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log.go
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log.go
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package glice
import (
"fmt"
"io"
"log"
"os"
)
const LogFilename = "glice.log"
const (
AllLevel = 0
InfoLevel = 1
NoteLevel = 2
WarnLevel = 3
ErrorLevel = 4
FailLevel = 5
)
var LogLevels = []string{
"ALL",
"INFO",
"NOTE",
"WARN",
"ERROR",
"FAIL",
}
var ValidVerbositiesString = fmt.Sprintf("Verbosity: %d=%s, %d=%s, %d=%s, %d=%s, %d=%s, %d=%s",
AllLevel,
LogLevels[AllLevel],
InfoLevel,
LogLevels[InfoLevel],
NoteLevel,
LogLevels[NoteLevel],
WarnLevel,
LogLevels[WarnLevel],
ErrorLevel,
LogLevels[ErrorLevel],
FailLevel,
LogLevels[FailLevel],
)
var logFilepath = GetSourceDir(LogFilename)
var logFile *os.File
func LevelLabel(level int) (ll string) {
if ll = LogLevels[level]; ll == "" {
ll = fmt.Sprintf("INVALID_LEVEL[%d]", level)
}
return ll
}
func InitializeLogging(fp string) (err error) {
logFile, err = os.Create(fp)
if err != nil {
Warnf("Unable initialize logging; %s", err.Error())
goto end
}
log.SetOutput(logFile)
end:
return
}
func LogFilepath() string {
return logFilepath
}
//goland:noinspection GoUnusedExportedFunction
func SetLogFilepath(fp string) {
logFilepath = fp
}
func Infof(format string, args ...interface{}) {
LogWithLabelPrintf(InfoLevel, format, args...)
}
func Notef(format string, args ...interface{}) {
LogWithLabelPrintf(NoteLevel, format, args...)
}
func Warnf(format string, args ...interface{}) {
LogWithLabelPrintf(WarnLevel, format, args...)
}
func Errorf(format string, args ...interface{}) {
LogWithLabelPrintf(ErrorLevel, format, args...)
}
func Failf(status int, format string, args ...interface{}) {
LogPrintf(FailLevel, "\n")
LogWithLabelPrintf(FailLevel, format, args...)
LogPrintf(FailLevel, "\n")
os.Exit(status)
}
func LogWithLabelPrintf(level int, format string, args ...interface{}) {
if len(format) > 0 {
if format[0] == '\n' {
format = fmt.Sprintf("\n%s: %s", LevelLabel(level), format[1:])
} else {
format = fmt.Sprintf("%s: %s", LevelLabel(level), format)
}
}
LogPrintf(level, format, args...)
}
func LogPrintf(level int, format string, args ...interface{}) {
LogPrintFunc(level, func() {
fmt.Printf(format, args...)
})
}
func LoggingToFile() bool {
return logFile != nil
}
func LogPrintFunc(level int, showFunc func()) {
var out = log.Writer()
var writer io.Writer
opt := GetOptions()
logFunc := func() {
log.SetOutput(writer)
showFunc()
}
if level >= opt.VerbosityLevel {
switch {
case level > NoteLevel:
writer = os.Stderr
default:
writer = os.Stdout
}
logFunc()
}
if LoggingToFile() {
log.SetOutput(logFile)
logFunc()
}
log.SetOutput(out)
}