Exit when ESC is pressed (#10)

* Added exit on ESC key pressed.

* Moved ESC handler + added test.

Author: darahak

index.js

@@ -86,6 +86,14 @@ module.exports = function (p, exec, log, cwd, tasks, options) {
 				choices: promptChoices
 			}
 		};
+
+		p.stdin.setEncoding('utf8');
+		p.stdin.on('data', function (chunk) {
+			if (chunk === '\u001b') { // ESC
+				p.exit(0);
+			}
+		});
+
 		return prompt(
 			options.multiple ? promptTypes.multiple : promptTypes.base,
 			onPrompt
@@ -100,4 +108,3 @@ module.exports = function (p, exec, log, cwd, tasks, options) {
 		return showList();
 	}
 };
-

test/index.js

@@ -243,3 +243,14 @@ test.cb(function shouldExitWithErrorMsgOnNoPackageJson(t) {
 	});
 });
 
+test.cb(function shouldExitWithCodeZeroOnPressedESC(t) {
+	var run = spawn('node', ['../cli.js', './fixtures'], {
+		cwd: cwd
+	});
+	run.on('close', function (code) {
+		t.is(code, 0);
+		t.end();
+	});
+	run.stdin.write('\u001b');
+	run.stdin.end();
+});