cmake_minimum_required (VERSION 2.8)
project (mraa)

FIND_PACKAGE (Threads REQUIRED)

set (CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -Wall -fno-omit-frame-pointer")
set (CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -Wall")
set (LIB_INSTALL_DIR "lib${LIB_SUFFIX}" CACHE PATH "Installation path for libraries")

# Set CMAKE_LIB_INSTALL_DIR if not defined
include(GNUInstallDirs)

# Appends the cmake/modules path to MAKE_MODULE_PATH variable.
set (CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules ${CMAKE_MODULE_PATH})

# Make a version file containing the current version from git.
include (GetGitRevisionDescription)
git_describe (VERSION "--tags")
if ("x_${VERSION}" STREQUAL "x_GIT-NOTFOUND")
  message (WARNING " - Install git to compile a production libmraa!")
  set (VERSION "v0.6.2-dirty")
endif ()

message (INFO " - libmraa Version ${VERSION}")

#parse the version information into pieces.
string (REGEX REPLACE "^v([0-9]+)\\..*" "\\1" VERSION_MAJOR "${VERSION}")
string (REGEX REPLACE "^v[0-9]+\\.([0-9]+).*" "\\1" VERSION_MINOR "${VERSION}")
string (REGEX REPLACE "^v[0-9]+\\.[0-9]+\\.([0-9]+).*" "\\1" VERSION_PATCH "${VERSION}")
string (REGEX REPLACE "^v[0-9]+\\.[0-9]+\\.[0-9]+\\-([0-9]+).*" "\\1" VERSION_COMMIT "${VERSION}")
string (REGEX REPLACE "^v[0-9]+\\.[0-9]+\\.[0-9]+-[0-9]+\\-(.*)" "\\1" VERSION_SHA1 "${VERSION}")
set (VERSION_SHORT "${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH}")

if ("${VERSION_COMMIT}" MATCHES "^v.*")
  set (VERSION_COMMIT "")
endif()

configure_file (${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules/version.c.in
                ${CMAKE_CURRENT_BINARY_DIR}/src/version.c)

# this is the library version, independant of git revision
set (mraa_VERSION_MAJOR ${VERSION_MAJOR})
set (mraa_VERSION_MINOR ${VERSION_MINOR})
set (mraa_VERSION_PATCH ${VERSION_PATCH})
set (mraa_VERSION_STRING ${mraa_VERSION_MAJOR}.${mraa_VERSION_MINOR}.${mraa_VERSION_PATCH})

set (CMAKE_SWIG_FLAGS "")

find_path (SYSTEM_USR_DIR "stdlib.h")
include_directories (${SYSTEM_USR_DIR})

option (BUILDDOC "Build all doc." OFF)
option (BUILDSWIG "Build swig modules." ON)
option (BUILDSWIGPYTHON "Build swig python modules." ON)
option (BUILDSWIGNODE "Build swig node modules." ON)
option (BUILDSWIGJAVA "Build Java API." OFF)
option (IPK "Generate IPK using CPack" OFF)
option (RPM "Generate RPM using CPack" OFF)
option (BUILDPYTHON3 "Use python3 for building/installing" OFF)
option (INSTALLGPIOTOOL "Install gpio tool" OFF)
option (BUILDARCH "Override architecture to build for - override" OFF)
option (TESTS "Override the addition of tests" ON)

if (NOT BUILDARCH)
  include (TargetArch)
  target_architecture (DETECTED_ARCH)
  message( INFO " - Target arch is ${DETECTED_ARCH}")
else ()
  set (DETECTED_ARCH ${BUILDARCH})
  message( INFO " - Override arch is ${DETECTED_ARCH}")
endif()

if (DETECTED_ARCH STREQUAL "i586" OR DETECTED_ARCH STREQUAL "x86_64"
    OR DETECTED_ARCH STREQUAL "i386")
  set (X86PLAT ON)
elseif (DETECTED_ARCH MATCHES "arm.*")
  set (ARMPLAT ON)
else ()
  message(FATAL_ERROR "Only x86 and arm platforms currently supported")
endif()

if (BUILDSWIGPYTHON)
  if (BUILDPYTHON3)
    set (PYTHONBUILD_VERSION 3)
  else ()
    set (PYTHONBUILD_VERSION 2.7)
  endif ()
  find_package (PythonInterp ${PYTHONBUILD_VERSION} REQUIRED)
  if (TESTS)
    if (${PYTHONINTERP_FOUND})
      enable_testing ()
      add_subdirectory (tests)
    endif ()
  endif ()
endif ()

if (BUILDDOC)
  # add a target to generate API documentation with Doxygen
  find_package (Doxygen)
  if (DOXYGEN_FOUND)
    configure_file (${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile @ONLY)
    add_custom_target (doc
      ${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile
      WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
      COMMENT "Generating API documentation with Doxygen" VERBATIM
    )
  endif (DOXYGEN_FOUND)
endif ()

if (IPK)
  # Get target package arch from Yocto ADT sysroot if set or host OS, mapping to Ubuntu name if necessary
  if (DEFINED ENV{OECORE_TARGET_SYSROOT})
    GET_FILENAME_COMPONENT (DETECTED_SYSROOT $ENV{OECORE_TARGET_SYSROOT} NAME)
    string (REGEX REPLACE "-poky-linux" "" TARGET_ARCH "${DETECTED_SYSROOT}")
  else ()
    # debian uses amd64 to denote x86_64
    if (DETECTED_ARCH STREQUAL "x86_64")
      set (TARGET_ARCH "amd64")
    else ()
      set (TARGET_ARCH ${DETECTED_ARCH})
    endif ()
  endif ()
  message (INFO " - Package arch is ${TARGET_ARCH}")

  set(CPACK_GENERATOR "DEB" "TGZ")
  set(OPKG_ARCH ${TARGET_ARCH})
  set(CPACK_BINARY_DIR ${CMAKE_BINARY_DIR})
  set(CPACK_DEBIAN_PACKAGE_MAINTAINER "Intel IoT-Devkit") #required
  set(mraa_PACKAGE_ON_TAG ".")
  if ("${VERSION_COMMIT}" STREQUAL "")
    set(mraa_PACKAGE_ON_TAG "")
  endif()
  set(CPACK_PACKAGE_VERSION 
      "${mraa_VERSION_MAJOR}.${mraa_VERSION_MINOR}.${mraa_VERSION_PATCH}${mraa_PACKAGE_ON_TAG}${VERSION_COMMIT}")
  set(CPACK_PACKAGE_NAME "libmraa${mraa_VERSION_MAJOR}")
  set(CPACK_DEBIAN_PACKAGE_SECTION "libs")
  set(CPACK_DEBIAN_PACKAGE_ARCHITECTURE ${TARGET_ARCH})
  set(CPACK_SYSTEM_NAME ${TARGET_ARCH})
  set(CPACK_DEBIAN_PACKAGE_PROVIDES "libmraa-dev, libmraa-dbg, libmraa-doc")
  set(CPACK_DEBIAN_PACKAGE_REPLACES ${CPACK_DEBIAN_PACKAGE_PROVIDES})
  set(CPACK_DEBIAN_PACKAGE_CONFLICTS ${CPACK_DEBIAN_PACKAGE_PROVIDES})
  set(WDIR "${CPACK_TOPLEVEL_DIRECTORY}/${CPACK_PACKAGE_FILE_NAME}")
  include (CPack)
endif()

if (RPM)
  message (INFO " - Enabled RPM packaging for ${DETECTED_ARCH}")
  set(CPACK_PACKAGE_VERSION ${VERSION})
  set(CPACK_GENERATOR "RPM")
  set(CPACK_PACKAGE_NAME "libmraa${mraa_VERSION_MAJOR}")
  set(CPACK_PACKAGE_RELEASE 1)
  set(CPACK_PACKAGE_VERSION
      "${mraa_VERSION_MAJOR}.${mraa_VERSION_MINOR}.${mraa_VERSION_PATCH}${mraa_PACKAGE_ON_TAG}${VERSION_COMMIT}")
  set(CPACK_PACKAGE_CONTACT "Intel IoT-Devkit")
  set(CPACK_PACKAGE_VENDOR "Intel IoT-Devkit")
  set(CPACK_RPM_PACKAGE_PROVIDES "${CPACK_PACKAGE_NAME}-devel")
  EXECUTE_PROCESS(COMMAND rpm --showrc
    COMMAND grep -E "dist[[:space:]]*\\."
    COMMAND sed -e "s/^.*dist\\s*\\.//"
    COMMAND tr \\n \\t
    COMMAND sed  -e s/\\t//
    OUTPUT_VARIABLE DIST_TAG)
  set(CPACK_PACKAGE_FILE_NAME "${CPACK_PACKAGE_NAME}-${CPACK_PACKAGE_VERSION}-${CPACK_PACKAGE_RELEASE}.${DIST_TAG}.${DETECTED_ARCH}")
  include(CPack)
endif()

add_subdirectory (src)
add_subdirectory (examples)