Haxe makefile with file watching. Requires fswatch (`brew install fswatch`)

Haxe Makefile

HXML ?= $(shell find . -name "*.hxml" -print -quit)
SOURCES ?= $(shell find . -name "*.hx")

# Determine output file or directory from target arguments in HXML
OUTPUT ?= $(shell echo ' \
class M { static function main() { \
	var r = ~/^\s*-?-(js|lua|swf|as3|neko|php|cpp|cppia|cs|java|python|hl)\s+([^\\n]+)/im; \
	if (r.match(sys.io.File.getContent(Sys.args()[0]))) \
		Sys.print(r.matched(2)); \
} } \
' > /tmp/M.hx && haxe -p /tmp/ --run M $(HXML); rm /tmp/M.hx )

HAXE_FLAGS ?= 

SERVER_FLAG =
ifdef SERVER
SERVER_FLAG = --connect $(SERVER)
endif

mkfile_path := $(abspath $(lastword $(MAKEFILE_LIST)))

.PHONY: all
all: $(OUTPUT)

$(OUTPUT): $(SOURCES) $(HXML)
	@printf "$(CARET) Compiling ${BOLD}$(HXML)$(RESET)\t"

	@# set output color to red to color errors
	@printf "$(RED)"
	@haxe $(SERVER_FLAG) $(HAXE_FLAGS) $(HXML) && \
		printf "$(RESET)" && \
		printf "$(BOLD)$(GREEN)OK\n" || \
		printf "$(RESET)"

	@printf "$(RESET)"
	@printf "\n"

.PHONY: libs
libs:
	haxelib install $(HXML) --always

.PHONY: clean
clean:
	@printf "$(CARET) $(BOLD)Are you sure you want to delete $(OUTPUT)?$(RESET)\n[y/N] " && read ans && [ $${ans:-N} == y ]
	rm -rf $(OUTPUT)

PORT ?= 6009
.PHONY: watch
watch:
	@printf "$(BOLD)Starting compilation server on port $(PORT)$(RESET)\n"
	@haxe --wait $(PORT) &

	@make --file=$(mkfile_path) all SERVER=$(PORT) HAXE_FLAGS="$(HAXE_FLAGS)" || true
	@while true; do \
		alias shell=""; \
		fswatch $(value SOURCES) $(value HXML) --one-event | xargs -n1 -I%  make --file=$(mkfile_path) all SERVER=$(PORT) HAXE_FLAGS="$(HAXE_FLAGS)"; \
		test $$? -gt 128 && break; \
	done

# Pretty-logging variables

ifdef NO_COLOR
BOLD:=
GREEN:=
RED:=
GRAY:=
RESET:=
else
BOLD:=\x1B[1m
GREEN:=\x1B[38;5;10m
RED:=\x1B[38;5;1m
GRAY:=\x1B[38;5;8m
RESET:=\x1B[m
endif

CARET:=${BOLD}${GRAY}>${RESET}