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Nixos tests #299

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This adds a checks directory with bash scripts to run inside of a VM for testing the functionality of bcachefs-tools. Useful for regression testing but needs to be fleshed out more to cover all of the commands.

Supersedes #296 (just shouldn't even have put wip/ into the branch name in the first place.)

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tmuehlbacher commented Jun 22, 2024

Just btw, I am not sure that Kent will merge this. For me it was useful already but the larger idea is to use some of this stuff with the NixOS testing library for ktest. I have some ideas for that and this was helpful to familiarize myself with nixos testing but it's still a larger undertaking for me that I am just starting with. :)

@tmuehlbacher tmuehlbacher force-pushed the nixos-tests branch 2 times, most recently from 1603b73 to a062514 Compare June 22, 2024 12:02
Use nixos-test scaffolding to spawn VMs and run any scripts in
`checks/*.sh` as tests inside of the VM. This should lessen the risk of
any obvious breakage in the CI but needs more and better tests to cover
more commands.

Signed-off-by: Thomas Mühlbacher <tmuehlbacher@posteo.net>
This in particular speeds up the dev/run/debug cycle for writing more
tests. Without this, the actual bcachefs-tools package will be rebuilt
by Nix all the time because of changes to files that are tracked by git.
Even when it's changes in parts that aren't relevant to that package
build such as `checks/*`.

Signed-off-by: Thomas Mühlbacher <tmuehlbacher@posteo.net>
This reverts commit 88aa61e.

No longer required because the added nixos-tests check already causes
the package to be built now.

Signed-off-by: Thomas Mühlbacher <tmuehlbacher@posteo.net>
The second mount works if the device is already part of the `bcachefs
format` but fails if it's added afterwards. In particular the `blkid`
output is interesting.
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