github-workflow: Add new e2e test

[ganto]

No description provided.

[Copilot]

Pull request overview

Adds an expanded, multi-distro e2e testing setup (including an on-demand GitHub Actions workflow) and updates pkgproxy configuration/docs to support Ubuntu security repos consistently across config, landing page snippets, and README.

Changes:

• Restructure test/e2e/e2e_test.go into per-distro top-level tests, add TestMain to build pkgproxy once, and add helpers for repo/sources generation.
• Add new e2e coverage for CentOS Stream, AlmaLinux, Rocky Linux, and Ubuntu; improve e2e shell scripts with config dump output for debugging.
• Add ubuntu-security repository support and update landing page snippets, README/CLAUDE docs, Makefile e2e target, changelog, and a new workflow_dispatch GitHub Actions e2e workflow.

Reviewed changes

Copilot reviewed 19 out of 19 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
test/e2e/test-pacman.sh	Print configured mirrorlist for easier debugging in Arch runs.
test/e2e/test-dnf.sh	Print mounted DNF repo files to aid debugging across RPM distros.
test/e2e/test-apt.sh	Stop generating sources.list in-shell; print mounted sources.list for debugging.
test/e2e/e2e_test.go	Major refactor: TestMain build-once, per-distro tests, new distros, helper extraction.
pkg/pkgproxy/landing_test.go	Update/extend snippet expectations for Ubuntu + new ubuntu-security.
pkg/pkgproxy/landing.go	Split Ubuntu security snippet into a distinct ubuntu-security repo snippet.
configs/pkgproxy.yaml	Add ubuntu-security repository configuration.
README.md	Update Ubuntu apt example to use /ubuntu-security; add e2e testing docs and make targets.
Makefile	Add DISTRO/RELEASE filtering for make e2e with a 15m timeout.
CLAUDE.md	Document make e2e usage; add rules requiring e2e coverage/consistency.
CHANGELOG.md	Note the new default ubuntu-security repository.
.github/workflows/e2e.yaml	Add manually-triggered matrix e2e workflow.
openspec/changes/e2e-github-workflow/tasks.md	Task checklist for the change set.
openspec/changes/e2e-github-workflow/specs/e2e-testing/spec.md	Spec for refactored e2e framework + TestMain build-once approach.
openspec/changes/e2e-github-workflow/specs/e2e-multi-distro/spec.md	Spec for new multi-distro coverage and repo patterns.
openspec/changes/e2e-github-workflow/specs/e2e-github-workflow/spec.md	Spec for the new GitHub Actions workflow behavior/matrix.
openspec/changes/e2e-github-workflow/proposal.md	High-level proposal and impact summary.
openspec/changes/e2e-github-workflow/design.md	Design rationale and trade-offs for workflow + e2e restructuring.
openspec/changes/e2e-github-workflow/.openspec.yaml	OpenSpec metadata for this change set.

Comments suppressed due to low confidence (1)

test/e2e/e2e_test.go:147

• For Docker on Linux, host.docker.internal typically does not resolve inside containers unless an explicit host mapping is added (e.g. --add-host=host.docker.internal:host-gateway). Since proxyAddr is built from hostGateway and the GitHub Actions workflow forces CONTAINER_RUNTIME=docker, containers may be unable to reach the host-side pkgproxy. Consider adding a Docker-specific flag in runContainer to ensure host.docker.internal is resolvable (or otherwise pass the host gateway IP/hostname in a way that works on Linux runners).

func runContainer(t *testing.T, image string, mounts []string, cmdArgs []string) {
	t.Helper()
	args := []string{"run", "--rm"}
	for _, m := range mounts {
		args = append(args, "-v", m)
	}
	args = append(args, image)
	args = append(args, cmdArgs...)

	t.Logf("running: %s %v", containerRuntime, args)
	cmd := exec.Command(containerRuntime, args...)
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr
	err := cmd.Run()
	require.NoError(t, err, "container command failed")

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[ganto]

Code review

No issues found. Checked for bugs and CLAUDE.md compliance.

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