/usr/share/gocode/src/github.com/kotakanbe/logrus-prefixed-formatter/formatter.go is in golang-github-kotakanbe-logrus-prefixed-formatter 0.0~git20170801.0.75edb2e8-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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import (
"bytes"
"fmt"
"io"
"os"
"runtime"
"sort"
"strings"
"sync"
"time"
"golang.org/x/crypto/ssh/terminal"
"github.com/mgutz/ansi"
"github.com/sirupsen/logrus"
)
const reset = ansi.Reset
var (
baseTimestamp time.Time
)
func init() {
baseTimestamp = time.Now()
}
func miniTS() int {
return int(time.Since(baseTimestamp) / time.Second)
}
// TextFormatter ..
type TextFormatter struct {
// Set to true to bypass checking for a TTY before outputting colors.
ForceColors bool
// Force disabling colors.
DisableColors bool
// Disable timestamp logging. useful when output is redirected to logging
// system that already adds timestamps.
DisableTimestamp bool
// Enable logging of just the time passed since beginning of execution.
ShortTimestamp bool
// Timestamp format to use for display when a full timestamp is printed.
TimestampFormat string
// The fields are sorted by default for a consistent output. For applications
// that log extremely frequently and don't use the JSON formatter this may not
// be desired.
DisableSorting bool
// Message
MsgAnsiColor string
isTerminal bool
terminalOnce sync.Once
}
func (f *TextFormatter) checkIfTerminal(w io.Writer) bool {
switch v := w.(type) {
case *os.File:
return terminal.IsTerminal(int(v.Fd()))
default:
return false
}
}
// Format ..
func (f *TextFormatter) Format(entry *logrus.Entry) ([]byte, error) {
var keys = make([]string, 0, len(entry.Data))
for k := range entry.Data {
if k != "prefix" {
keys = append(keys, k)
}
}
if !f.DisableSorting {
sort.Strings(keys)
}
b := &bytes.Buffer{}
prefixFieldClashes(entry.Data)
f.terminalOnce.Do(func() {
if entry.Logger != nil {
f.isTerminal = f.checkIfTerminal(entry.Logger.Out)
}
})
isColorTerminal := f.isTerminal && (runtime.GOOS != "windows")
isColored := (f.ForceColors || isColorTerminal) && !f.DisableColors
timestampFormat := f.TimestampFormat
if timestampFormat == "" {
timestampFormat = time.Stamp
}
if isColored {
f.printColored(b, entry, keys, timestampFormat)
} else {
if !f.DisableTimestamp {
f.appendKeyValue(b, "time", entry.Time.Format(timestampFormat))
}
f.appendKeyValue(b, "level", entry.Level.String())
if entry.Message != "" {
f.appendKeyValue(b, "msg", entry.Message)
}
for _, key := range keys {
f.appendKeyValue(b, key, entry.Data[key])
}
}
b.WriteByte('\n')
return b.Bytes(), nil
}
func (f *TextFormatter) printColored(b *bytes.Buffer, entry *logrus.Entry, keys []string, timestampFormat string) {
var levelColor string
var levelText string
switch entry.Level {
case logrus.InfoLevel:
levelColor = ansi.Green
case logrus.WarnLevel:
levelColor = ansi.Yellow
case logrus.ErrorLevel, logrus.FatalLevel, logrus.PanicLevel:
levelColor = ansi.Red
default:
levelColor = ansi.Blue
}
if entry.Level != logrus.WarnLevel {
levelText = strings.ToUpper(entry.Level.String())
} else {
levelText = "WARN"
}
if len(f.MsgAnsiColor) == 0 {
f.MsgAnsiColor = ansi.DefaultFG
}
prefix := ""
prefixValue, ok := entry.Data["prefix"]
str, _ := prefixValue.(string)
if ok && 0 < len(str) {
// prefix = fmt.Sprint(" ", ansi.Cyan, prefixValue, reset)
prefix = fmt.Sprint(f.MsgAnsiColor, " [", prefixValue, "]", reset)
}
if f.ShortTimestamp {
fmt.Fprintf(b, "%s[%04d]%s %s%+5s%s%s %s%s%s", ansi.LightBlack, miniTS(), reset, levelColor, levelText, reset, prefix, f.MsgAnsiColor, entry.Message, reset)
} else {
fmt.Fprintf(b, "%s[%s]%s %s%+5s%s%s %s%s%s", ansi.LightBlack, entry.Time.Format(timestampFormat), reset, levelColor, levelText, reset, prefix, f.MsgAnsiColor, entry.Message, reset)
}
for _, k := range keys {
v := entry.Data[k]
fmt.Fprintf(b, " %s%s%s=%+v", levelColor, k, reset, v)
}
}
func needsQuoting(text string) bool {
for _, ch := range text {
if !((ch >= 'a' && ch <= 'z') ||
(ch >= 'A' && ch <= 'Z') ||
(ch >= '0' && ch <= '9') ||
ch == '-' || ch == '.') {
return false
}
}
return true
}
func (f *TextFormatter) appendKeyValue(b *bytes.Buffer, key string, value interface{}) {
b.WriteString(key)
b.WriteByte('=')
switch value := value.(type) {
case string:
if needsQuoting(value) {
b.WriteString(value)
} else {
fmt.Fprintf(b, "%q", value)
}
case error:
errmsg := value.Error()
if needsQuoting(errmsg) {
b.WriteString(errmsg)
} else {
fmt.Fprintf(b, "%q", value)
}
default:
fmt.Fprint(b, value)
}
b.WriteByte(' ')
}
func prefixFieldClashes(data logrus.Fields) {
_, ok := data["time"]
if ok {
data["fields.time"] = data["time"]
}
_, ok = data["msg"]
if ok {
data["fields.msg"] = data["msg"]
}
_, ok = data["level"]
if ok {
data["fields.level"] = data["level"]
}
}
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