73 lines
1.4 KiB
Go
73 lines
1.4 KiB
Go
package log
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import (
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"fmt"
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"runtime"
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"strings"
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"github.com/sirupsen/logrus"
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)
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// CallerHook for log the calling file and line of the fine
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type CallerHook struct {
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Field string
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Skip int
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levels []logrus.Level
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}
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// NewCallerHook use to make a hook
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func NewCallerHook(levels ...logrus.Level) logrus.Hook {
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hook := CallerHook{
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Field: "source",
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Skip: 7,
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levels: levels,
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}
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if len(hook.levels) == 0 {
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hook.levels = logrus.AllLevels
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}
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return &hook
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}
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// Levels implement applied hook to which levels
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func (h *CallerHook) Levels() []logrus.Level {
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return logrus.AllLevels
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}
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// Fire logs the information of context (filename and line)
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func (h *CallerHook) Fire(entry *logrus.Entry) error {
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entry.Data[h.Field] = findCaller(h.Skip)
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return nil
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}
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// findCaller ignores the caller relevant to logrus or fslog then find out the exact caller
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func findCaller(skip int) string {
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file := ""
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line := 0
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for i := 0; i < 10; i++ {
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file, line = getCaller(skip + i)
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if !strings.HasPrefix(file, "logrus") && strings.Index(file, "log.go") < 0 {
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break
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}
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}
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return fmt.Sprintf("%s:%d", file, line)
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}
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func getCaller(skip int) (string, int) {
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_, file, line, ok := runtime.Caller(skip)
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// fmt.Println(file,":",line)
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if !ok {
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return "", 0
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}
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n := 0
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for i := len(file) - 1; i > 0; i-- {
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if file[i] == '/' {
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n++
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if n >= 2 {
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file = file[i+1:]
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break
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}
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}
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}
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return file, line
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}
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