From d094a227b33e6bbf67a305f070c531262a121897 Mon Sep 17 00:00:00 2001
From: kthoden <kthoden@mpiwg-berlin.mpg.de>
Date: Fri, 23 Apr 2021 09:59:10 +0200
Subject: [PATCH] Fix DOI assignment code

---
 src/imxml2epub.py | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/imxml2epub.py b/src/imxml2epub.py
index 1fbf556..97da7e9 100755
--- a/src/imxml2epub.py
+++ b/src/imxml2epub.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8; mode: python -*-
-# Time-stamp: <2021-03-08 11:04:15 (kthoden)>
+# Time-stamp: <2021-04-23 09:58:44 (kthoden)>
 
 """ Convert a customized DocBook XML file into a set of files that
 constitute the contents of an EPUB file.
@@ -554,8 +554,10 @@ def add_css_snippet(css_snippet, css_file):
     publication_isbn = cfgPublication.get("Technical", "ISBN-epub")
 except:
     publication_isbn = cfgPublication.get("Technical", "ISBN")
-
-publication_doi = cfgPublication.get("Technical", "DOI") or None
+try:
+    publication_doi = cfgPublication.get("Technical", "DOI")
+except:
+    publication_doi = "missing"
 
 # Prepare Author String
 strAuthorString = cfgPublication.get("Authors", "Author1")