CLI option and colour.

parity/cli.rs

@@ -109,6 +109,8 @@ API and Console Options:
                            [default: 8180].
   --signer-path PATH       Specify directory where Signer UIs tokens should
                            be stored. [default: $HOME/.parity/signer]
+  --no-token               By default a new system UI security token will be
+                           output on start up. This will prevent it.
 
 Sealing/Mining Options:
   --force-sealing          Force the node to author new blocks as if it were
@@ -255,6 +257,7 @@ pub struct Args {
 	pub flag_signer: bool,
 	pub flag_signer_port: u16,
 	pub flag_signer_path: String,
+	pub flag_no_token: bool,
 	pub flag_force_sealing: bool,
 	pub flag_author: String,
 	pub flag_usd_per_tx: String,

parity/main.rs

@@ -186,6 +186,13 @@ fn execute_client(conf: Configuration, spec: Spec, client_config: ClientConfig)
 	let net_settings = conf.net_settings(&spec);
 	let sync_config = conf.sync_config(&spec);
 
+	// Create and display a new token for UIs.
+	if conf.args.flag_signer && !conf.args.flag_no_token {
+		new_token(conf.directories().signer).unwrap_or_else(|e| {
+			die!("Error generating token: {:?}", e)
+		});
+	}
+
 	// Secret Store
 	let account_service = Arc::new(conf.account_service());
 

parity/signer.rs

@@ -14,6 +14,8 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
+extern crate ansi_term;
+use self::ansi_term::Colour::Red;
 use std::io;
 use std::path::PathBuf;
 use std::sync::Arc;
@@ -65,8 +67,7 @@ pub fn new_token(path: String) -> io::Result<()> {
 	let mut codes = try!(signer::AuthCodes::from_file(&path));
 	let code = try!(codes.generate_new());
 	try!(codes.to_file(&path));
-	println!("New token has been generated. Copy the code below to your Signer UI:");
-	println!("{}", code);
+	println!("This key code will authorise your System Signer UI: {}", White.bold().paint(code));
 	Ok(())
 }