message(STATUS "LLDB.framework: build path is '${LLDB_FRAMEWORK_ABSOLUTE_BUILD_DIR}'")
message(STATUS "LLDB.framework: install path is '${LLDB_FRAMEWORK_INSTALL_DIR}'")
message(STATUS "LLDB.framework: resources subdirectory is 'Versions/${LLDB_FRAMEWORK_VERSION}/Resources'")

# Configure liblldb as a framework bundle
if(NOT APPLE_EMBEDDED)
  set_target_properties(liblldb PROPERTIES
    FRAMEWORK ON
    FRAMEWORK_VERSION ${LLDB_FRAMEWORK_VERSION}

    OUTPUT_NAME LLDB
    VERSION ${LLDB_VERSION}
    LIBRARY_OUTPUT_DIRECTORY ${LLDB_FRAMEWORK_ABSOLUTE_BUILD_DIR}

    # Compatibility version
    SOVERSION "1.0.0"

    MACOSX_FRAMEWORK_IDENTIFIER com.apple.LLDB.framework
    MACOSX_FRAMEWORK_BUNDLE_VERSION ${LLDB_VERSION}
    MACOSX_FRAMEWORK_SHORT_VERSION_STRING ${LLDB_VERSION}
    MACOSX_FRAMEWORK_INFO_PLIST ${LLDB_SOURCE_DIR}/resources/LLDB-Info.plist.in
  )
else()
  set_target_properties(liblldb PROPERTIES
    FRAMEWORK ON
    FRAMEWORK_VERSION ${LLDB_FRAMEWORK_VERSION}

    # Note: iOS doesn't specify version, as the framework layout is flat.
    OUTPUT_NAME LLDB
    LIBRARY_OUTPUT_DIRECTORY ${LLDB_FRAMEWORK_ABSOLUTE_BUILD_DIR}

    MACOSX_FRAMEWORK_IDENTIFIER com.apple.LLDB.framework
    MACOSX_FRAMEWORK_BUNDLE_VERSION ${LLDB_VERSION}
    MACOSX_FRAMEWORK_SHORT_VERSION_STRING ${LLDB_VERSION}
    MACOSX_FRAMEWORK_INFO_PLIST ${LLDB_SOURCE_DIR}/resources/LLDB-Info.plist.in
  )
endif()

# Used in llvm_add_library() to set default output directories for multi-config
# generators. Overwrite to account for special framework output directory.
set_output_directory(liblldb
  BINARY_DIR ${LLDB_FRAMEWORK_ABSOLUTE_BUILD_DIR}
  LIBRARY_DIR ${LLDB_FRAMEWORK_ABSOLUTE_BUILD_DIR}
)

lldb_add_post_install_steps_darwin(liblldb ${LLDB_FRAMEWORK_INSTALL_DIR})

# Affects the layout of the framework bundle (default is macOS layout).
if(APPLE_EMBEDDED)
  set_target_properties(liblldb PROPERTIES
    XCODE_ATTRIBUTE_IPHONEOS_DEPLOYMENT_TARGET "${IPHONEOS_DEPLOYMENT_TARGET}")
else()
  set_target_properties(liblldb PROPERTIES
    XCODE_ATTRIBUTE_MACOSX_DEPLOYMENT_TARGET "${MACOSX_DEPLOYMENT_TARGET}")
endif()

# Add -Wdocumentation parameter
set(CMAKE_XCODE_ATTRIBUTE_CLANG_WARN_DOCUMENTATION_COMMENTS "YES")

# On iOS, there is no versioned framework layout. Skip this symlink step.
if(NOT APPLE_EMBEDDED)
  # Apart from this one, CMake creates all required symlinks in the framework bundle.
  add_custom_command(TARGET liblldb POST_BUILD
    COMMAND ${CMAKE_COMMAND} -E create_symlink
            Versions/Current/Headers
            ${LLDB_FRAMEWORK_ABSOLUTE_BUILD_DIR}/LLDB.framework/Headers
    COMMENT "LLDB.framework: create Headers symlink"
  )
endif()

# At configuration time, collect headers for the framework bundle and copy them
# into a staging directory. Later we can copy over the entire folder.
file(GLOB public_headers ${LLDB_SOURCE_DIR}/include/lldb/API/*.h)
set(generated_public_headers ${LLDB_OBJ_DIR}/include/lldb/API/SBLanguages.h)
file(GLOB root_public_headers ${LLDB_SOURCE_DIR}/include/lldb/lldb-*.h)
file(GLOB root_private_headers ${LLDB_SOURCE_DIR}/include/lldb/lldb-private*.h)
list(REMOVE_ITEM root_public_headers ${root_private_headers})

find_program(unifdef_EXECUTABLE unifdef)

set(lldb_header_staging ${CMAKE_CURRENT_BINARY_DIR}/FrameworkHeaders)
foreach(header
    ${public_headers}
    ${generated_public_headers}
    ${root_public_headers})

  get_filename_component(basename ${header} NAME)
  set(staged_header ${lldb_header_staging}/${basename})

  if(unifdef_EXECUTABLE)
    # unifdef returns 0 when the file is unchanged and 1 if something was changed.
    # That means if we successfully remove SWIG code, the build system believes
    # that the command has failed and stops. This is undesirable.
    set(copy_command ${unifdef_EXECUTABLE} -USWIG -o ${staged_header} ${header} || (exit 0))
  else()
    set(copy_command ${CMAKE_COMMAND} -E copy ${header} ${staged_header})
  endif()

  add_custom_command(
    DEPENDS ${header} OUTPUT ${staged_header}
    COMMAND ${copy_command}
    COMMENT "LLDB.framework: collect framework header and remove SWIG macros")

  list(APPEND lldb_staged_headers ${staged_header})
endforeach()

# Wrap output in a target, so lldb-framework can depend on it.
add_custom_target(liblldb-resource-headers DEPENDS lldb-sbapi-dwarf-enums ${lldb_staged_headers})
set_target_properties(liblldb-resource-headers PROPERTIES FOLDER "LLDB/Resources")
add_dependencies(liblldb liblldb-resource-headers)

# At build time, copy the staged headers into the framework bundle (and do
# some post-processing in-place).
add_custom_command(TARGET liblldb POST_BUILD
  COMMAND ${CMAKE_COMMAND} -E copy_directory ${lldb_header_staging} $<TARGET_FILE_DIR:liblldb>/Headers
  COMMAND ${LLDB_SOURCE_DIR}/scripts/framework-header-fix.sh $<TARGET_FILE_DIR:liblldb>/Headers ${LLDB_VERSION}
  COMMENT "LLDB.framework: copy framework headers"
)

# Copy vendor-specific headers from clang (without staging).
if(NOT APPLE_EMBEDDED)
  if (TARGET clang-resource-headers)
    add_dependencies(liblldb clang-resource-headers)
    set(clang_resource_headers_dir $<TARGET_PROPERTY:clang-resource-headers,INTERFACE_INCLUDE_DIRECTORIES>)
  else()
    set(clang_resource_headers_dir ${LLDB_EXTERNAL_CLANG_RESOURCE_DIR}/include)
    if(NOT EXISTS ${clang_resource_headers_dir})
      message(WARNING "Expected directory for clang-resource headers not found: ${clang_resource_headers_dir}")
    endif()
  endif()

  add_custom_command(TARGET liblldb POST_BUILD
    COMMAND ${CMAKE_COMMAND} -E copy_directory
            ${clang_resource_headers_dir}
            $<TARGET_FILE_DIR:liblldb>/Resources/Clang/include
    COMMENT "LLDB.framework: copy clang vendor-specific headers"
  )
endif()

# Add an rpath pointing to the directory where LLDB.framework is installed.
# This allows frameworks (relying on @rpath) to be installed in the same folder and found at runtime.
set_property(TARGET liblldb APPEND PROPERTY INSTALL_RPATH
  "@loader_path/../../../")