From ee13b4bf75b05bf4814deffdfc9609ce7fa8922a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Samy=20Pess=C3=A9?= <samypesse@gmail.com>
Date: Wed, 28 Jan 2015 12:22:26 +0100
Subject: [PATCH] Improve error message when imagemagick is not installed

---
 lib/utils/images.js | 9 ++++++++-
 lib/utils/page.js   | 3 ++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/lib/utils/images.js b/lib/utils/images.js
index 5a3992734..5c2db694d 100644
--- a/lib/utils/images.js
+++ b/lib/utils/images.js
@@ -18,7 +18,14 @@ var convert = function(source, dest, options) {
 	if (options.resize)  img = img.resize(options.resize.w, options.resize.h);
 
 	img.noProfile()
-	.write(dest, d.makeNodeResolver());
+	.write(dest, function(err) {
+		if (!err) return d.resolve();
+
+		if (err.code == "ENOENT") {
+			err = new Error("Need to install 'ImageMagick'");
+		}
+		d.reject(err);
+	});
 
 	return d.promise;
 };
diff --git a/lib/utils/page.js b/lib/utils/page.js
index e526afb39..fa333f28a 100644
--- a/lib/utils/page.js
+++ b/lib/utils/page.js
@@ -155,8 +155,9 @@ function convertImages(images, options) {
             return imgUtils.convert(imgin, imgout)
             .then(function() {
                 options.book.log.debug.ok();
-            }, function() {
+            }, function(err) {
                 options.book.log.debug.fail();
+                throw err;
             });
         });
     }, Q());