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# (C) Copyright 2011- ECMWF.
#
# This software is licensed under the terms of the Apache Licence Version 2.0
# which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
# In applying this licence, ECMWF does not waive the privileges and immunities
# granted to it by virtue of its status as an intergovernmental organisation nor
# does it submit to any jurisdiction.
##############################################################################
#.rst:
#
# ecbuild_add_persistent
# ======================
#
# Add persistent layer object classes. ::
#
# ecbuild_add_persistent( SRC_LIST <variable>
# FILES <file1> [<file2> ...] ]
# [ NAMESPACE <namespace> ] )
#
# Options
# -------
#
# SRC_LIST : required
# CMake variable to append the generated persistent layer objects to
#
# FILES : required
# list of base names of files to build persistent class information for
#
# The source file is expected to have a .h extension, the generated file
# gets a .b extension.
#
# NAMESPACE : optional
# C++ namespace to place the persistent class information in
#
##############################################################################
# define the script to build the persistent class information
set( sg_perl "${CMAKE_CURRENT_LIST_DIR}/sg.pl" CACHE INTERNAL "perl script to generate persistent objects" )
function( ecbuild_add_persistent )
ecbuild_find_perl( REQUIRED )
set( options )
set( single_value_args SRC_LIST NAMESPACE )
set( multi_value_args FILES )
cmake_parse_arguments( _PAR "${options}" "${single_value_args}" "${multi_value_args}" ${_FIRST_ARG} ${ARGN} )
if(_PAR_UNPARSED_ARGUMENTS)
ecbuild_critical("Unknown keywords given to ecbuild_add_persistent(): \"${_PAR_UNPARSED_ARGUMENTS}\"")
endif()
if( NOT _PAR_SRC_LIST )
ecbuild_critical("The call to ecbuild_add_persistent() doesn't specify the SRC_LIST.")
endif()
ecbuild_debug( "ecbuild_add_persistent: adding persistent layer for [${_PAR_FILES}]" )
set(_SOURCES ${${_PAR_SRC_LIST}})
foreach( file ${_PAR_FILES} )
get_filename_component( _file_dir ${file} PATH )
get_filename_component( _file_we ${file} NAME_WE )
set( file ${_file_we} )
if( _file_dir )
file( MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/${_file_dir} )
set( file ${_file_dir}/${_file_we} )
endif()
ecbuild_debug( "ecbuild_add_persistent: adding persistent layer for ${file}.b with namespace '${_PAR_NAMESPACE}' from ${file}.h in ${CMAKE_CURRENT_BINARY_DIR}/${_file_dir}" )
add_custom_command( OUTPUT ${file}.b
COMMAND ${PERL_EXECUTABLE} ${sg_perl} ${CMAKE_CURRENT_SOURCE_DIR}/${file}.h
${CMAKE_CURRENT_BINARY_DIR}/${_file_dir} ${_PAR_NAMESPACE}
DEPENDS ${sg_perl} ${file}.h )
set_source_files_properties( ${file}.h PROPERTIES OBJECT_DEPENDS "${file}.b" )
list( APPEND _SOURCES ${CMAKE_CURRENT_BINARY_DIR}/${file}.b )
endforeach()
if( _SOURCES )
list(REMOVE_DUPLICATES _SOURCES)
endif()
set(${_PAR_SRC_LIST} ${_SOURCES} PARENT_SCOPE)
endfunction( ecbuild_add_persistent )
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