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extract decision of used middleware implementation into separate package

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This commit is contained in:
Dirk Thomas 2014-08-14 15:05:25 -07:00
parent 0559fafcd0
commit 45ee2dd2e1
7 changed files with 90 additions and 39 deletions
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42
ros_middleware_implementation/cmake/get_default_ros_middleware_implementation.cmake Normal file
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#
# Get the package name of the default ROS middleware implemenation.
#
# Either selcting it using the variable ROS_MIDDLEWARE_IMPLEMENTATION or
# choosing a default from the available implementations.
#
# :param var: the output variable name containing the package name
# :type var: string
#
function(get_default_ros_middleware_implementation var)
get_available_ros_middleware_implementations(middleware_implementations)
if("${middleware_implementations}" STREQUAL "")
message(FATAL_ERROR "Could not find any ROS middleware implementation.")
endif()
# option()
if(NOT "${ROS_MIDDLEWARE_IMPLEMENTATION}" STREQUAL "")
set(middleware_implementation "${ROS_MIDDLEWARE_IMPLEMENTATION}")
elseif(NOT "$ENV{ROS_MIDDLEWARE_IMPLEMENTATION}" STREQUAL "")
set(middleware_implementation "$ENV{ROS_MIDDLEWARE_IMPLEMENTATION}")
else()
# TODO detemine "default" implementation based on the available ones
list(GET middleware_implementations 0 middleware_implementation)
endif()
# verify that the selection one is available
list(FIND middleware_implementations "${middleware_implementation}" _index)
if(_index EQUAL -1)
string(REPLACE ";" ", " middleware_implementations_string "${middleware_implementations}")
message(FATAL_ERROR "Could not find ROS middleware implementation '${middleware_implementation}'. Choose one of the following: ${middleware_implementations_string}")
endif()
find_package("${middleware_implementation}" REQUIRED)
# persist implementation decision in cache
set(
ROS_MIDDLEWARE_IMPLEMENTATION "${middleware_implementation}"
CACHE STRING "Select ROS middleware implementation to link against" FORCE
)
set(${var} ${middleware_implementation} PARENT_SCOPE)
endfunction()