PT-1534 Adding support for --version argument

src/go/pt-secure-collect/main.go

@@ -67,6 +67,8 @@ type myDefaults struct {
 }
 
 const (
+	TOOLNAME = "pt-secure-collect"
+
 	decryptCmd       = "decrypt"
 	encryptCmd       = "encrypt"
 	collectCmd       = "collect"
@@ -81,6 +83,10 @@ var (
 		"pt-summary",
 		"pt-mysql-summary --host=$mysql-host --port=$mysql-port --user=$mysql-user --password=$mysql-pass",
 	}
+
+	Build     string = "01-01-1980"
+	GoVersion string = "1.8"
+	Version   string = "3.0.1"
 )
 
 func main() {
@@ -164,12 +170,15 @@ func processCliParams(baseTempPath string, usageWriter io.Writer) (*cliOptions,
 	}
 	msg += "\n "
 
-	app := kingpin.New("pt-secure-collect", msg)
+	app := kingpin.New(TOOLNAME, msg)
 	if usageWriter != nil {
 		app.UsageWriter(usageWriter)
 		app.Terminate(nil)
 	}
 
+	// Add support for --version flag
+	app.Version(TOOLNAME + "\nVersion " + Version + "\nBuild: " + Build + " using " + GoVersion)
+
 	opts := &cliOptions{
 		CollectCommand:  app.Command(collectCmd, "Collect, sanitize, pack and encrypt data from pt-tools."),
 		DecryptCommand:  app.Command(decryptCmd, "Decrypt an encrypted file. The password will be requested from the terminal."),