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# run-and-compare.cmake -- Runs a command and compares its output to an expected value
# Copyright (C) 2021 Nathan Moinvaziri
# Licensed under the Zlib license, see LICENSE.md for details
# Required Variables
# COMMAND - Command to run
# OUTPUT - Standard output
# COMPARE - String to compare output against
# Optional Variables
# INPUT - Standard input
# IGNORE_LINE_ENDINGS - Ignore line endings when comparing output
if(NOT DEFINED OUTPUT OR NOT DEFINED COMPARE OR NOT DEFINED COMMAND)
message(FATAL_ERROR "Run and compare arguments missing")
endif()
# Ensure directory exists for output files
get_filename_component(OUTPUT_DIR "${OUTPUT}" DIRECTORY)
file(MAKE_DIRECTORY "${OUTPUT_DIR}")
if(INPUT)
# Run command with stdin input and redirect stdout to output
execute_process(COMMAND ${CMAKE_COMMAND}
"-DCOMMAND=${COMMAND}"
-DINPUT=${INPUT}
-DOUTPUT=${OUTPUT}
"-DSUCCESS_EXIT=${SUCCESS_EXIT}"
-P ${CMAKE_CURRENT_LIST_DIR}/run-and-redirect.cmake
RESULT_VARIABLE CMD_RESULT)
else()
# Run command and redirect stdout to output
execute_process(COMMAND ${CMAKE_COMMAND}
"-DCOMMAND=${COMMAND}"
-DOUTPUT=${OUTPUT}
"-DSUCCESS_EXIT=${SUCCESS_EXIT}"
-P ${CMAKE_CURRENT_LIST_DIR}/run-and-redirect.cmake
RESULT_VARIABLE CMD_RESULT)
endif()
if(CMD_RESULT)
message(FATAL_ERROR "Run before compare failed: ${CMD_RESULT}")
endif()
# Use configure_file to normalize line-endings
if(IGNORE_LINE_ENDINGS)
# Rewrite files with normalized line endings to temporary directory
get_filename_component(COMPARE_NAME ${COMPARE} NAME)
set(COMPARE_TEMP ${CMAKE_CURRENT_BINARY_DIR}/Testing/Temporary/${COMPARE_NAME}.cmp)
configure_file(${COMPARE} ${COMPARE_TEMP} NEWLINE_STYLE LF)
set(COMPARE ${COMPARE_TEMP})
get_filename_component(OUTPUT_NAME ${OUTPUT} NAME)
set(OUTPUT_TEMP ${CMAKE_CURRENT_BINARY_DIR}/Testing/Temporary/${OUTPUT_NAME}.cmp)
configure_file(${OUTPUT} ${OUTPUT_TEMP} NEWLINE_STYLE LF)
set(OUTPUT ${OUTPUT_TEMP})
endif()
# Compare that output is equal to specified file
execute_process(COMMAND ${CMAKE_COMMAND}
-E compare_files ${COMPARE} ${OUTPUT}
RESULT_VARIABLE CMD_RESULT)
# Delete temporary files used to normalize line-endings
if(IGNORE_LINE_ENDINGS)
file(REMOVE ${COMPARE} ${OUTPUT})
endif()
if(CMD_RESULT)
message(FATAL_ERROR "Run compare failed: ${CMD_RESULT}")
endif()
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