The [dev-overlay](332c6ab3b9/src/cmd-dev-overlay)
script shipped in coreos-assembler mostly exists to deal
with the nontrivial logic around SELinux policy. Let's make
the use case of "commit some binaries overlaying a base tree, using
the base's selinux policy" just require a magical
`--selinux-policy-from-base` argument to `ostree commit`.
A new C API was added to implement this in the case of `--tree=ref`;
when the base directory is already checked out, we can just reuse
the existing logic that `--selinux-policy` was using.
Requires: https://github.com/ostreedev/ostree/pull/2039
Previously we made an effort to use the [Fedora Standard Test Interface](https://docs.fedoraproject.org/en-US/ci/standard-test-interface/).
This effort was not very successful; the primary thing that
it really died on is Ansible just didn't support rebooting
very well. I think that's since gotten better, but even
then, Ansible wasn't the best thing for a test framework
for us anyways.
In the meantime Fedora CoreOS happened emphasizing Ignition
and not "post-hoc reconciliation" models like Ansible over
ssh.
And, [coreos-assembler](https://github.com/coreos/coreos-assembler) happened too.
Furthermore, we really need to test OSTree's interaction
with Ignition as we've invented several special things there.
Then most recently, I've been working on having
cosa/kola support running externally defined tests:
https://github.com/coreos/coreos-assembler/pull/1215
There's a lot of things to clean up after this but at least this
works for me:
```
$ cd /srv/fcos
$ cosa kola run -- --parallel 4 --output-dir tmp/kola -E ~/src/github/ostreedev/ostree/ 'ext.ostree.*'
```
NOTE: This *does not* drop ostree binaries into the target. See:
https://github.com/coreos/coreos-assembler/pull/1252#issuecomment-600623315
This drops our dependency on Python in the installed tests, and
also fixes a few bugs that came up.
I disabled the `itest-bare-user-root.sh` one because it's
entangled with the shell script infrastructure for the unit tests.
Colin Walters