Compile and compress multiple Coffee-Script files into a single one, including a working source map

Makefile

# adjust these path to where ever the executables are
COFFEE_BIN		= ./node_modules/.bin/coffee
UGLIFY_BIN		= ./node_modules/.bin/uglifyjs
# https://github.com/edc/mapcat
MAPCAT_BIN		= ./node_modules/.bin/mapcat

# Where your coffee files are
INPUT_FOLDER	= ./input
# Where you want your output
OUTPUT_FOLDER	= ./output
# Filename for the uncompressed JavaScript
FILE_NAME		= alljavascript.js

OUTPUT_FILE		= $(OUTPUT_FOLDER)/$(FILE_NAME)

COFFEE_FILES	= $(shell ls $(INPUT_FOLDER)/*.coffee)


all: coffee

# I love typing "make coffee" into my terminal
coffee:
	$(COFFEE_BIN) --bare --compile --map $(COFFEE_FILES)
	$(MAPCAT_BIN) $(COFFEE_FILES:.coffee=.map) --jsout $(OUTPUT_FILE) --mapout $(OUTPUT_FILE:.js=.map)
	-@rm $(COFFEE_FILES:.coffee=.map) $(COFFEE_FILES:.coffee=.js)
	$(UGLIFY_BIN) --compress --mangle \
		--in-source-map $(OUTPUT_FILE:.js=.map) \
		--source-map $(OUTPUT_FILE:.js=.min.map) \
		--output $(OUTPUT_FILE:.js=.min.js) \
		--source-map-url $(OUTPUT_FILE:$(OUTPUT_FOLDER)/%.js=%.min.map) \
		--source-map-root file://$(shell pwd)/$(OUTPUT_FOLDER)

clean:
	-rm $(OUTPUT_FOLDER)/*.js
	-rm $(OUTPUT_FOLDER)/*.map