prosody
6c3a33e54399
core/loggingmanager.lua

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core/loggingmanager.lua @ 7136:6c3a33e54399

loggingmanager: Make initial value for width of log name configurable
author Kim Alvefur <zash@zash.se>
date Thu, 04 Feb 2016 17:51:39 +0100
parent 7135:0b614b7333f1
child 7137:4a5619a87b44
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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b7b6b1d01224 loggingmanager: Refactor the console log sink to re-use the stdout sink which in turn uses the file sink (tailcalls!)
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13 local stdout = io.stdout;
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14 local io_open = io.open;
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15 local math_max, rep = math.max, string.rep;
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16 local os_date = os.date;
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ac142f5209d9 loggingmanager: Write out color code, log level and reset code in one call
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17 local getstyle, getstring = require "util.termcolours".getstyle, require "util.termcolours".getstring;
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18
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631c47a65519 loggingmanager: Call setvbuf on output files, defaulting to line-buffered, instead of manually calling flush(). Adds 'buffer_mode' option to sink configuration for stdout, console and file sinks.
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19 -- COMPAT: This should no longer be needed since the addition of setvbuf calls
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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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30 _G.log = logger.init("general");
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31 prosody.log = logger.init("general");
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32
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33 local _ENV = nil;
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34
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35 -- The log config used if none specified in the config file (see reload_logging for initialization)
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36 local default_logging;
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37 local default_file_logging;
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38 local default_timestamp = "%b %d %H:%M:%S";
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39 -- The actual config loggingmanager is using
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40 local logging_config;
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41
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42 local apply_sink_rules;
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43 local log_sink_types = setmetatable({}, { __newindex = function (t, k, v) rawset(t, k, v); apply_sink_rules(k); end; });
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44 local get_levels;
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45 local logging_levels = { "debug", "info", "warn", "error" }
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47 -- Put a rule into action. Requires that the sink type has already been registered.
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48 -- This function is called automatically when a new sink type is added [see apply_sink_rules()]
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49 local function add_rule(sink_config)
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50 local sink_maker = log_sink_types[sink_config.to];
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51 if not sink_maker then
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52 return; -- No such sink type
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53 end
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54
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55 -- Create sink
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56 local sink = sink_maker(sink_config);
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57
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58 -- Set sink for all chosen levels
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59 for level in pairs(get_levels(sink_config.levels or logging_levels)) do
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60 logger.add_level_sink(level, sink);
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61 end
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62 end
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63
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64 -- Search for all rules using a particular sink type, and apply
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65 -- them. Called automatically when a new sink type is added to
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66 -- the log_sink_types table.
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67 function apply_sink_rules(sink_type)
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68 if type(logging_config) == "table" then
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69
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70 for _, level in ipairs(logging_levels) do
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71 if type(logging_config[level]) == "string" then
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72 local value = logging_config[level];
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73 if sink_type == "file" and not value:match("^%*") then
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74 add_rule({
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75 to = sink_type;
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76 filename = value;
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77 timestamps = true;
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78 levels = { min = level };
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79 });
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80 elseif value == "*"..sink_type then
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81 add_rule({
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82 to = sink_type;
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83 levels = { min = level };
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84 });
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85 end
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86 end
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87 end
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88
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89 for _, sink_config in ipairs(logging_config) do
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90 if (type(sink_config) == "table" and sink_config.to == sink_type) then
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91 add_rule(sink_config);
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92 elseif (type(sink_config) == "string" and sink_config:match("^%*(.+)") == sink_type) then
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93 add_rule({ levels = { min = "debug" }, to = sink_type });
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94 end
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95 end
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96 elseif type(logging_config) == "string" and (not logging_config:match("^%*")) and sink_type == "file" then
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97 -- User specified simply a filename, and the "file" sink type
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98 -- was just added
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99 for _, sink_config in pairs(default_file_logging) do
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100 sink_config.filename = logging_config;
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101 add_rule(sink_config);
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102 sink_config.filename = nil;
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103 end
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104 elseif type(logging_config) == "string" and logging_config:match("^%*(.+)") == sink_type then
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105 -- Log all levels (debug+) to this sink
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106 add_rule({ levels = { min = "debug" }, to = sink_type });
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107 end
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108 end
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109
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111
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112 --- Helper function to get a set of levels given a "criteria" table
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113 function get_levels(criteria, set)
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114 set = set or {};
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115 if type(criteria) == "string" then
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116 set[criteria] = true;
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117 return set;
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118 end
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119 local min, max = criteria.min, criteria.max;
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120 if min or max then
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121 local in_range;
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122 for _, level in ipairs(logging_levels) do
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123 if min == level then
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124 set[level] = true;
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125 in_range = true;
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126 elseif max == level then
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127 set[level] = true;
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128 return set;
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129 elseif in_range then
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130 set[level] = true;
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131 end
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132 end
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133 end
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134
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135 for _, level in ipairs(criteria) do
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136 set[level] = true;
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137 end
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138 return set;
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139 end
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140
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141 -- Initialize config, etc. --
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142 local function reload_logging()
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143 local old_sink_types = {};
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144
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145 for name, sink_maker in pairs(log_sink_types) do
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146 old_sink_types[name] = sink_maker;
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147 log_sink_types[name] = nil;
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148 end
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149
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150 logger.reset();
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151
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152 local debug_mode = config.get("*", "debug");
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153
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154 default_logging = { { to = "console" , levels = { min = (debug_mode and "debug") or "info" } } };
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155 default_file_logging = {
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156 { to = "file", levels = { min = (debug_mode and "debug") or "info" }, timestamps = true }
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157 };
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158
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159 logging_config = config.get("*", "log") or default_logging;
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160
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161 for name, sink_maker in pairs(old_sink_types) do
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162 log_sink_types[name] = sink_maker;
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163 end
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164
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165 prosody.events.fire_event("logging-reloaded");
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166 end
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167
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168 reload_logging();
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169 prosody.events.add_handler("config-reloaded", reload_logging);
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170
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171 --- Definition of built-in logging sinks ---
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172
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173 -- Null sink, must enter log_sink_types *first*
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174 local function log_to_nowhere()
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175 return function () return false; end;
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176 end
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177 log_sink_types.nowhere = log_to_nowhere;
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178
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179 local function log_to_file(sink_config, logfile)
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180 logfile = logfile or io_open(sink_config.filename, "a+");
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181 if not logfile then
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182 return log_to_nowhere(sink_config);
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183 end
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184 local write = logfile.write;
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185
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186 local timestamps = sink_config.timestamps;
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187
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188 if timestamps == true then
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189 timestamps = default_timestamp; -- Default format
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190 end
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191
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192 if sink_config.buffer_mode ~= false then
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193 logfile:setvbuf(sink_config.buffer_mode or "line");
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194 end
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195
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196 -- Column width for "source" (used by stdout and console)
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197 local sourcewidth = sink_config.source_width;
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198
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199 return function (name, level, message, ...)
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200 if timestamps then
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201 write(logfile, os_date(timestamps), " ");
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202 end
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203 if sourcewidth then
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204 sourcewidth = math_max(#name+2, sourcewidth);
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205 name = name .. rep(" ", sourcewidth-#name);
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206 else
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207 name = name .. "\t";
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208 end
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209 if ... then
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210 write(logfile, name, level, "\t", format(message, ...), "\n");
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211 else
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212 write(logfile, name, level, "\t", message, "\n");
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213 end
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214 end
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215 end
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216 log_sink_types.file = log_to_file;
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217
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218 local function log_to_stdout(sink_config)
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219 if not sink_config.timestamps then
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220 sink_config.timestamps = false;
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221 end
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diff changeset
222 if sink_config.source_width == nil then
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diff changeset
223 sink_config.source_width = 20;
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224 end
7135
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225 return log_to_file(sink_config, stdout);
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226 end
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227 log_sink_types.stdout = log_to_stdout;
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228
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229 local do_pretty_printing = true;
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230
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231 local logstyles;
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232 if do_pretty_printing then
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233 logstyles = {};
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234 logstyles["info"] = getstyle("bold");
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235 logstyles["warn"] = getstyle("bold", "yellow");
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236 logstyles["error"] = getstyle("bold", "red");
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237 end
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238
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239 local function log_to_console(sink_config)
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240 -- Really if we don't want pretty colours then just use plain stdout
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241 local logstdout = log_to_stdout(sink_config);
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242 if not do_pretty_printing then
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243 return logstdout;
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244 end
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245 return function (name, level, message, ...)
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246 local logstyle = logstyles[level];
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247 if logstyle then
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248 level = getstring(logstyle, level);
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249 end
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250 return logstdout(name, level, message, ...);
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251 end
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252 end
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253 log_sink_types.console = log_to_console;
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254
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255 local function register_sink_type(name, sink_maker)
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256 local old_sink_maker = log_sink_types[name];
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257 log_sink_types[name] = sink_maker;
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258 return old_sink_maker;
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259 end
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260
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261 return {
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262 reload_logging = reload_logging;
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263 register_sink_type = register_sink_type;
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264 }