Added a summary flag to skip the live printing to the terminal

main.go

@@ -36,7 +36,7 @@ var (
 
 	autoOpenBrowser = kingpin.Flag("auto-open-browser", "Specify whether auto open browser to show Web charts").Bool()
 	clean           = kingpin.Flag("clean", "Clean the histogram bar once its finished. Default is true").Default("true").NegatableBool()
-
+	summary         = kingpin.Flag("summary", "Only print the summary without realtime reports").Default("false").NegatableBool()
 	url             = kingpin.Arg("url", "request url").Required().String()
 )
 
@@ -166,6 +166,11 @@ func main() {
 		return
 	}
 
+	outStream := os.Stdout
+	if *summary {
+		outStream = os.Stderr
+		isTerminal = false
+	}
 	// description
 	var desc string
 	desc = fmt.Sprintf("Benchmarking %s", *url)
@@ -176,7 +181,7 @@ func main() {
 		desc += fmt.Sprintf(" for %s", duration.String())
 	}
 	desc += fmt.Sprintf(" using %d connection(s).", *concurrency)
-	fmt.Println(desc)
+	fmt.Fprintln(outStream,desc)
 
 	// charts listener
 	var ln net.Listener
@@ -186,9 +191,9 @@ func main() {
 			errAndExit(err.Error())
 			return
 		}
-		fmt.Printf("@ Real-time charts is listening on http://%s\n", ln.Addr().String())
+		fmt.Fprintln(outStream,"@ Real-time charts is listening on http://%s", ln.Addr().String())
 	}
-	fmt.Printf("\n")
+	fmt.Fprintln(outStream,"")
 
 	// do request
 	go requester.Run()
@@ -208,6 +213,7 @@ func main() {
 	}
 
 	// terminal printer
-	printer := NewPrinter(*requests, *duration, !*clean)
+	printer := NewPrinter(*requests, *duration, !*clean, *summary)
 	printer.PrintLoop(report.Snapshot, *interval, *seconds, report.Done())
+
 }

print.go

@@ -33,10 +33,11 @@ type Printer struct {
 	pbNumStr    string
 	pbDurStr    string
 	noClean     bool
+	summary     bool
 }
 
-func NewPrinter(maxNum int64, maxDuration time.Duration, noCleanBar bool) *Printer {
+func NewPrinter(maxNum int64, maxDuration time.Duration, noCleanBar, summary bool) *Printer {
-	return &Printer{maxNum: maxNum, maxDuration: maxDuration, noClean: noCleanBar}
+	return &Printer{maxNum: maxNum, maxDuration: maxDuration, noClean: noCleanBar, summary: summary}
 }
 
 func (p *Printer) updateProgressValue(rs *SnapshotReport) {
@@ -66,6 +67,10 @@ func (p *Printer) PrintLoop(snapshot func() *SnapshotReport, interval time.Durat
 	var buf bytes.Buffer
 
 	var backCursor string
+	cl := clearLine
+	if p.summary {
+		cl = nil
+	}
 	echo := func(isFinal bool) {
 		report := snapshot()
 		p.updateProgressValue(report)
@@ -77,12 +82,12 @@ func (p *Printer) PrintLoop(snapshot func() *SnapshotReport, interval time.Durat
 		for {
 			i := bytes.IndexByte(result, '\n')
 			if i == -1 {
-				os.Stdout.Write(clearLine)
+				os.Stdout.Write(cl)
 				os.Stdout.Write(result)
 				break
 			}
 			n++
-			os.Stdout.Write(clearLine)
+			os.Stdout.Write(cl)
 			os.Stdout.Write(result[:i])
 			os.Stdout.Write([]byte("\n"))
 			result = result[i+1:]
@@ -97,7 +102,9 @@ func (p *Printer) PrintLoop(snapshot func() *SnapshotReport, interval time.Durat
 		for {
 			select {
 			case <-ticker.C:
+				if !p.summary {
 					echo(false)
+				}
 			case <-doneChan:
 				ticker.Stop()
 				break loop