Bump version to 2.0.0-alpha.4

lib/book.js

@@ -646,6 +646,11 @@ Book.prototype.parentRoot = function() {
 	return this.root;
 };
 
+// Return true if it's a sub-book
+Book.prototype.isSubBook = function() {
+	return !!this.parent;
+};
+
 // Resolve a path in book
 Book.prototype.resolve = function(p) {
     return path.resolve(this.root, p);

lib/configuration.js

@@ -107,6 +107,8 @@ Configuration.prototype.load = function() {
         if (that.options.gitbook == "*") {
             that.book.log.warn.ln("you should specify a gitbook version to use in your book.json, for example: "+(_.first(pkg.version.split("."))+".x.x"));
         }
+
+        that.options.gitbook = pkg.version;
     });
 };
 

lib/generator.js

@@ -58,7 +58,7 @@ BaseGenerator.prototype.copyCover = function() {
     ])
     .fail(function() {
         // If orignaly from multi-lang, try copy from parent
-        if (!that.isMultilingual()) return;
+        if (!that.book.isSubBook()) return;
 
         return Q.all([
             fs.copy(path.join(that.book.parentRoot(), "cover.jpg"), path.join(that.options.output, "cover.jpg")),

package.json

@@ -1,6 +1,6 @@
 {
     "name": "gitbook",
-    "version": "2.0.0-alpha.3",
+    "version": "2.0.0-alpha.4",
     "homepage": "https://www.gitbook.com",
     "description": "Library and cmd utility to generate GitBooks",
     "main": "lib/index.js",