[PATCH 0/8] kdevops: small NIXOS and gen_hosts fixes

Small cleanups picked up while building the new bringup backend that
depends on this series. Each patch is independent and stands on its
own: duplicated Makefile vars, ineffective silent recipe guards, libvirt
XML and cleanup path drift on the NIXOS role, and gen_hosts rough edges
around inventory group scoping and inventory owner refresh.

Preparatory series for the upstreaming of nixos-qemu [1] and
qemu-system-units [2] as git subtrees. The two projects provide an
alternative to kdevops libvirtd, libguestfs, and virsh stack for local
VM bringup, one that sidesteps the sudo and privilege escalation the
Ansible host-setup playbooks currently need on the control node to drive
that stack. libvirt bringup stays the default and is untouched; the
alternative is opt-in via Kconfig. qemu-system-units renders the QEMU
command line from templates into a systemd user service, so VMs run in
the user session with no root daemon and no new wrapper on top of QEMU.
nixos-qemu builds image-based and imageless guests declaratively through
a NixOS flake, with no libguestfs in the loop.

Link: https://github.com/linux-kdevops/nixos-qemu [1]
Link: https://github.com/linux-kdevops/qemu-system-units [2]
Signed-off-by: Daniel Gomez <[email protected]>
---
Daniel Gomez (8):
      nixos: remove duplicate nixos_channel extra-var from Makefile
      nixos: do not emit comment-only recipe lines under $(Q)
      nixos: drop hardcoded qxl video model from libvirt XML
      nixos: destroy the libvirt domain before cleaning up local artefacts
      gen_hosts: scope the python interpreter per inventory group
      gen_hosts: make the linux workflow node name follow bootlinux_builder
      defconfigs/nixos: name NIXOS hosts with the "nixos" prefix
      gen_hosts: drop sudo become on inventory owner refresh

 defconfigs/nixos                                   |  1 +
 kconfigs/Kconfig.ansible_provisioning              | 33 ++++++++++++++++
 playbooks/nixos.yml                                | 14 +++++++
 playbooks/roles/gen_hosts/tasks/main.yml           |  3 --
 playbooks/roles/gen_hosts/templates/blktests.j2    |  6 +--
 playbooks/roles/gen_hosts/templates/cxl.j2         |  6 +--
 playbooks/roles/gen_hosts/templates/fio-tests.j2   |  8 ++--
 playbooks/roles/gen_hosts/templates/fstests.j2     | 16 ++++----
 playbooks/roles/gen_hosts/templates/gitr.j2        | 10 ++---
 playbooks/roles/gen_hosts/templates/ltp.j2         |  6 +--
 playbooks/roles/gen_hosts/templates/mmtests.j2     |  8 ++--
 playbooks/roles/gen_hosts/templates/nfstest.j2     | 10 ++---
 playbooks/roles/gen_hosts/templates/pynfs.j2       | 10 ++---
 playbooks/roles/gen_hosts/templates/selftests.j2   |  6 +--
 playbooks/roles/gen_hosts/templates/sysbench.j2    |  6 +--
 .../roles/gen_hosts/templates/workflows/ai.j2      | 14 +++----
 .../gen_hosts/templates/workflows/blktests.j2      | 10 ++---
 .../gen_hosts/templates/workflows/build-linux.j2   | 30 +++++++--------
 .../templates/workflows/declared-hosts.j2          | 44 +++++++++++-----------
 .../gen_hosts/templates/workflows/fio-tests.j2     | 16 ++++----
 .../roles/gen_hosts/templates/workflows/fstests.j2 | 12 +++---
 .../roles/gen_hosts/templates/workflows/generic.j2 |  2 +-
 .../roles/gen_hosts/templates/workflows/gitr.j2    | 12 +++---
 .../roles/gen_hosts/templates/workflows/linux.j2   | 23 ++++++++---
 .../roles/gen_hosts/templates/workflows/ltp.j2     |  8 ++--
 .../roles/gen_hosts/templates/workflows/minio.j2   | 26 ++++++-------
 .../roles/gen_hosts/templates/workflows/mix.j2     | 10 ++---
 .../roles/gen_hosts/templates/workflows/mmtests.j2 |  8 ++--
 .../roles/gen_hosts/templates/workflows/nfstest.j2 | 12 +++---
 .../roles/gen_hosts/templates/workflows/pynfs.j2   | 10 ++---
 .../gen_hosts/templates/workflows/reboot-limit.j2  |  6 +--
 .../gen_hosts/templates/workflows/selftests.j2     |  8 ++--
 .../gen_hosts/templates/workflows/sysbench.j2      |  8 ++--
 .../roles/gen_hosts/templates/workflows/vllm.j2    | 14 +++----
 playbooks/templates/nixos/vm-libvirt.xml.j2        |  5 ---
 scripts/nixos.Makefile                             |  6 +--
 36 files changed, 239 insertions(+), 188 deletions(-)
---
base-commit: 1a61f43dc2bc2e019fc4a35d9673cfa31909272d
change-id: 20260422-kdevops-series-a-fixes-e26bd7d77c76

Best regards,
--  
Daniel Gomez <[email protected]>