updated .travis.yml [ci skip]

.travis.yml

@@ -21,13 +21,15 @@ script:
 - /usr/bin/python asciidoctor-htmlbook/gitberg-machine/machine.py -o . -m metadata.yaml book.html
 - xsltproc -stringparam external.assets.list " " ./HTMLBook/htmlbook-xsl/epub.xsl book.html
 - cp ./HTMLBook/stylesheets/epub/epub.css OEBPS
-- cp cover.jpg OEBPS/cover.jpg
+- if [ -e cover.jpg ]; then cp cover.jpg OEBPS/cover.jpg; fi
 # look for first images directory and one found, copy over to ./OEBPS
 - find . -name images -type d | head -n 1 | xargs -I {} mv {} ./OEBPS/
 - zip -rX book.epub mimetype
 - zip -rX book.epub OEBPS/ META-INF/
 - if test -d "OEBPS/images/"; then zip -rX book.epub OEBPS/images/ ;fi
 - mv book.epub Heart-of-Darkness.epub
+- ebook-convert Heart-of-Darkness.epub Heart-of-Darkness.mobi
+- xvfb-run ebook-convert Heart-of-Darkness.epub Heart-of-Darkness.pdf
 branches:
   only:
   - master
@@ -43,10 +45,15 @@ deploy:
   provider: releases
   api_key:
     secure: 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
-  file: Heart-of-Darkness.epub
+  file:
+    - Heart-of-Darkness.epub
+    - Heart-of-Darkness.mobi
+    - Heart-of-Darkness.pdf
   "on":
     repo: GITenberg/Heart-of-Darkness_219
 addons:
   apt:
     packages:
-    - xsltproc
+    - xsltproc
+    - xvfb
+    - calibre