nixos/buildkite-agent: set StateDirectory=buildkite-agent, extend vm test #78140
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We run buildkite from inside /var/lib/buildkite-agent, and do some setup
at runtime (as we need to assemble the config file containing secrets at
runtime).
We did rely on rely on users.users."buildkite-agent".createHome to set
up that directory.
However, when configuring another user to run buildkite as
(by services.buildkite-agent.user), this directory doesn't exist
automatically.
Let's not require the user to set it up, instead just use
StateDirectory=buildkite-agent
unconditionally to create it.Also, extend the VM test to create a second runner, running as a different user, and having no ssh key configured.
Motivation for this change
Things done
sandbox
innix.conf
on non-NixOS linux)nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
./result/bin/
)nix path-info -S
before and after)