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// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package log
import (
"bytes"
"fmt"
"strings"
"time"
)
type Event struct {
Time time.Time
GoroutinePid string
Caller string
Filename string
Line int
Level Level
MsgSimpleText string
msgFormat string // the format and args is only valid in the caller's goroutine
msgArgs []any // they are discarded before the event is passed to the writer's channel
Stacktrace string
}
type EventFormatted struct {
Origin *Event
Msg any // the message formatted by the writer's formatter, the writer knows its type
}
type EventFormatter func(mode *WriterMode, event *Event, msgFormat string, msgArgs ...any) []byte
type logStringFormatter struct {
v LogStringer
}
var _ fmt.Formatter = logStringFormatter{}
func (l logStringFormatter) Format(f fmt.State, verb rune) {
if f.Flag('#') && verb == 'v' {
_, _ = fmt.Fprintf(f, "%#v", l.v)
return
}
_, _ = f.Write([]byte(l.v.LogString()))
}
// Copy of cheap integer to fixed-width decimal to ascii from logger.
// TODO: legacy bugs: doesn't support negative number, overflow if wid it too large.
func itoa(buf []byte, i, wid int) []byte {
var s [20]byte
bp := len(s) - 1
for i >= 10 || wid > 1 {
wid--
q := i / 10
s[bp] = byte('0' + i - q*10)
bp--
i = q
}
// i < 10
s[bp] = byte('0' + i)
return append(buf, s[bp:]...)
}
func colorSprintf(colorize bool, format string, args ...any) string {
hasColorValue := false
for _, v := range args {
if _, hasColorValue = v.(*ColoredValue); hasColorValue {
break
}
}
if colorize || !hasColorValue {
return fmt.Sprintf(format, args...)
}
noColors := make([]any, len(args))
copy(noColors, args)
for i, v := range args {
if cv, ok := v.(*ColoredValue); ok {
noColors[i] = cv.v
}
}
return fmt.Sprintf(format, noColors...)
}
// EventFormatTextMessage makes the log message for a writer with its mode. This function is a copy of the original package
func EventFormatTextMessage(mode *WriterMode, event *Event, msgFormat string, msgArgs ...any) []byte {
buf := make([]byte, 0, 1024)
t := event.Time
flags := mode.Flags.Bits()
// if log level prefixes are enabled, the message must begin with the prefix, see sd_daemon(3)
// "A line that is not prefixed will be logged at the default log level SD_INFO"
if flags&Llevelprefix != 0 {
prefix := event.Level.JournalPrefix()
buf = append(buf, prefix...)
}
buf = append(buf, mode.Prefix...)
if flags&(Ldate|Ltime|Lmicroseconds) != 0 {
if mode.Colorize {
buf = append(buf, fgCyanBytes...)
}
if flags&LUTC != 0 {
t = t.UTC()
}
if flags&Ldate != 0 {
year, month, day := t.Date()
buf = itoa(buf, year, 4)
buf = append(buf, '/')
buf = itoa(buf, int(month), 2)
buf = append(buf, '/')
buf = itoa(buf, day, 2)
buf = append(buf, ' ')
}
if flags&(Ltime|Lmicroseconds) != 0 {
hour, min, sec := t.Clock()
buf = itoa(buf, hour, 2)
buf = append(buf, ':')
buf = itoa(buf, min, 2)
buf = append(buf, ':')
buf = itoa(buf, sec, 2)
if flags&Lmicroseconds != 0 {
buf = append(buf, '.')
buf = itoa(buf, t.Nanosecond()/1e3, 6)
}
buf = append(buf, ' ')
}
if mode.Colorize {
buf = append(buf, resetBytes...)
}
}
if flags&(Lshortfile|Llongfile) != 0 {
if mode.Colorize {
buf = append(buf, fgGreenBytes...)
}
file := event.Filename
if flags&Lmedfile == Lmedfile {
startIndex := len(file) - 20
if startIndex > 0 {
file = "..." + file[startIndex:]
}
} else if flags&Lshortfile != 0 {
startIndex := strings.LastIndexByte(file, '/')
if startIndex > 0 && startIndex < len(file) {
file = file[startIndex+1:]
}
}
buf = append(buf, file...)
buf = append(buf, ':')
buf = itoa(buf, event.Line, -1)
if flags&(Lfuncname|Lshortfuncname) != 0 {
buf = append(buf, ':')
} else {
if mode.Colorize {
buf = append(buf, resetBytes...)
}
buf = append(buf, ' ')
}
}
if flags&(Lfuncname|Lshortfuncname) != 0 {
if mode.Colorize {
buf = append(buf, fgGreenBytes...)
}
funcname := event.Caller
if flags&Lshortfuncname != 0 {
lastIndex := strings.LastIndexByte(funcname, '.')
if lastIndex > 0 && len(funcname) > lastIndex+1 {
funcname = funcname[lastIndex+1:]
}
}
buf = append(buf, funcname...)
if mode.Colorize {
buf = append(buf, resetBytes...)
}
buf = append(buf, ' ')
}
if flags&(Llevel|Llevelinitial) != 0 {
level := strings.ToUpper(event.Level.String())
if mode.Colorize {
buf = append(buf, ColorBytes(levelToColor[event.Level]...)...)
}
buf = append(buf, '[')
if flags&Llevelinitial != 0 {
buf = append(buf, level[0])
} else {
buf = append(buf, level...)
}
buf = append(buf, ']')
if mode.Colorize {
buf = append(buf, resetBytes...)
}
buf = append(buf, ' ')
}
var msg []byte
// if the log needs colorizing, do it
if mode.Colorize && len(msgArgs) > 0 {
hasColorValue := false
for _, v := range msgArgs {
if _, hasColorValue = v.(*ColoredValue); hasColorValue {
break
}
}
if hasColorValue {
msg = []byte(fmt.Sprintf(msgFormat, msgArgs...))
}
}
// try to reuse the pre-formatted simple text message
if len(msg) == 0 {
msg = []byte(event.MsgSimpleText)
}
// if still no message, do the normal Sprintf for the message
if len(msg) == 0 {
msg = []byte(colorSprintf(mode.Colorize, msgFormat, msgArgs...))
}
// remove at most one trailing new line
if len(msg) > 0 && msg[len(msg)-1] == '\n' {
msg = msg[:len(msg)-1]
}
if flags&Lgopid == Lgopid {
if event.GoroutinePid != "" {
buf = append(buf, '[')
if mode.Colorize {
buf = append(buf, ColorBytes(FgHiYellow)...)
}
buf = append(buf, event.GoroutinePid...)
if mode.Colorize {
buf = append(buf, resetBytes...)
}
buf = append(buf, ']', ' ')
}
}
buf = append(buf, msg...)
if event.Stacktrace != "" && mode.StacktraceLevel <= event.Level {
lines := bytes.Split([]byte(event.Stacktrace), []byte("\n"))
for _, line := range lines {
buf = append(buf, "\n\t"...)
buf = append(buf, line...)
}
buf = append(buf, '\n')
}
buf = append(buf, '\n')
return buf
}
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