TARGET_ARCH := thumbv6m-none-eabi
ELF2UF2_BIN := ~/.cargo/bin/elf2uf2-rs

PROJECT_NAME := $(shell grep -E "name ?= ?\".*\"" Cargo.toml | grep -oP "(?<=\").*(?=\")")
SRC_FILES := $(shell find src -type f)

DEFAULT_TARGET := help

.PHONY: help
help: ## Display this help messag
	@echo "Please use \`make <target>' where <target> is one of"
	@grep '^[a-zA-Z]' $(MAKEFILE_LIST) | sort | awk -F ':.*?## ' 'NF==2 {printf "\033[36m  %-25s\033[0m %s\n", $$1, $$2}'

.PHONY: build
build: target/$(TARGET_ARCH)/debug/$(PROJECT_NAME).uf2 ## Build the project

.PHONY: release
release: target/$(TARGET_ARCH)/release/$(PROJECT_NAME).uf2 ## Build the project for release

.PHONY: install-build
install-build: build
	@sudo mount "$$(lsblk -o PATH,LABEL | grep RPI-RP2 | awk '{print $$1}')" /mnt
	@sudo cp target/$(TARGET_ARCH)/debug/$(PROJECT_NAME).uf2 /mnt/

.PHONY: install-release
install-release: release
	@sudo mount "$$(lsblk -o PATH,LABEL | grep RPI-RP2 | awk '{print $$1}')" /mnt
	@sudo cp target/$(TARGET_ARCH)/release/$(PROJECT_NAME).uf2 /mnt/

Cargo.lock: Cargo.toml
	@cargo update

target/$(TARGET_ARCH)/%/$(PROJECT_NAME): $(SRC_FILES) Cargo.toml Cargo.lock
	@if [[ "$@" == *"release"* ]]; then \
		cargo build --release --target $(TARGET_ARCH); \
	else \
		cargo build --target $(TARGET_ARCH); \
	fi

target/$(TARGET_ARCH)/%/$(PROJECT_NAME).uf2: target/$(TARGET_ARCH)/%/$(PROJECT_NAME)
	@$(ELF2UF2_BIN) $^ $@