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annotate pkg/log/log.go @ 5597:163f38c69a07

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Removed unused variable found by staticcheck.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Fri, 05 Aug 2022 12:25:24 +0200
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 }