feat: Allow use of error object inside the notifier message/title

Related to micromata#7

Author: 0x04

cli.js

@@ -21,7 +21,10 @@ const cli = meow(`
 	                  Use "mute" to disable default sound notification.
 	                  Options: Mute, Basso, Blow, Bottle, Frog, Funk, Glass, Hero,
 	                           Morse, Ping, Pop, Purr, Sosumi, Submarine, Tink
-	                  Default: Bottle
+					  Default: Bottle
+	  --error    -e   A JavaScript code string to customize the content of the
+					  \${error} variable e.g. "error.stderr.substr(0, 9) + '...'"
+					  Default: "error.toString()"
 	  --version  -v   Displays the version number.
 	  --help     -h   Displays the help.
 
@@ -51,6 +54,10 @@ const cli = meow(`
 		sound: {
 			type: 'string',
 			alias: 's'
+		},
+		error: {
+			type: 'string',
+			alias: 'e'
 		}
 	}
 });

lib/error-notifier.js

@@ -11,6 +11,6 @@ module.exports = (command, opts) => {
 		execaPending.stdout.pipe(process.stdout);
 		execaPending.stderr.pipe(process.stderr);
 		return execaPending.then(result => resolve(result))
-			.catch(error => notifier.notify(notifierOptions(opts), () => reject(error)));
+			.catch(error => notifier.notify(notifierOptions(opts, error), () => reject(error)));
 	});
 };

lib/notifier-options.js

@@ -1,10 +1,17 @@
-module.exports = (opts) => {
-
+module.exports = (opts, error) => {
+	const errorRegExp = /\${error}/g;
+	// TODO: Implement error handling
+	const errorHandler = new Function('error', `return eval(${JSON.stringify(opts.e || opts.error || 'error.toString()')})`); // eslint-disable-line no-new-func
+	const errorReplace = (str) => (error) ? str.replace(errorRegExp, errorHandler(error)) : str;
 	const notifierOpts = {
-		title: opts.t || opts.title || 'An error has occured',
-		message: opts.m || opts.message || 'Check the terminal for more information',
+		title: errorReplace(opts.t || opts.title || 'An error has occured'),
+		message: errorReplace(opts.m || opts.message || 'Check the terminal for more information'),
 		icon: opts.i || opts.icon || '',
-		sound: opts.s || opts.sound || true
+		sound: opts.s || opts.sound || true,
+		// Defective since Windows 10 1903 Update
+		// https://github.com/mikaelbr/node-notifier/issues/277
+		// `true` is just for testing purpose - should be removed from production code
+		wait: true
 	};
 	notifierOpts.sound = /mute/i.test(notifierOpts.sound) ? false : notifierOpts.sound;