cli: Do not show metrics in greeting, if disabled

Closes https://github.com/tus/tusd/issues/760

cmd/tusd/cli/greeting.go

@@ -8,6 +8,12 @@ import (
 var greeting string
 
 func PrepareGreeting() {
+	// Do not show information about metric endpoint, if it is not exposed
+	metricsInfo := ""
+	if Flags.ExposeMetrics {
+		metricsInfo = fmt.Sprintf("- %s - gather statistics to keep tusd running smoothly\n", Flags.MetricsPath)
+	}
+
 	greeting = fmt.Sprintf(
 		`Welcome to tusd
 ===============
@@ -20,15 +26,14 @@ While you did an awesome job on getting tusd running, this is just the welcome
 message, so let's talk about the places that really matter:
 
 - %s - send your tus uploads to this endpoint
-- %s - gather statistics to keep tusd running smoothly
-- https://github.com/tus/tusd/issues - report your bugs here
+%s- https://github.com/tus/tusd/issues - report your bugs here
 
 So quit lollygagging, send over your files and experience the future!
 
 Version = %s
 GitCommit = %s
 BuildDate = %s
-`, Flags.Basepath, Flags.MetricsPath, VersionName, GitCommit, BuildDate)
+`, Flags.Basepath, metricsInfo, VersionName, GitCommit, BuildDate)
 }
 
 func DisplayGreeting(w http.ResponseWriter, r *http.Request) {