# Copyright 2016 The Cartographer Authors
#
# 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.

cmake_minimum_required(VERSION 2.8.12)  # Ships with Ubuntu 14.04 (Trusty)

project(cartographer)

set(CARTOGRAPHER_MAJOR_VERSION 1)
set(CARTOGRAPHER_MINOR_VERSION 0)
set(CARTOGRAPHER_PATCH_VERSION 0)
set(CARTOGRAPHER_VERSION ${CARTOGRAPHER_MAJOR_VERSION}.${CARTOGRAPHER_MINOR_VERSION}.${CARTOGRAPHER_PATCH_VERSION})
set(CARTOGRAPHER_SOVERSION ${CARTOGRAPHER_MAJOR_VERSION}.${CARTOGRAPHER_MINOR_VERSION})
option(BUILD_GRPC "build Cartographer gRPC support" false)
# TODO(gaschler): Make this an option.
set(GRPC_PLUGIN_PATH "/usr/local/bin/grpc_cpp_plugin")

include("${PROJECT_SOURCE_DIR}/cmake/functions.cmake")
google_initialize_cartographer_project()
google_enable_testing()

find_package(Boost REQUIRED COMPONENTS iostreams)
find_package(Ceres REQUIRED COMPONENTS SparseLinearAlgebraLibrary)
find_package(Eigen3 REQUIRED)
find_package(LuaGoogle REQUIRED)
find_package(Protobuf 3.0.0 REQUIRED)

include(FindPkgConfig)
PKG_SEARCH_MODULE(CAIRO REQUIRED cairo>=1.12.16)

# Only build the documentation if we can find Sphinx.
find_package(Sphinx)
if(SPHINX_FOUND)
  add_subdirectory("docs")
endif()

# Install catkin package.xml
install(FILES package.xml DESTINATION share/cartographer)

set(CARTOGRAPHER_CONFIGURATION_FILES_DIRECTORY ${CMAKE_INSTALL_PREFIX}/share/cartographer/configuration_files
  CACHE PATH ".lua configuration files directory")

install(DIRECTORY configuration_files DESTINATION share/cartographer/)

install(DIRECTORY cmake DESTINATION share/cartographer/)

file(GLOB_RECURSE ALL_LIBRARY_HDRS "*.h")
file(GLOB_RECURSE ALL_LIBRARY_SRCS "*.cc")
file(GLOB_RECURSE ALL_TESTS "*_test.cc")
file(GLOB_RECURSE ALL_EXECUTABLES "*_main.cc")
list(REMOVE_ITEM ALL_LIBRARY_SRCS ${ALL_TESTS})
list(REMOVE_ITEM ALL_LIBRARY_SRCS ${ALL_EXECUTABLES})
file(GLOB_RECURSE ALL_GRPC_FILES "cartographer_grpc/*")
if (NOT ${BUILD_GRPC})
  list(REMOVE_ITEM ALL_LIBRARY_HDRS ${ALL_GRPC_FILES})
  list(REMOVE_ITEM ALL_LIBRARY_SRCS ${ALL_GRPC_FILES})
  list(REMOVE_ITEM ALL_TESTS ${ALL_GRPC_FILES})
  list(REMOVE_ITEM ALL_EXECUTABLES ${ALL_GRPC_FILES})
endif()
set(INSTALL_SOURCE_HDRS ${ALL_LIBRARY_HDRS})
file(GLOB_RECURSE INTERNAL_HDRS "cartographer/internal/*.h"
  "cartographer_grpc/internal/*.h")
list(REMOVE_ITEM INSTALL_SOURCE_HDRS ${INTERNAL_HDRS})

file(GLOB_RECURSE ALL_PROTOS "*.proto")
file(GLOB_RECURSE ALL_GRPC_SERVICES "*_service.proto")
list(REMOVE_ITEM ALL_PROTOS ALL_GRPC_SERVICES)
if (NOT ${BUILD_GRPC})
  list(REMOVE_ITEM ALL_PROTOS ${ALL_GRPC_FILES})
endif()

# TODO(cschuet): Move proto compilation to separate function.
set(ALL_PROTO_SRCS)
set(ALL_PROTO_HDRS)
foreach(ABS_FIL ${ALL_PROTOS})
  file(RELATIVE_PATH REL_FIL ${PROJECT_SOURCE_DIR} ${ABS_FIL})
  get_filename_component(DIR ${REL_FIL} DIRECTORY)
  get_filename_component(FIL_WE ${REL_FIL} NAME_WE)

  list(APPEND ALL_PROTO_SRCS "${PROJECT_BINARY_DIR}/${DIR}/${FIL_WE}.pb.cc")
  list(APPEND ALL_PROTO_HDRS "${PROJECT_BINARY_DIR}/${DIR}/${FIL_WE}.pb.h")

  add_custom_command(
    OUTPUT "${PROJECT_BINARY_DIR}/${DIR}/${FIL_WE}.pb.cc"
           "${PROJECT_BINARY_DIR}/${DIR}/${FIL_WE}.pb.h"
    COMMAND  ${PROTOBUF_PROTOC_EXECUTABLE}
    ARGS --cpp_out  ${PROJECT_BINARY_DIR} -I
      ${PROJECT_SOURCE_DIR} ${ABS_FIL}
    DEPENDS ${ABS_FIL}
    COMMENT "Running C++ protocol buffer compiler on ${ABS_FIL}"
    VERBATIM
  )
endforeach()
set_source_files_properties(${ALL_PROTO_SRCS} ${ALL_PROTO_HDRS} PROPERTIES GENERATED TRUE)
list(APPEND ALL_LIBRARY_HDRS ${ALL_PROTO_HDRS})
list(APPEND ALL_LIBRARY_SRCS ${ALL_PROTO_SRCS})

if(${BUILD_GRPC})
  set(ALL_GRPC_SERVICE_SRCS)
  set(ALL_GRPC_SERVICE_HDRS)
  foreach(ABS_FIL ${ALL_GRPC_SERVICES})
    file(RELATIVE_PATH REL_FIL ${PROJECT_SOURCE_DIR} ${ABS_FIL})
    get_filename_component(DIR ${REL_FIL} DIRECTORY)
    get_filename_component(FIL_WE ${REL_FIL} NAME_WE)

    list(APPEND ALL_GRPC_SERVICE_SRCS "${PROJECT_BINARY_DIR}/${DIR}/${FIL_WE}.pb.cc")
    list(APPEND ALL_GRPC_SERVICE_HDRS "${PROJECT_BINARY_DIR}/${DIR}/${FIL_WE}.pb.h")
    list(APPEND ALL_GRPC_SERVICE_SRCS "${PROJECT_BINARY_DIR}/${DIR}/${FIL_WE}.grpc.pb.cc")
    list(APPEND ALL_GRPC_SERVICE_HDRS "${PROJECT_BINARY_DIR}/${DIR}/${FIL_WE}.grpc.pb.h")

    add_custom_command(
      OUTPUT "${PROJECT_BINARY_DIR}/${DIR}/${FIL_WE}.grpc.pb.cc"
             "${PROJECT_BINARY_DIR}/${DIR}/${FIL_WE}.grpc.pb.h"
      COMMAND  ${PROTOBUF_PROTOC_EXECUTABLE}
      ARGS --grpc_out  ${PROJECT_BINARY_DIR}
        --cpp_out  ${PROJECT_BINARY_DIR}
        -I ${PROJECT_SOURCE_DIR}
        --plugin=protoc-gen-grpc=${GRPC_PLUGIN_PATH}
        ${ABS_FIL}
      DEPENDS ${ABS_FIL}
      COMMENT "Running C++ protocol buffer compiler with gRPC support on ${ABS_FIL}"
      VERBATIM
    )
  endforeach()
  set_source_files_properties(${ALL_GRPC_SERVICE_SRCS} ${ALL_GRPC_SERVICE_HDRS} PROPERTIES GENERATED TRUE)
  list(APPEND ALL_LIBRARY_HDRS ${ALL_GRPC_SERVICE_HDRS})
  list(APPEND ALL_LIBRARY_SRCS ${ALL_GRPC_SERVICE_SRCS})
endif()
set(INSTALL_GENERATED_HDRS ${ALL_PROTO_HDRS} ${ALL_GRPC_SERVICE_HDRS})

add_library(${PROJECT_NAME} ${ALL_LIBRARY_HDRS} ${ALL_LIBRARY_SRCS})

configure_file(
  ${PROJECT_SOURCE_DIR}/cartographer/common/config.h.cmake
  ${PROJECT_BINARY_DIR}/cartographer/common/config.h)

google_binary(cartographer_autogenerate_ground_truth
  SRCS
    cartographer/ground_truth/autogenerate_ground_truth_main.cc
)

google_binary(cartographer_compute_relations_metrics
  SRCS
    cartographer/ground_truth/compute_relations_metrics_main.cc
)

if(${BUILD_GRPC})
  google_binary(cartographer_grpc_server
    SRCS
      cartographer_grpc/map_builder_server_main.cc
  )
endif()

foreach(ABS_FIL ${ALL_TESTS})
  file(RELATIVE_PATH REL_FIL ${PROJECT_SOURCE_DIR} ${ABS_FIL})
  get_filename_component(DIR ${REL_FIL} DIRECTORY)
  get_filename_component(FIL_WE ${REL_FIL} NAME_WE)
  # Replace slashes as required for CMP0037.
  string(REPLACE "/" "." TEST_TARGET_NAME "${DIR}/${FIL_WE}")
  google_test("${TEST_TARGET_NAME}" ${ABS_FIL})
  if(${BUILD_GRPC})
    target_link_libraries("${TEST_TARGET_NAME}" PUBLIC grpc++)
  endif()
endforeach()

target_include_directories(${PROJECT_NAME} SYSTEM PUBLIC
  "${EIGEN3_INCLUDE_DIR}")
target_link_libraries(${PROJECT_NAME} PUBLIC ${EIGEN3_LIBRARIES})

target_include_directories(${PROJECT_NAME} SYSTEM PUBLIC
  "${CERES_INCLUDE_DIRS}")
target_link_libraries(${PROJECT_NAME} PUBLIC ${CERES_LIBRARIES})

target_include_directories(${PROJECT_NAME} SYSTEM PUBLIC
  "${LUA_INCLUDE_DIR}")
target_link_libraries(${PROJECT_NAME} PUBLIC ${LUA_LIBRARIES})

target_include_directories(${PROJECT_NAME} SYSTEM PUBLIC
  "${Boost_INCLUDE_DIRS}")
target_link_libraries(${PROJECT_NAME} PUBLIC ${Boost_LIBRARIES})

# We expect find_package(Ceres) to have located these for us.
target_link_libraries(${PROJECT_NAME} PUBLIC glog)
target_link_libraries(${PROJECT_NAME} PUBLIC gflags)

target_include_directories(${PROJECT_NAME} SYSTEM PUBLIC
  "${CAIRO_INCLUDE_DIRS}")
target_link_libraries(${PROJECT_NAME} PUBLIC ${CAIRO_LIBRARIES})

target_include_directories(${PROJECT_NAME} SYSTEM PUBLIC
  ${PROTOBUF_INCLUDE_DIR})
# TODO(hrapp): This should not explicitly list pthread and use
# PROTOBUF_LIBRARIES, but that failed on first try.
target_link_libraries(${PROJECT_NAME} PUBLIC ${PROTOBUF_LIBRARY} pthread)
if(${BUILD_GRPC})
  target_link_libraries(${PROJECT_NAME} PUBLIC grpc++)
endif()

# Add the binary directory first, so that port.h is included after it has
# been generated.
target_include_directories(${PROJECT_NAME} PUBLIC
    $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}>
    $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}>
    $<INSTALL_INTERFACE:include>
)

# TODO(damonkohler): Create a testing library.
target_include_directories(${PROJECT_NAME} SYSTEM PRIVATE
  "${GMOCK_INCLUDE_DIRS}")
target_link_libraries(${PROJECT_NAME} PUBLIC ${GMOCK_LIBRARY})

set(TARGET_COMPILE_FLAGS "${TARGET_COMPILE_FLAGS} ${GOOG_CXX_FLAGS}")
set_target_properties(${PROJECT_NAME} PROPERTIES
  COMPILE_FLAGS ${TARGET_COMPILE_FLAGS})

install(
  TARGETS ${PROJECT_NAME}
  EXPORT CartographerExport
  ARCHIVE DESTINATION lib
  LIBRARY DESTINATION lib
  RUNTIME DESTINATION bin
)

foreach(HDR ${INSTALL_SOURCE_HDRS})
  file(RELATIVE_PATH REL_FIL ${PROJECT_SOURCE_DIR} ${HDR})
  get_filename_component(DIR ${REL_FIL} DIRECTORY)
  install(
    FILES ${HDR}
    DESTINATION include/${DIR}
  )
endforeach()

foreach(HDR ${INSTALL_GENERATED_HDRS})
  file(RELATIVE_PATH REL_FIL ${PROJECT_BINARY_DIR} ${HDR})
  get_filename_component(DIR ${REL_FIL} DIRECTORY)
  install(
    FILES ${HDR}
    DESTINATION include/${DIR}
  )
endforeach()

set(CARTOGRAPHER_CMAKE_DIR share/cartographer/cmake)
include(CMakePackageConfigHelpers)
configure_package_config_file(
  cartographer-config.cmake.in
  ${PROJECT_BINARY_DIR}/cmake/cartographer/cartographer-config.cmake
  PATH_VARS CARTOGRAPHER_CMAKE_DIR
  INSTALL_DESTINATION ${CMAKE_INSTALL_PREFIX}/share/cartographer
)

install(
  EXPORT CartographerExport
  DESTINATION share/cartographer/cmake/
  FILE CartographerTargets.cmake
)

install(
  FILES ${PROJECT_BINARY_DIR}/cmake/cartographer/cartographer-config.cmake
  DESTINATION share/cartographer/
)