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if(NOT DEFINED CMake_SOURCE_DIR)
message(FATAL_ERROR "CMake_SOURCE_DIR not defined")
endif()
if(NOT DEFINED dir)
message(FATAL_ERROR "dir not defined")
endif()
if(NOT DEFINED gen)
message(FATAL_ERROR "gen not defined")
endif()
# Call cmake once to get a baseline/reference output build tree: "Build".
# Then call cmake N more times, each time making a copy of the entire
# build tree after cmake is done configuring/generating. At the end,
# analyze the diffs in the generated build trees. Expect no diffs.
#
message(STATUS "CTEST_FULL_OUTPUT (Avoid ctest truncation of output)")
set(N 7)
# First setup source and binary trees:
#
execute_process(COMMAND ${CMAKE_COMMAND} -E remove_directory
${dir}/Source
)
execute_process(COMMAND ${CMAKE_COMMAND} -E remove_directory
${dir}/Build
)
execute_process(COMMAND ${CMAKE_COMMAND} -E copy_directory
${CMake_SOURCE_DIR}/Tests/CTestTest/SmallAndFast
${dir}/Source
)
execute_process(COMMAND ${CMAKE_COMMAND} -E make_directory
${dir}/Build
)
# Patch SmallAndFast to build a .cxx executable too:
#
execute_process(COMMAND ${CMAKE_COMMAND} -E copy
${dir}/Source/echoargs.c
${dir}/Source/echoargs.cxx
)
file(APPEND "${dir}/Source/CMakeLists.txt" "\nadd_executable(echoargsCXX echoargs.cxx)\n")
# Loop N times, saving a copy of the configured/generated build tree each time:
#
foreach(i RANGE 1 ${N})
# Equivalent sequence of shell commands:
#
message(STATUS "${i}: cd Build && cmake -G \"${gen}\" ../Source && cd .. && cp -r Build b${i}")
# Run cmake:
#
execute_process(COMMAND ${CMAKE_COMMAND} -G ${gen} ../Source
RESULT_VARIABLE result
OUTPUT_VARIABLE stdout
ERROR_VARIABLE stderr
WORKING_DIRECTORY ${dir}/Build
)
message(STATUS "result='${result}'")
message(STATUS "stdout='${stdout}'")
message(STATUS "stderr='${stderr}'")
message(STATUS "")
# Save this iteration of the Build directory:
#
execute_process(COMMAND ${CMAKE_COMMAND} -E remove_directory
${dir}/b${i}
)
execute_process(COMMAND ${CMAKE_COMMAND} -E copy_directory
${dir}/Build
${dir}/b${i}
RESULT_VARIABLE result
OUTPUT_VARIABLE stdout
ERROR_VARIABLE stderr
)
message(STATUS "result='${result}'")
message(STATUS "stdout='${stdout}'")
message(STATUS "stderr='${stderr}'")
message(STATUS "")
endforeach()
# Function to analyze diffs between two directories.
# Set DIFF_EXECUTABLE before calling if 'diff' is available.
#
function(analyze_directory_diffs d1 d2 diff_count_var)
set(diffs 0)
message(STATUS "Analyzing directory diffs between:")
message(STATUS " d1='${d1}'")
message(STATUS " d2='${d2}'")
if(NOT "${d1}" STREQUAL "" AND NOT "${d2}" STREQUAL "")
message(STATUS "info: analyzing directories")
file(GLOB_RECURSE files1 RELATIVE "${d1}" "${d1}/*")
file(GLOB_RECURSE files2 RELATIVE "${d2}" "${d2}/*")
if("${files1}" STREQUAL "${files2}")
message(STATUS "info: file lists the same")
#message(STATUS " files='${files1}'")
foreach(f ${files1})
execute_process(COMMAND ${CMAKE_COMMAND} -E compare_files
${d1}/${f}
${d2}/${f}
RESULT_VARIABLE result
OUTPUT_VARIABLE stdout
ERROR_VARIABLE stderr
)
if(result STREQUAL 0)
#message(STATUS "info: file '${f}' the same")
else()
math(EXPR diffs "${diffs} + 1")
message(STATUS "warning: file '${f}' differs from d1 to d2")
file(READ "${d1}/${f}" f1contents)
message(STATUS "contents of file '${d1}/${f}'
[===[${f1contents}]===]")
file(READ "${d2}/${f}" f2contents)
message(STATUS "contents of file '${d2}/${f}'
[===[${f2contents}]===]")
if(DIFF_EXECUTABLE)
message(STATUS "diff of files '${d1}/${f}' '${d2}/${f}'")
message(STATUS "[====[")
execute_process(COMMAND ${DIFF_EXECUTABLE} "${d1}/${f}" "${d2}/${f}")
message(STATUS "]====]")
endif()
endif()
endforeach()
else()
math(EXPR diffs "${diffs} + 1")
message(STATUS "warning: file *lists* differ - some files exist in d1/not-d2 or not-d1/d2...")
message(STATUS " files1='${files1}'")
message(STATUS " files2='${files2}'")
endif()
endif()
set(${diff_count_var} ${diffs} PARENT_SCOPE)
endfunction()
# Analyze diffs between b1:b2, b2:b3, b3:b4, b4:b5 ... bN-1:bN.
# Expect no diffs.
#
find_program(DIFF_EXECUTABLE diff)
set(total_diffs 0)
foreach(i RANGE 2 ${N})
math(EXPR prev "${i} - 1")
set(count 0)
analyze_directory_diffs(${dir}/b${prev} ${dir}/b${i} count)
message(STATUS "diff count='${count}'")
message(STATUS "")
math(EXPR total_diffs "${total_diffs} + ${count}")
endforeach()
message(STATUS "CMAKE_COMMAND='${CMAKE_COMMAND}'")
message(STATUS "total_diffs='${total_diffs}'")
|
