feat: support local landscape-server .deb via Juju resource

[jansdhillon]

Add a landscape-server-deb file resource. When attached at deploy time, the charm installs it directly instead of pulling from the PPA. The PPA is still added first so all dependencies are available. The upgrade action also checks for the resource and installs from it when present. --no-install-recommends is passed only when min_install=true. When no resource is attached the behaviour is unchanged.

Manual testing

Download the deb to the repo root:

wget https://launchpad.net/~landscape/+archive/ubuntu/self-hosted-daily/+files/landscape-server_26.04~rc1-0landscape0~noble_amd64.deb

Temporarily add the resource to bundle-examples/bundle.yaml. Also, add the self-hosted-daily PPA since that's where we're pulling the deb from. The path is relative to the bundle file, so reference the deb from the repo root with ../:

landscape-server:
  charm: ../landscape-server_ubuntu@24.04-amd64.charm
  ...
  options:
      landscape_ppa: "ppa:landscape/self-hosted-daily"
      ...
  ...
  resources:
    landscape-server-deb: ../landscape-server_26.04~rc1-0landscape0~noble_amd64.deb

Deploy:

make deploy

Verify the local deb was installed:

juju ssh landscape-server/0 "sudo apt policy landscape-server"
# Installed: 26.04~rc1-0landscape0~noble

[Copilot]

Pull request overview

Adds support for installing landscape-server from an optional locally-provided .deb Juju resource, intended to bypass fetching the package from the Landscape PPA while still using the PPA for dependencies.

Changes:

• Add landscape-server-deb file resource to charm metadata.
• Update charm install logic to install from an attached .deb resource with --no-install-recommends.
• Add/adjust unit and integration tests covering .deb resource behavior.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
src/charm.py	Adds resource fetch helper and conditional install-from-local-deb logic in the install hook.
metadata.yaml	Declares optional landscape-server-deb file resource.
tests/unit/conftest.py	Adds an empty_deb_resource fixture for scenario-based unit tests.
tests/unit/test_charm.py	Updates existing PPA tests and adds new unit tests for local-deb install behavior.
tests/integration/test_bundle.py	Adds an integration test that attaches the resource and expects the charm to install from it.