Declarative local creation of Hydra jobsets

Main job "simple-program" (jobs/release.nix) is not local. It is pulled remotely so local changes to jobs/release.nix will not be registered by Hydra

1. Create linux/nixos hydra user

   • Generally not needed, but here paths are absolute (/home/hydra/test-declarative-proj-src) since relative paths (./) are not possible in hydra's spec.json
   • Alternatively edit local paths in spec.json

2. Clone this project in/home/hydra

3. Create postgresql user hydra and db hydra (owned by hydra)

   • Set env var $HYDRA_DBI to dbi:Pg:dbname=hydra;host=localhost;user=hydra;

4. Create hydra user like described in https://nixos.org/hydra/manual/

5. Login with hydra user in localhost:3000

   • Admin -> Create Project
     • Set enable to true
     • Choose name and description
     • Set Declarative spec file to spec.json
     • Set Declarative input type to Local path and value to spec.json directory (/home/hydra/test-declarative-proj-src)

6. Start hydra-evaluator and hydra-queue-runner in separate shells

7. Jobsets should start appear in localhost:3000 interface

   • First .jobsets` jobset, then trivial jobsets after .jobsets is evalueted and built