external_rules.cmake

# Copyright 2018 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.

function(download_external_sources)
 file(MAKE_DIRECTORY ${PROJECT_BINARY_DIR}/external)

 set(DOWNLOAD_BENCHMARK ${FIREBASE_IOS_BUILD_BENCHMARKS})
 set(DOWNLOAD_GOOGLETEST ${FIREBASE_IOS_BUILD_TESTS})

 execute_process(
COMMAND
${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}"
 -DFIREBASE_DOWNLOAD_DIR=${FIREBASE_DOWNLOAD_DIR}
 -DCMAKE_INSTALL_PREFIX=${FIREBASE_INSTALL_DIR}
 -DFUZZING=${FUZZING}
 -DDOWNLOAD_BENCHMARK=${DOWNLOAD_BENCHMARK}
 -DDOWNLOAD_GOOGLETEST=${DOWNLOAD_GOOGLETEST}
${PROJECT_SOURCE_DIR}/cmake/external
WORKING_DIRECTORY${PROJECT_BINARY_DIR}/external
 )

# Run downloads in parallel if we know how
 if(CMAKE_GENERATORSTREQUAL"Unix Makefiles")
 set(cmake_build_args -j)
 endif()

 execute_process(
COMMAND${CMAKE_COMMAND} --build . -- ${cmake_build_args}
WORKING_DIRECTORY${PROJECT_BINARY_DIR}/external
 )
endfunction()

function(add_external_subdirectory NAME)
 string(TOUPPER ${NAME} UPPER_NAME)
 if (NOTEXISTS ${${UPPER_NAME}_SOURCE_DIR})
 set(${UPPER_NAME}_SOURCE_DIR "${FIREBASE_BINARY_DIR}/external/src/${NAME}")
 set(${UPPER_NAME}_SOURCE_DIR "${${UPPER_NAME}_SOURCE_DIR}" PARENT_SCOPE)
 endif()

 if (NOTEXISTS ${${UPPER_NAME}_BINARY_DIR})
 set(${UPPER_NAME}_BINARY_DIR "${${UPPER_NAME}_SOURCE_DIR}-build")
 set(${UPPER_NAME}_BINARY_DIR "${${UPPER_NAME}_BINARY_DIR}" PARENT_SCOPE)
 endif()

 if (EXISTS"${${UPPER_NAME}_SOURCE_DIR}/CMakeLists.txt")
 add_subdirectory(
 ${${UPPER_NAME}_SOURCE_DIR}
 ${${UPPER_NAME}_BINARY_DIR}
EXCLUDE_FROM_ALL
 )
 endif()
endfunction()