From 44b60c72e3a05b00898911cb6d0cb687e694f17a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Aur=C3=A9lien=20Pupier?= <apupier@redhat.com>
Date: Thu, 31 Aug 2017 17:28:39 +0200
Subject: [PATCH] Improve exception message for invalid source

See gh-10130
---
 .../org/springframework/boot/loader/tools/Repackager.java  | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/Repackager.java b/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/Repackager.java
index eab4b509214..e4c5fd12bc7 100644
--- a/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/Repackager.java
+++ b/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/Repackager.java
@@ -78,8 +78,11 @@ public class Repackager {
 	}
 
 	public Repackager(File source, LayoutFactory layoutFactory) {
-		if (source == null || !source.exists() || !source.isFile()) {
-			throw new IllegalArgumentException("Source must refer to an existing file");
+		if (source == null) {
+			throw new IllegalArgumentException("Source must refer to an existing file. No source file has been provided.");
+		}
+		if (!source.exists() || !source.isFile()) {
+			throw new IllegalArgumentException("Source must refer to an existing file. Provided value is " + source.getAbsolutePath());
 		}
 		this.source = source.getAbsoluteFile();
 		this.layoutFactory = layoutFactory;