From 9253b764fad8452fb1cf0760be482b692fdfb728 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Samy=20Pess=C3=A9?= <samypesse@gmail.com>
Date: Thu, 25 Feb 2016 15:12:04 +0100
Subject: [PATCH] Don't pass cover to ebook-convert if non existant

---
 .gitignore           | 6 +++---
 lib/output/ebook.js  | 5 +++--
 lib/utils/command.js | 2 +-
 3 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/.gitignore b/.gitignore
index 259b0a6e4..27dec83d9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -30,6 +30,6 @@ build/Release
 # Output of documentation
 docs/_book
 
-lib2
-test2
-theme2
\ No newline at end of file
+book.pdf
+book.epub
+book.mobi
diff --git a/lib/output/ebook.js b/lib/output/ebook.js
index a74af415d..228a0256a 100644
--- a/lib/output/ebook.js
+++ b/lib/output/ebook.js
@@ -113,8 +113,9 @@ EbookOutput.prototype.locateCover = function() {
     cover = this.resolve(cover);
 
     // Cover doesn't exist and multilingual?
-    if (!fs.existsSync(cover) && this.parent) {
-        return this.parent.locateCover();
+    if (!fs.existsSync(cover)) {
+        if (this.parent) return this.parent.locateCover()
+        else return undefined;
     }
 
     return cover;
diff --git a/lib/utils/command.js b/lib/utils/command.js
index c1689cbda..d2beba0ba 100644
--- a/lib/utils/command.js
+++ b/lib/utils/command.js
@@ -15,7 +15,7 @@ function exec(command, options) {
 
     var child = childProcess.exec(command, options, function(err, stdout, stderr) {
         if (!err) {
-            d.resolve();
+            return d.resolve();
         }
 
         err.message = stdout.toString('utf8') + stderr.toString('utf8');