Mercurial > gemma

annotate pkg/log/log.go @ 5560:f2204f91d286

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Join the log lines of imports to the log exports to recover data from them. Used in SR export to extract information that where in the meta json but now are only found in the log.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Wed, 09 Feb 2022 18:34:40 +0100
parents b4f59aef3f9e
children 1222b777f51f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 // This is Free Software under GNU Affero General Public License v >= 3.0
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2 // without warranty, see README.md and license for details.
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3 //
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4 // SPDX-License-Identifier: AGPL-3.0-or-later
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5 // License-Filename: LICENSES/AGPL-3.0.txt
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6 //
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7 // Copyright (C) 2021 by via donau
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8 // – Österreichische Wasserstraßen-Gesellschaft mbH
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9 // Software engineering by Intevation GmbH
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10 //
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11 // Author(s):
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12 // * Sascha L. Teichmann <sascha.teichmann@intevation.de>
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13
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14 package log
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15
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16 import (
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17 "fmt"
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18 lg "log"
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19 "os"
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20 "strings"
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21 "sync"
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22 "sync/atomic"
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23 )
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24
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25 type LogLevel uint32
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26
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27 const (
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28 TraceLogLevel = LogLevel(iota)
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29 DebugLogLevel
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30 InfoLogLevel
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31 WarnLogLevel
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32 ErrorLogLevel
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33 FatalLogLevel
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34 )
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35
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36 var (
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37 logLevel = uint32(InfoLogLevel)
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38 logFileMu sync.Mutex
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39 logFile *os.File
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40 )
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41
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42 func init() {
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43 lg.SetFlags(lg.LstdFlags | lg.Lshortfile)
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44 }
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45
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46 const callDepth = 2
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47
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48 func SetupLog(filename string, perm os.FileMode) error {
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49 f, err := os.OpenFile(filename, os.O_APPEND|os.O_CREATE|os.O_WRONLY, perm)
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50 if err != nil {
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51 return err
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52 }
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53 logFileMu.Lock()
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54 defer logFileMu.Unlock()
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55 if logFile != nil {
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56 logFile.Close()
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57 }
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58 logFile = f
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59 lg.SetOutput(logFile)
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60 return nil
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61 }
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62
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63 func ShutdownLog() {
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64 logFileMu.Lock()
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65 defer logFileMu.Unlock()
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66 if logFile != nil {
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67 logFile.Close()
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68 logFile = nil
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69 }
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70 lg.SetOutput(os.Stderr)
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71 }
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72
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73 func ParseLogLevel(s string) LogLevel {
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74 switch strings.ToLower(s) {
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75 case "trace":
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76 return TraceLogLevel
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77 case "debug":
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78 return DebugLogLevel
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79 case "info":
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80 return InfoLogLevel
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81 case "warn":
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82 return WarnLogLevel
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83 case "error":
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84 return ErrorLogLevel
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85 case "fatal":
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86 return FatalLogLevel
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87 default:
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88 return InfoLogLevel
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89 }
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90 }
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91
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92 func (level LogLevel) String() string {
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93 switch level {
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94 case TraceLogLevel:
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95 return "trace"
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96 case DebugLogLevel:
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97 return "debug"
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98 case InfoLogLevel:
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99 return "info"
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100 case WarnLogLevel:
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101 return "warn"
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102 case ErrorLogLevel:
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103 return "error"
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104 case FatalLogLevel:
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105 return "fatal"
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106 default:
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107 return "unknown"
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108 }
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109 }
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110
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111 func GetLogLevel() LogLevel {
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112 return LogLevel(atomic.LoadUint32(&logLevel))
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113 }
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114
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115 func SetLogLevel(level LogLevel) {
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116 atomic.StoreUint32(&logLevel, uint32(level))
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117 }
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118
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119 func Tracef(f string, args ...interface{}) {
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120 if TraceLogLevel >= GetLogLevel() {
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121 s := fmt.Sprintf(f, args...)
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122 lg.Output(callDepth, "[TRACE] "+s)
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123 }
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124 }
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125
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126 func Traceln(s string) {
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127 if TraceLogLevel >= GetLogLevel() {
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128 lg.Output(callDepth, "[TRACE] "+s)
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129 }
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130 }
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131
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132 func Debugf(f string, args ...interface{}) {
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133 if DebugLogLevel >= GetLogLevel() {
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134 s := fmt.Sprintf(f, args...)
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135 lg.Output(callDepth, "[DEBUG] "+s)
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136 }
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137 }
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138
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139 func Debugln(s string) {
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140 if DebugLogLevel >= GetLogLevel() {
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141 lg.Output(callDepth, "[DEBUG] "+s)
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142 }
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143 }
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144
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145 func Infof(f string, args ...interface{}) {
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146 if InfoLogLevel >= GetLogLevel() {
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147 s := fmt.Sprintf(f, args...)
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148 lg.Output(callDepth, "[INFO] "+s)
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149 }
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150 }
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151
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152 func Infoln(s string) {
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153 if InfoLogLevel >= GetLogLevel() {
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154 lg.Output(callDepth, "[INFO] "+s)
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155 }
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156 }
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157
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158 func Warnf(f string, args ...interface{}) {
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159 if WarnLogLevel >= GetLogLevel() {
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160 s := fmt.Sprintf(f, args...)
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161 lg.Output(callDepth, "[WARN] "+s)
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162 }
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163 }
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164
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165 func Warnln(s string) {
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166 if WarnLogLevel >= GetLogLevel() {
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167 lg.Output(callDepth, "[WARN] "+s)
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168 }
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169 }
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170
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171 func Errorf(f string, args ...interface{}) {
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172 if ErrorLogLevel >= GetLogLevel() {
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173 s := fmt.Sprintf(f, args...)
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174 lg.Output(callDepth, "[ERROR] "+s)
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175 }
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176 }
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177
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178 func Errorln(s string) {
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179 if ErrorLogLevel >= GetLogLevel() {
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180 lg.Output(callDepth, "[ERROR] "+s)
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181 }
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182 }
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183
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184 func Fatalf(f string, args ...interface{}) {
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185 if FatalLogLevel >= GetLogLevel() {
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186 s := fmt.Sprintf(f, args...)
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187 lg.Output(callDepth, "[FATAL] "+s)
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188 os.Exit(1)
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189 }
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190 }
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191
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192 func Fatalln(s string) {
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193 if FatalLogLevel >= GetLogLevel() {
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194 lg.Output(callDepth, "[FATAL] "+s)
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195 os.Exit(1)
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196 }
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197 }
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198
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199 func Panicf(f string, args ...interface{}) {
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200 s := fmt.Sprintf(f, args...)
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201 lg.Output(callDepth, "[PANIC] "+s)
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202 panic(s)
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203 }
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204
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205 func Panicln(s string) {
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206 lg.Output(callDepth, "[PANIC] "+s)
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207 panic(s)
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208 }