containers: use 'podman' or 'sudo docker' in unit-tests scripts #12286
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Detect if we have podman installed and use that in preference to docker.
If we have only docker, make sure to run it under sudo.
This commit is a little bit ugly, particularly in the 'exec' script: we
can end up running sudo more than once for the normal case where we
detect the ID. I have some weird ideas about how to work around that,
but they're pretty evil.
The sed thing is also pretty nasty.
...