fix: remove GHA Docker layer cache causing stale vendor/ COPY

[xnetsc]

fix: remove GHA Docker layer cache to fix stale vendor/ COPY

Summary

The Docker multi-platform build in the release workflow fails with:

unable to open '/app/vendor/websocket': FileNotFound

The vendor/websocket/ directory exists in git and is checked out correctly, but the Zig build inside Docker can't find it. The suspected cause is the GHA layer cache (cache-from: type=gha) returning a stale COPY vendor/ vendor/ layer from a previous build before vendor/websocket/ was added. Docker buildx GHA cache has known issues with COPY cache invalidation.

Changes:

1. Remove cache-from/cache-to from the Docker build-push-action to ensure clean builds
2. Add a diagnostic ls step before the Docker build to verify vendor/websocket/ is present after checkout

Review & Testing Checklist for Human

• Root cause is unverified — the failure could not be reproduced locally (Docker builds succeed every time with --no-cache). The GHA stale cache theory is plausible but not proven. If this fix doesn't resolve the issue, the diagnostic ls step will at least confirm whether the checkout is correct.
• The diagnostic ls runs on the runner, not inside Docker — it verifies actions/checkout has the files, but does NOT verify what buildx actually copies into the container. Consider adding ls vendor/ inside the Dockerfile RUN step as well (before zig build) for deeper diagnosis.
• Removing cache increases Docker build time — each release will rebuild all layers from scratch (~2 min). If this is acceptable, fine; otherwise, consider re-adding cache with scope=${{ github.sha }} after confirming the fix works.
• Test plan: Merge this PR, create a new tag (e.g. v2026.3.13.1), push it, and verify the Docker stage passes in the release workflow. If it still fails, check the Verify build context step output to confirm vendor/websocket/ is listed.

Notes

• Requested by: @mccoysc
• Link to Devin Session

---

Summary by CodeRabbit

Release Notes

• Chores
  • Updated internal CI/CD pipeline configuration to improve build verification and streamline deployment processes.

[devin-ai-integration]

🤖 Devin AI Engineer

I'll be helping with this pull request! Here's what you should know:

✅ I will automatically:

• Address comments on this PR. Add '(aside)' to your comment to have me ignore it.
• Look at CI failures and help fix them

Note: I can only respond to comments from users who have write access to this repository.

⚙️ Control Options:

• Disable automatic comment and CI monitoring

[coderabbitai]

Caution

Review failed

Pull request was closed or merged during review

📝 Walkthrough

Walkthrough

The release workflow configuration was updated to add a docker build context verification step and remove GitHub Actions cache configuration from the docker/build-push-action step.

Changes

Cohort / File(s)	Summary
Workflow Configuration .github/workflows/release.yml	Added "Verify build context" step to list vendor directories; removed cache-from and cache-to options from docker/build-push-action step.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐰 Cache cleared with a hop and a skip,
Vendor dirs now pass the verification trip,
Docker builds fresh, no old ghosts to keep,
The workflow runs clean, oh what a leap! ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: removing GitHub Actions Docker layer cache that was causing stale vendor/ COPY issues in the release workflow.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch devin/1773393876-fix-docker-cache

📝 Coding Plan

• Generate coding plan for human review comments

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 2 additional findings.