/
logging.go
737 lines (575 loc) · 13.2 KB
/
logging.go
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package common
import (
"encoding/json"
"flag"
"fmt"
"github.com/gookit/color"
"github.com/kardianos/service"
"io"
"log"
"os"
"os/exec"
"reflect"
"strconv"
"strings"
"sync"
"time"
)
const (
LEVEL_PROLOG = iota
LEVEL_DEBUG
LEVEL_INFO
LEVEL_WARN
LEVEL_ERROR
LEVEL_PANIC
)
var (
FlagLogVerbose *bool
FlagLogIO *bool
FlagLogFileName *string
FlagLogFileSize *int
FlagLogJson *bool
FlagLogSys *bool
FlagLogCount *int
FlagLogBreak *bool
logger logWriter
mu sync.Mutex
lastErr string
syslogLoggerCh chan<- error
syslogLogger service.Logger
gotest goTesting
logCh = NewChannel[logEntry](1000)
wgLogCh sync.WaitGroup
ColorDefault color.Color = 0
ColorDebug color.Color = ColorDefault
ColorInfo color.Color = ColorDefault
ColorWarn color.Color = color.Yellow
ColorError color.Color = color.Red
ColorPanic color.Color = color.Red
)
const (
FlagNameLogFileName = "log.file"
FlagNameLogFileSize = "log.filesize"
FlagNameLogVerbose = "log.verbose"
FlagNameLogIO = "log.io"
FlagNameLogJson = "log.json"
FlagNameLogSys = "log.sys"
FlagNameLogCount = "log.count"
FlagNameLogBreak = "log.break"
)
func init() {
FlagLogFileName = flag.String(FlagNameLogFileName, "", "filename to log file")
FlagLogFileSize = flag.Int(FlagNameLogFileSize, 5*1024*1024, "max log file size")
FlagLogVerbose = flag.Bool(FlagNameLogVerbose, false, "verbose logging")
FlagLogIO = flag.Bool(FlagNameLogIO, false, "trace logging")
FlagLogJson = flag.Bool(FlagNameLogJson, false, "JSON output")
FlagLogSys = flag.Bool(FlagNameLogSys, false, "Use OS system logger")
FlagLogCount = flag.Int(FlagNameLogCount, 1000, "log count")
FlagLogBreak = flag.Bool(FlagNameLogBreak, false, "break on error")
Events.AddListener(EventShutdown{}, func(event Event) {
Error(closeLog())
})
wgLogCh.Add(1)
go func() {
defer UnregisterGoRoutine(RegisterGoRoutine(1))
defer wgLogCh.Done()
for {
entry, ok := logCh.Get()
if !ok {
return
}
logOutput(entry)
}
}()
}
func InitTesting(t goTesting) {
gotest = t
}
type goTesting interface {
Logf(format string, args ...interface{})
Errorf(format string, args ...interface{})
}
type logEntry struct {
levelInt int
color color.Color
Clock string `json:"clock"`
Level string `json:"level"`
Runtime string `json:"runtime"`
Msg string `json:"msg"`
}
func (l *logEntry) toString(asJson bool, verbose bool) string {
if asJson {
ba, err := json.Marshal(l)
loggingError(err)
return string(ba)
} else {
if verbose {
return fmt.Sprintf("%s %s %-40.40s %s", l.Clock, FillString(l.Level, 5, false, " "), l.Runtime, l.Msg)
} else {
return l.Msg
}
}
}
type logWriter interface {
writeString(int, string)
getLogs(io.Writer) error
clearLogs() error
close()
}
type memoryWriter struct {
lines []string
}
func (this *memoryWriter) writeString(level int, txt string) {
if level == LEVEL_PROLOG {
return
}
if len(this.lines) >= *FlagLogCount {
start := len(this.lines) - *FlagLogCount + 1
this.lines = this.lines[start:]
}
this.lines = append(this.lines, txt)
}
func (this *memoryWriter) clearLogs() error {
mu.Lock()
defer mu.Unlock()
this.lines = this.lines[:0]
return nil
}
func (this *memoryWriter) getLogs(w io.Writer) error {
mu.Lock()
defer mu.Unlock()
for _, l := range this.lines {
_, err := w.Write([]byte(l))
if Error(err) {
return err
}
}
return nil
}
func (this *memoryWriter) close() {
}
func newMemoryWriter() *memoryWriter {
writer := memoryWriter{
lines: make([]string, 0),
}
return &writer
}
type fileWriter struct {
filesize int64
file *os.File
}
func (this *fileWriter) writeString(level int, txt string) {
if this.file == nil {
return
}
if this.filesize >= int64(*FlagLogFileSize) {
this.filesize = 0
if this.file != nil {
loggingError(this.file.Close())
this.file = nil
}
loggingError(FileBackup(*FlagLogFileName))
var err error
this.file, err = os.OpenFile(*FlagLogFileName, os.O_RDWR|os.O_CREATE|os.O_APPEND, DefaultFileMode)
loggingError(err)
}
ba := []byte(txt)
n, err := this.file.Write(ba)
loggingError(err)
this.filesize += int64(n)
}
func (this fileWriter) clearLogs() error {
mu.Lock()
defer mu.Unlock()
for i := *FlagIoFileBackups; i >= 0; i-- {
var src string
if *FlagIoFileBackups == 1 {
src = *FlagLogFileName + ".bak"
if !FileExists_(src) {
src = ""
}
}
if src == "" {
if i > 0 {
src = *FlagLogFileName + "." + strconv.Itoa(i)
} else {
src = *FlagLogFileName
}
}
if FileExists(src) {
err := FileDelete(src)
if Error(err) {
return err
}
}
}
return nil
}
func (this *fileWriter) getLogs(w io.Writer) error {
mu.Lock()
defer mu.Unlock()
for i := *FlagIoFileBackups; i >= 0; i-- {
var src string
if *FlagIoFileBackups == 1 {
src = *FlagLogFileName + ".bak"
if !FileExists_(src) {
src = ""
}
}
if src == "" {
if i > 0 {
src = *FlagLogFileName + "." + strconv.Itoa(i)
} else {
src = *FlagLogFileName
}
}
if !FileExists_(src) {
continue
}
file, err := os.Open(src)
if loggingError(err) {
continue
}
_, err = io.Copy(w, file)
if loggingError(err) {
continue
}
err = file.Close()
if loggingError(err) {
continue
}
}
return nil
}
func (this *fileWriter) close() {
mu.Lock()
defer mu.Unlock()
if this.file != nil {
loggingError(this.file.Close())
this.file = nil
}
}
func newFileWriter() (*fileWriter, error) {
filesize := int64(0)
if FileExists(*FlagLogFileName) {
var err error
filesize, err = FileSize(*FlagLogFileName)
if Error(err) {
return nil, err
}
}
logFile, err := os.OpenFile(*FlagLogFileName, os.O_RDWR|os.O_CREATE|os.O_APPEND, DefaultFileMode)
if Error(err) {
return nil, err
}
writer := fileWriter{
file: logFile,
filesize: filesize,
}
return &writer, nil
}
func levelToString(level int) string {
switch level {
case LEVEL_DEBUG:
return "debug"
case LEVEL_INFO:
return "info"
case LEVEL_WARN:
return "warn"
case LEVEL_ERROR:
return "error"
case LEVEL_PANIC:
return "panic"
default:
return "info"
}
}
type redirectGoLogger struct {
io.Writer
}
func (r *redirectGoLogger) Write(p []byte) (int, error) {
msg := strings.TrimSpace(string(p))
c := 0
for len(msg) > 0 {
p := strings.Index(msg, " ")
if p == -1 {
return 0, nil
}
msg = msg[p+1:]
c++
if c == 2 {
break
}
}
Error(fmt.Errorf(msg))
return len(p), nil
}
func initLog() error {
DebugFunc()
if *FlagLogFileName != "" {
var err error
logger, err = newFileWriter()
Error(err)
}
if logger == nil {
logger = newMemoryWriter()
}
log.SetOutput(&redirectGoLogger{})
if *FlagLogSys && !IsRunningInteractive() {
syslogLoggerCh = make(chan error)
var err error
syslogLogger, err = app.Service.Logger(syslogLoggerCh)
Error(err)
}
if app != nil {
prolog(fmt.Sprintf(">>> Start - %s %s %s", strings.ToUpper(app.Title), app.Version, strings.Repeat("-", 98)))
prolog(fmt.Sprintf(">>> Cmdline : %s", strings.Join(SurroundWith(os.Args, "\""), " ")))
}
return nil
}
func logOutput(entry logEntry) {
entryAsString := entry.toString(*FlagLogJson, *FlagLogVerbose)
// fileLogger or memoryLogger
if logger != nil {
logger.writeString(entry.levelInt, fmt.Sprintf("%s\n", entryAsString))
}
if entry.levelInt == LEVEL_PROLOG {
return
}
if syslogLogger != nil {
switch entry.levelInt {
case LEVEL_WARN:
Error(syslogLogger.Warning(entry.Msg))
case LEVEL_ERROR:
Error(syslogLogger.Error(entry.Msg))
case LEVEL_PANIC:
Error(syslogLogger.Error(entry.Msg))
case LEVEL_DEBUG:
fallthrough
case LEVEL_INFO:
Error(syslogLogger.Info(entry.Msg))
}
}
if gotest != nil {
switch entry.levelInt {
case LEVEL_DEBUG:
gotest.Logf(entryAsString)
case LEVEL_INFO:
gotest.Logf(entryAsString)
default:
gotest.Errorf(entryAsString)
}
} else {
if entry.color != ColorDefault {
entry.color.Println(entryAsString)
} else {
fmt.Println(entryAsString)
}
}
}
func closeLog() error {
prolog(fmt.Sprintf("<<< End - %s %s %s", strings.ToUpper(app.Title), app.Version, strings.Repeat("-", 100)))
if logger != nil {
logger.close()
}
err := logCh.Close()
if Error(err) {
return err
}
wgLogCh.Wait()
return nil
}
// logFile prints out the information
func prolog(t string, arg ...interface{}) {
if len(arg) > 0 {
t = fmt.Sprintf(t, arg...)
}
appendLog(LEVEL_PROLOG, ColorDefault, GetRuntimeInfo(1), t, nil)
}
func getRuntimePos(t string) (int, string) {
pos := 1
p := strings.Index(t, "~")
if p != -1 {
var err error
pos, err = strconv.Atoi(t[:p])
if err != nil {
return 1, t
}
t = t[p+1:]
}
return pos, t
}
// Debug prints out the information
func Debug(t string, arg ...interface{}) {
if FlagLogVerbose == nil || !*FlagLogVerbose {
return
}
if len(arg) > 0 {
t = fmt.Sprintf(t, arg...)
}
riPos, t := getRuntimePos(t)
appendLog(LEVEL_DEBUG, ColorDebug, GetRuntimeInfo(riPos), t, nil)
}
func loggingError(err error) bool {
if err != nil && logger != nil {
entry := newLogEntry(LEVEL_ERROR, ColorError, GetRuntimeInfo(1), err.Error())
logger.writeString(LEVEL_DEBUG, fmt.Sprintf("%s\n", entry.toString(*FlagLogJson, true)))
}
return err != nil
}
// DebugError prints out the error
func DebugError(err error) bool {
if FlagLogVerbose == nil || !*FlagLogVerbose {
return err != nil
}
if err != nil && !IsErrExit(err) && !IsSuppressedError(err) {
ri := GetRuntimeInfo(1)
appendLog(LEVEL_DEBUG, ColorDebug, ri, errorString(LEVEL_ERROR, ri, err), nil)
}
return err != nil
}
// Info prints out the information
func Info(t string, arg ...interface{}) {
if FlagLogVerbose == nil {
return
}
if len(arg) > 0 {
t = fmt.Sprintf(t, arg...)
}
riPos, t := getRuntimePos(t)
appendLog(LEVEL_INFO, ColorInfo, GetRuntimeInfo(riPos), t, nil)
}
func Warn(t string, arg ...interface{}) {
if FlagLogVerbose == nil || !*FlagLogVerbose {
return
}
if len(arg) > 0 {
t = fmt.Sprintf(t, arg...)
}
riPos, t := getRuntimePos(t)
appendLog(LEVEL_WARN, ColorWarn, GetRuntimeInfo(riPos), t, nil)
}
func WarnError(err error) bool {
if FlagLogVerbose == nil {
return err != nil
}
if err != nil && !IsErrExit(err) && !IsSuppressedError(err) {
ri := GetRuntimeInfo(1)
appendLog(LEVEL_WARN, ColorWarn, ri, errorString(LEVEL_ERROR, ri, err), nil)
}
return err != nil
}
func errorString(level int, ri RuntimeInfo, err error) string {
if *FlagLogVerbose {
return fmt.Sprintf("%s [%T]\n%s", err.Error(), err, ri.Stack)
}
return fmt.Sprintf("%s: %s", Capitalize(levelToString(level)), err.Error())
}
// DebugFunc prints out the current executon func
func DebugFunc(arg ...interface{}) {
if FlagLogVerbose == nil || !*FlagLogVerbose {
return
}
ri := GetRuntimeInfo(1)
t := ri.Fn + "()"
if len(arg) == 1 {
t = fmt.Sprintf("%s: %v", t, arg[0])
}
if len(arg) > 1 {
s, ok := arg[0].(string)
if ok {
t = fmt.Sprintf("%s: %s", t, fmt.Sprintf(s, arg[1:]...))
} else {
t = fmt.Sprintf("%s: %s", t, fmt.Sprintf("%v", arg[1:]...))
}
}
appendLog(LEVEL_DEBUG, ColorDebug, ri, t, nil)
}
func Panic(err error) {
if err == nil || IsErrExit(err) {
return
}
ri := GetRuntimeInfo(1)
appendLog(LEVEL_PANIC, ColorPanic, ri, errorString(LEVEL_PANIC, ri, err), err)
done()
os.Exit(1)
}
func Error(err error) bool {
if FlagLogVerbose == nil {
return err != nil
}
if err != nil && !IsErrExit(err) && !IsSuppressedError(err) {
ri := GetRuntimeInfo(1)
appendLog(LEVEL_ERROR, ColorError, ri, errorString(LEVEL_ERROR, ri, err), err)
if *FlagLogBreak {
Panic(fmt.Errorf("BREAK ON ERROR"))
}
}
return err != nil
}
func IsError(err error, target error) bool {
return err != nil && reflect.TypeOf(err) == reflect.TypeOf(target)
}
func newLogEntry(level int, color color.Color, ri RuntimeInfo, msg string) logEntry {
return logEntry{
levelInt: level,
color: color,
Level: strings.ToUpper(levelToString(level)),
Clock: time.Now().Format(DateTimeMilliMask),
Runtime: ri.String(),
Msg: Capitalize(strings.TrimRight(strings.TrimSpace(msg), "\r\n")),
}
}
func appendLog(level int, color color.Color, ri RuntimeInfo, msg string, err error) {
mu.Lock()
defer mu.Unlock()
if level >= LEVEL_ERROR {
if err.Error() == lastErr {
return
}
lastErr = err.Error()
} else {
lastErr = ""
}
entry := newLogEntry(level, color, ri, msg)
if gotest != nil {
entryAsString := entry.toString(*FlagLogJson, *FlagLogVerbose)
switch entry.levelInt {
case LEVEL_DEBUG:
gotest.Logf(entryAsString)
case LEVEL_INFO:
gotest.Logf(entryAsString)
default:
gotest.Errorf(entryAsString)
}
return
}
if level != LEVEL_PANIC && (FlagLogVerbose == nil || !*FlagLogVerbose) {
Error(logCh.Put(entry))
} else {
logOutput(entry)
}
}
func CmdToString(cmd *exec.Cmd) string {
s := SurroundWith(cmd.Args, "\"")
return strings.Join(s, " ")
}
func GetLogs(w io.Writer) error {
if logger == nil {
return fmt.Errorf("no logger")
}
return logger.getLogs(w)
}
func ClearLogs() error {
if logger == nil {
return fmt.Errorf("no logger")
}
return logger.clearLogs()
}
func LogsAvailable() bool {
return logger != nil
}
func TraceError(err error) error {
Error(err)
return err
}