BACKGROUND_ELM_FILES=$(shell find src/Background/ -name '*.elm')
FOREGROUND_ELM_FILES=$(shell find src/Foreground/ -name '*.elm')
BACKGROUND_JS_FILES=$(patsubst src/%.elm,build/%.js,$(BACKGROUND_ELM_FILES))
FOREGROUND_JS_FILES=$(patsubst src/%.elm,build/%.js,$(FOREGROUND_ELM_FILES))

DEPENDS_BACKGROUND := background.js
DEPENDS_FOREGROUND := app.js
DEPENDS := build/background.js build/foreground.js
COPY := manifest.json app.html

package: all
	cd build && zip -FS extension.xpi *

all: clean prepare $(COPY) $(DEPENDS)
	cp $(COPY) build

build/foreground.js: $(FOREGROUND_JS_FILES) $(DEPENDS_FOREGROUND)
	cat $^ > $@

build/background.js: $(BACKGROUND_JS_FILES) $(DEPENDS_BACKGROUND)
	cat $^ > $@

build/%.js: src/%.elm
	elm make --optimize $^ --output=$@

clean:
	[ -e build ] && rm -r build || /bin/true

prepare:
	[ ! -e build ] && mkdir build || /bin/true

.PHONY: package all clean prepare