Merge pull request #7 from thockin/with-call-depth

Add logr.Logger.WithCallDepth() support

Author: thockin

example/main.go

@@ -20,6 +20,7 @@ import (
 stdlog "log"
 "os"
 
+"github.com/go-logr/logr"
 "github.com/go-logr/stdr"
 )
 
@@ -31,6 +32,14 @@ func (e E) Error() string {
 return e.str
 }
 
+func Helper(log logr.Logger, msg string) {
+helper2(log, msg)
+}
+
+func helper2(log logr.Logger, msg string) {
+logr.WithCallDepth(log, 2).Info(msg)
+}
+
 func main() {
 stdr.SetVerbosity(1)
 log := stdr.NewWithOptions(stdlog.New(os.Stderr, "", stdlog.LstdFlags), stdr.Options{LogCaller: stdr.All})
@@ -40,4 +49,5 @@ func main() {
 log.V(1).V(1).Info("you should NOT see this")
 log.Error(nil, "uh oh", "trouble", true, "reasons", []float64{0.1, 0.11, 3.14})
 log.Error(E{"an error occurred"}, "goodbye", "code", -1)
+Helper(log, "thru a helper")
 }

stdr.go

@@ -263,7 +263,14 @@ func (l logger) WithValues(kvList ...interface{}) logr.Logger {
 return new
 }
 
+func (l logger) WithCallDepth(depth int) logr.Logger {
+new := l.clone()
+new.depth += depth
+return new
+}
+
 var _ logr.Logger = logger{}
+var _ logr.CallDepthLogger = logger{}
 
 // Underlier exposes access to the underlying logging implementation. Since
 // callers only have a logr.Logger, they have to know which implementation is