bootc-ubuntu-setup: Add support for ubuntu-26.04 runners - #52
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August 19, 2026 18:44
Ubuntu 26.04 ships a sufficiently modern podman (with heredoc support and no manifest handling bugs), so unlike 24.04 we can skip the plucky PPA and package upgrade path entirely. This simplifies the setup on 26.04 to just installing `just`. The version gate is refactored from a hard `test` assertion into a `case` statement that dispatches per-version setup logic and rejects unsupported runners with a clear error. CI test jobs are added for ubuntu-26.04 in both PR and published-action workflows. The PR test includes a heredoc Containerfile build to verify the native podman meets the minimum capability bar per the acceptance criteria. Closes: #49 Assisted-by: Claude Code (Claude Opus 4) Signed-off-by: Colin Walters <walters@verbum.org>
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Pull request overview
Adds Ubuntu 26.04 support to the reusable setup action while retaining Ubuntu 24.04’s package-upgrade path.
Changes:
- Dispatches package setup by Ubuntu version.
- Adds Ubuntu 26.04 PR and published-action jobs.
- Verifies native Podman heredoc support in CI.
Reviewed changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
bootc-ubuntu-setup/action.yml |
Adds Ubuntu 26.04 package setup. |
.github/workflows/test-actions-pr.yml |
Tests setup and Podman heredocs on 26.04. |
.github/workflows/test-actions-published.yml |
Smoke-tests the published action on 26.04. |
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The ubuntu-24.04 and ubuntu-26.04 bootc-ubuntu-setup test jobs in test-actions-pr.yml and test-actions-published.yml each check the same basic host functionality after setup runs: podman actually runs a container, and the runner's preinstalled (not the pinned setup-rust) Rust and Go toolchains still work. This duplicates the same checks across two jobs and two workflow files. Factor these into a composite action under .github/actions/ rather than the repo's top-level action directories, since this is an internal test helper rather than a published, supported action like bootc-ubuntu-setup or setup-rust. This commit only adds the action; it is not yet wired into any workflow. Assisted-by: AI
Both bootc-ubuntu-setup test jobs (ubuntu-24.04 and ubuntu-26.04) in test-actions-pr.yml, plus their equivalents in test-actions-published.yml, duplicated the same podman/Rust/Go sanity checks inline. Replace that duplication with the composite action added in the prior commit. The local-checkout workflow references the action by relative path (./.github/actions/verify-basic-requirements), while the published workflow references it remotely the same way it already does for bootc-ubuntu-setup and setup-rust (bootc-dev/actions/.github/actions/verify-basic-requirements@main), since GitHub Actions supports uses: for any subdirectory of a repo. The remaining 'Verify setup' step keeps just --version and test -n "$ARCH", which are outputs specific to bootc-ubuntu-setup rather than generic host checks, dropping only the now-redundant podman --version line. Assisted-by: AI
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Same content as #50, with a Signed-off-by added since I could not
push directly to the redhat-chai-bot fork branch (maintainer_can_modify
is false and I don't have collaborator access on that fork).
Closes #50
Assisted-by: Claude Code (Claude Opus 4)