### Basic Ruby Setup in GitHub Actions Workflow

Source: https://github.com/ruby/setup-ruby/blob/master/README.md

This snippet demonstrates the basic usage of the setup-ruby action in a GitHub Actions workflow. It checks out the repository, sets up Ruby version '3.4', and enables automatic bundler installation and caching.

```yaml
name: My workflow
on: [push, pull_request]
jobs:
  test:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v5
    - uses: ruby/setup-ruby@v1
      with:
        ruby-version: '3.4' # Not needed with a .ruby-version, .tool-versions or mise.toml
        bundler-cache: true # runs 'bundle install' and caches installed gems automatically
    - run: bundle exec rake
```

--------------------------------

### Setup Ruby with Bundler Cache

Source: https://github.com/ruby/setup-ruby/blob/master/README.md

This snippet demonstrates how to set up a Ruby environment using the setup-ruby action and enable Bundler caching. It also shows how to manage a corrupted cache by setting a new cache-version.

```yaml
- uses: ruby/setup-ruby@v1
      with:
        bundler-cache: true
        cache-version: 1
```

--------------------------------

### Install Dependencies with Yarn

Source: https://github.com/ruby/setup-ruby/blob/master/CONTRIBUTING.md

Installs project dependencies using Yarn. This is preferred over npm for correct ESLint dependency installation.

```bash
yarn install
```

--------------------------------

### Automatic Bundler Install and Caching

Source: https://github.com/ruby/setup-ruby/blob/master/README.md

Configures the setup-ruby action to automatically run `bundle install` and cache the installed gems. This speeds up gem installation significantly and reduces requests to RubyGems.org. It requires a Gemfile in the working directory.

```yaml
- uses: ruby/setup-ruby@v1
      with:
        bundler-cache: true
```

--------------------------------

### Matrix of Gemfiles for Testing

Source: https://github.com/ruby/setup-ruby/blob/master/README.md

Demonstrates setting up a Ruby environment with a specific Bundler version and caching for a matrix of Gemfiles in a GitHub Actions workflow. It configures the BUNDLE_GEMFILE environment variable to point to different Gemfile locations.

```yaml
name: My workflow
on: [push, pull_request]
jobs:
  test:
    strategy:
      fail-fast: false
      matrix:
        gemfile: [ rails7, rails8 ]
    runs-on: ubuntu-latest
    env: # $BUNDLE_GEMFILE must be set at the job level, so it is set for all steps
      BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/${{ matrix.gemfile }}.gemfile
    steps:
      - uses: actions/checkout@v5
      - uses: ruby/setup-ruby@v1
        with:
          ruby-version: '3.4'
          bundler-cache: true # runs 'bundle install' and caches installed gems automatically
      - run: bundle exec rake
```

--------------------------------

### Matrix Testing with Multiple Ruby Versions and Platforms

Source: https://github.com/ruby/setup-ruby/blob/master/README.md

This snippet showcases how to use a matrix strategy in a GitHub Actions workflow to test across different Ruby versions (MRI, JRuby, TruffleRuby) and operating systems (Ubuntu, macOS). It includes checking out code, setting up the specified Ruby version, and caching gems.

```yaml
name: My workflow
on: [push, pull_request]
jobs:
  test:
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, macos-latest]
        # Due to https://github.com/actions/runner/issues/849, we have to use quotes for '3.0'
        ruby: ['2.7', '3.0', '3.1', '3.2', '3.3', '3.4', head, jruby, jruby-head, truffleruby, truffleruby-head]
    runs-on: ${{ matrix.os }}
    steps:
    - uses: actions/checkout@v5
    - uses: ruby/setup-ruby@v1
      with:
        ruby-version: ${{ matrix.ruby }}
        bundler-cache: true # runs 'bundle install' and caches installed gems automatically
    - run: bundle exec rake
```

--------------------------------

### Add Git Pre-commit Hook

Source: https://github.com/ruby/setup-ruby/blob/master/CONTRIBUTING.md

Copies the pre-commit script to the .git/hooks directory, enabling it as a pre-commit hook for Git. This helps automate checks before commits.

```bash
cp pre-commit .git/hooks/pre-commit
```

--------------------------------

### Regenerate dist/index.js with Yarn

Source: https://github.com/ruby/setup-ruby/blob/master/CONTRIBUTING.md

Regenerates the dist/index.js file using the 'package' script defined in yarn. This is typically used for packaging the project.

```bash
yarn run package
```

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