add epub validation to ebooks (#112)

Author: gibbok

tools/make-books.sh

@@ -3,14 +3,27 @@ echo "Making ebooks ..."
 DIR_DOWNLOADS=downloads
 
 cd ../
+
+# Check dependencies
 if command -v pandoc &>/dev/null; then
     echo "pandoc is installed"
 else
     echo "You need to install pandoc. Please visit: https://pandoc.org/installing.html"
     exit 1
 fi
+if command -v epubcheck &>/dev/null; then
+    echo "epubcheck is installed"
+else
+    echo "You need to install epubcheck. Please visit: https://www.w3.org/publishing/epubcheck/docs/installation/"
+    exit 1
+fi
 
+# Generate eBooks
 pandoc -o $DIR_DOWNLOADS/typescript-book.epub --metadata title="The Concise TypeScript Book" --metadata author="Simone Poggiali"  -s README.md
 pandoc -o $DIR_DOWNLOADS/typescript-book-zh_CN.epub --metadata title="# 简洁的TypeScript之书" --metadata author="Simone Poggiali"  -s README-zh_CN.md
 
+# Validate eBooks
+epubcheck $DIR_DOWNLOADS/typescript-book.epub
+epubcheck $DIR_DOWNLOADS/typescript-book-zh_CN.epub
+
 echo "Books were created. Please commit!"