execute_process fails

[razaqq]

im building qwindowkit in github actions on ubuntu-latest with gcc and ninja (cmake -S . -B build -G Ninja -DCMAKE_BUILD_TYPE=Release -DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++)

however this part keeps erroring

qmsetup/cmake/modules/InstallPackage.cmake

Lines 92 to 100 in 1c82f2e

	execute_process(
	COMMAND ${CMAKE_COMMAND} -S ${_src_dir} -B ${_build_dir}
	${_generator} ${_build_type}
	"-DCMAKE_INSTALL_PREFIX=${_install_dir}" ${FUNC_CONFIGURE_ARGS}
	OUTPUT_FILE ${_log_file}
	ERROR_FILE ${_log_file}
	RESULT_VARIABLE _code
	WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
	)

CMake Error at DummyProject/ThirdParty/qwindowkit/qmsetup/cmake/modules/InstallPackage.cmake:108 (message):
  Configure failed, check
  "/home/runner/work/DummyProject/DummyProject/build/_build/qmsetup_configure.log"

qmsetup_configure.log:

Run cat /home/runner/work/DummyProject/DummyProject/build/_build/qmsetup_configure.log
CMake Error: CMake was unable to find a build program corresponding to "Ninja".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
CMake Error: CMAKE_C_COMPILER not set, after EnableLanguage
CMake Error: CMAKE_CXX_COMPILER not set, after EnableLanguage
-- Configuring incomplete, errors occurred!

so i went back and added some logging just before

execute_process(COMMAND ninja --version)
message("${CMAKE_COMMAND} -S ${_src_dir} -B ${_build_dir} ${_generator} ${_build_type}")

which yields

1.11.1
/usr/local/bin/cmake -S /home/runner/work/DummyProject/DummyProject/ThirdParty/qwindowkit/qmsetup -B /home/runner/work/DummyProject/DummyProject/build/_build/qmsetup -G Ninja -DCMAKE_BUILD_TYPE=Release

the full command cmake runs is:

execute_process(COMMAND /usr/local/bin/cmake -S /home/runner/work/DummyProject/DummyProject/ThirdParty/qwindowkit/qmsetup -B /home/runner/work/DummyProject/DummyProject/build/_build/qmsetup -G Ninja -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/home/runner/work/DummyProject/DummyProject/build/_install  OUTPUT_FILE /home/runner/work/DummyProject/DummyProject/build/_build/qmsetup_configure.log ERROR_FILE /home/runner/work/DummyProject/DummyProject/build/_build/qmsetup_configure.log RESULT_VARIABLE _code WORKING_DIRECTORY /home/runner/work/DummyProject/DummyProject/ThirdParty/qwindowkit )

so both ninja is found in PATH, and the command run is perfectly fine. how is this possible?
like i said, this happens only in CI, not locally

[razaqq]

Update:
It seems that switching from https://github.com/ashutoshvarma/setup-ninja to just installing ninja with apt fixes it. I have no idea how that is possible since both put ninja is path but whatever

[SineStriker]

I don't know how this happened as well. https://github.com/ashutoshvarma/setup-ninja just downloads Ninja and adds it to PATH.