mirror of
https://github.com/gohugoio/hugo.git
synced 2024-11-29 21:52:10 -05:00
350 lines
8.3 KiB
Go
350 lines
8.3 KiB
Go
// Copyright 2020 The Hugo Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package loggers
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import (
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"bytes"
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"fmt"
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"io"
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"io/ioutil"
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"log"
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"os"
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"regexp"
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"runtime"
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"time"
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"github.com/gohugoio/hugo/common/terminal"
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jww "github.com/spf13/jwalterweatherman"
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)
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var (
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// Counts ERROR logs to the global jww logger.
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GlobalErrorCounter *jww.Counter
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PanicOnWarning bool
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)
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func init() {
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GlobalErrorCounter = &jww.Counter{}
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jww.SetLogListeners(jww.LogCounter(GlobalErrorCounter, jww.LevelError))
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}
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func LoggerToWriterWithPrefix(logger *log.Logger, prefix string) io.Writer {
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return prefixWriter{
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logger: logger,
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prefix: prefix,
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}
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}
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type prefixWriter struct {
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logger *log.Logger
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prefix string
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}
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func (w prefixWriter) Write(p []byte) (n int, err error) {
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w.logger.Printf("%s: %s", w.prefix, p)
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return len(p), nil
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}
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type Logger interface {
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Printf(format string, v ...interface{})
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Println(v ...interface{})
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PrintTimerIfDelayed(start time.Time, name string)
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Debug() *log.Logger
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Debugf(format string, v ...interface{})
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Debugln(v ...interface{})
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Info() *log.Logger
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Infof(format string, v ...interface{})
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Infoln(v ...interface{})
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Warn() *log.Logger
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Warnf(format string, v ...interface{})
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Warnln(v ...interface{})
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Error() *log.Logger
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Errorf(format string, v ...interface{})
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Errorln(v ...interface{})
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Errors() string
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Out() io.Writer
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Reset()
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// Used in tests.
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LogCounters() *LogCounters
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}
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type LogCounters struct {
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ErrorCounter *jww.Counter
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WarnCounter *jww.Counter
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}
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type logger struct {
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*jww.Notepad
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// The writer that represents stdout.
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// Will be ioutil.Discard when in quiet mode.
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out io.Writer
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logCounters *LogCounters
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// This is only set in server mode.
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errors *bytes.Buffer
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}
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func (l *logger) Printf(format string, v ...interface{}) {
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l.FEEDBACK.Printf(format, v...)
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}
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func (l *logger) Println(v ...interface{}) {
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l.FEEDBACK.Println(v...)
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}
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func (l *logger) Debug() *log.Logger {
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return l.DEBUG
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}
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func (l *logger) Debugf(format string, v ...interface{}) {
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l.DEBUG.Printf(format, v...)
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}
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func (l *logger) Debugln(v ...interface{}) {
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l.DEBUG.Println(v...)
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}
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func (l *logger) Infof(format string, v ...interface{}) {
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l.INFO.Printf(format, v...)
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}
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func (l *logger) Infoln(v ...interface{}) {
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l.INFO.Println(v...)
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}
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func (l *logger) Info() *log.Logger {
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return l.INFO
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}
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const panicOnWarningMessage = "Warning trapped. Remvove the --panicOnWarning flag to continue."
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func (l *logger) Warnf(format string, v ...interface{}) {
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l.WARN.Printf(format, v...)
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if PanicOnWarning {
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panic(panicOnWarningMessage)
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}
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}
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func (l *logger) Warnln(v ...interface{}) {
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l.WARN.Println(v...)
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if PanicOnWarning {
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panic(panicOnWarningMessage)
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}
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}
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func (l *logger) Warn() *log.Logger {
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return l.WARN
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}
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func (l *logger) Errorf(format string, v ...interface{}) {
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l.ERROR.Printf(format, v...)
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}
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func (l *logger) Errorln(v ...interface{}) {
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l.ERROR.Println(v...)
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}
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func (l *logger) Error() *log.Logger {
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return l.ERROR
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}
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func (l *logger) LogCounters() *LogCounters {
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return l.logCounters
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}
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func (l *logger) Out() io.Writer {
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return l.out
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}
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// PrintTimerIfDelayed prints a time statement to the FEEDBACK logger
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// if considerable time is spent.
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func (l *logger) PrintTimerIfDelayed(start time.Time, name string) {
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elapsed := time.Since(start)
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milli := int(1000 * elapsed.Seconds())
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if milli < 500 {
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return
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}
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l.Printf("%s in %v ms", name, milli)
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}
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func (l *logger) PrintTimer(start time.Time, name string) {
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elapsed := time.Since(start)
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milli := int(1000 * elapsed.Seconds())
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l.Printf("%s in %v ms", name, milli)
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}
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func (l *logger) Errors() string {
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if l.errors == nil {
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return ""
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}
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return ansiColorRe.ReplaceAllString(l.errors.String(), "")
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}
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// Reset resets the logger's internal state.
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func (l *logger) Reset() {
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l.logCounters.ErrorCounter.Reset()
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if l.errors != nil {
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l.errors.Reset()
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}
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}
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// NewLogger creates a new Logger for the given thresholds
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func NewLogger(stdoutThreshold, logThreshold jww.Threshold, outHandle, logHandle io.Writer, saveErrors bool) Logger {
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return newLogger(stdoutThreshold, logThreshold, outHandle, logHandle, saveErrors)
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}
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// NewDebugLogger is a convenience function to create a debug logger.
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func NewDebugLogger() Logger {
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return NewBasicLogger(jww.LevelDebug)
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}
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// NewWarningLogger is a convenience function to create a warning logger.
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func NewWarningLogger() Logger {
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return NewBasicLogger(jww.LevelWarn)
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}
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// NewInfoLogger is a convenience function to create a info logger.
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func NewInfoLogger() Logger {
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return NewBasicLogger(jww.LevelInfo)
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}
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// NewErrorLogger is a convenience function to create an error logger.
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func NewErrorLogger() Logger {
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return NewBasicLogger(jww.LevelError)
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}
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// NewBasicLogger creates a new basic logger writing to Stdout.
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func NewBasicLogger(t jww.Threshold) Logger {
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return newLogger(t, jww.LevelError, os.Stdout, ioutil.Discard, false)
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}
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// NewBasicLoggerForWriter creates a new basic logger writing to w.
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func NewBasicLoggerForWriter(t jww.Threshold, w io.Writer) Logger {
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return newLogger(t, jww.LevelError, w, ioutil.Discard, false)
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}
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var (
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ansiColorRe = regexp.MustCompile("(?s)\\033\\[\\d*(;\\d*)*m")
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errorRe = regexp.MustCompile("^(ERROR|FATAL|WARN)")
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)
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type ansiCleaner struct {
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w io.Writer
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}
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func (a ansiCleaner) Write(p []byte) (n int, err error) {
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return a.w.Write(ansiColorRe.ReplaceAll(p, []byte("")))
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}
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type labelColorizer struct {
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w io.Writer
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}
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func (a labelColorizer) Write(p []byte) (n int, err error) {
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replaced := errorRe.ReplaceAllStringFunc(string(p), func(m string) string {
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switch m {
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case "ERROR", "FATAL":
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return terminal.Error(m)
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case "WARN":
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return terminal.Warning(m)
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default:
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return m
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}
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})
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// io.MultiWriter will abort if we return a bigger write count than input
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// bytes, so we lie a little.
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_, err = a.w.Write([]byte(replaced))
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return len(p), err
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}
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// InitGlobalLogger initializes the global logger, used in some rare cases.
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func InitGlobalLogger(stdoutThreshold, logThreshold jww.Threshold, outHandle, logHandle io.Writer) {
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outHandle, logHandle = getLogWriters(outHandle, logHandle)
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jww.SetStdoutOutput(outHandle)
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jww.SetLogOutput(logHandle)
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jww.SetLogThreshold(logThreshold)
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jww.SetStdoutThreshold(stdoutThreshold)
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}
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func getLogWriters(outHandle, logHandle io.Writer) (io.Writer, io.Writer) {
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isTerm := terminal.IsTerminal(os.Stdout)
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if logHandle != ioutil.Discard && isTerm {
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// Remove any Ansi coloring from log output
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logHandle = ansiCleaner{w: logHandle}
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}
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if isTerm {
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outHandle = labelColorizer{w: outHandle}
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}
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return outHandle, logHandle
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}
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type fatalLogWriter int
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func (s fatalLogWriter) Write(p []byte) (n int, err error) {
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trace := make([]byte, 1500)
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runtime.Stack(trace, true)
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fmt.Printf("\n===========\n\n%s\n", trace)
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os.Exit(-1)
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return 0, nil
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}
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var fatalLogListener = func(t jww.Threshold) io.Writer {
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if t != jww.LevelError {
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// Only interested in ERROR
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return nil
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}
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return new(fatalLogWriter)
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}
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func newLogger(stdoutThreshold, logThreshold jww.Threshold, outHandle, logHandle io.Writer, saveErrors bool) *logger {
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errorCounter := &jww.Counter{}
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warnCounter := &jww.Counter{}
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outHandle, logHandle = getLogWriters(outHandle, logHandle)
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listeners := []jww.LogListener{jww.LogCounter(errorCounter, jww.LevelError), jww.LogCounter(warnCounter, jww.LevelWarn)}
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var errorBuff *bytes.Buffer
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if saveErrors {
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errorBuff = new(bytes.Buffer)
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errorCapture := func(t jww.Threshold) io.Writer {
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if t != jww.LevelError {
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// Only interested in ERROR
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return nil
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}
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return errorBuff
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}
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listeners = append(listeners, errorCapture)
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}
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return &logger{
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Notepad: jww.NewNotepad(stdoutThreshold, logThreshold, outHandle, logHandle, "", log.Ldate|log.Ltime, listeners...),
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out: outHandle,
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logCounters: &LogCounters{
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ErrorCounter: errorCounter,
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WarnCounter: warnCounter,
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},
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errors: errorBuff,
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}
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}
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