Adds `pull_request` trigger to docker-publish.yml so PRs that touch
Dockerfile / docker/ / pyproject.toml / uv.lock / the workflow itself
verify the image builds cleanly before merge. Previously, Dockerfile
regressions (e.g. a stale uv.lock, a typo'd dep) would only surface
after merge when the docker-publish workflow ran on main.
Build-verify-only on PRs: the per-arch jobs run their `load: true`
build + smoke test, but the push-by-digest + artifact upload steps
remain gated on push-to-main or release. The `merge` and
`move-latest` jobs stay excluded from PRs by their existing `if:`
gates, so :latest and SHA tags are never touched from PR runs.
Concurrency: PR runs use a PR-scoped group (`docker-<pr_number>`)
with `cancel-in-progress: true` so rapid pushes to the same PR
collapse to the latest commit. Push/release runs keep
`cancel-in-progress: false` — every merge still gets its own
SHA-tagged image.
Also adds arm64 smoke tests (previously amd64-only): the image is
now built with `load: true` on arm64 too, then `docker run --help` +
`dashboard --help` smoke tests run identically on both arches. Both
smoke test blocks were extracted into a new composite action at
`.github/actions/hermes-smoke-test` to keep the two jobs DRY.
New files:
- .github/actions/hermes-smoke-test/action.yml
Modified:
- .github/workflows/docker-publish.yml
* fix(nix): replace magic-nix-cache with Cachix
magic-nix-cache caused recurring CI failures (TwirpErrorResponse
ResourceExhausted) by hitting GitHub Actions Cache's 10 GB limit and
200 req/min rate limit. This was flagged as 'unfixable infra flake' in
#17836 but is actually a fixable architecture choice.
Switch to Cachix (dedicated binary cache, no GHA quota dependency):
- Replace DeterminateSystems/magic-nix-cache-action with cachix/cachix-action
- Add cachix-auth-token input to nix-setup composite action
- Pass CACHIX_AUTH_TOKEN secret through all three nix workflows
- continue-on-error: true so cache failures never block CI
Cache 'hermes-agent' is public at hermes-agent.cachix.org.
Devs can pull locally with: cachix use hermes-agent
* fix: correct cachix-action commit SHA pin
---------
Co-authored-by: Hermes Agent <hermes@nousresearch.com>
