CNTRLPLANE-3945: fix(docs): set writable uv cache path for arc-runner-set

[celebdor]

Summary

• Fix docs build failure on arc-runner-set runners after CNTRLPLANE-3945: Migrate documentation tooling from mkdocs-material to zensical #9139 merged
• On these runners HOME=/, so setup-uv resolves its cache to /.cache/uv which isn't writable
• Set cache-local-path: ${{ runner.temp }}/.uv-cache to use a writable directory

Test plan

• build / Build Docs CI check passes on this PR

🤖 Generated with Claude Code

Summary by CodeRabbit

• Chores
  • Updated documentation build configuration to use a temporary local cache directory for tooling, improving build environment isolation.

[openshift-merge-bot]

Pipeline controller notification
This repo is configured to use the pipeline controller. Second-stage tests will be triggered either automatically or after lgtm label is added, depending on the repository configuration. The pipeline controller will automatically detect which contexts are required and will utilize /test Prow commands to trigger the second stage.

For optional jobs, comment /test ? to see a list of all defined jobs. To trigger manually all jobs from second stage use /pipeline required command.

This repository is configured in: LGTM mode

[openshift-ci-robot]

@celebdor: This pull request references CNTRLPLANE-3945 which is a valid jira issue.

Details

In response to this:

Summary

• Fix docs build failure on arc-runner-set runners after CNTRLPLANE-3945: Migrate documentation tooling from mkdocs-material to zensical #9139 merged
• On these runners HOME=/, so setup-uv resolves its cache to /.cache/uv which isn't writable
• Set cache-local-path: ${{ runner.temp }}/.uv-cache to use a writable directory

Test plan

• build / Build Docs CI check passes on this PR

🤖 Generated with Claude Code

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository YAML (base), Central YAML (inherited)

Review profile: CHILL

Plan: Enterprise

Run ID: f86b155f-13d1-45ff-9a29-f29a4cc3f608

📥 Commits

Reviewing files that changed from the base of the PR and between 6c3f984 and d2412ad.

📒 Files selected for processing (1)

• .github/workflows/docs-build-reusable.yaml

---

📝 Walkthrough

Walkthrough

The reusable documentation workflow configures setup-uv to store its local cache at ${{ runner.temp }}/.uv-cache. No exported or public entities change.

Suggested reviewers: mgencur

🚥 Pre-merge checks | ✅ 11

✅ Passed checks (11 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies the documentation fix and the writable UV cache path for arc-runner-set runners.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Stable And Deterministic Test Names	✅ Passed	The PR changes only a workflow cache path and adds no Ginkgo test declarations or test titles; the stability check is not applicable.
Test Structure And Quality	✅ Passed	The PR changes only .github/workflows/docs-build-reusable.yaml; no Ginkgo test code or It blocks were added or modified, so this check is not applicable.
Topology-Aware Scheduling Compatibility	✅ Passed	The change only updates setup-uv cache path in a GitHub Actions workflow; it adds no deployment manifest, operator code, controller, or scheduling constraint.
Ipv6 And Disconnected Network Test Compatibility	✅ Passed	The PR changes only the docs workflow and adds no Ginkgo e2e tests, network assumptions, or external connectivity requirements.
No-Weak-Crypto	✅ Passed	The PR changes only a workflow cache path; the commit diff and changed-file scan show no weak crypto, custom crypto, or secret/token comparison.
Container-Privileges	✅ Passed	The PR only adds a writable setup-uv cache path in a GitHub Actions workflow; it changes no container or Kubernetes manifest and adds no listed privilege settings.
No-Sensitive-Data-In-Logs	✅ Passed	The committed change adds only the runner-temporary uv cache path; it adds no logging and exposes no passwords, tokens, API keys, PII, hostnames, or customer data.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix-uv-cache-docs-build

---

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

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: celebdor
Once this PR has been reviewed and has the lgtm label, please assign csrwng for approval. For more information see the Code Review Process.

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[openshift-ci]

@celebdor: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/images	d2412ad	link	true	/test images

Full PR test history. Your PR dashboard.

Details

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.