action.yml

---
name: 'Derive Ruby versions'
description: "Determine Ruby version testing matrix based on the gemspec's required_ruby_version field"
inputs:
  filename:
    description: 'Gemspec filename'
    required: false
    default: '*.gemspec'
  repository:
    description: 'Repository to checkout'
    required: false
    type: string
  ref:
    description: 'Git ref to checkout'
    required: false
    type: string
outputs:
  versions:
    description: "Ruby versions"
    value: ${{ steps.script.outputs.ruby }}
runs:
  using: "composite"
  steps:
    - uses: actions/checkout@v4
      with:
        repository: ${{ inputs.repository }}
        ref: ${{ inputs.ref }}
    - id: script
      # TODO spaces vs glob: compgen -G
      run: ${{ github.action_path }}/extract_compatible_ruby_versions ${{ inputs.filename }}
      shell: bash