#
# Docs
# ----

find_package(Doxygen REQUIRED)

set(DOXYGEN_INPUT_DIR ${CMAKE_SOURCE_DIR})
set(DOXYGEN_INDEX_FILE ${CMAKE_CURRENT_SOURCE_DIR}/html/index.html)

set(DOXYGEN_OUTPUT_DIR ${CMAKE_BINARY_DIR}/docs/doxygen)
set(DOXYGEN_INDEX_FILE ${DOXYGEN_OUTPUT_DIR}/html/index.html)
set(DOXYFILE_IN ${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in)
set(DOXYFILE_OUT ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile)

#Replace variables inside @@ with the current values
configure_file(${DOXYFILE_IN} ${DOXYFILE_OUT} @ONLY)

file(MAKE_DIRECTORY ${DOXYGEN_OUTPUT_DIR}) #Doxygen won't create this for us

add_custom_command(OUTPUT ${DOXYGEN_INDEX_FILE}
    DEPENDS ${${CMAKE_PROJECT_NAME}_HEADERS}
    COMMAND ${DOXYGEN_EXECUTABLE} ${DOXYFILE_OUT}
    MAIN_DEPENDENCY ${DOXYFILE_OUT} ${DOXYFILE_IN}
    COMMENT "Generating docs")

add_custom_target(doc ALL DEPENDS ${DOXYGEN_INDEX_FILE})