kicad/CMakeModules/BuildSteps/LemonParserGenerator.cmake

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# This program source code file is part of KICAD, a free EDA CAD application.
#
# Copyright (C) 2020 Kicad Developers, see AUTHORS.txt for contributors.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, you may find one here:
# http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
# or you may search the http://www.gnu.org website for the version 2 license,
# or you may write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
#
# This file takes the following variables as arguments:
# * LEMON_EXE - The absolute path to the lemon executable
# * LEMON_TEMPLATE - The absolute path to the lemon template file
# * GRAMMAR_FILE - The file of the grammar to use
# * GRAMMAR_DIR - An absolute path to where the grammar should be generated
# Get the name without extension
get_filename_component( GRAMMAR_BASE ${GRAMMAR_FILE} NAME_WE )
# Only regenerate the lemon code if the grammar is newer than the current code
if( ${GRAMMAR_FILE} IS_NEWER_THAN ${GRAMMAR_DIR}/${GRAMMAR_BASE}.c )
execute_process(
COMMAND ${LEMON_EXE} -T${LEMON_TEMPLATE} -d${GRAMMAR_DIR} -q ${GRAMMAR_FILE}
WORKING_DIRECTORY ${GRAMMAR_DIR}
OUTPUT_VARIABLE _lemon_output
ERROR_VARIABLE _lemon_error
RESULT_VARIABLE _lemon_result
OUTPUT_STRIP_TRAILING_WHITESPACE
)
if( NOT ${_lemon_result} EQUAL 0)
message( FATAL_ERROR "Lemon generator for ${GRAMMAR_FILE} has failed\n"
"Error: ${_lemon_error}" )
endif()
endif()