From e709c5d91e35795a5bbb8289846f78d09d2f5804 Mon Sep 17 00:00:00 2001
From: guonaihong <guonaihong@qq.com>
Date: Mon, 11 Nov 2019 17:14:19 +0800
Subject: [PATCH] Allow custom caller level (#196)

To modify the Caller, you can pass a jump to a few function call stacks.

```go
package main

import (
    "github.com/rs/zerolog"
    "github.com/rs/zerolog/log"
)

func myError() {
    log.Debug().Caller(1).Str("test2", "v2").Send()
}

func foo() {
    log.Debug().Caller(2).Str("test2", "v2").Send()
}

func myError2() {
    foo()
}
func main() {
    zerolog.TimeFieldFormat = zerolog.TimeFormatUnix

    log.Debug().Caller().Str("test1", "v1").Send()
    myError()
    myError2()
}
```
---
 event.go | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/event.go b/event.go
index 9ae7c89..1402835 100644
--- a/event.go
+++ b/event.go
@@ -665,8 +665,14 @@ func (e *Event) Interface(key string, i interface{}) *Event {
 }
 
 // Caller adds the file:line of the caller with the zerolog.CallerFieldName key.
-func (e *Event) Caller() *Event {
-	return e.caller(CallerSkipFrameCount)
+// The argument skip is the number of stack frames to ascend
+// Skip If not passed, use the global variable CallerSkipFrameCount
+func (e *Event) Caller(skip ...int) *Event {
+	sk := CallerSkipFrameCount
+	if len(skip) > 0 {
+		sk = skip[0] + CallerSkipFrameCount
+	}
+	return e.caller(sk)
 }
 
 func (e *Event) caller(skip int) *Event {