The ticket below reports some very strange behaviour, where
even a simple command like the following
python3 -c "import subprocess; subprocess.run([''])"
actually spawns some process and pass instead of raising
PermissionError. Even though the problem is most probably somewhere
else, not in idf_tools, we may just return early if there is no
command available for get_version().
Closes https://github.com/espressif/esp-idf/issues/11880
Signed-off-by: Frantisek Hrbata <frantisek.hrbata@espressif.com>
bf1a487b73