91 lines
2.3 KiB
Go
91 lines
2.3 KiB
Go
// Package slog is a super simple logger that allows a few convenience methods
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// for handling debug vs warning/error logs. It also adds a few conveniences for
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// handling errors.
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package slog
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import (
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"log"
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"os"
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)
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var (
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// DebugLevel indicates if we should log at the debug level
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DebugLevel = true
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// Default set of flags to use
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defaultFlags = log.LstdFlags | log.Lmsgprefix
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// Loggers for various levels. Prefixes are padded to align logged content
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loggerInfo = log.New(os.Stderr, "INFO ", defaultFlags)
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loggerWarning = log.New(os.Stderr, "WARNING ", defaultFlags)
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loggerError = log.New(os.Stderr, "ERROR ", defaultFlags)
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loggerDebug = log.New(os.Stderr, "DEBUG ", defaultFlags)
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// Convenience for calling functions for all loggers in one method
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allLoggers = []*log.Logger{
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loggerInfo,
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loggerWarning,
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loggerError,
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loggerDebug,
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}
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)
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// SetFlags allows changing the logger flags using flags found in `log`
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func SetFlags(flag int) {
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for _, logger := range allLoggers {
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logger.SetFlags(flag)
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}
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}
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// Log formats logs directly to the main logger
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func Log(format string, v ...interface{}) {
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log.Printf(format, v...)
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}
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// Info formats logs with an INFO prefix
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func Info(format string, v ...interface{}) {
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loggerInfo.Printf(format, v...)
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}
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// Warning will log with a WARNING prefix
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func Warning(format string, v ...interface{}) {
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loggerWarning.Printf(format, v...)
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}
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// Error will log with a ERROR prefix
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func Error(format string, v ...interface{}) {
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loggerError.Printf(format, v...)
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}
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// Debug will log with a DEBUG prefix if DebugLevel is set
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func Debug(format string, v ...interface{}) {
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if !DebugLevel {
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return
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}
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loggerDebug.Printf(format, v...)
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}
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// WarnOnErr if error provided, will provide a warning if an error is provided
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func WarnOnErr(err error, format string, v ...interface{}) {
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if err != nil {
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loggerWarning.Printf(format, v...)
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loggerError.Print(err)
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}
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}
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// FatalOnErr if error provided, will log out details of an error and exit
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func FatalOnErr(err error, format string, v ...interface{}) {
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if err != nil {
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loggerError.Printf(format, v...)
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loggerError.Fatal(err)
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}
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}
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// PanicOnErr if error provided, will log out details of an error and exit
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func PanicOnErr(err error, format string, v ...interface{}) {
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if err != nil {
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loggerError.Printf(format, v...)
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loggerError.Panic(err)
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}
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}
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