Use cover file from main book in multilingual book (when no cover is set for language)

1 files changed, 27 insertions, 15 deletions

diff --git a/lib/output/ebook.js b/lib/output/ebook.js
index cd5e960..0cd1807 100644
--- a/lib/output/ebook.js
+++ b/lib/output/ebook.js
@@ -96,22 +96,34 @@ EbookOutput.prototype.getPDFTemplate = function(tpl) {
     });
 };
 
+// Locate the cover file to use
+// Use configuration or search a "cover.jpg" file
+// For multi-lingual book, it can use the one from the main book
+EbookOutput.prototype.locateCover = function() {
+    var cover = this.book.config.get('cover', 'cover.jpg');
+
+    // Resolve to absolute
+    cover = this.resolve(cover);
+
+    // Cover doesn't exist and multilingual?
+    if (!fs.existsSync(cover) && this.parent) {
+        return this.parent.locateCover();
+    }
+
+    return cover;
+};
+
 // Generate options for ebook-convert
 EbookOutput.prototype.ebookConvertOption = function() {
     var that = this;
-    var cover = this.book.config.get('cover');
-
-    if (!cover && fs.existsSync(this.resolve('cover.jpg'))) {
-        cover = this.resolve('cover.jpg');
-    }
 
     var options = {
-        '--cover': cover,
-        '--title': this.book.config.get('title'),
-        '--comments': this.book.config.get('description'),
-        '--isbn': this.book.config.get('isbn'),
-        '--authors': this.book.config.get('author'),
-        '--language': this.book.config.get('language'),
+        '--cover': this.locateCover(),
+        '--title': that.book.config.get('title'),
+        '--comments': that.book.config.get('description'),
+        '--isbn': that.book.config.get('isbn'),
+        '--authors': that.book.config.get('author'),
+        '--language': that.book.config.get('language'),
         '--book-producer': 'GitBook',
         '--publisher': 'GitBook',
         '--chapter': 'descendant-or-self::*[contains(concat(\' \', normalize-space(@class), \' \'), \' book-chapter \')]',
@@ -123,15 +135,15 @@ EbookOutput.prototype.ebookConvertOption = function() {
         '--breadth-first': true
     };
 
-    if (this.opts.format == 'epub') {
+    if (that.opts.format == 'epub') {
         options = _.extend(options, {
             '--dont-split-on-page-breaks': true
         });
     }
 
-    if (this.opts.format != 'pdf') return Promise(options);
+    if (that.opts.format != 'pdf') return Promise(options);
 
-    var pdfOptions = this.book.config.get('pdf');
+    var pdfOptions = that.book.config.get('pdf');
 
     options = _.extend(options, {
         '--chapter-mark': String(pdfOptions.chapterMark),
@@ -149,7 +161,7 @@ EbookOutput.prototype.ebookConvertOption = function() {
         '--pdf-sans-family': String(pdfOptions.fontFamily)
     });
 
-    return this.getPDFTemplate('header')
+    return that.getPDFTemplate('header')
     .then(function(tpl) {
         options['--pdf-header-template'] = tpl;