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-# ~~~
-# Copyright 2019 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-# ~~~
-
-#[=======================================================================[.rst:
-FindProtobufTargets
--------------------
-
-A module to use `Protobuf` with less complications.
-
-Using ``find_package(Protobuf)`` should be simple, but it is not.
-
-CMake provides a ``FindProtobuf`` module. Unfortunately it does not generate
-`protobuf::*` targets until CMake-3.9, and `protobuf::protoc` does not
-appear until CMake-3.10.
-
-The CMake-config files generated by `protobuf` always create these targets,
-but on some Linux distributions (e.g. Fedora>=29, and openSUSE-Tumbleweed) there
-are system packages for protobuf, but these packages are installed without the
-CMake-config files. One must either use the ``FindProtobuf`` module, find the
-libraries via `pkg-config`, or find the libraries manually.
-
-When the CMake-config files are installed they produce the same targets as
-recent versions of ``FindProtobuf``. However, they do not produce the
-`Protobuf_LIBRARY`, `Protobuf_INCLUDE_DIR`, etc. that are generated by the
-module. Furthermore, the `protobuf::protoc` library is not usable when loaded
-from the CMake-config files: its ``IMPORTED_LOCATION`` variable is not defined.
-
-This module is designed to provide a single, uniform, ``find_package()``
-module that always produces the same outputs:
-
-- It always generates the ``protobuf::*`` targets.
-- It always defines ``ProtobufTargets_FOUND`` and ``ProtobufTargets_VERSION``.
-- It *prefers* using the CMake config files if they are available.
-- It fallsback on the ``FindProtobuf`` module if the config files are not found.
-- It populates any missing targets and their properties.
-
-The following :prop_tgt:`IMPORTED` targets are defined:
-
-``protobuf::libprotobuf``
-  The protobuf library.
-``protobuf::libprotobuf-lite``
-  The protobuf lite library.
-``protobuf::libprotoc``
-  The protoc library.
-``protobuf::protoc``
-  The protoc compiler.
-
-Example:
-
-.. code-block:: cmake
-
-  find_package(ProtobufTargets REQUIRED)
-  add_executable(bar bar.cc)
-  target_link_libraries(bar PRIVATE protobuf::libprotobuf)
-
-#]=======================================================================]
-
-if (protobuf_DEBUG)
-    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
-                   "protobuf_USE_STATIC_LIBS = ${protobuf_USE_STATIC_LIBS}"
-                   " ProtobufTargets = ${ProtobufTargets_FOUND}")
-endif ()
-
-# Always load thread support, even on Windows.
-find_package(Threads REQUIRED)
-
-# First try to use the ``protobufConfig.cmake`` or ``protobuf-config.cmake``
-# file if it was installed. This is common on systems (or package managers)
-# where protobuf was compiled and installed with `CMake`. Note that on Linux
-# this *must* be all lowercase ``protobuf``, while on Windows it does not
-# matter.
-find_package(protobuf CONFIG)
-
-if (protobuf_DEBUG)
-    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
-                   "protobuf_FOUND = ${protobuf_FOUND}"
-                   " protobuf_VERSION = ${protobuf_VERSION}")
-endif ()
-
-if (protobuf_FOUND)
-    set(ProtobufTargets_FOUND 1)
-    set(ProtobufTargets_VERSION ${protobuf_VERSION})
-    if (protobuf_DEBUG)
-        message(
-            STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
-                   "ProtobufTargets_FOUND = ${ProtobufTargets_FOUND}"
-                   " ProtobufTargets_VERSION = ${ProtobufTargets_VERSION}")
-    endif ()
-else ()
-    find_package(Protobuf QUIET)
-    if (Protobuf_FOUND)
-        set(ProtobufTargets_FOUND 1)
-        set(ProtobufTargets_VERSION ${Protobuf_VERSION})
-
-        if (NOT TARGET protobuf::libprotobuf)
-            add_library(protobuf::libprotobuf IMPORTED INTERFACE)
-            set_property(
-                TARGET protobuf::libprotobuf
-                PROPERTY INTERFACE_INCLUDE_DIRECTORIES ${Protobuf_INCLUDE_DIR})
-            set_property(
-                TARGET protobuf::libprotobuf APPEND
-                PROPERTY INTERFACE_LINK_LIBRARIES ${Protobuf_LIBRARY}
-                         Threads::Threads)
-        endif ()
-
-        if (NOT TARGET protobuf::libprotobuf-lite)
-            add_library(protobuf::libprotobuf-lite IMPORTED INTERFACE)
-            set_property(
-                TARGET protobuf::libprotobuf-lite
-                PROPERTY INTERFACE_INCLUDE_DIRECTORIES ${Protobuf_INCLUDE_DIR})
-            set_property(
-                TARGET protobuf::libprotobuf-lite APPEND
-                PROPERTY INTERFACE_LINK_LIBRARIES ${Protobuf_LITE_LIBRARY}
-                         Threads::Threads)
-        endif ()
-
-        if (NOT TARGET protobuf::libprotoc)
-            add_library(protobuf::libprotoc IMPORTED INTERFACE)
-            set_property(
-                TARGET protobuf::libprotoc
-                PROPERTY INTERFACE_INCLUDE_DIRECTORIES ${Protobuf_INCLUDE_DIR})
-            set_property(
-                TARGET protobuf::libprotoc APPEND
-                PROPERTY INTERFACE_LINK_LIBRARIES ${Protobuf_PROTOC_LIBRARY}
-                         Threads::Threads)
-        endif ()
-    endif ()
-endif ()
-
-if (protobuf_DEBUG)
-    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
-                   "ProtobufTargets_FOUND = ${ProtobufTargets_FOUND}"
-                   " ProtobufTargets_VERSION = ${ProtobufTargets_VERSION}")
-endif ()
-
-# We also should try to find the protobuf C++ plugin for the protocol buffers
-# compiler.
-if (ProtobufTargets_FOUND AND NOT TARGET protobuf::protoc)
-    add_executable(protobuf::protoc IMPORTED)
-
-    # Discover the protoc compiler location.
-    find_program(
-        _protobuf_PROTOC_EXECUTABLE
-        NAMES protoc
-        DOC "The Google Protocol Buffers Compiler")
-    if (protobuf_DEBUG)
-        message(
-            STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
-                   "ProtobufTargets_FOUND = ${ProtobufTargets_FOUND}"
-                   " ProtobufTargets_VERSION = ${ProtobufTargets_VERSION}"
-                   " EXE = ${_protobuf_PROTOC_EXECUTABLE}")
-    endif ()
-    set_property(TARGET protobuf::protoc
-                 PROPERTY IMPORTED_LOCATION ${_protobuf_PROTOC_EXECUTABLE})
-    set_property(
-        TARGET protobuf::protoc PROPERTY IMPORTED_LOCATION_DEBUG
-                                         ${_protobuf_PROTOC_EXECUTABLE})
-    set_property(
-        TARGET protobuf::protoc PROPERTY IMPORTED_LOCATION_RELEASE
-                                         ${_protobuf_PROTOC_EXECUTABLE})
-    unset(_protobuf_PROTOC_EXECUTABLE)
-
-    if (protobuf_DEBUG)
-        get_target_property(_protobuf_PROTOC_EXECUTABLE protobuf::protoc
-                            IMPORTED_LOCATION)
-        message(
-            STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
-                   "LOCATION=${_protobuf_PROTOC_EXECUTABLE}")
-    endif ()
-endif ()
-
-if (protobuf_DEBUG)
-    message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
-                   "ProtobufTargets_FOUND = ${ProtobufTargets_FOUND}"
-                   " ProtobufTargets_VERSION = ${ProtobufTargets_VERSION}")
-    if (ProtobufTargets_FOUND)
-        foreach (_target protobuf::libprotobuf protobuf::libprotobuf-lite
-                         protobuf::libprotoc)
-            if (NOT TARGET ${_target})
-                message(
-                    STATUS
-                        "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] "
-                        "target=${_target} is NOT a target")
-            endif ()
-        endforeach ()
-        unset(_target)
-    endif ()
-endif ()
-
-find_package_handle_standard_args(ProtobufTargets REQUIRED_VARS
-                                  ProtobufTargets_FOUND ProtobufTargets_VERSION)