CTest CDash run only once
This CMake function works across Windows, macOS, and Linux checks that the current CTest script is the only instance of CTest running at the time. We use this in CTest CDash scripts to avoid unexpectedly long-running scripts overlapping with the next day’s runs. That could exhaust memory and crash the computer.
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| function(ctest_once_only) | |
| # check if CTest already running, error if so | |
| if(WIN32) | |
| find_program(tasklist NAMES tasklist REQUIRED) | |
| execute_process(COMMAND ${tasklist} /fi "Imagename eq ctest.exe" /fo csv | |
| TIMEOUT 10 | |
| RESULT_VARIABLE ret | |
| OUTPUT_VARIABLE out | |
| OUTPUT_STRIP_TRAILING_WHITESPACE | |
| ) | |
| if(NOT ret EQUAL 0) | |
| message(FATAL_ERROR "Could not check if CTest already running") | |
| endif() | |
| string(REGEX MATCHALL "(ctest.exe)" mat "${out}") | |
| list(LENGTH mat L) | |
| if(NOT L EQUAL 1) | |
| message(FATAL_ERROR "CTest already running ${L} times, not starting again. | |
| ${mat}") | |
| endif() | |
| else() | |
| find_program(pgrep NAMES pgrep REQUIRED) | |
| execute_process(COMMAND ${pgrep} ctest | |
| TIMEOUT 10 | |
| RESULT_VARIABLE ret | |
| OUTPUT_VARIABLE out | |
| OUTPUT_STRIP_TRAILING_WHITESPACE | |
| ) | |
| if(ret EQUAL 1) | |
| message(VERBOSE "No CTest found running, proceeding.") | |
| return() | |
| elseif(NOT ret EQUAL 0) | |
| message(FATAL_ERROR "Could not check if CTest already running") | |
| endif() | |
| string(REGEX MATCHALL "([0-9]+)" mat "${out}") | |
| list(LENGTH mat L) | |
| if(NOT L EQUAL 1) | |
| message(FATAL_ERROR "CTest already running ${L} times, not starting again. | |
| ${mat}") | |
| endif() | |
| endif() | |
| endfunction(ctest_once_only) |