project(hedgewars)

#initialise cmake environment

cmake_minimum_required(VERSION 2.6.4)

foreach(hwpolicy CMP0003 CMP0012 CMP0017 CMP0018)

    if(POLICY ${hwpolicy})

        cmake_policy(SET ${hwpolicy} NEW)

    endif()

endforeach()

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

include(${CMAKE_MODULE_PATH}/utils.cmake)

#possible cmake configuration

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

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

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

#libraries are built shared unless explicitly added as a static

option(BUILD_SHARED_LIBS "Build libraries as shared modules (on)" ON)

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

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

if(WIN32 OR APPLE)

    option(LUA_SYSTEM "Use system lua (off)" OFF)

else()

    option(LUA_SYSTEM "Use system lua (on)" ON)

endif()

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

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

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

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

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

if(UNIX AND NOT APPLE)

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

endif()

#versioning

set(CPACK_PACKAGE_VERSION_MAJOR 0)

set(CPACK_PACKAGE_VERSION_MINOR 9)

set(CPACK_PACKAGE_VERSION_PATCH 20)

set(HEDGEWARS_PROTO_VER 48)

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

include(${CMAKE_MODULE_PATH}/revinfo.cmake)

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

#general utilities

include(${CMAKE_MODULE_PATH}/utils.cmake)

#paths initialization

include(${CMAKE_MODULE_PATH}/paths.cmake)

#platform specific init code

include(${CMAKE_MODULE_PATH}/platform.cmake)

#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)

#perform safe check that enable/disable compilation features

include(${CMAKE_MODULE_PATH}/compilerchecks.cmake)

#set default compiler flags

add_flag_append(CMAKE_C_FLAGS "-Wall -pipe")

add_flag_append(CMAKE_C_FLAGS_RELEASE "-O2")

add_flag_append(CMAKE_C_FLAGS_DEBUG "-Wextra -O0")

add_flag_append(CMAKE_CXX_FLAGS "-Wall -pipe")

add_flag_append(CMAKE_CXX_FLAGS_RELEASE "-O2")

add_flag_append(CMAKE_CXX_FLAGS_DEBUG "-Wextra -O0")

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

if(${MINIMAL_FLAGS})

    unset(CMAKE_C_FLAGS_RELEASE)

    unset(CMAKE_C_FLAGS_DEBUG)

    unset(CMAKE_CXX_FLAGS_RELEASE)

    unset(CMAKE_CXX_FLAGS_DEBUG)

endif()

#parse additional parameters

if(GHFLAGS)

    if(${CMAKE_VERSION} VERSION_GREATER 2.6)

        separate_arguments(ghflags_parsed UNIX_COMMAND ${GHFLAGS})

    else()

        message("*** GHFLAGS are available only when using CMake >= 2.8 ***")

    endif()

endif()

list(APPEND haskell_flags ${ghflags_parsed} "-O2")

#get BUILD_TYPE and enable/disable optimisation

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

if(CMAKE_BUILD_TYPE MATCHES "DEBUG")

    list(APPEND haskell_flags "-Wall"       # all warnings

                              "-debug"      # debug mode

                              "-dcore-lint" # internal sanity check

                              "-fno-warn-unused-do-bind"

                              )

else()

    list(APPEND haskell_flags "-w" # no warnings

                              )

endif()

#build engine without freepascal

if(${NOPASCAL})

    find_package(Clang REQUIRED)

    if(CLANG_VERSION VERSION_LESS "3.0")

        message(FATAL_ERROR "LLVM/Clang compiler required version is 3.0 but version ${CLANG_VERSION} was found!")

    endif()

    set(CMAKE_C_COMPILER ${CLANG_EXECUTABLE})

    set(CMAKE_CXX_COMPILER ${CLANG_EXECUTABLE})

endif(${NOPASCAL})

#server

if(NOT NOSERVER)

    add_subdirectory(gameServer)

endif()

#lua discovery

if (${LUA_SYSTEM})

    if (NOT LUA_LIBRARY OR NOT LUA_INCLUDE_DIR)

        find_package(Lua)

    endif()

    if (LUA_LIBRARY AND LUA_INCLUDE_DIR)

        set(LUA_FOUND TRUE)

        #use an IMPORTED tharget so that we can just use 'lua' to link

        add_library(lua UNKNOWN IMPORTED)

        set_target_properties(lua PROPERTIES IMPORTED_LOCATION ${LUA_LIBRARY})

    else()

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

    endif()

else()

    if (NOT LUA_LIBRARY OR NOT LUA_INCLUDE_DIR)

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

    endif()

    set(lua_output_name "hwlua")

    add_subdirectory(misc/liblua)

endif()

#physfs discovery

if (${PHYSFS_SYSTEM})

    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")

    else()

        #use an IMPORTED tharget so that we can just use 'physfs' to link

        add_library(physfs UNKNOWN IMPORTED)

        set_target_properties(physfs PROPERTIES IMPORTED_LOCATION ${PHYSFS_LIBRARY})

    endif()

else()

    if (NOT PHYSFS_LIBRARY OR NOT PHYSFS_INCLUDE_DIR)

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

    endif()

    set(physfs_output_name "hwphysfs")

    add_subdirectory(misc/libphysfs)

endif()

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

#physfs helper library

add_subdirectory(misc/libphyslayer)

if(NOT BUILD_ENGINE_LIBRARY AND APPLE)

    add_subdirectory(hedgewars/sdlmain)

endif()

#TODO: nowadays this could be merged inside hedgewars/CMakeLists.txt

if(NOPASCAL)

    #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, BUILD_ENGINE_LIBRARY 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}/cpackvars.cmake)