# This is not meant to be included by the top-level.
cmake_minimum_required (VERSION 3.10)
project(NVIM_DEPS C)

if(POLICY CMP0135)
  cmake_policy(SET CMP0135 NEW)
endif()

# Point CMake at any custom modules we may ship
list(APPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake" "${PROJECT_SOURCE_DIR}/../cmake")

include(CheckCCompilerFlag)
include(Util)

set(DEPS_CMAKE_ARGS
  -D CMAKE_C_COMPILER=${CMAKE_C_COMPILER}
  -D CMAKE_C_STANDARD=99
  -D CMAKE_GENERATOR=${CMAKE_GENERATOR}
  -D CMAKE_GENERATOR_PLATFORM=${CMAKE_GENERATOR_PLATFORM}
  -D CMAKE_POSITION_INDEPENDENT_CODE=ON
  -D CMAKE_FIND_FRAMEWORK=${CMAKE_FIND_FRAMEWORK})

set(DEPS_CMAKE_CACHE_ARGS -DCMAKE_OSX_ARCHITECTURES:STRING=${CMAKE_OSX_ARCHITECTURES})

set_default_buildtype()

get_property(isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
if(NOT isMultiConfig)
  list(APPEND DEPS_CMAKE_ARGS -D CMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE})
endif()

set(DEFAULT_MAKE_CFLAGS CFLAGS+=-g)

check_c_compiler_flag(-Og HAS_OG_FLAG)
if(HAS_OG_FLAG)
  set(DEFAULT_MAKE_CFLAGS CFLAGS+=-Og ${DEFAULT_MAKE_CFLAGS})
endif()

set(DEPS_INSTALL_DIR "${CMAKE_BINARY_DIR}/usr")
set(DEPS_BIN_DIR "${DEPS_INSTALL_DIR}/bin")
set(DEPS_LIB_DIR "${DEPS_INSTALL_DIR}/lib")
set(DEPS_BUILD_DIR "${CMAKE_BINARY_DIR}/build")
set(DEPS_DOWNLOAD_DIR "${DEPS_BUILD_DIR}/downloads")
set(DEPS_INCLUDE_FLAGS "-I${DEPS_INSTALL_DIR}/include -I${DEPS_INSTALL_DIR}/include/luajit-2.1")

list(APPEND DEPS_CMAKE_ARGS -D CMAKE_INSTALL_PREFIX=${DEPS_INSTALL_DIR})

option(USE_BUNDLED "Use bundled dependencies." ON)

option(USE_BUNDLED_UNIBILIUM "Use the bundled unibilium." ${USE_BUNDLED})
option(USE_BUNDLED_LIBTERMKEY "Use the bundled libtermkey." ${USE_BUNDLED})
option(USE_BUNDLED_LIBVTERM "Use the bundled libvterm." ${USE_BUNDLED})
option(USE_BUNDLED_LIBUV "Use the bundled libuv." ${USE_BUNDLED})
option(USE_BUNDLED_MSGPACK "Use the bundled msgpack." ${USE_BUNDLED})
option(USE_BUNDLED_LUAJIT "Use the bundled version of luajit." ${USE_BUNDLED})
option(USE_BUNDLED_LUAROCKS "Use the bundled version of luarocks." ${USE_BUNDLED})
option(USE_BUNDLED_LUV "Use the bundled version of luv." ${USE_BUNDLED})
option(USE_BUNDLED_LPEG "Use the bundled lpeg." ${USE_BUNDLED})
#XXX(tarruda): Lua is only used for debugging the functional test client, don't
# build it unless explicitly requested
option(USE_BUNDLED_LUA "Use the bundled version of lua." OFF)
option(USE_BUNDLED_TS_PARSERS "Use the bundled treesitter parsers." ${USE_BUNDLED})
option(USE_BUNDLED_TS "Use the bundled treesitter runtime." ${USE_BUNDLED})

if(USE_BUNDLED AND MSVC)
  option(USE_BUNDLED_GETTEXT "Use the bundled version of gettext." ON)
  option(USE_BUNDLED_LIBICONV "Use the bundled version of libiconv." ON)
else()
  option(USE_BUNDLED_GETTEXT "Use the bundled version of gettext." OFF)
  option(USE_BUNDLED_LIBICONV "Use the bundled version of libiconv." OFF)
endif()

if(WIN32)
  option(USE_BUNDLED_NVIMQT "Bundle neovim-qt" ON)
endif()

option(USE_EXISTING_SRC_DIR "Skip download of deps sources in case of existing source directory." OFF)

find_package(Git)
if(NOT Git_FOUND)
  message(FATAL_ERROR "Git is required to apply patches.")
endif()

if(UNIX)
  find_program(MAKE_PRG NAMES gmake make)
  if(NOT MAKE_PRG)
    message(FATAL_ERROR "GNU Make is required to build the dependencies.")
  else()
    message(STATUS "Found GNU Make at ${MAKE_PRG}")
  endif()
endif()

# When using make, use the $(MAKE) variable to avoid warning about the job
# server.
if(CMAKE_GENERATOR MATCHES "Makefiles")
  set(MAKE_PRG "$(MAKE)")
endif()

if(MINGW AND CMAKE_GENERATOR MATCHES "Ninja")
  find_program(MAKE_PRG NAMES mingw32-make)
  if(NOT MAKE_PRG)
    message(FATAL_ERROR "GNU Make for mingw32 is required to build the dependencies.")
  else()
    message(STATUS "Found GNU Make for mingw32: ${MAKE_PRG}")
  endif()
endif()

set(DEPS_C_COMPILER "${CMAKE_C_COMPILER}")

if(CMAKE_OSX_SYSROOT)
  set(DEPS_C_COMPILER "${DEPS_C_COMPILER} -isysroot${CMAKE_OSX_SYSROOT}")
endif()

if(CMAKE_OSX_ARCHITECTURES)
  # The LuaJIT build does not like being passed multiple `-arch` flags
  # so we handle a universal build the old-fashioned way.
  set(LUAJIT_C_COMPILER "${DEPS_C_COMPILER}")
  foreach(ARCH IN LISTS CMAKE_OSX_ARCHITECTURES)
    set(DEPS_C_COMPILER "${DEPS_C_COMPILER} -arch ${ARCH}")
  endforeach()
endif()

# If the macOS deployment target is not set manually (via $MACOSX_DEPLOYMENT_TARGET),
# fall back to local system version. Needs to be done here and in top-level CMakeLists.txt.
if(APPLE)
  if(NOT CMAKE_OSX_DEPLOYMENT_TARGET)
    execute_process(COMMAND sw_vers -productVersion
                    OUTPUT_VARIABLE MACOS_VERSION
                    OUTPUT_STRIP_TRAILING_WHITESPACE)
    set(CMAKE_OSX_DEPLOYMENT_TARGET "${MACOS_VERSION}")
  endif()
  message(STATUS "Using deployment target ${CMAKE_OSX_DEPLOYMENT_TARGET}")
endif()

include(ExternalProject)
set_directory_properties(PROPERTIES EP_PREFIX "${DEPS_BUILD_DIR}")

file(READ deps.txt DEPENDENCIES)
STRING(REGEX REPLACE "\n" ";" DEPENDENCIES "${DEPENDENCIES}")
foreach(dep ${DEPENDENCIES})
  STRING(REGEX REPLACE " " ";" dep "${dep}")
  list(GET dep 0 name)
  list(GET dep 1 value)

  if(name MATCHES "^.*URL$")
    mark_as_advanced(${name})
    if(NOT USE_EXISTING_SRC_DIR)
      set(${name} ${value} CACHE STRING "")
    endif()
  elseif(name MATCHES "^.*SHA256$")
    set(${name} ${value})
  endif()

endforeach()

if(USE_BUNDLED_UNIBILIUM)
  include(BuildUnibilium)
endif()

if(USE_BUNDLED_LIBTERMKEY)
  include(BuildLibtermkey)
  if(USE_BUNDLED_UNIBILIUM)
    add_dependencies(libtermkey unibilium)
  endif()
endif()

if(USE_BUNDLED_LIBVTERM)
  include(BuildLibvterm)
endif()

if(USE_BUNDLED_LIBUV)
  include(BuildLibuv)
endif()

if(USE_BUNDLED_MSGPACK)
  include(BuildMsgpack)
endif()

if(USE_BUNDLED_LUAJIT)
  include(BuildLuajit)
endif()

if(USE_BUNDLED_LUA)
  include(BuildLua)
endif()

if(USE_BUNDLED_LUAROCKS)
  include(BuildLuarocks)
endif()

if(USE_BUNDLED_LUV)
  include(BuildLuv)
endif()

if(USE_BUNDLED_LPEG)
  include(BuildLpeg)
endif()

if(USE_BUNDLED_GETTEXT)
  include(BuildGettext)
endif()

if(USE_BUNDLED_LIBICONV)
  include(BuildLibiconv)
endif()

if(USE_BUNDLED_TS_PARSERS)
  include(BuildTreesitterParsers)
endif()

if(USE_BUNDLED_TS)
  include(BuildTreesitter)
endif()

if(WIN32)
  include(GetBinaryDeps)

  GetExecutable(TARGET cat)
  GetExecutable(TARGET tee)
  GetExecutable(TARGET xxd)

  if(USE_BUNDLED_NVIMQT)
    GetBinaryDep(TARGET wingui
      INSTALL_COMMAND ${CMAKE_COMMAND} -E copy_directory bin ${DEPS_BIN_DIR}
      COMMAND ${CMAKE_COMMAND} -E copy_directory share ${DEPS_INSTALL_DIR}/share)
  endif()

  GetBinaryDep(TARGET win32yank_X86_64
    INSTALL_COMMAND ${CMAKE_COMMAND} -E copy win32yank.exe ${DEPS_BIN_DIR})
endif()