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core/loggingmanager.lua @ 5534:522e99b898a0
Merge 0.9->trunk
author | Matthew Wild <mwild1@gmail.com> |
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date | Mon, 29 Apr 2013 00:36:04 +0100 |
parent | 5377:898454038524 |
child | 5776:bd0ff8ae98a8 |
rev | line source |
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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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43 |
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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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51 |
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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" and not value:match("^%*") 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("*", "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("*", "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; |