Sat, 12 Sep 2009 03:45:19 +0500
configmanager: Assign a chunk name to config files loaded using the default config loader (fixes issues with some diagnostic tools).
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1 | -- Prosody IM |
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2 | -- Copyright (C) 2008-2009 Matthew Wild |
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3 | -- Copyright (C) 2008-2009 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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core.loggingmanager: A new manager (yay!) to manage log output
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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, getstring = require "util.termcolours".getstyle, require "util.termcolours".getstring; |
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19 | |
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20 | local config = require "core.configmanager"; |
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21 | local eventmanager = require "core.eventmanager"; |
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22 | local logger = require "util.logger"; |
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23 | local debug_mode = config.get("*", "core", "debug"); |
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24 | |
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25 | _G.log = logger.init("general"); |
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26 | |
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27 | module "loggingmanager" |
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28 | |
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29 | -- The log config used if none specified in the config file |
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30 | local default_logging = { { to = "console" } }; |
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31 | local default_file_logging = { { to = "file", levels = { min = (debug_mode and "debug") or "info" }, timestamps = true } }; |
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32 | local default_timestamp = "%b %d %T"; |
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33 | -- The actual config loggingmanager is using |
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34 | local logging_config = config.get("*", "core", "log") or default_logging; |
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35 | |
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36 | local apply_sink_rules; |
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37 | local log_sink_types = setmetatable({}, { __newindex = function (t, k, v) rawset(t, k, v); apply_sink_rules(k); end; }); |
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38 | local get_levels; |
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39 | local logging_levels = { "debug", "info", "warn", "error", "critical" } |
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40 | |
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41 | -- Put a rule into action. Requires that the sink type has already been registered. |
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42 | -- This function is called automatically when a new sink type is added [see apply_sink_rules()] |
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43 | local function add_rule(sink_config) |
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44 | local sink_maker = log_sink_types[sink_config.to]; |
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45 | if sink_maker then |
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46 | if sink_config.levels and not sink_config.source then |
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47 | -- Create sink |
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48 | local sink = sink_maker(sink_config); |
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49 | |
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50 | -- Set sink for all chosen levels |
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51 | for level in pairs(get_levels(sink_config.levels)) do |
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52 | logger.add_level_sink(level, sink); |
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53 | end |
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54 | elseif sink_config.source and not sink_config.levels then |
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55 | logger.add_name_sink(sink_config.source, sink_maker(sink_config)); |
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56 | elseif sink_config.source and sink_config.levels then |
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57 | local levels = get_levels(sink_config.levels); |
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58 | local sink = sink_maker(sink_config); |
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59 | logger.add_name_sink(sink_config.source, |
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60 | function (name, level, ...) |
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61 | if levels[level] then |
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62 | return sink(name, level, ...); |
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63 | end |
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64 | end); |
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65 | else |
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66 | -- All sources |
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67 | -- Create sink |
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68 | local sink = sink_maker(sink_config); |
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69 | |
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70 | -- Set sink for all levels |
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71 | for _, level in pairs(logging_levels) do |
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72 | logger.add_level_sink(level, sink); |
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73 | end |
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74 | end |
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75 | else |
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76 | -- No such sink type |
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77 | end |
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78 | end |
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79 | |
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80 | -- Search for all rules using a particular sink type, and apply |
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81 | -- them. Called automatically when a new sink type is added to |
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82 | -- the log_sink_types table. |
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83 | function apply_sink_rules(sink_type) |
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84 | if type(logging_config) == "table" then |
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85 | for _, sink_config in pairs(logging_config) do |
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86 | if sink_config.to == sink_type then |
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87 | add_rule(sink_config); |
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88 | end |
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89 | end |
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90 | elseif type(logging_config) == "string" and (not logging_config:match("^%*")) and sink_type == "file" then |
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91 | -- User specified simply a filename, and the "file" sink type |
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92 | -- was just added |
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93 | for _, sink_config in pairs(default_file_logging) do |
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94 | sink_config.filename = logging_config; |
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95 | add_rule(sink_config); |
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96 | sink_config.filename = nil; |
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97 | end |
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98 | elseif type(logging_config) == "string" and logging_config:match("^%*(.+)") == sink_type then |
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99 | -- Log all levels (debug+) to this sink |
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100 | add_rule({ levels = { min = "debug" }, to = sink_type }); |
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101 | end |
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102 | end |
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103 | |
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104 | |
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105 | |
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106 | --- Helper function to get a set of levels given a "criteria" table |
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107 | function get_levels(criteria, set) |
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108 | set = set or {}; |
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109 | if type(criteria) == "string" then |
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110 | set[criteria] = true; |
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111 | return set; |
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112 | end |
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113 | local min, max = criteria.min, criteria.max; |
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114 | if min or max then |
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115 | local in_range; |
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116 | for _, level in ipairs(logging_levels) do |
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117 | if min == level then |
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118 | set[level] = true; |
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119 | in_range = true; |
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120 | elseif max == level then |
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121 | set[level] = true; |
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122 | return set; |
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123 | elseif in_range then |
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124 | set[level] = true; |
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125 | end |
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126 | end |
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127 | end |
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128 | |
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129 | for _, level in ipairs(criteria) do |
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130 | set[level] = true; |
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131 | end |
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132 | return set; |
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133 | end |
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134 | |
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135 | --- Definition of built-in logging sinks --- |
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136 | |
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137 | -- Null sink, must enter log_sink_types *first* |
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138 | function log_sink_types.nowhere() |
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139 | return function () return false; end; |
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140 | end |
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141 | |
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142 | -- Column width for "source" (used by stdout and console) |
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143 | local sourcewidth = 20; |
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144 | |
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145 | function log_sink_types.stdout() |
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146 | local timestamps = config.timestamps; |
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147 | |
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148 | if timestamps == true then |
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149 | timestamps = default_timestamp; -- Default format |
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150 | end |
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151 | |
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152 | return function (name, level, message, ...) |
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153 | sourcewidth = math_max(#name+2, sourcewidth); |
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154 | local namelen = #name; |
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155 | if timestamps then |
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156 | io_write(os_date(timestamps), " "); |
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157 | end |
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158 | if ... then |
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159 | io_write(name, rep(" ", sourcewidth-namelen), level, "\t", format(message, ...), "\n"); |
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160 | else |
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161 | io_write(name, rep(" ", sourcewidth-namelen), level, "\t", message, "\n"); |
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162 | end |
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163 | end |
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164 | end |
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165 | |
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166 | do |
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167 | local do_pretty_printing = not os_getenv("WINDIR"); |
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168 | |
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169 | local logstyles = {}; |
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170 | if do_pretty_printing then |
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171 | logstyles["info"] = getstyle("bold"); |
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172 | logstyles["warn"] = getstyle("bold", "yellow"); |
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173 | logstyles["error"] = getstyle("bold", "red"); |
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174 | end |
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175 | function log_sink_types.console(config) |
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176 | -- Really if we don't want pretty colours then just use plain stdout |
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177 | if not do_pretty_printing then |
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178 | return log_sink_types.stdout(config); |
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179 | end |
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180 | |
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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), getstring(logstyles[level], level), "\t", format(message, ...), "\n"); |
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195 | else |
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196 | io_write(name, rep(" ", sourcewidth-namelen), getstring(logstyles[level], 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 | end |
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201 | |
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202 | local empty_function = function () end; |
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203 | function log_sink_types.file(config) |
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204 | local log = config.filename; |
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205 | local logfile = io_open(log, "a+"); |
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206 | if not logfile then |
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207 | return empty_function; |
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208 | end |
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209 | local write, flush = logfile.write, logfile.flush; |
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210 | |
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211 | eventmanager.add_event_hook("reopen-log-files", function () |
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212 | if logfile then |
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213 | logfile:close(); |
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214 | end |
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215 | logfile = io_open(log, "a+"); |
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216 | if not logfile then |
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217 | write, flush = empty_function, empty_function; |
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218 | else |
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219 | write, flush = logfile.write, logfile.flush; |
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220 | end |
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221 | end); |
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222 | |
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223 | local timestamps = config.timestamps; |
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224 | |
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225 | if timestamps == nil or timestamps == true then |
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226 | timestamps = default_timestamp; -- Default format |
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227 | end |
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228 | |
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229 | return function (name, level, message, ...) |
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230 | if timestamps then |
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231 | write(logfile, os_date(timestamps), " "); |
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232 | end |
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233 | if ... then |
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234 | write(logfile, name, "\t", level, "\t", format(message, ...), "\n"); |
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235 | else |
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236 | write(logfile, name, "\t" , level, "\t", message, "\n"); |
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237 | end |
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238 | flush(logfile); |
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239 | end; |
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240 | end |
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241 | |
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242 | function register_sink_type(name, sink_maker) |
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243 | local old_sink_maker = log_sink_types[name]; |
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244 | log_sink_types[name] = sink_maker; |
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245 | return old_sink_maker; |
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246 | end |
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247 | |
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248 | return _M; |