action.yml

name: Checks for system dependency for given Ruby gem and installs if needed
inputs:
  gem-name:
    required: true
    description: "Name of the gem that requires system dependency "
  required-library:
    required: true
    description: "Name of the library to be installed (use a space-delimited string for multiple libraries)"
  package-manager:
    required: false
    description: "Name of package manager"
    default: "apt-get"

runs:
  using: composite
  steps:
    - name: Check for gem dependency
      shell: bash
      id: dependency
      run: |
        echo "Checking if ${{ inputs.gem-name }} is needed"
        echo "COUNT=$(grep -s ${{ inputs.gem-name }} Gemfile* *.gemspec | wc -l)" >> $GITHUB_OUTPUT
    - name: Install system dependency for gem
      if: ${{ steps.dependency.outputs.COUNT > 0 }}
      shell: bash
      run: |
        echo "${{ inputs.gem-name }} is needed, installing ${{ inputs.required-library }} system dependency"
        sudo ${{ inputs.package-manager }} update
        sudo ${{ inputs.package-manager }} -y install ${{ inputs.required-library }}