From 28a92d22dcc32ba75f641e98540b1721348f0eb0 Mon Sep 17 00:00:00 2001
From: Phillip Webb <pwebb@gopivotal.com>
Date: Thu, 16 Jan 2014 09:19:26 -0800
Subject: [PATCH] Prevent CTRL-D from causing NPE in shell

Update the integrated shell to deal with a null line which can be
triggered with CTRL-D.

Fixes gh-229
---
 .../org/springframework/boot/cli/command/shell/Shell.java     | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/spring-boot-cli/src/main/java/org/springframework/boot/cli/command/shell/Shell.java b/spring-boot-cli/src/main/java/org/springframework/boot/cli/command/shell/Shell.java
index cfb6e23462..e0f67fe702 100644
--- a/spring-boot-cli/src/main/java/org/springframework/boot/cli/command/shell/Shell.java
+++ b/spring-boot-cli/src/main/java/org/springframework/boot/cli/command/shell/Shell.java
@@ -175,8 +175,8 @@ public class Shell {
 	}
 
 	private void runInputLoop() throws Exception {
-		while (true) {
-			String line = this.consoleReader.readLine(getPrompt());
+		String line;
+		while ((line = this.consoleReader.readLine(getPrompt())) != null) {
 			while (line.endsWith("\\")) {
 				line = line.substring(0, line.length() - 1);
 				line += this.consoleReader.readLine("> ");