chore: add renovate configuration for GitHub Actions updates

[ysinghc]

Description of Changes

Adds .github/renovate.json to onboard Renovate for automated dependency
updates in the devfile/api repository.

The initial configuration is intentionally scoped to GitHub Actions only:

• Pins GitHub Action versions to commit digests (helpers:pinGitHubActionDigests).
• Groups GitHub Actions updates into a single PR.
• Runs on the org's standard schedule (timezone America/Toronto).
• Enables vulnerability alerts and applies the renovatebot label.
• Signs off generated commits (:gitSignOff).

Go module updates (and other managers) are intentionally left out of this
initial config; Go dependency patching is handled separately.

Related Issue(s)

#1725

Acceptance Criteria

• Unit/Functional tests

• QE Integration test

• Documentation

  config file added in .github

• Client Impact

  no client impact, config changes only

Tests Performed

How To Test

Notes To Reviewer

Enable the Renovate GitHub app on the repo.

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Reviewing files that changed from the base of the PR and between cca2429 and 006fdd6.

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• .github/renovate.json

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📝 Walkthrough

The PR adds Renovate configuration for GitHub Actions. It sets a schedule, groups updates, enables vulnerability alerts, limits PR creation, and applies a label.

Changes: Renovate automation

Layer / File(s)	Summary
Renovate update configuration .github/renovate.json	Extends recommended settings, pins GitHub Action digests, and enables signed-off commits. Configures the update schedule, grouping, vulnerability alerts, PR limits, and the renovatebot label.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~5 minutes

Change: Other

Merge Risk: ⚪ Minimal · up to 006fd

This change only adds Renovate settings for GitHub Actions updates. The earlier problem with unsupported grouping keys is fixed, and the configuration is valid. No merge-blocking risk remains.

Security architecture risk: 🔵 Low · up to 006fd

The automation does not directly change workflow triggers, token wiring, or publication commands. No introduced security vulnerability was established, but effective bot permissions, merge protections, and vulnerability-alert coverage could not be verified.

Retained concerns
No architecture-level concerns identified.

Security review details

Security Blast Radius

• inferred — A malicious action revision selected through an update proposal could affect the workflow that executes it. In the release context, this includes generated package integrity and potential access to publication credentials through a compromised runner. Actual credential scope, package authority, and downstream consumer exposure are not established.

Security Findings and Attack Paths

• observed — The supplied security assessment retains no verified findings. Its vulnerability-alert candidate remains deferred because repository settings and alert coverage for SHA-pinned actions are unavailable. Enabling vulnerabilityAlerts in this file does not resolve that recorded proof gap, and the gap alone does not establish an introduced vulnerability.

Trust Boundaries and Controls

• inferred — The checked files separate dependency proposal generation from main-triggered release execution. No explicit automerge or new credential authority is configured here. Independent review and merge enforcement cannot be assumed, however, because effective installation permissions and repository protections are external to the available evidence.

Hardening Proposals

• proposed — Before relying on this automation for release-action updates, validate independent merge approval, least-privilege bot and workflow permissions, and vulnerability-alert coverage for pinned actions. Treat these as deployment prerequisites to verify, not as controls proven missing by this PR.

Pre-merge checks: 5

Check name	Status	Explanation
Docstring Coverage		No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main change: adding Renovate configuration for GitHub Actions updates.

Full details: Docstring Coverage

Explanation

No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (1 skipped: 1 unsupported.)

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Actionable comments posted: 1

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Inline comments:
In @.github/renovate.json:
- Around line 13-16: Update the Renovate grouping rules to replace unsupported
matchPackagePatterns and matchMatchers keys with the supported matchPackageNames
and matchManagers keys, preserving their existing matching values and grouping
behavior.

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---

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Configuration used: defaults

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• .github/renovate.json

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[michael-valdron]

Hi @ysinghc,

Thanks for your contribution and apologies for the delayed response on your PR! 🚀

In case you're still interested in contributing towards our renovate onboarding, I've left a number of revision requests that should better match with a number of the other renovate configs we have (e.g. https://github.com/devfile/registry/blob/main/renovate.json and https://github.com/devfile/registry-support/blob/main/renovate.json).

For package managers let's start with only the GitHub actions for the initial config and we'll add additional custom managers, such as our reference to the Kubernetes generation scripts, later based on our needs (see my review comments about Go patching).

[michael-valdron]

@ysinghc One extra comment, ensure you include sign off trailers in all your commits, DCO is required for CNCF projects.

[ysinghc]

Hi @ysinghc,

Thanks for your contribution and apologies for the delayed response on your PR! 🚀

In case you're still interested in contributing towards our renovate onboarding, I've left a number of revision requests that should better match with a number of the other renovate configs we have (e.g. https://github.com/devfile/registry/blob/main/renovate.json and https://github.com/devfile/registry-support/blob/main/renovate.json).

For package managers let's start with only the GitHub actions for the initial config and we'll add additional custom managers, such as our reference to the Kubernetes generation scripts, later based on our needs (see my review comments about Go patching).

I would love to contribute further towards the renovate onboarding effort.

[michael-valdron]

@ysinghc Looking good so far, a few more comments, new one and reopened one from before, and a request to sign off on all PR commits to satisfy the DCO check.

[michael-valdron]

@ysinghc Changes lgtm!

Last thing, change the title and description to best reflect the revisions done, once that's done I'll approve and merge.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 30.36%. Comparing base (0c95025) to head (006fdd6).
⚠️ Report is 16 commits behind head on main.

❗ There is a different number of reports uploaded between BASE (0c95025) and HEAD (006fdd6). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (0c95025)	HEAD (006fdd6)
	2	1

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1783      +/-   ##
==========================================
- Coverage   35.75%   30.36%   -5.40%     
==========================================
  Files          52       68      +16     
  Lines        6696     8162    +1466     
==========================================
+ Hits         2394     2478      +84     
- Misses       4158     5525    +1367     
- Partials      144      159      +15     

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[michael-valdron]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: michael-valdron, ysinghc

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