cmake_minimum_required (VERSION 2.8)
project (mraa C)

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 "${CMAKE_INSTALL_LIBDIR}" CACHE PATH "Installation path for libraries")

# Set CMAKE_LIB_INSTALL_DIR if not defined
include(GNUInstallDirs)

# By default, build shared object libraries on linux
if (UNIX AND NOT APPLE)
  if (NOT DEFINED BUILD_SHARED_LIBS)
    set(BUILD_SHARED_LIBS ON)
  endif()
endif()

# 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_${VERSION}" STREQUAL "x_GIT-NOTFOUND" OR "x_${VERSION}" STREQUAL "x_HEAD-HASH-NOTFOUND" OR "x_${VERSION}" STREQUAL "x_-128-NOTFOUND")
  message (WARNING " - Install git to compile a production libmraa!")
  set (VERSION "v0.9.0-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 (USBPLAT "Detection USB platform." OFF)
option (FTDI4222 "Build with FTDI FT4222 subplatform support." OFF)
option (IPK "Generate IPK using CPack" OFF)
option (RPM "Generate RPM using CPack" OFF)
option (BUILDPYTHON3 "Use python3 for building/installing/testing" OFF)
option (ENABLEEXAMPLES "Disable building of examples" ON)
option (INSTALLGPIOTOOL "Install gpio tool" OFF)
option (BUILDARCH "Override architecture to build for - override" OFF)
option (BUILDTESTS "Override the addition of tests" ON)

set (MRAAPLATFORMFORCE "" CACHE STRING "ALL")

if (NOT BUILDSWIG)
  set (BUILDSWIGPYTHON OFF)
  set (BUILDSWIGNODE OFF)
  set (BUILDSWIGJAVA OFF)
endif()

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 OR BUILDTESTS)
  if (BUILDPYTHON3)
    set (PYTHONBUILD_VERSION 3)
  else ()
    set (PYTHONBUILD_VERSION 2.7)
  endif ()
  find_package (PythonInterp ${PYTHONBUILD_VERSION} REQUIRED)
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 ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile @ONLY)
    if (BUILDSWIGJAVA)
      configure_file (${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.java.in ${CMAKE_CURRENT_BINARY_DIR}/src/java/Doxyfile @ONLY)
    endif ()
    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 "mraa")
  set(CPACK_DEBIAN_PACKAGE_SECTION "libs")
  set(CPACK_DEBIAN_PACKAGE_ARCHITECTURE ${TARGET_ARCH})
  set(CPACK_SYSTEM_NAME ${TARGET_ARCH})
  set(CPACK_DEBIAN_PACKAGE_PROVIDES "mraa-dev, mraa-dbg, mraa-doc")
  set(CPACK_DEBIAN_PACKAGE_REPLACES "${CPACK_DEBIAN_PACKAGE_PROVIDES}, libmraa, libmraa-dev, libmraa-doc")
  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(CMAKE_INSTALL_PREFIX "/usr")
  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")
  # Get distro tag (e.g. 'fc20') by parsing output of rpm --showrc
  EXECUTE_PROCESS(
    COMMAND rpm --showrc
    COMMAND grep -w dist
    COMMAND sed -e "s/\\t./ /"
    COMMAND awk "{printf \"%s\", \$NF}"
    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)
if (ENABLEEXAMPLES)
  add_subdirectory (examples)
endif ()

if (BUILDTESTS)
  if (${PYTHONINTERP_FOUND})
    enable_testing ()
    add_subdirectory (tests)
  endif ()
endif ()