upload-artifact@v3's glob silently skips hidden files, so uploading a
bare `.coverage.unit` logged "No files were found. No artifacts will be
uploaded" and registered nothing — the coverage job's download then 404'd
("List Artifacts failed: 404"). The coverage report step read the same
file fine, confirming it existed; only the leading dot broke the upload.
The old pipeline's cross-job artifacts (infra-candidate/, firecracker-
inputs) worked precisely because they were non-dotfiles.
Each test job now copies its .coverage.<suffix> to a non-dot
coverage-<suffix>.dat before upload (the cp also fails loudly if coverage
never wrote the file), and the coverage job renames them back to
.coverage.* before `coverage combine`.
coverage run's --data-file flag can be overridden or ignored in some
runner environments (Nix Python, older act-based runners). Switching to
the COVERAGE_FILE env var with an absolute ${{ github.workspace }} path
ensures coverage.py writes to a known location in every runner context,
so upload-artifact can find the file.
Also adds --reuse-published to the infra build step: if the artifact for
this content hash already exists in the registry, download it instead of
running the full docker build → mke2fs → gzip pipeline.
The delphi-ci runner resolves relative paths in upload-artifact and
download-artifact from a different CWD than run: shell steps, so
'.coverage.unit' etc. were never found. Using ${{ github.workspace }}
gives an absolute path that does not depend on the JS action's CWD.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Each test job now runs once under coverage and uploads a small .coverage.*
artifact. The coverage job combines them on ubuntu-latest — no test reruns,
no KVM dependency. The infra candidate is built directly on the KVM runner,
eliminating the build-infra job and the ~70 s upload + ~83 s combined
download. For PRs, no rootfs artifact is transferred at all. Main-branch
pushes upload the tested rootfs and matching dropbear so publish-infra
publishes the byte-identical artifact. relative_files = True in .coveragerc
lets coverage files from different runners combine without path remapping.
Closes#446
didericis-codex
didericis-claude