 set = set or {};
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101 if type(criteria) == "string" then
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102 set[criteria] = true;
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103 return set;
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104 end
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105 local min, max = criteria.min, criteria.max;
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106 if min or max then
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107 local in_range;
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108 for _, level in ipairs(logging_levels) do
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109 if min == level then
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110 set[level] = true;
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111 in_range = true;
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112 elseif max == level then
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113 set[level] = true;
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114 return set;
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115 elseif in_range then
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116 set[level] = true;
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117 end
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118 end
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119 end
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120
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121 for _, level in ipairs(criteria) do
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122 set[level] = true;
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123 end
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124 return set;
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125 end
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126
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127 --- Definition of built-in logging sinks ---
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128
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129 -- Null sink, must enter log_sink_types *first*
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130 function log_sink_types.nowhere()
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131 return function () return false; end;
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132 end
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133
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134 -- Column width for "source" (used by stdout and console)
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135 local sourcewidth = 20;
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136
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137 function log_sink_types.stdout()
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138 local timestamps = config.timestamps;
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139
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140 if timestamps == true then
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141 timestamps = default_timestamp; -- Default format
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142 end
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143
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144 return function (name, level, message, ...)
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145 sourcewidth = math_max(#name+2, sourcewidth);
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146 local namelen = #name;
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147 if timestamps then
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148 io_write(os_date(timestamps), " ");
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149 end
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150 if ... then
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151 io_write(name, rep(" ", sourcewidth-namelen), level, "\t", format(message, ...), "\n");
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152 else
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153 io_write(name, rep(" ", sourcewidth-namelen), level, "\t", message, "\n");
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154 end
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155 end
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156 end
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157
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158 do
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159 local do_pretty_printing = not os_getenv("WINDIR");
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160
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161 local logstyles = {};
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162 if do_pretty_printing then
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163 logstyles["info"] = getstyle("bold");
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164 logstyles["warn"] = getstyle("bold", "yellow");
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165 logstyles["error"] = getstyle("bold", "red");
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166 end
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167 function log_sink_types.console(config)
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168 -- Really if we don't want pretty colours then just use plain stdout
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169 if not do_pretty_printing then
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170 return log_sink_types.stdout(config);
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171 end
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172
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173 local timestamps = config.timestamps;
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174
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175 if timestamps == true then
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176 timestamps = default_timestamp; -- Default format
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177 end
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178
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179 return function (name, level, message, ...)
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180 sourcewidth = math_max(#name+2, sourcewidth);
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181 local namelen = #name;
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182 if timestamps then
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183 io_write(os_date(timestamps), " ");
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184 end
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185 if ... then
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186 io_write(name, rep(" ", sourcewidth-namelen), getstring(logstyles[level], level), "\t", format(message, ...), "\n");
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187 else
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188 io_write(name, rep(" ", sourcewidth-namelen), getstring(logstyles[level], level), "\t", message, "\n");
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189 end
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190 end
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191 end
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192 end
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193
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194 local empty_function = function () end;
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195 function log_sink_types.file(config)
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196 local log = config.filename;
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197 local logfile = io_open(log, "a+");
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198 if not logfile then
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199 return empty_function;
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200 end
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201 local write, flush = logfile.write, logfile.flush;
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202
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203 eventmanager.add_event_hook("reopen-log-files", function ()
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204 if logfile then
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205 logfile:close();
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206 end
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207 logfile = io_open(log, "a+");
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208 if not logfile then
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209 write, flush = empty_function, empty_function;
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210 else
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211 write, flush = logfile.write, logfile.flush;
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212 end
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213 end);
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214
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215 local timestamps = config.timestamps;
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216
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217 if timestamps == true then
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218 timestamps = default_timestamp; -- Default format
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219 end
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220
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221 return function (name, level, message, ...)
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222 if timestamps then
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223 write(logfile, os_date(timestamps), " ");
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224 end
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225 if ... then
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226 write(logfile, name, "\t", level, "\t", format(message, ...), "\n");
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227 else
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228 write(logfile, name, "\t" , level, "\t", message, "\n");
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229 end
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230 flush(logfile);
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231 end;
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232 end
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233
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234 function register_sink_type(name, sink_maker)
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235 local old_sink_maker = log_sink_types[name];
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236 log_sink_types[name] = sink_maker;
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237 return old_sink_maker;
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238 end
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239
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240 return _M;