Display version information if the version flag is given

config/command_line.go

@@ -28,6 +28,8 @@ var (
 	Trace = flag.Bool("trace", false, "start Wahay in tracing mode")
 	// DebugFunctionCalls contains the command line argument given for debugging
 	DebugFunctionCalls = flag.Bool("debug-function-calls", false, "trace function calls in logging")
+	// Version contains the command line argument given for version
+	Version = flag.Bool("version", false, "display version information and exit")
 )
 
 // ProcessCommandLineArguments will parse the command line, check that

main.go

@@ -1,6 +1,8 @@
 package main
 
 import (
+	"fmt"
+
 	"github.com/coyim/gotk3adapter/gdka"
 	"github.com/coyim/gotk3adapter/gliba"
 	"github.com/coyim/gotk3adapter/gtka"
@@ -35,6 +37,11 @@ func initializeLogging() {
 func main() {
 	config.ProcessCommandLineArguments()
 
+	if *config.Version {
+		fmt.Printf("Wahay (commit: %s (%s) tag: %s built: %s)\n", BuildShortCommit, BuildCommit, BuildTag, BuildTimestamp)
+		return
+	}
+
 	initializeLogging()
 
 	runClient()