# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.

# set up Doxygen for API doc generation
if(BUILD_DOCS)
  find_package(Doxygen)

  if(DOXYGEN_FOUND)
      # Note the option ALL which allows to build the docs together with the application
      set(DOXYGEN_CFG ${CMAKE_CURRENT_SOURCE_DIR}/../Doxyfile)
      add_custom_target( docs ALL
          COMMAND ${DOXYGEN_EXECUTABLE} ${DOXYGEN_CFG}
          WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/../
          COMMENT "Generating API documentation with Doxygen"
          VERBATIM )
  else()
    message(FATAL_ERROR, "Doxygen need to be installed to generate the doxygen documentation")
  endif()
endif()
