prosody
e6fedce399eb
core/loggingmanager.lua

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core/loggingmanager.lua @ 5199:e6fedce399eb

Merge 0.9->trunk
author Kim Alvefur <zash@zash.se>
date Fri, 23 Nov 2012 01:51:53 +0100
parent 5001:78a3d275715a
child 5272:1e555909f23d
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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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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
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10 local format = string.format;
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11 local setmetatable, rawset, pairs, ipairs, type =
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12 setmetatable, rawset, pairs, ipairs, type;
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13 local io_open, io_write = io.open, io.write;
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14 local math_max, rep = math.max, string.rep;
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15 local os_date = os.date;
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16 local getstyle, setstyle = require "util.termcolours".getstyle, require "util.termcolours".setstyle;
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17
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18 if os.getenv("__FLUSH_LOG") then
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19 local io_flush = io.flush;
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20 local _io_write = io_write;
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21 io_write = function(...) _io_write(...); io_flush(); end
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22 end
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23
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24 local config = require "core.configmanager";
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25 local logger = require "util.logger";
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26 local prosody = prosody;
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27
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28 _G.log = logger.init("general");
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29
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30 module "loggingmanager"
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31
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32 -- The log config used if none specified in the config file (see reload_logging for initialization)
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33 local default_logging;
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34 local default_file_logging;
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35 local default_timestamp = "%b %d %H:%M:%S";
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36 -- The actual config loggingmanager is using
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37 local logging_config;
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38
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39 local apply_sink_rules;
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40 local log_sink_types = setmetatable({}, { __newindex = function (t, k, v) rawset(t, k, v); apply_sink_rules(k); end; });
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41 local get_levels;
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42 local logging_levels = { "debug", "info", "warn", "error" }
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44 -- Put a rule into action. Requires that the sink type has already been registered.
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45 -- This function is called automatically when a new sink type is added [see apply_sink_rules()]
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46 local function add_rule(sink_config)
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47 local sink_maker = log_sink_types[sink_config.to];
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48 if sink_maker then
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49 -- Create sink
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50 local sink = sink_maker(sink_config);
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52 -- Set sink for all chosen levels
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53 for level in pairs(get_levels(sink_config.levels or logging_levels)) do
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54 logger.add_level_sink(level, sink);
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55 end
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56 else
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57 -- No such sink type
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58 end
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59 end
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60
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61 -- Search for all rules using a particular sink type, and apply
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62 -- them. Called automatically when a new sink type is added to
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63 -- the log_sink_types table.
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64 function apply_sink_rules(sink_type)
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65 if type(logging_config) == "table" then
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66
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67 for _, level in ipairs(logging_levels) do
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68 if type(logging_config[level]) == "string" then
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69 local value = logging_config[level];
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70 if sink_type == "file" then
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71 add_rule({
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72 to = sink_type;
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73 filename = value;
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74 timestamps = true;
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75 levels = { min = level };
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76 });
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77 elseif value == "*"..sink_type then
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78 add_rule({
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79 to = sink_type;
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80 levels = { min = level };
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81 });
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82 end
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83 end
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84 end
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85
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86 for _, sink_config in ipairs(logging_config) do
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87 if (type(sink_config) == "table" and sink_config.to == sink_type) then
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88 add_rule(sink_config);
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89 elseif (type(sink_config) == "string" and sink_config:match("^%*(.+)") == sink_type) then
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90 add_rule({ levels = { min = "debug" }, to = sink_type });
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91 end
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92 end
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93 elseif type(logging_config) == "string" and (not logging_config:match("^%*")) and sink_type == "file" then
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94 -- User specified simply a filename, and the "file" sink type
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95 -- was just added
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96 for _, sink_config in pairs(default_file_logging) do
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97 sink_config.filename = logging_config;
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98 add_rule(sink_config);
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99 sink_config.filename = nil;
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100 end
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101 elseif type(logging_config) == "string" and logging_config:match("^%*(.+)") == sink_type then
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102 -- Log all levels (debug+) to this sink
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103 add_rule({ levels = { min = "debug" }, to = sink_type });
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104 end
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105 end
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106
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107
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108
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109 --- Helper function to get a set of levels given a "criteria" table
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110 function get_levels(criteria, set)
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111 set = set or {};
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112 if type(criteria) == "string" then
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113 set[criteria] = true;
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114 return set;
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115 end
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116 local min, max = criteria.min, criteria.max;
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117 if min or max then
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118 local in_range;
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119 for _, level in ipairs(logging_levels) do
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120 if min == level then
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121 set[level] = true;
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122 in_range = true;
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123 elseif max == level then
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124 set[level] = true;
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125 return set;
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126 elseif in_range then
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127 set[level] = true;
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128 end
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129 end
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130 end
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131
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132 for _, level in ipairs(criteria) do
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133 set[level] = true;
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134 end
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135 return set;
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136 end
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137
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138 -- Initialize config, etc. --
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139 function reload_logging()
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140 local old_sink_types = {};
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141
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142 for name, sink_maker in pairs(log_sink_types) do
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143 old_sink_types[name] = sink_maker;
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144 log_sink_types[name] = nil;
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145 end
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146
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147 logger.reset();
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148
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149 local debug_mode = config.get("*", "core", "debug");
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150
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151 default_logging = { { to = "console" , levels = { min = (debug_mode and "debug") or "info" } } };
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152 default_file_logging = {
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153 { to = "file", levels = { min = (debug_mode and "debug") or "info" }, timestamps = true }
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154 };
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155 default_timestamp = "%b %d %H:%M:%S";
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156
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157 logging_config = config.get("*", "core", "log") or default_logging;
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158
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159
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160 for name, sink_maker in pairs(old_sink_types) do
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161 log_sink_types[name] = sink_maker;
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162 end
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163
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164 prosody.events.fire_event("logging-reloaded");
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165 end
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166
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167 reload_logging();
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168 prosody.events.add_handler("config-reloaded", reload_logging);
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169
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170 --- Definition of built-in logging sinks ---
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171
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172 -- Null sink, must enter log_sink_types *first*
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173 function log_sink_types.nowhere()
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174 return function () return false; end;
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175 end
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176
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177 -- Column width for "source" (used by stdout and console)
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178 local sourcewidth = 20;
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179
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180 function log_sink_types.stdout(config)
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181 local timestamps = config.timestamps;
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182
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183 if timestamps == true then
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184 timestamps = default_timestamp; -- Default format
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185 end
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186
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187 return function (name, level, message, ...)
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188 sourcewidth = math_max(#name+2, sourcewidth);
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189 local namelen = #name;
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190 if timestamps then
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191 io_write(os_date(timestamps), " ");
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192 end
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193 if ... then
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194 io_write(name, rep(" ", sourcewidth-namelen), level, "\t", format(message, ...), "\n");
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195 else
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196 io_write(name, rep(" ", sourcewidth-namelen), level, "\t", message, "\n");
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197 end
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198 end
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199 end
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200
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201 do
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202 local do_pretty_printing = true;
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203
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204 local logstyles = {};
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205 if do_pretty_printing then
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206 logstyles["info"] = getstyle("bold");
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207 logstyles["warn"] = getstyle("bold", "yellow");
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208 logstyles["error"] = getstyle("bold", "red");
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209 end
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210 function log_sink_types.console(config)
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211 -- Really if we don't want pretty colours then just use plain stdout
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212 if not do_pretty_printing then
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213 return log_sink_types.stdout(config);
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214 end
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215
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216 local timestamps = config.timestamps;
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217
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218 if timestamps == true then
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219 timestamps = default_timestamp; -- Default format
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220 end
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221
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222 return function (name, level, message, ...)
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223 sourcewidth = math_max(#name+2, sourcewidth);
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224 local namelen = #name;
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225
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226 if timestamps then
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227 io_write(os_date(timestamps), " ");
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228 end
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229 io_write(name, rep(" ", sourcewidth-namelen));
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230 setstyle(logstyles[level]);
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231 io_write(level);
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232 setstyle();
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233 if ... then
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234 io_write("\t", format(message, ...), "\n");
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235 else
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236 io_write("\t", message, "\n");
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237 end
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238 end
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239 end
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240 end
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241
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242 local empty_function = function () end;
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243 function log_sink_types.file(config)
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244 local log = config.filename;
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245 local logfile = io_open(log, "a+");
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246 if not logfile then
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247 return empty_function;
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248 end
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249 local write, flush = logfile.write, logfile.flush;
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250
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251 local timestamps = config.timestamps;
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252
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253 if timestamps == nil or timestamps == true then
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254 timestamps = default_timestamp; -- Default format
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255 end
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256
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257 return function (name, level, message, ...)
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258 if timestamps then
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259 write(logfile, os_date(timestamps), " ");
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260 end
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261 if ... then
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262 write(logfile, name, "\t", level, "\t", format(message, ...), "\n");
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263 else
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264 write(logfile, name, "\t" , level, "\t", message, "\n");
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265 end
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266 flush(logfile);
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267 end;
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268 end
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269
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270 function register_sink_type(name, sink_maker)
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271 local old_sink_maker = log_sink_types[name];
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272 log_sink_types[name] = sink_maker;
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273 return old_sink_maker;
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274 end
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275
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276 return _M;