Change Makefile: add .build dir, usage preprocessor.py

.gitignore

@@ -1,2 +1,3 @@
+.build/
 *.xpi
 *.pyc

Makefile

@@ -1,9 +1,49 @@
-all: xpi
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-xpi:
-	cd "extension"; \
-	zip -FS -r "../firefox-extension-htitle.xpi" *; \
+XPI = "firefox-extension-htitle.xpi"
+
+DIRS = $(shell find extension/ -type d)
+DIRS := $(filter-out extension/chrome/skin/shared, $(DIRS))
+
+INCLUDES = $(shell find extension/ -type f -name '*.css.inc')
+
+FILES = $(shell find extension/ -type f ! -name '*.css.inc')
+
+TARGET_DIRS = $(patsubst extension/%, .build/%, $(DIRS))
+TARGET_FILES = $(patsubst extension/%, .build/%, $(FILES))
+
+all: prepare $(TARGET_DIRS) $(TARGET_FILES) $(XPI)
+
+prepare:
+	@mkdir -p ".build/"
+
+$(TARGET_DIRS):
+	@echo Create directory "$@"
+	@mkdir -p "$@"
+
+.build/%.css: extension/%.css $(INCLUDES)
+	@echo Convert "$<" to "$@"
+	@python2 preprocessor.py --marker="%" \
+		--output="$@" "$<"
+
+.build/%: extension/%
+	@echo Copy "$<" to "$@"
+	@cp "$<" "$@"
+
+$(XPI):
+	@echo Create $(XPI)
+	@cd ".build/"; \
+	zip -FS -r "../$(XPI)" *; \
 	cd ..
 
+.PHONY : clean
+
 clean:
-	rm -f "firefox-extension-htitle.xpi"
+	@echo Remove $(XPI)
+	@rm -f $(XPI)
+	@echo Remove .build/
+	@rm -rf ".build"
+	@echo Remove *.pyc
+	@rm -f *.pyc