-.asc.html:
- a2x --doctype manpage --format xhtml -D . $<
- rm -f docbook-xsl.css
-
-advent-$(VERS).tar.gz: $(SOURCES) advent.6
- tar --transform='s:^:advent-$(VERS)/:' --show-transformed-names -cvzf advent-$(VERS).tar.gz $(SOURCES) advent.6
+.adoc.html:
+ asciidoc $<
+.adoc:
+ asciidoc $<
+
+# README.adoc exists because that filename is magic on GitLab.
+DOCS=COPYING NEWS README.adoc TODO \
+ advent.adoc history.adoc index.adoc hints.adoc advent.6
+
+# Can't use GNU tar's --transform, needs to build under Alpine Linux
+advent-$(VERS).tar.gz: $(SOURCES) $(DOCS)
+ @ls $(SOURCES) $(DOCS) | sed s:^:advent-$(VERS)/: >MANIFEST
+ @(ln -s . advent-$(VERS))
+ (tar -T MANIFEST -czvf advent-$(VERS).tar.gz)
+ @(rm advent-$(VERS))