#!/usr/bin/make -f

# generate documentation unless nodoc requested
ifeq (,$(filter nodoc,$(DEB_BUILD_OPTIONS)))
DOCS = README.html README.txt
endif

# resolve copyright from upstream hint, or fail
COPYRIGHT = $(shell grep -Po '^Copyright( \(c\))? \K.*' LICENSE)
$(if $(COPYRIGHT),,$(error ERROR: Failed to resolve copyright hint))

# GNU LibreJS 5.0 compatible license string
# * See <https://www.gnu.org/software/librejs/free-your-javascript.html>
LICENSE = magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&dn=expat.txt Expat

override_dh_auto_build: $(DOCS) \
 debian/js/rbtree.js debian/js/rbtree.min.js.gz

override_dh_auto_test:
ifeq (,$(filter nocheck,$(DEB_BUILD_OPTIONS)))
	tape test/*.js
endif

override_dh_installdocs:
	dh_installdocs --all -- $(DOCS)

override_dh_clean:
	dh_clean -- $(DOCS)

debian/js/rbtree.min.js: rbtree.js
debian/js/rbtree.js: rbtree.js
	mkdir --parents $(dir $@)
	echo '// @copyright $(COPYRIGHT)' >> $@
	echo '// @license $(LICENSE)' >> $@
	cat $< >> $@
	echo '// @license-end' >> $@

# optimize JavaScript for browser use
# * include source-map
debian/js/%.min.js:
	$(if $<,,$(error source missing for browser library of $*))
	mkdir --parents $(dir $@)
	$(strip uglifyjs --compress --mangle \
		--source-map "base='$(abspath $(dir $@))',url='$(notdir $@).map'" \
		--output $@ \
		-- $<)
	mv -f $@ $@~
	$(if $(COPYRIGHT),echo '// @copyright $(COPYRIGHT)' >> $@)
	$(if $(LICENSE),echo '// @license $(LICENSE)' >> $@)
	cat $@~ >> $@
	$(if $(LICENSE),echo '// @license-end' >> $@)
	rm -f $@~

# pre-compress for browser use
%.gz: %
	pigz --force --keep -11 -- $<
	brotli --force --keep --best -- $<

%.html: %.md
	pandoc --from gfm-raw_html --to html --standalone --output $@ $<

%.txt: %.md
	pandoc --from gfm-raw_html --to plain --output $@ $<

%:
	dh $@

.SECONDARY: