Bring back switches "-V" and "--version". (#3384)

src/janus.c

@@ -4421,6 +4421,11 @@ gint main(int argc, char *argv[]) {
 	if(!janus_options_parse(&options, argc, argv))
 		exit(1);
 
+	if(options.print_version) {
+		janus_options_destroy();
+		exit(0);
+	}
+
 	/* Any configuration to open? */
 	if(options.config_file) {
 		config_file = g_strdup(options.config_file);

src/options.c

@@ -56,6 +56,7 @@ gboolean janus_options_parse(janus_options *options, int argc, char *argv[]) {
 		{ "token-auth-secret", 0, 0, G_OPTION_ARG_STRING, &options->token_auth_secret, "Secret to verify HMAC-signed tokens with, to be used with -A", "randomstring" },
 		{ "event-handlers", 'e', 0, G_OPTION_ARG_NONE, &options->event_handlers, "Enable event handlers", NULL },
 		{ "no-webrtc-encryption", 'w', 0, G_OPTION_ARG_NONE, &options->no_webrtc_encryption, "Disable WebRTC encryption, so no DTLS or SRTP (only for debugging!)", NULL },
+		{ "version", 'V', 0, G_OPTION_ARG_NONE, &options->print_version, "Print version and exit", NULL },
 		{ NULL, 0, 0, 0, NULL, NULL, NULL },
 	};
 

src/options.h

@@ -56,6 +56,7 @@ typedef struct janus_options {
 	const char *token_auth_secret;
 	gboolean event_handlers;
 	gboolean no_webrtc_encryption;
+	gboolean print_version;
 } janus_options;
 
 /*! \brief Helper method to parse the command line options