# Icinga 2
# Copyright (C) 2012-2017 Icinga Development Team (https://www.icinga.com/)
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.

define_property(
  SOURCE
  PROPERTY EXCLUDE_UNITY_BUILD
  BRIEF_DOCS "Whether to exclude the source file from unity builds"
  FULL_DOCS "Specified whether a source file should be excluded from unity builds and should be built separately"
)

if(ICINGA2_UNITY_BUILD)
    add_executable(mkunity mkunity.c)

    set_target_properties (
      mkunity PROPERTIES
      FOLDER Bin
    )

    function(MKUNITY_TARGET Target Prefix UnityInputRef)
        set(UnityInput ${${UnityInputRef}})
        set(UnityOutput ${CMAKE_CURRENT_BINARY_DIR}/${Target}_unity.cpp)
        set(RealSources "")
        set(UnitySources "")
        foreach(UnitySource ${UnityInput})
            get_property(SourceExcluded SOURCE ${UnitySource} PROPERTY EXCLUDE_UNITY_BUILD)
            if(SourceExcluded MATCHES TRUE OR NOT ${UnitySource} MATCHES "\\.(cpp|cxx|cc)\$")
                list(APPEND RealSources ${UnitySource})
            else()
                list(APPEND UnitySources ${UnitySource})
            endif()
        endforeach()
        add_custom_command(
            OUTPUT ${UnityOutput}
            COMMAND mkunity
            ARGS ${Prefix} ${UnitySources} > ${UnityOutput}.tmp
            COMMAND ${CMAKE_COMMAND}
            ARGS -E copy ${UnityOutput}.tmp ${UnityOutput}
            WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
            DEPENDS mkunity ${UnityInput}
        )
        list(APPEND RealSources ${UnityOutput})
        set(${UnityInputRef} ${RealSources} PARENT_SCOPE)
    endfunction()
endif()