Add support for timing data in JSON format. (#510)

pkg/executor/build.go

@@ -390,7 +390,11 @@ func DoBuild(opts *config.KanikoOptions) (v1.Image, error) {
 					logrus.Warnf("Unable to create benchmarking file %s: %s", benchmarkFile, err)
 				}
 				defer f.Close()
-				f.WriteString(timing.Summary())
+				s, err := timing.JSON()
+				if err != nil {
+					logrus.Warnf("Unable to write benchmark file: %s", err)
+				}
+				f.WriteString(s)
 			}
 			return sourceImage, nil
 		}

pkg/timing/timing.go

@@ -18,6 +18,7 @@ package timing
 
 import (
 	"bytes"
+	"encoding/json"
 	"sync"
 	"text/template"
 	"time"
@@ -77,6 +78,10 @@ func Summary() string {
 	return DefaultRun.Summary()
 }
 
+func JSON() (string, error) {
+	return DefaultRun.JSON()
+}
+
 // Summary outputs a summary of the specified TimedRun.
 func (tr *TimedRun) Summary() string {
 	b := bytes.Buffer{}
@@ -86,3 +91,11 @@ func (tr *TimedRun) Summary() string {
 	DefaultFormat.Execute(&b, tr.categories)
 	return b.String()
 }
+
+func (tr *TimedRun) JSON() (string, error) {
+	b, err := json.Marshal(tr.categories)
+	if err != nil {
+		return "", err
+	}
+	return string(b), nil
+}