+ @if [ -e $(ALTCOVERIMAGE) ] && [ ! -e $(COVERIMAGE) ] ; then \
+ ebook-convert $(EPUB) regen_$(EPUB) --cover $(ALTCOVERIMAGE) ; \
+ fi
+ @if [ -e $(COVERIMAGE) ] ; then \
+ ebook-convert $(EPUB) regen_$(EPUB) --cover $(COVERIMAGE) ; \
+ fi
+ @if [ ! -e $(ALTCOVERIMAGE) ] && [ ! -e $(COVERIMAGE) ] ; then \
+ ebook-convert $(EPUB) regen_$(EPUB) ; \
+ fi
+