Please define actions workflow permissions

.github/workflows/ruby.yml から始め、その jobs、run ステップ、uses エントリを調べて、必要最小限の GitHub Actions 権限を判断します。適切なスコープで最小権限の permissions ブロックを追加し、既存のフォーマットを維持して、YAML とワークフローの動作を検証します。指定されたワークフローに明示的な権限があり、引き続き正しく動作すれば完了です。

Workflow permissions improvement

There are 1 workflow file that are currently lacking explicit permissions

Affected Workflow Files

The following workflow files need permissions to be explicitly defined:

• .github/workflows/ruby.yml

Request

Ensure permissions are explicitly defined. Below are Copilot prompts/instructions if you would like Copilot's assistance with addressing this.

GitHub Copilot Assignment Prompts and Context

Task: Add explicit permissions to GitHub Actions workflow files that are currently missing them.

Scope: Update the workflow files listed above to include appropriate permissions: blocks.

Analysis Methodology:

1. Gather Current State: Check if the workflow has any existing permissions defined
2. Inventory Workflow Actions:
   • Actions performed directly by the workflow
   • API calls made by the workflow
   • External actions included via uses: statements
3. Determine Required Permissions: Map each action to its minimum required permissions
4. Synthesize Minimal Permissions: Create permissions block with only necessary permissions

Requirements:

1. Add a permissions: block to each workflow file that doesn't have one
2. Start with contents: read as the minimum permission
3. Add additional permissions only if the workflow actually needs them based on the actions it performs
4. Place the permissions: block at the job level or workflow level as appropriate
5. Ensure the syntax is correct and follows YAML formatting
6. Maintain existing content formatting, including indentation and comments

Files to modify: See the list of affected workflow files above.

Acceptance criteria:

• All listed workflow files have explicit permissions defined
• Permissions follow the principle of least privilege
• YAML syntax is valid
• Workflows still function correctly after changes

Copilot Instructions:

Please create a pull request that adds appropriate permissions: blocks to each of the workflow files listed above. Analyze each workflow to determine the minimum permissions required based on the actions it performs, and add only those necessary permissions.