mirror of
https://github.com/ClusterCockpit/cc-backend
synced 2025-07-23 04:51:39 +02:00
Rework pkg/log, add 'loglevel' and 'logdate' flags, streamline
- removes some previously added manual location strings: now handled by pkg/log depending on loglevel - kept manual string locations on fmt print functions - add 'notice' and 'critical' loglevels - add 'Panic' and 'Panicf' functions to log panics - adresses issue #26
This commit is contained in:
Christoph Kluge
224
pkg/log/log.go
224
pkg/log/log.go
@@ -9,122 +9,274 @@ import (
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"io"
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"log"
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"os"
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"time"
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)
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// Provides a simple way of logging with different levels.
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// Time/Data are not logged on purpose because systemd adds
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// them for us.
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// Time/Date are not logged because systemd adds
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// them for us (Default, can be changed by flag '--logdate true').
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//
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// Uses these prefixes: https://www.freedesktop.org/software/systemd/man/sd-daemon.html
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var logDateTime bool
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var logLevel string
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var (
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DebugWriter io.Writer = os.Stderr
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NoteWriter io.Writer = os.Stderr
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InfoWriter io.Writer = os.Stderr
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WarnWriter io.Writer = os.Stderr
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ErrWriter io.Writer = os.Stderr
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CritWriter io.Writer = os.Stderr
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)
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var (
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DebugPrefix string = "<7>[DEBUG] "
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InfoPrefix string = "<6>[INFO] "
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WarnPrefix string = "<4>[WARNING] "
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ErrPrefix string = "<3>[ERROR] "
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DebugPrefix string = "<7>[DEBUG] "
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InfoPrefix string = "<6>[INFO] "
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NotePrefix string = "<5>[NOTICE] "
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WarnPrefix string = "<4>[WARNING] "
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ErrPrefix string = "<3>[ERROR] "
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CritPrefix string = "<2>[CRITICAL] "
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)
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var (
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// No Time/Date
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DebugLog *log.Logger = log.New(DebugWriter, DebugPrefix, 0)
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InfoLog *log.Logger = log.New(InfoWriter, InfoPrefix, 0)
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WarnLog *log.Logger = log.New(WarnWriter, WarnPrefix, 0)
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ErrLog *log.Logger = log.New(ErrWriter, ErrPrefix, 0)
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InfoLog *log.Logger = log.New(InfoWriter, InfoPrefix, 0)
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NoteLog *log.Logger = log.New(NoteWriter, NotePrefix, log.Lshortfile)
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WarnLog *log.Logger = log.New(WarnWriter, WarnPrefix, log.Lshortfile)
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ErrLog *log.Logger = log.New(ErrWriter, ErrPrefix, log.Llongfile)
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CritLog *log.Logger = log.New(CritWriter, CritPrefix, log.Llongfile)
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// Log Time/Date
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DebugTimeLog *log.Logger = log.New(DebugWriter, DebugPrefix, log.LstdFlags)
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InfoTimeLog *log.Logger = log.New(InfoWriter, InfoPrefix, log.LstdFlags)
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NoteTimeLog *log.Logger = log.New(NoteWriter, NotePrefix, log.LstdFlags|log.Lshortfile)
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WarnTimeLog *log.Logger = log.New(WarnWriter, WarnPrefix, log.LstdFlags|log.Lshortfile)
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ErrTimeLog *log.Logger = log.New(ErrWriter, ErrPrefix, log.LstdFlags|log.Llongfile)
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CritTimeLog *log.Logger = log.New(CritWriter, CritPrefix, log.LstdFlags|log.Llongfile)
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)
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func init() {
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if lvl, ok := os.LookupEnv("LOGLEVEL"); ok {
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switch lvl {
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/* CONFIG */
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func SetLogLevel(lvl string) {
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// fmt.Printf("pkg/log: Set LOGLEVEL -> %s\n", lvl)
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switch lvl {
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case "crit":
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ErrWriter = io.Discard
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fallthrough
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case "err", "fatal":
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WarnWriter = io.Discard
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fallthrough
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case "warn":
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InfoWriter = io.Discard
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fallthrough
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case "notice":
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NoteWriter = io.Discard
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fallthrough
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case "info":
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DebugWriter = io.Discard
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break
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case "debug":
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// Nothing to do...
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break
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default:
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Warnf("environment variable LOGLEVEL has invalid value %#v", lvl)
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}
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fmt.Printf("pkg/log: Flag 'loglevel' has invalid value %#v\npkg/log: Will use default loglevel 'debug'\n", lvl)
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SetLogLevel("debug")
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}
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}
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func Debug(v ...interface{}) {
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if DebugWriter != io.Discard {
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DebugLog.Print(v...)
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}
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func SetLogDateTime(logdate bool) {
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//fmt.Printf("pkg/log: Set DATEBOOL -> %v\n", logdate)
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logDateTime = logdate
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}
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func Info(v ...interface{}) {
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if InfoWriter != io.Discard {
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InfoLog.Print(v...)
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}
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/* PRINT */
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// Private helper
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func printStr(v ...interface{}) string {
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return fmt.Sprint(v...)
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}
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func Print(v ...interface{}) {
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Info(v...)
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}
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func Debug(v ...interface{}) {
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if DebugWriter != io.Discard {
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out := printStr(v...)
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if logDateTime {
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DebugTimeLog.Output(2, out)
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} else {
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DebugLog.Output(2, out)
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}
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}
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}
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func Info(v ...interface{}) {
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if InfoWriter != io.Discard {
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out := printStr(v...)
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if logDateTime {
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InfoTimeLog.Output(2, out)
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} else {
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InfoLog.Output(2, out)
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}
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}
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}
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func Note(v ...interface{}) {
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if NoteWriter != io.Discard {
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out := printStr(v...)
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if logDateTime {
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NoteTimeLog.Output(2, out)
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} else {
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NoteLog.Output(2, out)
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}
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}
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}
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func Warn(v ...interface{}) {
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if WarnWriter != io.Discard {
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WarnLog.Print(v...)
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out := printStr(v...)
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if logDateTime {
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WarnTimeLog.Output(2, out)
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} else {
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WarnLog.Output(2, out)
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}
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}
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}
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func Error(v ...interface{}) {
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if ErrWriter != io.Discard {
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ErrLog.Print(v...)
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out := printStr(v...)
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if logDateTime {
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ErrTimeLog.Output(2, out)
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} else {
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ErrLog.Output(2, out)
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}
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}
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}
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// Writes panic stacktrace, keeps application alive
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func Panic(v ...interface{}) {
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Error(v...)
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panic("Panic triggered ...")
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}
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// Writes error log, stops application
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func Fatal(v ...interface{}) {
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Error(v...)
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os.Exit(1)
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}
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func Debugf(format string, v ...interface{}) {
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if DebugWriter != io.Discard {
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DebugLog.Printf(format, v...)
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func Crit(v ...interface{}) {
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if CritWriter != io.Discard {
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out := printStr(v...)
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if logDateTime {
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CritTimeLog.Output(2, out)
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} else {
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CritLog.Output(2, out)
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}
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}
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}
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func Infof(format string, v ...interface{}) {
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if InfoWriter != io.Discard {
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InfoLog.Printf(format, v...)
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}
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/* PRINT FORMAT*/
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// Private helper
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func printfStr(format string, v ...interface{}) string {
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return fmt.Sprintf(format, v...)
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}
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func Printf(format string, v ...interface{}) {
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Infof(format, v...)
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}
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func Finfof(w io.Writer, format string, v ...interface{}) {
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if w != io.Discard {
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fmt.Fprintf(InfoWriter, InfoPrefix+format+"\n", v...)
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func Debugf(format string, v ...interface{}) {
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if DebugWriter != io.Discard {
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out := printfStr(format, v...)
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if logDateTime {
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DebugTimeLog.Output(2, out)
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} else {
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DebugLog.Output(2, out)
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}
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}
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}
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func Infof(format string, v ...interface{}) {
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if InfoWriter != io.Discard {
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out := printfStr(format, v...)
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if logDateTime {
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InfoTimeLog.Output(2, out)
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} else {
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InfoLog.Output(2, out)
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}
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}
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}
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func Notef(format string, v ...interface{}) {
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if NoteWriter != io.Discard {
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out := printfStr(format, v...)
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if logDateTime {
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NoteTimeLog.Output(2, out)
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} else {
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NoteLog.Output(2, out)
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}
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}
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}
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func Warnf(format string, v ...interface{}) {
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if WarnWriter != io.Discard {
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WarnLog.Printf(format, v...)
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out := printfStr(format, v...)
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if logDateTime {
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WarnTimeLog.Output(2, out)
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} else {
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WarnLog.Output(2, out)
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}
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}
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}
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func Errorf(format string, v ...interface{}) {
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if ErrWriter != io.Discard {
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ErrLog.Printf(format, v...)
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out := printfStr(format, v...)
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if logDateTime {
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ErrTimeLog.Output(2, out)
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} else {
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ErrLog.Output(2, out)
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}
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}
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}
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// Writes panic stacktrace, keeps application alive
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func Panicf(format string, v ...interface{}) {
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Errorf(format, v...)
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panic("Panic triggered ...")
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}
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// Writes error log, stops application
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func Fatalf(format string, v ...interface{}) {
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Errorf(format, v...)
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os.Exit(1)
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}
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func Critf(format string, v ...interface{}) {
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if CritWriter != io.Discard {
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out := printfStr(format, v...)
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if logDateTime {
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CritTimeLog.Output(2, out)
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} else {
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CritLog.Output(2, out)
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}
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}
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}
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/* SPECIAL */
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func Finfof(w io.Writer, format string, v ...interface{}) {
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if w != io.Discard {
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if logDateTime {
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currentTime := time.Now()
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fmt.Fprintf(InfoWriter, currentTime.String()+InfoPrefix+format+"\n", v...)
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} else {
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fmt.Fprintf(InfoWriter, InfoPrefix+format+"\n", v...)
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}
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}
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}
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