1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
|
// Copyright 2018 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package loggers
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"log"
"os"
"regexp"
"runtime"
"time"
"github.com/gohugoio/hugo/common/terminal"
jww "github.com/spf13/jwalterweatherman"
)
var (
// Counts ERROR logs to the global jww logger.
GlobalErrorCounter *jww.Counter
)
func init() {
GlobalErrorCounter = &jww.Counter{}
jww.SetLogListeners(jww.LogCounter(GlobalErrorCounter, jww.LevelError))
}
func LoggerToWriterWithPrefix(logger *log.Logger, prefix string) io.Writer {
return prefixWriter{
logger: logger,
prefix: prefix,
}
}
type prefixWriter struct {
logger *log.Logger
prefix string
}
func (w prefixWriter) Write(p []byte) (n int, err error) {
w.logger.Printf("%s: %s", w.prefix, p)
return len(p), nil
}
// Logger wraps a *loggers.Logger and some other related logging state.
type Logger struct {
*jww.Notepad
// The writer that represents stdout.
// Will be ioutil.Discard when in quiet mode.
Out io.Writer
ErrorCounter *jww.Counter
WarnCounter *jww.Counter
// This is only set in server mode.
errors *bytes.Buffer
}
// PrintTimerIfDelayed prints a time statement to the FEEDBACK logger
// if considerable time is spent.
func (l *Logger) PrintTimerIfDelayed(start time.Time, name string) {
elapsed := time.Since(start)
milli := int(1000 * elapsed.Seconds())
if milli < 500 {
return
}
l.FEEDBACK.Printf("%s in %v ms", name, milli)
}
func (l *Logger) PrintTimer(start time.Time, name string) {
elapsed := time.Since(start)
milli := int(1000 * elapsed.Seconds())
l.FEEDBACK.Printf("%s in %v ms", name, milli)
}
func (l *Logger) Errors() string {
if l.errors == nil {
return ""
}
return ansiColorRe.ReplaceAllString(l.errors.String(), "")
}
// Reset resets the logger's internal state.
func (l *Logger) Reset() {
l.ErrorCounter.Reset()
if l.errors != nil {
l.errors.Reset()
}
}
// NewLogger creates a new Logger for the given thresholds
func NewLogger(stdoutThreshold, logThreshold jww.Threshold, outHandle, logHandle io.Writer, saveErrors bool) *Logger {
return newLogger(stdoutThreshold, logThreshold, outHandle, logHandle, saveErrors)
}
// NewDebugLogger is a convenience function to create a debug logger.
func NewDebugLogger() *Logger {
return NewBasicLogger(jww.LevelDebug)
}
// NewWarningLogger is a convenience function to create a warning logger.
func NewWarningLogger() *Logger {
return NewBasicLogger(jww.LevelWarn)
}
// NewInfoLogger is a convenience function to create a info logger.
func NewInfoLogger() *Logger {
return NewBasicLogger(jww.LevelInfo)
}
// NewErrorLogger is a convenience function to create an error logger.
func NewErrorLogger() *Logger {
return NewBasicLogger(jww.LevelError)
}
// NewBasicLogger creates a new basic logger writing to Stdout.
func NewBasicLogger(t jww.Threshold) *Logger {
return newLogger(t, jww.LevelError, os.Stdout, ioutil.Discard, false)
}
// NewBasicLoggerForWriter creates a new basic logger writing to w.
func NewBasicLoggerForWriter(t jww.Threshold, w io.Writer) *Logger {
return newLogger(t, jww.LevelError, w, ioutil.Discard, false)
}
var (
ansiColorRe = regexp.MustCompile("(?s)\\033\\[\\d*(;\\d*)*m")
errorRe = regexp.MustCompile("^(ERROR|FATAL|WARN)")
)
type ansiCleaner struct {
w io.Writer
}
func (a ansiCleaner) Write(p []byte) (n int, err error) {
return a.w.Write(ansiColorRe.ReplaceAll(p, []byte("")))
}
type labelColorizer struct {
w io.Writer
}
func (a labelColorizer) Write(p []byte) (n int, err error) {
replaced := errorRe.ReplaceAllStringFunc(string(p), func(m string) string {
switch m {
case "ERROR", "FATAL":
return terminal.Error(m)
case "WARN":
return terminal.Warning(m)
default:
return m
}
})
// io.MultiWriter will abort if we return a bigger write count than input
// bytes, so we lie a little.
_, err = a.w.Write([]byte(replaced))
return len(p), err
}
// InitGlobalLogger initializes the global logger, used in some rare cases.
func InitGlobalLogger(stdoutThreshold, logThreshold jww.Threshold, outHandle, logHandle io.Writer) {
outHandle, logHandle = getLogWriters(outHandle, logHandle)
jww.SetStdoutOutput(outHandle)
jww.SetLogOutput(logHandle)
jww.SetLogThreshold(logThreshold)
jww.SetStdoutThreshold(stdoutThreshold)
}
func getLogWriters(outHandle, logHandle io.Writer) (io.Writer, io.Writer) {
isTerm := terminal.IsTerminal(os.Stdout)
if logHandle != ioutil.Discard && isTerm {
// Remove any Ansi coloring from log output
logHandle = ansiCleaner{w: logHandle}
}
if isTerm {
outHandle = labelColorizer{w: outHandle}
}
return outHandle, logHandle
}
type fatalLogWriter int
func (s fatalLogWriter) Write(p []byte) (n int, err error) {
trace := make([]byte, 1500)
runtime.Stack(trace, true)
fmt.Printf("\n===========\n\n%s\n", trace)
os.Exit(-1)
return 0, nil
}
var fatalLogListener = func(t jww.Threshold) io.Writer {
if t != jww.LevelError {
// Only interested in ERROR
return nil
}
return new(fatalLogWriter)
}
func newLogger(stdoutThreshold, logThreshold jww.Threshold, outHandle, logHandle io.Writer, saveErrors bool) *Logger {
errorCounter := &jww.Counter{}
warnCounter := &jww.Counter{}
outHandle, logHandle = getLogWriters(outHandle, logHandle)
listeners := []jww.LogListener{jww.LogCounter(errorCounter, jww.LevelError), jww.LogCounter(warnCounter,
|