refactor: Set emptyHostnameLabel var inside app

Signed-off-by: Mahendra Paipuri <[email protected]>

pkg/collector/cli.go

@@ -37,10 +37,7 @@ var BatchJobExporterApp = *kingpin.New(
 )
 
 // Empty hostname flag (Used only for testing)
-var emptyHostnameLabel = BatchJobExporterApp.Flag(
-	"collector.empty.hostname.label",
-	"Use empty hostname in labels. Only for testing. (default is disabled)",
-).Hidden().Default("false").Bool()
+var emptyHostnameLabel *bool
 
 // Create a new BatchJobExporter struct
 func NewBatchJobExporter() (*BatchJobExporter, error) {
@@ -97,6 +94,12 @@ func (b *BatchJobExporter) Main() {
 		toolkitFlags = kingpinflag.AddFlags(&b.App, ":9010")
 	)
 
+	// This is hidden flag only used for e2e testing
+	emptyHostnameLabel = b.App.Flag(
+		"collector.empty.hostname.label",
+		"Use empty hostname in labels. Only for testing. (default is disabled)",
+	).Hidden().Default("false").Bool()
+
 	promlogConfig := &promlog.Config{}
 	flag.AddFlags(&b.App, promlogConfig)
 	b.App.Version(version.Print(b.appName))