pico_sdk_import.cmake

# This is a copy of <PICO_SDK_PATH>/external/pico_sdk_import.cmake

# This can be dropped into an external project to help locate this SDK
# It should be include()ed prior to project()

if(DEFINED ENV{PICO_SDK_PATH} AND(NOT PICO_SDK_PATH))
	set(PICO_SDK_PATH $ENV{PICO_SDK_PATH})
	message("Using PICO_SDK_PATH from environment ('${PICO_SDK_PATH}')")
endif()

if(DEFINED ENV{PICO_SDK_FETCH_FROM_GIT} AND(NOT PICO_SDK_FETCH_FROM_GIT))
	set(PICO_SDK_FETCH_FROM_GIT $ENV{PICO_SDK_FETCH_FROM_GIT})
	message("Using PICO_SDK_FETCH_FROM_GIT from environment ('${PICO_SDK_FETCH_FROM_GIT}')")
endif()

if(DEFINED ENV{PICO_SDK_FETCH_FROM_GIT_PATH} AND(NOT PICO_SDK_FETCH_FROM_GIT_PATH))
	set(PICO_SDK_FETCH_FROM_GIT_PATH $ENV{PICO_SDK_FETCH_FROM_GIT_PATH})
	message("Using PICO_SDK_FETCH_FROM_GIT_PATH from environment ('${PICO_SDK_FETCH_FROM_GIT_PATH}')")
endif()

set(PICO_SDK_PATH "${PICO_SDK_PATH}" CACHE PATH "Path to the Raspberry Pi Pico SDK")
set(PICO_SDK_FETCH_FROM_GIT "${PICO_SDK_FETCH_FROM_GIT}" CACHE BOOL "Set to ON to fetch copy of SDK from git if not otherwise locatable")
set(PICO_SDK_FETCH_FROM_GIT_PATH "${PICO_SDK_FETCH_FROM_GIT_PATH}" CACHE FILEPATH "location to download SDK")

if(NOT PICO_SDK_PATH)
	if(PICO_SDK_FETCH_FROM_GIT)
		include(FetchContent)
		set(FETCHCONTENT_BASE_DIR_SAVE ${FETCHCONTENT_BASE_DIR})

		if(PICO_SDK_FETCH_FROM_GIT_PATH)
			get_filename_component(FETCHCONTENT_BASE_DIR "${PICO_SDK_FETCH_FROM_GIT_PATH}" REALPATH BASE_DIR "${CMAKE_SOURCE_DIR}")
		endif()

		FetchContent_Declare(
			pico_sdk
			GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk
			GIT_TAG master
		)

		if(NOT pico_sdk)
			message("Downloading Raspberry Pi Pico SDK")
			FetchContent_Populate(pico_sdk)
			set(PICO_SDK_PATH ${pico_sdk_SOURCE_DIR})
		endif()

		set(FETCHCONTENT_BASE_DIR ${FETCHCONTENT_BASE_DIR_SAVE})
	else()
		message(FATAL_ERROR
			"SDK location was not specified. Please set PICO_SDK_PATH or set PICO_SDK_FETCH_FROM_GIT to on to fetch from git."
		)
	endif()
endif()

get_filename_component(PICO_SDK_PATH "${PICO_SDK_PATH}" REALPATH BASE_DIR "${CMAKE_BINARY_DIR}")

if(NOT EXISTS ${PICO_SDK_PATH})
	message(FATAL_ERROR "Directory '${PICO_SDK_PATH}' not found")
endif()

set(PICO_SDK_INIT_CMAKE_FILE ${PICO_SDK_PATH}/pico_sdk_init.cmake)

if(NOT EXISTS ${PICO_SDK_INIT_CMAKE_FILE})
	message(FATAL_ERROR "Directory '${PICO_SDK_PATH}' does not appear to contain the Raspberry Pi Pico SDK")
endif()

set(PICO_SDK_PATH ${PICO_SDK_PATH} CACHE PATH "Path to the Raspberry Pi Pico SDK" FORCE)

include(${PICO_SDK_INIT_CMAKE_FILE})