X-Git-Url: https://git.mdrn.pl/librarian.git/blobdiff_plain/5135e076096ce04b1dbbb2f6210512d1a44fa237..1428a9d8f91b754fe7f9fb96cbdd0d6a2536ffc1:/librarian/formats/cover/evens/__init__.py

diff --git a/librarian/formats/cover/evens/__init__.py b/librarian/formats/cover/evens/__init__.py
index e470001..a4b721c 100644
--- a/librarian/formats/cover/evens/__init__.py
+++ b/librarian/formats/cover/evens/__init__.py
@@ -20,6 +20,8 @@ class EvensCover(Cover):
 
     def set_images(self, ctx):
         cover_url = self.doc.meta.get(DCNS('relation.coverimage.url'))[0]
+        if not cover_url:
+            raise BuildError('No cover specified')
         if cover_url.startswith('file://'):
             cover_url = ctx.files_path + urllib.quote(cover_url[7:])
         try: