#!/usr/bin/make -f

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

COPYRIGHT = 2018-2020, Andrea Giammarchi

# GNU LibreJS 5.0 compatible license string
# * See <https://www.gnu.org/software/librejs/free-your-javascript.html>
LICENSE = magnet:?xt=urn:btih:b8999bbaf509c08d127678643c515b9ab0836bae&dn=ISC.txt ISC

%:
	dh $@

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

%.html: %.md
	cmark-gfm $< > $@

%.txt: %.md
	cmark-gfm --to plaintext $< > $@

# optimize JavaScript for browser use
# * include source-map
debian/js/es.min.js debian/js/esm.min.js: debian/js/%.min.js: %.js
debian/js/flatted.min.js: index.js
debian/js/%.min.js:
	$(if $<,,$(error source missing for browser library of $*))
	mkdir --parents $(dir $@)
	$(strip terser --compress --mangle \
		--source-map "base='$(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 $@~

cjs/index.js: esm/index.js
	mkdir --parents $(dir $@)
	ascjs esm cjs

es.js: esm/index.js
	rollup --config rollup/es.config.js
	sed -i -e 's/^var /self./' es.js

esm.js: esm/index.js
	rollup --config rollup/esm.config.js

index.js: esm/index.js
	rollup --config rollup/babel.config.js
	sed -i -e 's/^var /self./' index.js

debian/js/es.js debian/js/esm.js: debian/js/%.js: %.js
debian/js/flatted.js: index.js
debian/js/%.js:
	$(if $<,,$(error source missing for browser library of $*))
	mkdir --parents $(dir $@)
	echo '// @license $(LICENSE)' >> $@
	cat $< >> $@
	echo '// @license-end' >> $@

override_dh_clean:
	dh_clean -- $(DOCS)

override_dh_auto_configure:
	mkdir -p node_modules/@rollup
	ln -s /usr/share/nodejs/@rollup/plugin-babel node_modules/@rollup/
	ln -s /usr/share/nodejs/rollup-plugin-terser node_modules/

override_dh_auto_build: $(DOCS) \
 cjs/index.js esm/index.js \
 $(patsubst %,debian/js/%.js,es esm flatted) \
 $(patsubst %,debian/js/%.min.js.gz,es esm flatted)

override_dh_auto_test:
	node test/index.js

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

.SECONDARY: