ifeq ($(VERBOSE),y)
else
HIDE = > /dev/zero
.SILENT:
endif

TIMESTAMP = $(shell date +"%T")
cmd_copy = cp -a $(1) $(2)
cmd_link = ln -sfr $(1) $(2)
cmd_remove = rm -rf $(1)
cmd_mkdir = mkdir -p $(1)
cmd_cat = cat $(1) 2>/dev/null
cmd_print_lines = echo $(1) | tr ' ' '\n'

color_green = \033[32m$(1)\033[0m
log = @printf "$(call color_green,[$(TIMESTAMP)]) %s\n" "$(1)"
show_build_type = $(call log,Building for $(call green,$(1)))

check-var = $(if $(strip $($(1))),,$(error [ERROR] Missing required variable: $(1)))
check_command = $(shell which $(1) > /dev/null 2>&1 && echo y || echo n)

$(call check-var,PROJECT)
$(call check-var,PLATFORM)
$(call check-var,BUILD_DIR)
$(call check-var,CONFIG_FILE)
$(call check-var,LINK_SRCS)

ifndef SCRIPT_DIR
    CURRENT_FILE := $(lastword $(MAKEFILE_LIST))
    CURRENT_DIR := $(patsubst %/,%,$(dir $(CURRENT_FILE)))
    SCRIPT_DIR := $(CURRENT_DIR)
endif

ifeq ($(strip $(LINK_SRCS)),y)
    update_files = $(call cmd_link,$(1),$(2))
    update_dir = $(call cmd_link,$(1),$(2))
    ACTION = Linking
else
    update_files = $(call cmd_copy,$(1),$(dir $(2)))
    update_dir = $(call cmd_copy,$(1),$(2))
    ACTION = Copying
endif

#------------------------------------------------------------------------------
#                          COMMON INITIALIZATION
#------------------------------------------------------------------------------
PLATFORM_TOOLS = $(SCRIPT_DIR)/platform/$(PLATFORM)
BUILD_LOCK = $(BUILD_DIR)/.project.lock

ifeq ('xilinx', '$(PLATFORM)')
    include $(PLATFORM_TOOLS)/xilinx.mk
endif


#------------------------------------------------------------------------------
#                             Generic Goals
#------------------------------------------------------------------------------

.DEFAULT_GOAL := all
PHONY += all
ifneq ($(wildcard $(BUILD_LOCK)),)
all:
	@$(call print_build_type,$(PLATFORM))
	$(MAKE) --no-print-directory build
	@$(call print,Done ($(notdir $(BUILD_DIR))))
else
all:
	@$(call print_build_type,$(PLATFORM))
	$(MAKE) --no-print-directory project
	$(MAKE) --no-print-directory build
	@$(call print,Done ($(notdir $(BUILD_DIR))))
endif

project: $(PLATFORM)_project
	@echo "$(TIMESTAMP): Build lock." > $(BUILD_LOCK)

standalone:
	$(MAKE) --no-print-directory project LINK_SRCS=n

# Build project using generic compiler
build: $(PLATFORM)_sdkbuild

# Open the project using the corresponding SDK
sdkopen: $(PLATFORM)_sdkopen

# Remove build artefacts
PHONY += clean
ifneq ($(wildcard $(BUILD_LOCK)),)
clean:
	@$(call log,Cleaning sdk build uploaded to board)
	$(MAKE) --no-print-directory $(PLATFORM)_sdkclean
else
clean:
	@$(call log,No project found, cleaning dummy files)
	$(MAKE) --no-print-directory reset
endif

# Remove the whole build directory
reset: $(PLATFORM)_reset
	@$(call log,[Delete] $(BUILD_DIR))
	@$(call cmd_remove,$(BUILD_DIR))

.PHONY: $(PHONY)