Potential fix for code scanning alert no. 1: Workflow does not contain permissions

[sanjomo]

Potential fix for https://github.com/socketio4j/netty-socketio/security/code-scanning/1

To fix this issue, add a permissions block that explicitly restricts the permissions for the generated GITHUB_TOKEN. The best and minimal permissions to build Java code and use actions/checkout are contents: read. This block can be added at the root of the workflow (applies to all jobs/subsequent jobs by default) or under the specific job (here, build) if you want different permissions for other jobs.
The modification is to add:

permissions:
  contents: read

directly under the name: block, before the on: block (root-level), in the .github/workflows/build.yml workflow file. No new imports, methods, or any additional definitions are needed for this change.

---

Suggested fixes powered by Copilot Autofix. Review carefully before merging.

Summary by CodeRabbit

• Chores
  • Updated build workflow configuration to enhance security and access controls.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai]

Walkthrough

A permissions block is added to the GitHub Actions build workflow, granting read access to repository contents. This change affects only the workflow configuration without modifying job definitions, steps, or triggers.

Changes

Cohort / File(s)	Summary
GitHub Actions Workflow Configuration .github/workflows/build.yml	Adds a top-level permissions block to the workflow, granting read access to repository contents

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

• Straightforward addition of a security permissions declaration
• No logic changes, dependencies, or conditional flow modifications
• Single file modification with minimal scope

Poem

🐰 A little block of read-access here,
Permissions granted, crystal clear,
Security strengthens with a touch so light,
The workflow stands more secure and right! ✨

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarizes the main change: adding a permissions block to fix a code scanning alert in the workflow file.
Description check	✅ Passed	The description provides clear context, links to the security issue, explains the fix with example YAML, and indicates the location for the change.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch alert-autofix-1

---

📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 4a7b097 and 717eac1.

📒 Files selected for processing (1)

• .github/workflows/build.yml (1 hunks)

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (5)

• GitHub Check: build (21) / build
• GitHub Check: build (25) / build
• GitHub Check: build (17) / build
• GitHub Check: Analyze (java-kotlin)
• GitHub Check: Analyze (java-kotlin)

🔇 Additional comments (1)

.github/workflows/build.yml (1)

2-3: Approved: Security hardening with explicit minimal permissions.

The addition of the permissions block is a positive security improvement that aligns with GitHub Actions best practices. The contents: read permission is the minimal required permission for this workflow's operations (checkout, checkout-dependent actions, and local Maven build).

Verification confirms that the calling workflow .github/workflows/build-pr.yml already declares permissions: contents: read, matching the permission level being added to build.yml. This change is fully compatible with no functional impact.

---

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