prosody
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core/loggingmanager.lua

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core/loggingmanager.lua @ 4140:e463e1df1bda

loggingmanager: Iterate over logging config rules using ipairs rather than pairs
author Matthew Wild <mwild1@gmail.com>
date Sun, 13 Feb 2011 18:35:39 +0000
parent 4124:3761aa844d65
child 4141:ef94984c44a0
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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, rep = string.format, string.rep;
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11 local pcall = pcall;
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12 local debug = debug;
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13 local tostring, setmetatable, rawset, pairs, ipairs, type =
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14 tostring, setmetatable, rawset, pairs, ipairs, type;
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15 local io_open, io_write = io.open, io.write;
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16 local math_max, rep = math.max, string.rep;
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17 local os_date, os_getenv = os.date, os.getenv;
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18 local getstyle, setstyle = require "util.termcolours".getstyle, require "util.termcolours".setstyle;
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19
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20 if os.getenv("__FLUSH_LOG") then
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21 local io_flush = io.flush;
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22 local _io_write = io_write;
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23 io_write = function(...) _io_write(...); io_flush(); end
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24 end
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25
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26 local config = require "core.configmanager";
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27 local logger = require "util.logger";
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28 local prosody = prosody;
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29
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30 _G.log = logger.init("general");
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31
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32 module "loggingmanager"
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33
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34 -- The log config used if none specified in the config file (see reload_logging for initialization)
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35 local default_logging;
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36 local default_file_logging;
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37 local default_timestamp = "%b %d %H:%M:%S";
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38 -- The actual config loggingmanager is using
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39 local logging_config;
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41 local apply_sink_rules;
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42 local log_sink_types = setmetatable({}, { __newindex = function (t, k, v) rawset(t, k, v); apply_sink_rules(k); end; });
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43 local get_levels;
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44 local logging_levels = { "debug", "info", "warn", "error", "critical" }
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45
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46 -- Put a rule into action. Requires that the sink type has already been registered.
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47 -- This function is called automatically when a new sink type is added [see apply_sink_rules()]
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48 local function add_rule(sink_config)
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49 local sink_maker = log_sink_types[sink_config.to];
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50 if sink_maker then
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51 if sink_config.levels and not sink_config.source then
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52 -- Create sink
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53 local sink = sink_maker(sink_config);
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54
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55 -- Set sink for all chosen levels
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56 for level in pairs(get_levels(sink_config.levels)) do
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57 logger.add_level_sink(level, sink);
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58 end
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59 elseif sink_config.source and not sink_config.levels then
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60 logger.add_name_sink(sink_config.source, sink_maker(sink_config));
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61 elseif sink_config.source and sink_config.levels then
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62 local levels = get_levels(sink_config.levels);
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63 local sink = sink_maker(sink_config);
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64 logger.add_name_sink(sink_config.source,
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65 function (name, level, ...)
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66 if levels[level] then
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67 return sink(name, level, ...);
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68 end
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69 end);
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70 else
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71 -- All sources
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72 -- Create sink
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73 local sink = sink_maker(sink_config);
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74
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75 -- Set sink for all levels
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76 for _, level in pairs(logging_levels) do
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77 logger.add_level_sink(level, sink);
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78 end
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79 end
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80 else
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81 -- No such sink type
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82 end
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83 end
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84
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85 -- Search for all rules using a particular sink type, and apply
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86 -- them. Called automatically when a new sink type is added to
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87 -- the log_sink_types table.
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88 function apply_sink_rules(sink_type)
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89 if type(logging_config) == "table" then
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90
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91 if sink_type == "file" then
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92 for _, level in ipairs(logging_levels) do
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93 if type(logging_config[level]) == "string" then
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94 add_rule({
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95 to = "file",
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96 filename = logging_config[level],
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97 timestamps = true,
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98 levels = { min = level },
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99 });
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100 end
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101 end
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102 end
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103
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104 for _, sink_config in ipairs(logging_config) do
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105 if (type(sink_config) == "table" and sink_config.to == sink_type) then
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106 add_rule(sink_config);
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107 elseif (type(sink_config) == "string" and sink_config:match("^%*(.+)") == sink_type) then
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108 add_rule({ levels = { min = "debug" }, to = sink_type });
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109 end
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110 end
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111 elseif type(logging_config) == "string" and (not logging_config:match("^%*")) and sink_type == "file" then
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112 -- User specified simply a filename, and the "file" sink type
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113 -- was just added
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114 for _, sink_config in pairs(default_file_logging) do
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115 sink_config.filename = logging_config;
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116 add_rule(sink_config);
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117 sink_config.filename = nil;
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118 end
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119 elseif type(logging_config) == "string" and logging_config:match("^%*(.+)") == sink_type then
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120 -- Log all levels (debug+) to this sink
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121 add_rule({ levels = { min = "debug" }, to = sink_type });
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122 end
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123 end
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124
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125
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126
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127 --- Helper function to get a set of levels given a "criteria" table
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128 function get_levels(criteria, set)
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129 set = set or {};
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130 if type(criteria) == "string" then
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131 set[criteria] = true;
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132 return set;
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133 end
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134 local min, max = criteria.min, criteria.max;
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135 if min or max then
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136 local in_range;
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137 for _, level in ipairs(logging_levels) do
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138 if min == level then
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139 set[level] = true;
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140 in_range = true;
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141 elseif max == level then
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142 set[level] = true;
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143 return set;
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144 elseif in_range then
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145 set[level] = true;
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146 end
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147 end
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148 end
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149
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150 for _, level in ipairs(criteria) do
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151 set[level] = true;
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152 end
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153 return set;
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154 end
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155
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156 -- Initialize config, etc. --
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157 function reload_logging()
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158 local old_sink_types = {};
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159
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160 for name, sink_maker in pairs(log_sink_types) do
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161 old_sink_types[name] = sink_maker;
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162 log_sink_types[name] = nil;
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163 end
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164
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165 logger.reset();
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166
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167 local debug_mode = config.get("*", "core", "debug");
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168
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169 default_logging = { { to = "console" , levels = { min = (debug_mode and "debug") or "info" } } };
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170 default_file_logging = {
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171 { to = "file", levels = { min = (debug_mode and "debug") or "info" }, timestamps = true }
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172 };
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173 default_timestamp = "%b %d %H:%M:%S";
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174
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175 logging_config = config.get("*", "core", "log") or default_logging;
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176
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177
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178 for name, sink_maker in pairs(old_sink_types) do
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179 log_sink_types[name] = sink_maker;
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180 end
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181
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182 prosody.events.fire_event("logging-reloaded");
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183 end
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184
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185 reload_logging();
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186 prosody.events.add_handler("config-reloaded", reload_logging);
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187
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188 --- Definition of built-in logging sinks ---
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189
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190 -- Null sink, must enter log_sink_types *first*
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191 function log_sink_types.nowhere()
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192 return function () return false; end;
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193 end
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194
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195 -- Column width for "source" (used by stdout and console)
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196 local sourcewidth = 20;
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197
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198 function log_sink_types.stdout(config)
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199 local timestamps = config.timestamps;
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200
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201 if timestamps == true then
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202 timestamps = default_timestamp; -- Default format
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203 end
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204
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205 return function (name, level, message, ...)
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206 sourcewidth = math_max(#name+2, sourcewidth);
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207 local namelen = #name;
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208 if timestamps then
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209 io_write(os_date(timestamps), " ");
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210 end
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211 if ... then
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212 io_write(name, rep(" ", sourcewidth-namelen), level, "\t", format(message, ...), "\n");
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213 else
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214 io_write(name, rep(" ", sourcewidth-namelen), level, "\t", message, "\n");
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215 end
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216 end
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217 end
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218
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219 do
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220 local do_pretty_printing = true;
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221
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222 local logstyles = {};
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223 if do_pretty_printing then
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224 logstyles["info"] = getstyle("bold");
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225 logstyles["warn"] = getstyle("bold", "yellow");
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226 logstyles["error"] = getstyle("bold", "red");
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227 end
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228 function log_sink_types.console(config)
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229 -- Really if we don't want pretty colours then just use plain stdout
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230 if not do_pretty_printing then
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231 return log_sink_types.stdout(config);
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232 end
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233
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234 local timestamps = config.timestamps;
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235
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236 if timestamps == true then
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237 timestamps = default_timestamp; -- Default format
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238 end
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239
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240 return function (name, level, message, ...)
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241 sourcewidth = math_max(#name+2, sourcewidth);
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242 local namelen = #name;
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243
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244 if timestamps then
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245 io_write(os_date(timestamps), " ");
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246 end
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247 io_write(name, rep(" ", sourcewidth-namelen));
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248 setstyle(logstyles[level]);
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249 io_write(level);
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250 setstyle();
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251 if ... then
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252 io_write("\t", format(message, ...), "\n");
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253 else
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254 io_write("\t", message, "\n");
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255 end
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256 end
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257 end
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258 end
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259
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260 local empty_function = function () end;
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261 function log_sink_types.file(config)
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262 local log = config.filename;
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263 local logfile = io_open(log, "a+");
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264 if not logfile then
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265 return empty_function;
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266 end
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267 local write, flush = logfile.write, logfile.flush;
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268
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269 local timestamps = config.timestamps;
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270
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271 if timestamps == nil or timestamps == true then
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272 timestamps = default_timestamp; -- Default format
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273 end
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274
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275 return function (name, level, message, ...)
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276 if timestamps then
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277 write(logfile, os_date(timestamps), " ");
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278 end
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279 if ... then
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280 write(logfile, name, "\t", level, "\t", format(message, ...), "\n");
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281 else
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282 write(logfile, name, "\t" , level, "\t", message, "\n");
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283 end
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284 flush(logfile);
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285 end;
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286 end
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287
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288 function register_sink_type(name, sink_maker)
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289 local old_sink_maker = log_sink_types[name];
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290 log_sink_types[name] = sink_maker;
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291 return old_sink_maker;
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292 end
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293
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294 return _M;