# This is the cmake-based build system for Quassel IRC.
#
# You may pass various options to cmake:
# -DWANT_(CORE|QTCLIENT|MONO)=(ON|OFF)
#                     : select binaries to build
# -DWITH_OPENSSL=OFF  : Disable OpenSSL support
# -DWITH_DBUS=OFF     : Disable D-Bus support (dbus notifications)
# -DWITH_WEBKIT=OFF   : Disable WebKit support (link previews)
# -DWITH_PHONON=OFF   : Disable Phonon support (audio notifications)
# -DWITH_KDE=ON       : Enable KDE4 support
#
# -DEMBED_DATA=ON     : Embed all data files in icons the binary, rather than installing them separately
#
# -DQT=/path/to/qt    : Choose a Qt4 installation to use instead of the system Qt4
# -DSTATIC=ON         : Enable static building of Quassel. Use with care.
# -DDEPLOY=ON         : Mac OS X only. Use only for creating Quassel Packages!
#
# NOTE: You should remove CMakeCache.txt if you plan to change any of these values!

project(QuasselIRC)

cmake_minimum_required(VERSION 2.6.0 FATAL_ERROR)

if(COMMAND cmake_policy)
   cmake_policy(SET CMP0003 NEW)
endif(COMMAND cmake_policy)

# Use our own (well, and KDE's) version of some modules
# In particular cmake's own FindQt4 and FindOpenSSL are quite buggy
set(CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/modules)
include(QuasselMacros)

# Various options and variables that can be set on the command line
option(WANT_CORE     "Build the core (server) binary"           ON)
option(WANT_QTCLIENT "Build the Qt4 GUI client binary"          ON)
option(WANT_MONO     "Build the monolithic (all-in-one) binary" ON)

option(WITH_OPENSSL  "Enable OpenSSL support if present on the system"	ON)
option(WITH_DBUS     "Enable D-Bus support if present on the system"	ON)
option(WITH_WEBKIT   "Enable WebKit support (for link previews)"	ON)
option(WITH_PHONON   "Enable Phonon support (for audio notifications)"	ON)
option(WITH_KDE      "Enable KDE4 integration"				OFF)

# We use icon paths from KDE 4.3 trunk, which are partially invalid on older and possibly
# even on newer KDE versions. Do not disable this unless you are sure that your Quassel will
# run on a matching KDE version only.
option(WITH_OXYGEN   "Install Oxygen icons. Heavily recommended unless you use KDE 4.3" ON)

option(STATIC        "Enable static building (might not be portable)" OFF)

if(APPLE)
  option(DEPLOY        "Mac OS X only! Adds required libs to bundle resources and create a dmg. Note: requires Qt to be built with 10.4u SDK" OFF)
endif(APPLE)

# Default to embedding data in the static case
if(STATIC OR WIN32)
  set(EMBED_DEFAULT ON)
else(STATIC OR WIN32)
  set(EMBED_DEFAULT ON) # should be OFF as soon as everything works
endif(STATIC OR WIN32)

option(EMBED_DATA    "Embed all data files in the binary (rather than installing them separately)"   ${EMBED_DEFAULT})

set(QT "" CACHE STRING "Path to a Qt installation to use instead of the system Qt (e.g. for static builds)")
set(LINGUAS "" CACHE STRING "Comma-separated list of locales specifying languages that should be compiled")

# Some settings imply others
if(STATIC)
  add_definitions(-DSTATIC)
  set(WITH_KDE OFF CACHE BOOL "Static building with KDE is not supported")
endif(STATIC)

if(WIN32)
  # We don't support separately installed resources yet on Win32
  set(EMBED_DATA ON)
endif(WIN32)

# Build Type
# We need to make sure it's not empty
# Supported: Release, RelWithDebugInfo, Debug, Debugfull

# On WIN32, only Release seems to work correctly (?)
if(WIN32)
  set(DEFAULT_BUILD_TYPE "Release")
else(WIN32)
  set(DEFAULT_BUILD_TYPE "RelWithDebugInfo")
endif(WIN32)

set(CMAKE_BUILD_TYPE ${DEFAULT_BUILD_TYPE} CACHE STRING "CMake Build Type")
if(NOT CMAKE_BUILD_TYPE)
  set(CMAKE_BUILD_TYPE ${DEFAULT_BUILD_TYPE} CACHE STRING "CMake Build Type" FORCE)
endif(NOT CMAKE_BUILD_TYPE)

# Enable various flags on gcc
if(CMAKE_COMPILER_IS_GNUCXX)
  # Let's just hope that all gccs support these options and skip the tests...
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -ansi -Wall -Wextra -Wnon-virtual-dtor")
  set(CMAKE_CXX_FLAGS_RELWITHDEBUGINFO "-O2")
  set(CMAKE_CXX_FLAGS_DEBUG "-g -fno-reorder-blocks -fno-schedule-insns -fno-inline")
  set(CMAKE_CXX_FLAGS_DEBUGFULL "-g3")
endif(CMAKE_COMPILER_IS_GNUCXX)

set(QT_MIN_VERSION "4.4.0")

if(APPLE AND DEPLOY)
  set(CMAKE_OSX_ARCHITECTURES "i386;ppc")
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mmacosx-version-min=10.4")
  set(CMAKE_OSX_SYSROOT "/Developer/SDKs/MacOSX10.4u.sdk/")
  add_definitions(-DMAC_10_4_SDK)
endif(APPLE AND DEPLOY)

# Execinfo is needed for generating backtraces
find_package(ExecInfo)
if(EXECINFO_FOUND)
  add_definitions(-DHAVE_EXECINFO)
  include_directories(${EXECINFO_INCLUDES})
  link_libraries(${EXECINFO_LIBRARIES})
endif(EXECINFO_FOUND)

# Select a Qt installation here, if you don't want to use system Qt
if(QT)
  # FindQt4 will look for the qmake binary in $PATH, so we just prepend the Qt dir
  set(ENV{PATH} ${QT}/bin:$ENV{PATH})
endif(QT)

# Now that we have the correct $PATH, lets find Qt!
find_package(Qt4 REQUIRED)

set(QT_DONT_USE_QTGUI 1)
include(${QT_USE_FILE})
include_directories(${QT_INCLUDES})

# Setup OpenSSL
if(WITH_OPENSSL)
  find_package(OpenSSL)
else(WITH_OPENSSL)
  message(STATUS "Disabling OpenSSL support")
endif(WITH_OPENSSL)

if(OPENSSL_FOUND)
  if(NOT QT_DEFINITIONS MATCHES "QT_NO_OPENSSL")
    message(STATUS "Found OpenSSL support in Qt")
    add_definitions(-DHAVE_SSL)
    set(HAVE_SSL true)
    set(MOC_DEFINES ${MOC_DEFINES} -DHAVE_SSL)
  else(NOT QT_DEFINITIONS MATCHES "QT_NO_OPENSSL")
    message(STATUS "No OpenSSL support found in Qt, disabling")
  endif(NOT QT_DEFINITIONS MATCHES "QT_NO_OPENSSL")
else(OPENSSL_FOUND)
  add_definitions(-DQT_NO_OPENSSL)
endif(OPENSSL_FOUND)

# Setup D-Bus support
if(WITH_DBUS)
  if(QT_QTDBUS_FOUND)
    message(STATUS "Found QtDBus, enabling D-Bus support")
    add_definitions(-DHAVE_DBUS)
    set(LINK_DBUS DBUS)
    set(HAVE_DBUS true)
    set(MOC_DEFINES ${MOC_DEFINES} -DHAVE_DBUS)
  else(QT_QTDBUS_FOUND)
    message(STATUS "QtDBus not found, disabling D-Bus support")
  endif(QT_QTDBUS_FOUND)
else(WITH_DBUS)
  message(STATUS "Disabling D-Bus support")
endif(WITH_DBUS)

# Setup QtWebKit support
if(WITH_WEBKIT)
  if(QT_QTWEBKIT_FOUND)
    message(STATUS "Found QtWebKit, enabling WebKit support")
    add_definitions(-DHAVE_WEBKIT)
    set(LINK_WEBKIT WEBKIT)
    set(HAVE_WEBKIT true)
    set(MOC_DEFINES ${MOC_DEFINES} -DHAVE_WEBKIT)
  else(QT_QTWEBKIT_FOUND)
    message(STATUS "QtWebKit not found, disabling WebKit support")
  endif(QT_QTWEBKIT_FOUND)
else(WITH_WEBKIT)
  message(STATUS "Disabling WebKit support")
endif(WITH_WEBKIT)

# Setup KDE4 support
if(WITH_KDE)
  find_package(KDE4)
  if(KDE4_FOUND)
    message(STATUS "Enabling KDE4 integration")
    include_directories(${KDE4_INCLUDES})
    add_definitions(-DHAVE_KDE ${KDE4_DEFINITIONS})
    set(HAVE_KDE 1)
    set(MOC_DEFINES ${MOC_DEFINES} -DHAVE_KDE)
    set(QUASSEL_KDE_LIBRARIES ${KDE4_KDECORE_LIBS} ${KDE4_KDEUI_LIBRARY} knotifyconfig)
    # We always use external icons for KDE4 support, since we use its iconloader rather than our own
    set(EMBED_DATA OFF)
  else(KDE4_FOUND)
    message(STATUS "KDE4 not found, disabling KDE integration")
  endif(KDE4_FOUND)
else(WITH_KDE)
  message(STATUS "Disabling KDE4 integration")
endif(WITH_KDE)

# Setup Phonon support - we only need this if we don't have or want KDE4
if(NOT HAVE_KDE)
  if(WITH_PHONON)
    find_package(Phonon)
    if(PHONON_FOUND)
      message(STATUS "Enabling Phonon support")
      add_definitions(-DHAVE_PHONON)
      set(HAVE_PHONON true)
      set(MOC_DEFINES ${MOC_DEFINES} -DHAVE_PHONON)
    else(PHONON_FOUND)
      message(STATUS "Phonon not found, disabling audio notifications")
    endif(PHONON_FOUND)
  else(WITH_PHONON)
    message(STATUS "Disabling Phonon support")
  endif(WITH_PHONON)
endif(NOT HAVE_KDE)

# Now set up install locations; those are set by KDE if integration is enabled
if(NOT HAVE_KDE)
  if(WIN32)
    set(BIN_INSTALL_DIR ${CMAKE_INSTALL_PREFIX} CACHE FILEPATH "Install path for binaries")
    set(DATA_INSTALL_DIR $ENV{APPDATA}/quassel-irc.org/share/apps CACHE FILEPATH "Install path for data files")
    set(ICON_INSTALL_DIR $ENV{APPDATA}/quassel-irc.org/share/icons CACHE FILEPATH "Global icon install path")
    set(XDG_APPS_INSTALL_DIR $ENV{APPDATA}/quassel-irc.org/share/applications CACHE FILEPATH "Install path for .desktop files")
  else(WIN32)
    set(BIN_INSTALL_DIR ${CMAKE_INSTALL_PREFIX}/bin CACHE FILEPATH "Install path for binaries")
    set(DATA_INSTALL_DIR ${CMAKE_INSTALL_PREFIX}/share/apps CACHE FILEPATH "Install path for data files")
    set(ICON_INSTALL_DIR ${CMAKE_INSTALL_PREFIX}/share/icons CACHE FILEPATH "Global icon install path")
    set(XDG_APPS_INSTALL_DIR ${CMAKE_INSTALL_PREFIX}/share/applications CACHE FILEPATH "Install path for .desktop files")
  endif(WIN32)
endif(NOT HAVE_KDE)

# RPATH needs to be set correctly
# Do this down here, since otherwise KDE wants to handle it itself, and fails
set(CMAKE_INSTALL_RPATH_USE_LINK_PATH 1)
set(CMAKE_BUILD_WITH_INSTALL_RPATH 1)

# Set global buildflags
# This is very much non-portable, so don't use -DSTATIC until you know what
# you do.
if(STATIC AND CMAKE_COMPILER_IS_GNUCXX)
  set(CMAKE_CXX_FLAGS "-static-libgcc ${CMAKE_CXX_FLAGS}")
  link_directories(${CMAKE_BINARY_DIR}/staticlibs) # override dynamic libs
  if(HAVE_SSL)
    set(QUASSEL_SSL_LIBRARIES ssl crypto)  # these miss in static builds
  endif(HAVE_SSL)
endif(STATIC AND CMAKE_COMPILER_IS_GNUCXX)

if(WIN32)
  link_libraries(imm32 winmm dbghelp Secur32)  # missing by default :/

  if(HAVE_SSL)
     link_libraries(${OPENSSL_LIBRARIES} libeay32MD)
  endif(HAVE_SSL)

  set(RC_WIN32 ../pics/win32.rc)  # for app icons on windows
endif(WIN32)

if(STATIC)
  link_directories(${QT_PLUGINS_DIR}/imageformats)
  link_libraries(qjpeg qgif)
endif(STATIC)

# We need to create a version.gen
# For this, we create our genversion binary and make sure it is run every time.
add_executable(genversion ${CMAKE_SOURCE_DIR}/src/common/genversion.cpp)
target_link_libraries(genversion ${QT_LIBRARIES} ${QT_CORE_LIB_DEPENDENCIES})

get_target_property(GENVERSION_EXECUTABLE genversion LOCATION)
add_custom_target(genversion_run ALL ${GENVERSION_EXECUTABLE}
                  ${CMAKE_SOURCE_DIR} ${CMAKE_BINARY_DIR}/src/version.gen)
add_dependencies(genversion_run genversion)

# These variables will be added to the main targets (CORE, QTCLIENT, MONO)
set(COMMON_DEPS ${RC_WIN32})
set(CORE_DEPS )
set(CLIENT_DEPS )

# Add needed subdirs - the order is important, since src needs some vars set by other dirs
add_subdirectory(data)
add_subdirectory(icons)
add_subdirectory(pics)
add_subdirectory(i18n)
add_subdirectory(src)
