# On non-Darwin require UUID.
if(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
  set(UUID_INCLUDE "")
  set(UUID_LIBRARIES "")
elseif(CMAKE_SYSTEM_NAME STREQUAL "Windows")
  set(UUID_INCLUDE "")
  set(UUID_LIBRARIES "ole32.lib")
else()
  find_package(UUID REQUIRED)
  set(UUID_INCLUDE "-I${UUID_INCLUDE_DIRS}")
endif()

# Figure out if we can track VC revisions.
# FIXME: Copied from Clang.
function(find_first_existing_file out_var)
  foreach(file ${ARGN})
    if(EXISTS "${file}")
      set(${out_var} "${file}" PARENT_SCOPE)
      return()
    endif()
  endforeach()
endfunction()

macro(find_first_existing_vc_file out_var path)
  find_first_existing_file(${out_var}
    "${path}/.git/logs/HEAD" # Git
    "${path}/.svn/wc.db"     # SVN 1.7
    "${path}/.svn/entries"   # SVN 1.6
    )
endmacro()

set(get_svn_script "${LLVM_MAIN_SRC_DIR}/cmake/modules/GetSVN.cmake")

function(generate_revision_inc revision_inc_var name dir)
  find_first_existing_vc_file(dep_file "${dir}")
  # Create custom target to generate the VC revision include.
  set(revision_inc "${CMAKE_CURRENT_BINARY_DIR}/${name}Revision.inc")
  string(TOUPPER ${name} upper_name)
  if(DEFINED dep_file)
    add_custom_command(OUTPUT "${revision_inc}"
      DEPENDS "${dep_file}" "${get_svn_script}"
      COMMAND
      ${CMAKE_COMMAND} "-DFIRST_SOURCE_DIR=${dir}"
                       "-DFIRST_NAME=${upper_name}"
                       "-DHEADER_FILE=${revision_inc}"
                       -P "${get_svn_script}")
  else()
    # Generate an empty Revision.inc file if we are not using git or SVN.
    file(WRITE "${revision_inc}" "")
  endif()

  # Mark the generated header as being generated.
  set_source_files_properties("${revision_inc}"
    PROPERTIES GENERATED TRUE
               HEADER_FILE_ONLY TRUE)
  set(${revision_inc_var} ${revision_inc} PARENT_SCOPE)
endfunction()

generate_revision_inc(llvm_revision_inc LLVM "${LLVM_MAIN_SRC_DIR}")
generate_revision_inc(clang_revision_inc Clang "${CLANG_MAIN_SRC_DIR}")
generate_revision_inc(swift_revision_inc Swift "${SWIFT_SOURCE_DIR}")

set(version_inc_files
  ${llvm_revision_inc} ${clang_revision_inc} ${swift_revision_inc})

add_swift_library(swiftBasic STATIC
  Cache.cpp
  ClusteredBitVector.cpp
  DiverseStack.cpp
  Edit.cpp
  EditorPlaceholder.cpp
  FileSystem.cpp
  JSONSerialization.cpp
  LangOptions.cpp
  LLVMContext.cpp
  Mangler.cpp
  Platform.cpp
  PrefixMap.cpp
  PrettyStackTrace.cpp
  PrimitiveParsing.cpp
  Program.cpp
  QuotedString.cpp
  SourceLoc.cpp
  Statistic.cpp
  StringExtras.cpp
  TaskQueue.cpp
  ThreadSafeRefCounted.cpp
  Timer.cpp
  Unicode.cpp
  UUID.cpp
  Version.cpp
  ${version_inc_files}

  # Platform-specific TaskQueue implementations
  Unix/TaskQueue.inc

  # Platform-agnostic fallback TaskQueue implementation
  Default/TaskQueue.inc

  UnicodeExtendedGraphemeClusters.cpp.gyb

  C_COMPILE_FLAGS ${UUID_INCLUDE}
  LINK_LIBRARIES
    swiftDemangling
    ${UUID_LIBRARIES}
  LLVM_COMPONENT_DEPENDS support)

message(STATUS "Swift version: ${SWIFT_VERSION}")
message(STATUS "Swift vendor: ${SWIFT_VENDOR}")

string(REGEX REPLACE "([0-9]+)\\.[0-9]+(\\.[0-9]+)?" "\\1" SWIFT_VERSION_MAJOR
  ${SWIFT_VERSION})
string(REGEX REPLACE "[0-9]+\\.([0-9]+)(\\.[0-9]+)?" "\\1" SWIFT_VERSION_MINOR
  ${SWIFT_VERSION})

set_property(SOURCE Version.cpp APPEND_STRING PROPERTY COMPILE_FLAGS
  " -DSWIFT_VERSION=${SWIFT_VERSION} -DSWIFT_VERSION_MAJOR=${SWIFT_VERSION_MAJOR} -DSWIFT_VERSION_MINOR=${SWIFT_VERSION_MINOR}")

if ("${SWIFT_VERSION}" MATCHES "[0-9]+\\.[0-9]+\\.[0-9]+")
  string(REGEX REPLACE "[0-9]+\\.[0-9]+\\.([0-9]+)" "\\1" SWIFT_VERSION_PATCHLEVEL
    ${SWIFT_VERSION})
  set_property(SOURCE Version.cpp APPEND_STRING PROPERTY COMPILE_FLAGS
    " -DSWIFT_HAS_VERSION_PATCHLEVEL=1 -DSWIFT_VERSION_PATCHLEVEL=${SWIFT_VERSION_PATCHLEVEL}")
else()
  set_property(SOURCE Version.cpp APPEND_STRING PROPERTY COMPILE_FLAGS
    " -DSWIFT_HAS_VERSION_PATCHLEVEL=0")
endif()

if(NOT "${SWIFT_VENDOR}" STREQUAL "")
  set_property(SOURCE Version.cpp APPEND_STRING PROPERTY COMPILE_FLAGS
      " -DSWIFT_VENDOR=\"\\\"${SWIFT_VENDOR}\\\"\"")
endif()

set(SWIFT_COMPILER_VERSION "" CACHE STRING
    "The string that identifies the SCM commit(s) for this build")

message(STATUS "Swift compiler version: ${SWIFT_COMPILER_VERSION}")
message(STATUS "Embedded clang compiler version: ${CLANG_COMPILER_VERSION}")

if(SWIFT_COMPILER_VERSION)
  set_property(SOURCE Version.cpp APPEND_STRING PROPERTY COMPILE_FLAGS
    " -DSWIFT_COMPILER_VERSION=\"\\\"${SWIFT_COMPILER_VERSION}\\\"\"")
endif()

if(CLANG_COMPILER_VERSION)
  set_property(SOURCE Version.cpp APPEND_STRING PROPERTY COMPILE_FLAGS
    " -DCLANG_COMPILER_VERSION=\"\\\"${CLANG_COMPILER_VERSION}\\\"\"")
endif()