This is prep for splitting off "nondestructive" tests which
we can run in parallel from the destructive/invasive ones which
e.g. change the host refspec, do deployments.
The `cd` invocation in `prepare_tmpdir` wasn't working because we were running
it in a subshell. Fix this by dropping the subshell.
Closes: #1509
Approved by: jlebon
For ostree-as-host, we're the superuser, so we'll blow past
any reserved free space by default. While deltas have size
metadata, if one happens to do a loose fetch, we can fill
up the disk.
Another case is flatpak: the system helper has similar concerns
here as ostree-as-host, and for `flatpak --user`, we also
want to be nice and avoid filling up the user's quota.
Closes: https://github.com/ostreedev/ostree/issues/962Closes: #987
Approved by: jlebon
Colin Walters