From b8cd2bc94d58e9ca1c6f9a41979b857cfa4b698f Mon Sep 17 00:00:00 2001
From: jaseg <jaseg@jaseg.net>
Date: Fri, 20 Dec 2013 14:02:10 +0100
Subject: [PATCH] Return meaningful error for meaningless Dockerfiles

---
 buildfile.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/buildfile.go b/buildfile.go
index 7d87a17d3..c819e9ae2 100644
--- a/buildfile.go
+++ b/buildfile.go
@@ -568,7 +568,7 @@ func (b *buildFile) Build(context io.Reader) (string, error) {
 		}
 		return b.image, nil
 	}
-	return "", fmt.Errorf("An error occurred during the build\n")
+	return "", fmt.Errorf("No image was generated. This may be because the Dockerfile does not, like, do anything.\n")
 }
 
 func NewBuildFile(srv *Server, outStream, errStream io.Writer, verbose, utilizeCache, rm bool, outOld io.Writer, sf *utils.StreamFormatter, auth *auth.AuthConfig) BuildFile {