# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
# file LICENSE.rst or https://cmake.org/licensing for details.

#[=======================================================================[.rst:
FindKDE4
--------



Find KDE4 and provide all necessary variables and macros to compile
software for it.  It looks for KDE 4 in the following directories in
the given order:

::

  CMAKE_INSTALL_PREFIX
  KDEDIRS
  /opt/kde4



Please look in ``FindKDE4Internal.cmake`` and ``KDE4Macros.cmake`` for more
information.  They are installed with the KDE 4 libraries in
$KDEDIRS/share/apps/cmake/modules/.

Author: Alexander Neundorf <neundorf@kde.org>
#]=======================================================================]

# If Qt3 has already been found, fail.
if(QT_QT_LIBRARY)
  if(KDE4_FIND_REQUIRED)
    message( FATAL_ERROR "KDE4/Qt4 and Qt3 cannot be used together in one project.")
  else()
    if(NOT KDE4_FIND_QUIETLY)
      message( STATUS    "KDE4/Qt4 and Qt3 cannot be used together in one project.")
    endif()
    return()
  endif()
endif()

file(TO_CMAKE_PATH "$ENV{KDEDIRS}" _KDEDIRS)

# when cross compiling, searching kde4-config in order to run it later on
# doesn't make a lot of sense. We'll have to do something about this.
# Searching always in the target environment ? Then we get at least the correct one,
# still it can't be used to run it. Alex

# For KDE4 kde-config has been renamed to kde4-config
find_program(KDE4_KDECONFIG_EXECUTABLE NAMES kde4-config
   # the suffix must be used since KDEDIRS can be a list of directories which don't have bin/ appended
   PATH_SUFFIXES bin
   HINTS
   ${CMAKE_INSTALL_PREFIX}
   ${_KDEDIRS}
   /opt/kde4
   ONLY_CMAKE_FIND_ROOT_PATH
   )

if (NOT KDE4_KDECONFIG_EXECUTABLE)
  if (KDE4_FIND_REQUIRED)
    message(FATAL_ERROR "ERROR: Could not find KDE4 kde4-config")
  endif ()
endif ()


# when cross compiling, KDE4_DATA_DIR may be already preset
if(NOT KDE4_DATA_DIR)
  if(CMAKE_CROSSCOMPILING)
    # when cross compiling, don't run kde4-config but use its location as install dir
    get_filename_component(KDE4_DATA_DIR "${KDE4_KDECONFIG_EXECUTABLE}" PATH)
    get_filename_component(KDE4_DATA_DIR "${KDE4_DATA_DIR}" PATH)
  else()
    # then ask kde4-config for the kde data dirs

    if(KDE4_KDECONFIG_EXECUTABLE)
      execute_process(COMMAND "${KDE4_KDECONFIG_EXECUTABLE}" --path data OUTPUT_VARIABLE _data_DIR ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
      file(TO_CMAKE_PATH "${_data_DIR}" _data_DIR)
      # then check the data dirs for FindKDE4Internal.cmake
      find_path(KDE4_DATA_DIR cmake/modules/FindKDE4Internal.cmake HINTS ${_data_DIR})
    endif()
  endif()
endif()

# if it has been found...
if (KDE4_DATA_DIR)

  set(CMAKE_MODULE_PATH  ${CMAKE_MODULE_PATH} ${KDE4_DATA_DIR}/cmake/modules)

  if (KDE4_FIND_QUIETLY)
    set(_quiet QUIET)
  endif ()

  if (KDE4_FIND_REQUIRED)
    set(_req REQUIRED)
  endif ()

  # use FindKDE4Internal.cmake to do the rest
  find_package(KDE4Internal ${_req} ${_quiet} NO_POLICY_SCOPE)
else ()
  if (KDE4_FIND_REQUIRED)
    message(FATAL_ERROR "ERROR: cmake/modules/FindKDE4Internal.cmake not found in ${_data_DIR}")
  endif ()
endif ()
