From 1ac6c7b196101654bb9948f4e386f707d9916563 Mon Sep 17 00:00:00 2001
From: Hendrik Kleinwaechter <hendrik.kleinwaechter@gmail.com>
Date: Tue, 11 Jul 2023 09:55:28 +0200
Subject: [PATCH] Fix build issue

---
 book/makefile           | 2 +-
 website/modify_build.rb | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/book/makefile b/book/makefile
index aca79e4..95384ab 100644
--- a/book/makefile
+++ b/book/makefile
@@ -226,7 +226,7 @@ release_sans_serif: build_sans_serif_pdf build_sans_serif_ebook | make_release_d
 website:
 	rm -rf $(WEBSITE_DIR)
 	make4ht -c website.cfg -a debug -uf html5+tidy+common_domfilters+dvisvgm_hashes -d $(WEBSITE_DIR) book.tex
-	mv $(WEBSITE_DIR)/book.html $(WEBSITE_DIR)/index.html
+	cp $(WEBSITE_DIR)/book.html $(WEBSITE_DIR)/index.html
 	sed -r -i -e 's|<title></title>|<title>The Sourdough Framework</title>|g' $(WEBSITE_DIR)/index.html
 
 # Debug Stuff from now on
diff --git a/website/modify_build.rb b/website/modify_build.rb
index 6f65a93..42d7dee 100644
--- a/website/modify_build.rb
+++ b/website/modify_build.rb
@@ -59,6 +59,8 @@ class ModifyBuild
     elements.each do |n|
       chapter_number_or_nothing = n.children[0].text.strip
       hyperlink_node = n.children[1]
+      next if hyperlink_node.nil?
+
       # remove unneeded text and merge into single a tag
       n.children[0].remove
       link_text = hyperlink_node.content