project(hedgewars)

#initialise cmake environment

cmake_minimum_required(VERSION 2.6.0)

if(CMAKE_VERSION VERSION_LESS "2.8")

    set(WARNING "WARNING: ")

    set(allow_parse_args FALSE)

else()

    set(WARNING WARNING)

    set(allow_parse_args TRUE)

endif()

foreach(hwpolicy CMP0003 CMP0012 CMP0017)

    if(POLICY ${hwpolicy})

        cmake_policy(SET ${hwpolicy} NEW)

    endif()

endforeach()

set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake_modules")

#possible cmake configuration

option(NOSERVER "Disable gameServer build (off)]" OFF)

option(NOPNG "Disable screenshoot compression (off)" OFF)

option(NOVIDEOREC "Disable video recording (off)" OFF)

#set this to ON when 2.1.0 becomes more widespread (and only for linux)

option(SYSTEM_PHYSFS "Use system physfs (off)" OFF)

option(LIBENGINE "Enable hwengine library (off)" OFF)

option(ANDROID "Enable Android build (off)" OFF)

if(UNIX AND NOT APPLE)

    option(MINIMAL_FLAGS "Respect system flags as much as possible (off)" OFF)

else()

    option(NOAUTOUPDATE "Disable OS X Sparkle update checking" OFF)

endif()

option(WEBGL "Enable WebGL build (implies NOPASCAL) [default: off]" OFF)

option(NOPASCAL "Compile hwengine as native C [default: off]" ${WEBGL})

option(GL2 "Enable OpenGL 2 rendering [default: off]" OFF)

set(FPFLAGS "" CACHE STRING "Additional Freepascal flags")

set(GHFLAGS "" CACHE STRING "Additional Haskell flags")

if(UNIX AND NOT APPLE)

    set(DATA_INSTALL_DIR "share/hedgewars" CACHE STRING "Resource folder path")

endif()

#detect Mercurial revision and init rev/hash information

find_program(HGCOMMAND hg)

if(HGCOMMAND AND (EXISTS ${CMAKE_SOURCE_DIR}/.hg))

    execute_process(COMMAND ${HGCOMMAND} identify -in

                    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}

                    OUTPUT_VARIABLE internal_version

                    ERROR_QUIET

                )

    #check local repo status

    string(REGEX REPLACE "[^+]" "" HGCHANGED ${internal_version})

    string(REGEX REPLACE "[0-9a-zA-Z]+(.*) ([0-9]+)(.*)" "\\2" HEDGEWARS_REVISION ${internal_version})

    string(REGEX REPLACE "([0-9a-zA-Z]+)(.*) [0-9]+(.*)" "\\1" HEDGEWARS_HASH ${internal_version})

    if(HGCHANGED)

        message(${WARNING} "You have uncommitted changes in your repository!")

    endif()

    #let's assume that if you have hg you might be interested in debugging

    set(default_build_type "DEBUG")

    #write down hash and rev for easy picking should hg be missing

    file(WRITE "${CMAKE_SOURCE_DIR}/share/version_info.txt" "Hedgewars versioning information, do not modify\nrev ${HEDGEWARS_REVISION}\nhash ${HEDGEWARS_HASH}\n")

else()

    set(default_build_type "RELEASE")

    # when compiling outside rev control, fetch revision and hash information from version_info.txt

    find_file(version_info version_info.txt PATH ${CMAKE_SOURCE_DIR}/share)

    if(version_info)

        file(STRINGS ${version_info} internal_version REGEX "rev")

        string(REGEX REPLACE "rev ([0-9]*)" "\\1" HEDGEWARS_REVISION ${internal_version})

        file(STRINGS ${version_info} internal_version REGEX "hash")

        string(REGEX REPLACE "hash ([a-zA-Z0-9]*)" "\\1" HEDGEWARS_HASH ${internal_version})

    else()

        message(${WARNING} "${CMAKE_SOURCE_DIR}/share/version_info.txt not found, revision information "

                           "will be incorrect!!! Contact your source provider to fix this!")

        set(HEDGEWARS_REVISION "0000")

        set(HEDGEWARS_HASH "unknown")

    endif()

endif()

#versioning

set(CPACK_PACKAGE_VERSION_MAJOR 0)

set(CPACK_PACKAGE_VERSION_MINOR 9)

set(CPACK_PACKAGE_VERSION_PATCH 19)

set(HEDGEWARS_PROTO_VER 44)

set(HEDGEWARS_VERSION "${CPACK_PACKAGE_VERSION_MAJOR}.${CPACK_PACKAGE_VERSION_MINOR}.${CPACK_PACKAGE_VERSION_PATCH}")

set(required_clang_version 3.0)

message(STATUS "Building ${HEDGEWARS_VERSION}-r${HEDGEWARS_REVISION} (${HEDGEWARS_HASH})")

if (${NOPASCAL})

    find_package(Clang)

    # Check LLVM/Clang version

	if (CLANG_VERSION VERSION_LESS required_clang_version)

		message(FATAL_ERROR "LLVM/Clang compiler required version is ${required_clang_version} but version ${CLANG_VERSION} was found!")

	else()

		message(STATUS "Found CLANG: ${CLANG_EXECUTABLE} (version ${CLANG_VERSION})")

	endif()

endif(${NOPASCAL})

#where to build libs and bins

set(EXECUTABLE_OUTPUT_PATH ${PROJECT_BINARY_DIR}/bin)

set(LIBRARY_OUTPUT_PATH ${PROJECT_BINARY_DIR}/bin)

#resource paths

if(UNIX AND NOT APPLE)

    set(target_binary_install_dir "bin")

    set(target_library_install_dir "lib")

    string(SUBSTRING "${DATA_INSTALL_DIR}" 0 1 sharepath_start)

    if (NOT (${sharepath_start} MATCHES "/"))

        set(HEDGEWARS_DATADIR "${CMAKE_INSTALL_PREFIX}/${DATA_INSTALL_DIR}/")

    else()

        set(HEDGEWARS_DATADIR "${DATA_INSTALL_DIR}/")

    endif()

    set(HEDGEWARS_FULL_DATADIR "${HEDGEWARS_DATADIR}")

else()

    set(target_binary_install_dir "./")

    if(APPLE)

        set(target_library_install_dir "../Frameworks/")

        set(CMAKE_INSTALL_PREFIX "Hedgewars.app/Contents/MacOS/")

        set(HEDGEWARS_DATADIR "../Resources/")

        set(HEDGEWARS_FULL_DATADIR "/Applications/${CMAKE_INSTALL_PREFIX}/${HEDGEWARS_DATADIR}")

    elseif(WIN32)

        set(target_library_install_dir "./")

        set(HEDGEWARS_DATADIR "./")

        set(HEDGEWARS_FULL_DATADIR "${CMAKE_INSTALL_PREFIX}/")

        link_directories("${EXECUTABLE_OUTPUT_PATH}" "${CMAKE_SOURCE_DIR}/misc/winutils/bin")

    endif()

endif()

if(APPLE)

    set(CMAKE_FIND_FRAMEWORK "FIRST")

    #what system are we building for

    set(minimum_macosx_version $ENV{MACOSX_DEPLOYMENT_TARGET})

    #detect on which system we are: if sw_vers cannot be found for any reason (re)use minimum_macosx_version

    find_program(sw_vers sw_vers)

    if(sw_vers)

        execute_process(COMMAND ${sw_vers} "-productVersion"

                        OUTPUT_VARIABLE current_macosx_version

                        OUTPUT_STRIP_TRAILING_WHITESPACE)

        string(REGEX REPLACE "([0-9]+.[0-9]+).[0-9]+" "\\1" current_macosx_version ${current_macosx_version})

    else()

        if(NOT minimum_macosx_version)

            message(FATAL_ERROR "sw_vers not found! Need explicit MACOSX_DEPLOYMENT_TARGET variable set")

        else()

            message(${WARNING} "sw_vers not found! Fallback to MACOSX_DEPLOYMENT_TARGET variable")

            set(current_macosx_version ${minimum_macosx_version})

        endif()

    endif()

    #if nothing is set, we deploy only for the current system

    if(NOT minimum_macosx_version)

        set(minimum_macosx_version ${current_macosx_version})

    endif()

    #lower systems don't have enough processing power anyway

    if (minimum_macosx_version VERSION_LESS "10.4")

        message(FATAL_ERROR "Hedgewars is not supported on Mac OS X pre-10.4")

    endif()

    #workaround for http://playcontrol.net/ewing/jibberjabber/big_behind-the-scenes_chang.html#SDL_mixer (Update 2)

    if(current_macosx_version VERSION_EQUAL "10.4")

        find_package(SDL_mixer REQUIRED)

        set(DYLIB_SMPEG "-dylib_file @loader_path/Frameworks/smpeg.framework/Versions/A/smpeg:${SDLMIXER_LIBRARY}/Versions/A/Frameworks/smpeg.framework/Versions/A/smpeg")

        set(DYLIB_MIKMOD "-dylib_file @loader_path/Frameworks/mikmod.framework/Versions/A/mikmod:${SDLMIXER_LIBRARY}/Versions/A/Frameworks/mikmod.framework/Versions/A/mikmod")

        set(CMAKE_C_FLAGS "${DYLIB_SMPEG} ${DYLIB_MIKMOD}")

        list(APPEND pascal_flags "-k${DYLIB_SMPEG}" "-k${DYLIB_MIKMOD}")

    endif()

    #CMAKE_OSX_ARCHITECTURES and CMAKE_OSX_SYSROOT need to be set for universal binary and correct linking

    if(NOT CMAKE_OSX_ARCHITECTURES)

        if(current_macosx_version VERSION_LESS "10.6")

            if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "powerpc*")

                set(CMAKE_OSX_ARCHITECTURES "ppc7400")

            else()

                set(CMAKE_OSX_ARCHITECTURES "i386")

            endif()

        else()

            set(CMAKE_OSX_ARCHITECTURES "x86_64")

        endif()

    endif()

    #CMAKE_OSX_SYSROOT is set at the system version we are supposed to build on

    #we need to provide the correct one when host and target differ

    if(NOT ${minimum_macosx_version} VERSION_EQUAL ${current_macosx_version})

        if(minimum_macosx_version VERSION_EQUAL "10.4")

            set(CMAKE_OSX_SYSROOT "/Developer/SDKs/MacOSX10.4u.sdk/")

            set(CMAKE_C_COMPILER "gcc-4.0")

            set(CMAKE_CXX_COMPILER "g++-4.0")

        else()

            string(REGEX REPLACE "([0-9]+.[0-9]+).[0-9]+" "\\1" sdk_version ${minimum_macosx_version})

            set(CMAKE_OSX_SYSROOT "/Developer/SDKs/MacOSX${sdk_version}.sdk/")

        endif()

    endif()

    #add user framework directory, other paths can be passed via FPFLAGS

    list(APPEND pascal_flags "-Ff~/Library/Frameworks")

    #set deployment target

    list(APPEND pascal_flags "-k-macosx_version_min" "-k${minimum_macosx_version}" "-XR${CMAKE_OSX_SYSROOT}")

endif(APPLE)

#when build type is not specified, assume Debug/Release according to build version information

if (CMAKE_BUILD_TYPE)

    string (TOUPPER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE)

    if ( NOT( (CMAKE_BUILD_TYPE MATCHES "RELEASE") OR (CMAKE_BUILD_TYPE MATCHES "DEBUG") ) )

        set (CMAKE_BUILD_TYPE ${default_build_type} CACHE STRING "Build type (Debug/Release)" FORCE)

        message (STATUS "Unknown build type, using default (${default_build_type})")

    endif ()

else (CMAKE_BUILD_TYPE)

    set (CMAKE_BUILD_TYPE ${default_build_type} CACHE STRING "Build type (Debug/Release)" FORCE)

endif (CMAKE_BUILD_TYPE)

#set default flags values for all projects (unless MINIMAL_FLAGS is true)

if(NOT ${MINIMAL_FLAGS})

    set(CMAKE_C_FLAGS "-pipe ${CMAKE_C_FLAGS}")

    set(CMAKE_C_FLAGS_RELEASE "-w -Os -fomit-frame-pointer ${CMAKE_C_FLAGS_RELEASE}")

    set(CMAKE_C_FLAGS_DEBUG "-Wall -O0 -g -DDEBUG ${CMAKE_C_FLAGS_DEBUG}")

    set(CMAKE_CXX_FLAGS ${CMAKE_C_FLAGS})

    set(CMAKE_CXX_FLAGS_RELEASE ${CMAKE_C_FLAGS_RELEASE})

    set(CMAKE_CXX_FLAGS_DEBUG ${CMAKE_C_FLAGS_DEBUG})

else()

    #CMake adds a lot of additional configuration flags, so let's clear them up

    set(CMAKE_C_FLAGS_RELEASE "")

    set(CMAKE_C_FLAGS_DEBUG "-Wall -DDEBUG")

    set(CMAKE_CXX_FLAGS_RELEASE "")

    set(CMAKE_CXX_FLAGS_DEBUG "-Wall -DDEBUG")

endif()

#TODO: find out why we need this...

include(CheckCCompilerFlag)

set(CMAKE_REQUIRED_FLAGS "-Wl,-z -Wl,noexecstack")

check_c_compiler_flag("" HAVE_NOEXECSTACK) #empty because we are testing a linker flag

if(HAVE_NOEXECSTACK)

    list(APPEND pascal_flags "-k-z" "-knoexecstack")

    if(NOT ${MINIMAL_FLAGS})

        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${CMAKE_REQUIRED_FLAGS}")

    endif()

endif()

unset(CMAKE_REQUIRED_FLAGS)

#parse additional parameters

if(FPFLAGS OR GHFLAGS)

    if(${allow_parse_args})

        message(${WARNING} "FPFLAGS and GHFLAGS are available only when using CMake >= 2.8")

    else()

        separate_arguments(fpflags_parsed UNIX_COMMAND ${FPFLAGS})

        separate_arguments(ghflags_parsed UNIX_COMMAND ${GHFLAGS})

    endif()

endif()

list(APPEND pascal_flags ${fpflags_parsed}            # user flags

                 "-B"                                 # compile all units

                 "-vm4079,4080,4081"                  # fpc verbosity output format

                 "-FE${PROJECT_BINARY_DIR}/bin"       # fpc binaries output directory

                 "-FU${PROJECT_BINARY_DIR}/hedgewars" # fpc units output directory

                 "-Fl${PROJECT_BINARY_DIR}/bin"       # fpc linking directory (win/unix)

                 "-Fi${PROJECT_BINARY_DIR}/hedgewars" # fpc .inc path (for out of source builds)

                 "-k-L${PROJECT_BINARY_DIR}/bin"      # ld linking directory (unix/osx)

                 "-Cs2000000"                         # stack size

                 "-vewnq"                             # fpc output verbosity

                 "-dDEBUGFILE"                        # macro for engine output

                 )

list(APPEND haskell_flags ${ghflags_parsed} # user flags

                 "-O2"                      # optimise for faster code

                 )

#get BUILD_TYPE and enable/disable optimisation

message(STATUS "Using ${CMAKE_BUILD_TYPE} configuration")

if(CMAKE_BUILD_TYPE MATCHES "DEBUG")

    list(APPEND pascal_flags "-O-" # disable all optimisations

                             "-g"  # enable debug symbols

                             "-gl" # add line info to bt

                             "-gv" # allow valgrind

                             )

    list(APPEND haskell_flags "-Wall"       # all warnings

                              "-debug"      # debug mode

                              "-dcore-lint" # internal sanity check

                              )

else()

    list(APPEND pascal_flags "-Os" # optimise for size

                             "-Xs" # strip binary

                             "-Si" # turn on inlining

                             )

    list(APPEND haskell_flags "-w" # no warnings

                              )

endif()

include(${CMAKE_MODULE_PATH}/utils.cmake)

#Haskell compiler discovery (for server and engine in c)

if((NOT NOSERVER) OR NOPASCAL)

    if(GHC)

        set(ghc_executable ${GHC})

    else()

        find_program(ghc_executable ghc)

    endif()

    if(ghc_executable)

        exec_program(${ghc_executable} ARGS "-V" OUTPUT_VARIABLE ghc_version_long)

        string(REGEX REPLACE ".*([0-9]+\\.[0-9]+\\.[0-9]+)" "\\1" ghc_version "${ghc_version_long}")

        message(STATUS "Found GHC: ${ghc_executable} (version ${ghc_version})")

    else()

        message(STATUS "Could NOT find GHC, needed by gameServer and pas2c")

    endif()

endif()

#check gameServer

if((ghc_executable) AND (NOT NOSERVER) AND (NOT WEBGL))

    set(HAVE_NETSERVER true)

    add_subdirectory(gameServer)

else()

    message(STATUS "Skipping gameServer target")

    set(HAVE_NETSERVER false)

endif()

#lua discovery

find_package(Lua)

if(LUA_FOUND AND (NOT WEBGL))

    message(STATUS "Found LUA: ${LUA_DEFAULT}")

else()

    message(STATUS "Using internal LUA library")

    add_subdirectory(misc/liblua)

    #linking with liblua.a requires system readline

    list(APPEND pascal_flags "-k${EXECUTABLE_OUTPUT_PATH}/lib${LUA_LIBRARY}.a" "-k-lreadline")

endif()

#physfs discovery

if (${SYSTEM_PHYSFS})

    if (NOT PHYSFS_LIBRARY OR NOT PHYSFS_INCLUDE_DIR)

        find_package(PhysFS)

    endif()

    find_file(physfs_h physfs.h ${PHYSFS_INCLUDE_DIR})

    if(physfs_h)

        file(STRINGS ${physfs_h} physfs_majorversion REGEX "PHYSFS_VER_MAJOR[\t' ']+[0-9]+")

        file(STRINGS ${physfs_h} physfs_minorversion REGEX "PHYSFS_VER_MINOR[\t' ']+[0-9]+")

        file(STRINGS ${physfs_h} physfs_patchversion REGEX "PHYSFS_VER_PATCH[\t' ']+[0-9]+")

        string(REGEX MATCH "([0-9]+)" physfs_majorversion "${physfs_majorversion}")

        string(REGEX MATCH "([0-9]+)" physfs_minorversion "${physfs_minorversion}")

        string(REGEX MATCH "([0-9]+)" physfs_patchversion "${physfs_patchversion}")

        set(physfs_detected_ver "${physfs_majorversion}.${physfs_minorversion}.${physfs_patchversion}")

        if (physfs_detected_ver VERSION_LESS "2.1.0")

            message(FATAL_ERROR "PhysFS version is too old (dected ${physfs_detected_ver}, required 2.1.0)")

            set(physfs_too_old true)

        endif()

    endif()

    if (NOT PHYSFS_LIBRARY OR NOT PHYSFS_INCLUDE_DIR)

        message(FATAL_ERROR "Missing PhysFS! Rerun cmake with -DPHYSFS_SYSTEM=off to build the internal version")

    endif()

else()

    message(STATUS "PhysFS will be provided by the bundled sources")

    set(physfs_output_name "hw_physfs")

    add_subdirectory(misc/libphysfs)

    #-XLA is a beta fpc flag that renames libraries before passing them to the linker

    #we also have to pass PHYSFS_INTERNAL to satisfy windows runtime requirements

    #(should be harmless on other platforms)

    list(APPEND pascal_flags "-XLAphysfs=${physfs_output_name}" "-dPHYSFS_INTERNAL")

endif()

find_package_or_disable_msg(FFMPEG NOVIDEOREC "Video recording will not be built")

#physfs helper library

add_subdirectory(misc/libphyslayer)

if(NOPASCAL)

    if (NOT ghc_executable)

        message(FATAL_ERROR "A Haskell compiler is required to build engine in C")

    endif()

    #pascal to c converter

    add_subdirectory(tools/pas2c)

    add_subdirectory(project_files/hwc)

else()

    #main pascal engine

    add_subdirectory(hedgewars)

endif()

if(WEBGL)

    #WEBGL deps

else(WEBGL)

    #Android related build scripts

    #TODO: when ANDROID, LIBENGINE should be set

    if(ANDROID)

        add_subdirectory(project_files/Android-build)

    else(ANDROID)

        add_subdirectory(bin)

        add_subdirectory(QTfrontend)

        add_subdirectory(share)

        add_subdirectory(tools)

    endif(ANDROID)

endif(WEBGL)

include(${CMAKE_MODULE_PATH}/CPackConfig.cmake)