Tidying

manual/make_epub

@@ -1,4 +1,11 @@
 #!/bin/bash
+
+EPUB_TITLE='Epicyon User Manual'
+EPUB_AUTHORS='Bob Mottram'
+EPUB_LANGUAGE='English'
+EPUB_TAGS='fediverse, activitypub, server, linux, python, smallweb'
+EPUB_COMMENTS='ActivityPub server, designed for simplicity and accessibility. Includes calendar, news and sharing economy features to empower your federated community.'
+
 if [ ! -f /usr/bin/pandoc ]; then
     echo 'pandoc command not found'
     exit 1
@@ -6,12 +13,12 @@ fi
 pandoc -f html -t markdown -o manual.md manual.html
 git add manual.md
 if [ -f /usr/bin/ebook-convert ]; then
-    ebook-convert manual.html manual.epub --cover manual-cover.png --authors "Bob Mottram" --language "English" --tags "fediverse, activitypub, server, linux, python, smallweb" --comments "ActivityPub server, designed for simplicity and accessibility. Includes calendar, news and sharing economy features to empower your federated community." --title "Epicyon User Manual"
+    ebook-convert manual.html manual.epub --cover manual-cover.png --authors "${EPUB_AUTHORS}" --language "${EPUB_LANGUAGE}" --tags "${EPUB_TAGS}" --comments "${EPUB_COMMENTS}" --title "${EPUB_TITLE}"
 else
     echo 'ebook-convert command not found'
     if [ -f /usr/bin/flatpak ]; then
         if ! flatpak --command="sh" run com.calibre_ebook.calibre \
-             -c "ebook-convert manual.html manual.epub --cover manual-cover.png --authors \"Bob Mottram\" --language \"English\" --tags \"fediverse, activitypub, server, linux, python, smallweb\" --comments \"ActivityPub server, designed for simplicity and accessibility. Includes calendar, news and sharing economy features to empower your federated community.\" --title \"Epicyon User Manual\""; then
+             -c "ebook-convert manual.html manual.epub --cover manual-cover.png --authors \"${EPUB_AUTHORS}\" --language \"${EPUB_LANGUAGE}\" --tags \"${EPUB_TAGS}\" --comments \"${EPUB_COMMENTS}\" --title \"${EPUB_TITLE}\""; then
             exit 2
         fi
     fi